Re: Using parallellisation
2014-04-11 3:10 GMT+02:00 Andy Fingerhut andy.finger...@gmail.com: Your check-concurrent2 is a much better way to use parallelism in your program -- create a few threads, each of which does a lot of work. I haven't analyzed the values you are computing in detail, but note that your program still has lots of inter-thread 'communication' because of the use of a common atom in your main-function. If you can get the correct final answer by having each thread calculate independent values, or collections of values, and then somehow combining them together when they are all finished with a bit of quick-running sequential code, that might give you even better parallel speedup than check-concurrent2. I display immediately found worse values and those are dependent on what is found in the other t hreads, but I will think about it. I am certainly impressed by the result: less as 10% overhead. I do not think that the inter-thread communication is a real problem, because when I calculate it for ten time as much values it takes 309 seconds. That is almost exactly ten times as much time, so this communication is (in this case) not a bottleneck. The use of asterisks at beginning and end of a symbol name is traditionally used on Clojure (and Common Lisp, from whence this tradition came) if the var is dynamically bound, meaning different threads typically do things like (binding [*dynamic-var* value-to-use-in-my-thread] code here). There is no need for that in your program, and leaving off the asterisks (or earmuffs) is common practice. So my code is not to bad? :-D For the explanation of the 1-minute delay, see the end of the last example on ClojureDocs for the future function: http://clojuredocs.org/clojure_core/clojure.core/future I added (shutdown-agents) and the delay is gone. On Thu, Apr 10, 2014 at 4:35 PM, Cecil Westerhof cldwester...@gmail.comwrote: 2014-04-10 16:45 GMT+02:00 Andy Fingerhut andy.finger...@gmail.com: Forcing small bits of computation to be done in parallel using the tools Clojure and the JVM have at hand, e.g. pmap, future, etc., which rely on creating JVM Thread objects, tends to slow things down rather than speed things up, because the extra overhead of creating threads and waiting for them to finish is higher than the cost of sequentially doing the small bits of computation. If you want to force parallelism in your example anyway, to compare the most-likely-slower-performance against what you have now, you can try this: (let [val (Math/sqrt i) a1 (future (Math/pow val 2)) a2 (future (* val val)) diff (Math/abs (- @a1 @a2))] The first form of concurrency was very bad indeed. I attached the script I made. (With the first form of concurrency disabled.) The sequential version takes between 1:52 and 1:56 with 18% CPU. The first form of concurrency took 2 hours and 45 minutes with 26% CPU. That is about 87 times as long, so very bad indeed. A future seems to be very expensive. The second form of concurrency takes around 31 seconds with 57% CPU. So about 3.7 times as fast. So that is a good improvement. The output is not complete the same, but that is not important in this case. By the way: is this the right way to write Clojure code? Especially: are the names max-diff and max-factor correct, or should the names be called different? For example: *max-fiff*. I call the script with: date +%T ; clojure ~/Clojure/check-power.clj ; date +%T This gives: 00:52:10 00:52:11: Start sequential 00:52:11: Different for 838 (1.136868e-13, 1.356645e-16) 00:52:11: Different for 3352 (4.547474e-13, 1.356645e-16) 00:52:11: Different for 5343 (9.094947e-13, 1.702217e-16) 00:52:11: Different for 9470 (1.818989e-12, 1.920791e-16) 00:52:11: Different for19922 (3.637979e-12, 1.826111e-16) 00:52:11: Different for33757 (7.275958e-12, 2.155392e-16) 00:52:11: Different for65830 (1.455192e-11, 2.210529e-16) 00:52:11: Different for 132323 (2.910383e-11, 2.199454e-16) 00:52:11: Different for 263320 (5.820766e-11, 2.210529e-16) 00:52:12: Different for 524523 (1.164153e-10, 2.219451e-16) 00:52:12: Different for 1052879 (2.328306e-10, 2.211371e-16) 00:52:12: Different for 2097255 (4.656613e-10, 2.220337e-16) 00:52:12: Different for 4194573 (9.313226e-10, 2.220304e-16) 00:52:12: Different for 8389020 (1.862645e-09, 2.220337e-16) 00:52:13: Different for 1681 (3.725290e-09, 2.220371e-16) 00:52:16: Different for 33554486 (7.450581e-09, 2.220442e-16) 00:52:19: Different for 67110098 (1.490116e-08, 2.220405e-16) 00:52:27: Different for134217944 (2.980232e-08, 2.220442e-16) 00:52:42: Different for268436271 (5.960464e-08, 2.220439e-16) 00:53:13: Different for536871776 (1.192093e-07, 2.220442e-16)
Re: [ANN] Zengarden. A Clojure library for generating CSS
ok, I understand now. thx D On Friday, 11 April 2014 12:16:02 UTC+10, frye wrote: I actually did take Joel up on his offer. But my feature requests are on the back burner for the moment. I happen to be building a product, that needs what Zengarden provides. Mainly authoring gnarly things like @import, @media queries, pseudo classes, etc, *declaratively, from edn*. That was the main impetus for this tool. I tried, and couldn't get that working with garden. You have to drop down to a repl to generate @import and @media queries. So while I personally need these things, I'm also happy to fold those features, back into garden. I'd actually prefer that, so we can have all of these features in one place. Tim Washington Interruptsoftware.com http://interruptsoftware.com On Thu, Apr 10, 2014 at 9:09 PM, Dave Sann dave...@gmail.comjavascript: wrote: what is different from what Joel already did? I think Joel was asking for input to help develop garden further it would be great to see efforts go into one thing - unless you have really divergent ideas Dave On Friday, 11 April 2014 01:07:47 UTC+10, frye wrote: Zengarden is a riff on Joel Holdbrooks' excellent gardenhttps://github.com/noprompt/gardenlibrary. Zengarden is a simple tool for generating CSS in Clojure. The goal is to cover most of CSS3https://developer.mozilla.org/en-US/docs/Web/CSS/CSS3. The spirit of the library is to have declarative syntax, and be controllable from edn. Github https://github.com/twashing/zengarden and Clojars https://clojars.org/zengarden resources are in the expected locations. This is an alpha release, so there's a lot of TODOs, and stuff that I haven't thought of. I've just built it for my own use case(s). When that happens, you can *i)* input raw CSS *ii)* send me feature requests or *iii)* send me a pull request. These are some things you get out of the box. - nesting syntax - declarative, controllable from edn - @import https://developer.mozilla.org/en-US/docs/Web/CSS/@import calls - @media https://developer.mozilla.org/en-US/docs/Web/CSS/@media queries - namespaceshttps://developer.mozilla.org/en-US/docs/Web/CSS/@namespace - pass in raw CSS I'm in the process of doing these other things. Pass in raw CSS, in lieu of. - pretty-printed or compressed output - inlined styling (for style attributes) - selectors (incl. *i.* attribute selectorshttp://dev.w3.org/csswg/selectors3/#attribute-selectors(ex: div[foo^=bar]) *ii.* combinators http://dev.w3.org/csswg/selectors3/#combinators *iii.* parent selectors ) - pseudo-elements (incl. pseudo-element functions (ex: div:lang(fr))) - @charsethttps://developer.mozilla.org/en-US/docs/Web/CSS/@charset, @supportshttps://developer.mozilla.org/en-US/docs/Web/CSS/@supports, ( @page https://developer.mozilla.org/en-US/docs/Web/CSS/@page, @documenthttps://developer.mozilla.org/en-US/docs/Web/CSS/@document, @font-facehttps://developer.mozilla.org/en-US/docs/Web/CSS/@font-faceand @keyframeshttps://developer.mozilla.org/en-US/docs/Web/CSS/@keyframes, not implemented; most are still experimental ) Please note that. - Zengarden makes no attempt to validate your CSS. it just knows how to handle a string pattern - Ensure to escape all quotations in a string - CSS Object Model http://dev.w3.org/csswg/cssom/ (ex: CSSImportRulehttp://dev.w3.org/csswg/cssom/#the-cssimportrule-interface, CSSMediaRulehttp://dev.w3.org/csswg/cssom/#the-cssmediarule-interface) is not implemented. I'll wait until the need arises. These are some scss http://sass-lang.com/ features that look interesting. - variables - partials - mixins - operators - inheritance But as we are in Clojure, I don't want to pull in sass idioms wholesale. So I think garden has the right idea in that respect. - garden declarations - garden units - garden color - garden arithmetic I'll wait for the need to arise, before wasting too much time or energy in any direction. Feedback is welcome. Tim Washington Interruptsoftware.com http://interruptsoftware.com -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Advice for building backend REST services from scratch using clojure
As others have said - a more focused question would help. Our back end runs on ring + compojure using https://github.com/jkk/honeysql for querying and straight https://github.com/clojure/java.jdbc for writes. We use https://github.com/marick/Midje/wiki rather than clojure.test and https://github.com/gdeer81/marginalia for documentation. This is the first major Clojure app, so lots of lessons have been learnt. Things I wish I knew: - read the ring spec - it is all just a map, phenomenally powerful. Now read it again - consider using https://github.com/zcaudate/lein-midje-doc as well as/instead of marginalia - consider using https://github.com/jaycfields/expectations instead of midje. Midje is fantastic, but expectations, particularly the 'diffing' looks like a real win - consider using something like https://github.com/prismatic/schema to document your API from day one. - you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). Just my random, off the cuff thoughts. Hope they help. On Thursday, April 10, 2014 3:13:19 PM UTC+1, Kashyap CK wrote: Hi, I have the opportunity to build a set of services from scratch. I plan to use clojure for this. I'd like to experiment with options available out there - options such as - what webserver, what database etc. I'd like it very much if you could share some of your experiences in this and possibly some pitfalls to avoid. Regards, Kashyap -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Real World Example
I'm building a fairly large real-world system called Clortex [1], which is a rewrite of the Numenta Platform for Intelligent Computing (NuPIC) [2]. As it's a greenfield project, I've chosen to use Clojure components all the way through instead of fitting in with Java-based or .Net-based frameworks. There are good reasons why you should do this if you can, but obviously that doesn't help you directly with your question. [off topic] Wow... good thing I read your post... I was just about to do the same thing having followed the development of HTM for some time now and finding their reference implementation to be somewhat convoluted. I thought Clojure would be a better language for it... TBD. Let me know if/how I can help. Alan -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Using parallellisation
I haven't tried it, but for parallelisation it's sometimes worth starting from more array-oriented code, e.g. (defn max-diff [check-until] (let [val (map #(Math/sqrt %) (range 1 check-until))] (reduce max (map #(Math/abs (- %1 %2)) (map #(Math/pow % 2) val) (map #(* % %) val) On Friday, 11 April 2014 07:43:44 UTC+1, Cecil Westerhof wrote: 2014-04-11 3:10 GMT+02:00 Andy Fingerhut andy.fi...@gmail.comjavascript: : Your check-concurrent2 is a much better way to use parallelism in your program -- create a few threads, each of which does a lot of work. I haven't analyzed the values you are computing in detail, but note that your program still has lots of inter-thread 'communication' because of the use of a common atom in your main-function. If you can get the correct final answer by having each thread calculate independent values, or collections of values, and then somehow combining them together when they are all finished with a bit of quick-running sequential code, that might give you even better parallel speedup than check-concurrent2. I display immediately found worse values and those are dependent on what is found in the other t hreads, but I will think about it. I am certainly impressed by the result: less as 10% overhead. I do not think that the inter-thread communication is a real problem, because when I calculate it for ten time as much values it takes 309 seconds. That is almost exactly ten times as much time, so this communication is (in this case) not a bottleneck. The use of asterisks at beginning and end of a symbol name is traditionally used on Clojure (and Common Lisp, from whence this tradition came) if the var is dynamically bound, meaning different threads typically do things like (binding [*dynamic-var* value-to-use-in-my-thread] code here). There is no need for that in your program, and leaving off the asterisks (or earmuffs) is common practice. So my code is not to bad? :-D For the explanation of the 1-minute delay, see the end of the last example on ClojureDocs for the future function: http://clojuredocs.org/clojure_core/clojure.core/future I added (shutdown-agents) and the delay is gone. On Thu, Apr 10, 2014 at 4:35 PM, Cecil Westerhof cldwes...@gmail.comjavascript: wrote: 2014-04-10 16:45 GMT+02:00 Andy Fingerhut andy.fi...@gmail.comjavascript: : Forcing small bits of computation to be done in parallel using the tools Clojure and the JVM have at hand, e.g. pmap, future, etc., which rely on creating JVM Thread objects, tends to slow things down rather than speed things up, because the extra overhead of creating threads and waiting for them to finish is higher than the cost of sequentially doing the small bits of computation. If you want to force parallelism in your example anyway, to compare the most-likely-slower-performance against what you have now, you can try this: (let [val (Math/sqrt i) a1 (future (Math/pow val 2)) a2 (future (* val val)) diff (Math/abs (- @a1 @a2))] The first form of concurrency was very bad indeed. I attached the script I made. (With the first form of concurrency disabled.) The sequential version takes between 1:52 and 1:56 with 18% CPU. The first form of concurrency took 2 hours and 45 minutes with 26% CPU. That is about 87 times as long, so very bad indeed. A future seems to be very expensive. The second form of concurrency takes around 31 seconds with 57% CPU. So about 3.7 times as fast. So that is a good improvement. The output is not complete the same, but that is not important in this case. By the way: is this the right way to write Clojure code? Especially: are the names max-diff and max-factor correct, or should the names be called different? For example: *max-fiff*. I call the script with: date +%T ; clojure ~/Clojure/check-power.clj ; date +%T This gives: 00:52:10 00:52:11: Start sequential 00:52:11: Different for 838 (1.136868e-13, 1.356645e-16) 00:52:11: Different for 3352 (4.547474e-13, 1.356645e-16) 00:52:11: Different for 5343 (9.094947e-13, 1.702217e-16) 00:52:11: Different for 9470 (1.818989e-12, 1.920791e-16) 00:52:11: Different for19922 (3.637979e-12, 1.826111e-16) 00:52:11: Different for33757 (7.275958e-12, 2.155392e-16) 00:52:11: Different for65830 (1.455192e-11, 2.210529e-16) 00:52:11: Different for 132323 (2.910383e-11, 2.199454e-16) 00:52:11: Different for 263320 (5.820766e-11, 2.210529e-16) 00:52:12: Different for 524523 (1.164153e-10, 2.219451e-16) 00:52:12: Different for 1052879 (2.328306e-10, 2.211371e-16) 00:52:12: Different for 2097255 (4.656613e-10, 2.220337e-16) 00:52:12: Different for 4194573 (9.313226e-10, 2.220304e-16) 00:52:12: Different for 8389020 (1.862645e-09, 2.220337e-16)
Re: Real World Example
Hi Alan, Thanks for your interest - everywhere I mention this in the Clojure world I get the same reaction! This is one of the reasons why I settled on Clojure a couple of months back (Erlang and Elixir were also good choices, but the Clojure movement has so much energy it was a no-brainer). I'm in the middle of developing the key algorithms for Clortex, and exploring a number of approaches at the same time, so the code is a bit of a tangle in places right now. Once it's a little more stable I'll make it public. In the meantime, if you're interested (and know HTM/CLA to some extent), please send me your github handle offlist and I'll add you as a contributor. Regards, Fergal On Fri, Apr 11, 2014 at 10:03 AM, Alan Moore kahunamo...@gmail.com wrote: I'm building a fairly large real-world system called Clortex [1], which is a rewrite of the Numenta Platform for Intelligent Computing (NuPIC) [2]. As it's a greenfield project, I've chosen to use Clojure components all the way through instead of fitting in with Java-based or .Net-based frameworks. There are good reasons why you should do this if you can, but obviously that doesn't help you directly with your question. [off topic] Wow... good thing I read your post... I was just about to do the same thing having followed the development of HTM for some time now and finding their reference implementation to be somewhat convoluted. I thought Clojure would be a better language for it... TBD. Let me know if/how I can help. Alan -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- Fergal Byrne, Brenter IT Author, Real Machine Intelligence with Clortex and NuPIC https://leanpub.com/realsmartmachines http://www.examsupport.iehttp://inbits.com - Better Living through Thoughtful Technology http://ie.linkedin.com/in/fergbyrne/ https://github.com/fergalbyrne e:fergalbyrnedub...@gmail.com t:+353 83 4214179 Formerly of Adnet edi...@adnet.ie http://www.adnet.ie -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Advice for building backend REST services from scratch using clojure
you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). As the developer of Cursive, I'd like to politely disagree with this point. I think that Cursive provides a very competitive feature set but without the swearing :-). Of course I'm totally biased, so take with a grain of salt, but I think particularly for Clojure newbies it's worth a look - learning Emacs at the same time as Clojure can be a recipe for frustration. Of course, it doesn't have to be Cursive, there are other options in case Emacs gives you hives. On 11 April 2014 20:17, Colin Yates colin.ya...@gmail.com wrote: As others have said - a more focused question would help. Our back end runs on ring + compojure using https://github.com/jkk/honeysql for querying and straight https://github.com/clojure/java.jdbc for writes. We use https://github.com/marick/Midje/wiki rather than clojure.test and https://github.com/gdeer81/marginalia for documentation. This is the first major Clojure app, so lots of lessons have been learnt. Things I wish I knew: - read the ring spec - it is all just a map, phenomenally powerful. Now read it again - consider using https://github.com/zcaudate/lein-midje-doc as well as/instead of marginalia - consider using https://github.com/jaycfields/expectations instead of midje. Midje is fantastic, but expectations, particularly the 'diffing' looks like a real win - consider using something like https://github.com/prismatic/schema to document your API from day one. - you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). Just my random, off the cuff thoughts. Hope they help. On Thursday, April 10, 2014 3:13:19 PM UTC+1, Kashyap CK wrote: Hi, I have the opportunity to build a set of services from scratch. I plan to use clojure for this. I'd like to experiment with options available out there - options such as - what webserver, what database etc. I'd like it very much if you could share some of your experiences in this and possibly some pitfalls to avoid. Regards, Kashyap -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Advice for building backend REST services from scratch using clojure
Just for the record ... I am an emacs fan :) Had been a vim power user for a long time but switched to emacs after the fp bug bit me. Regards, Kashyap On Fri, Apr 11, 2014 at 2:50 PM, Colin Fleming colin.mailingl...@gmail.comwrote: you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). As the developer of Cursive, I'd like to politely disagree with this point. I think that Cursive provides a very competitive feature set but without the swearing :-). Of course I'm totally biased, so take with a grain of salt, but I think particularly for Clojure newbies it's worth a look - learning Emacs at the same time as Clojure can be a recipe for frustration. Of course, it doesn't have to be Cursive, there are other options in case Emacs gives you hives. On 11 April 2014 20:17, Colin Yates colin.ya...@gmail.com wrote: As others have said - a more focused question would help. Our back end runs on ring + compojure using https://github.com/jkk/honeysql for querying and straight https://github.com/clojure/java.jdbc for writes. We use https://github.com/marick/Midje/wiki rather than clojure.test and https://github.com/gdeer81/marginalia for documentation. This is the first major Clojure app, so lots of lessons have been learnt. Things I wish I knew: - read the ring spec - it is all just a map, phenomenally powerful. Now read it again - consider using https://github.com/zcaudate/lein-midje-doc as well as/instead of marginalia - consider using https://github.com/jaycfields/expectations instead of midje. Midje is fantastic, but expectations, particularly the 'diffing' looks like a real win - consider using something like https://github.com/prismatic/schemato document your API from day one. - you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). Just my random, off the cuff thoughts. Hope they help. On Thursday, April 10, 2014 3:13:19 PM UTC+1, Kashyap CK wrote: Hi, I have the opportunity to build a set of services from scratch. I plan to use clojure for this. I'd like to experiment with options available out there - options such as - what webserver, what database etc. I'd like it very much if you could share some of your experiences in this and possibly some pitfalls to avoid. Regards, Kashyap -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Advice for building backend REST services from scratch using clojure
Ah, ok - if you're already using Emacs then have at it :-) On 11 April 2014 21:32, C K Kashyap ckkash...@gmail.com wrote: Just for the record ... I am an emacs fan :) Had been a vim power user for a long time but switched to emacs after the fp bug bit me. Regards, Kashyap On Fri, Apr 11, 2014 at 2:50 PM, Colin Fleming colin.mailingl...@gmail.com wrote: you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). As the developer of Cursive, I'd like to politely disagree with this point. I think that Cursive provides a very competitive feature set but without the swearing :-). Of course I'm totally biased, so take with a grain of salt, but I think particularly for Clojure newbies it's worth a look - learning Emacs at the same time as Clojure can be a recipe for frustration. Of course, it doesn't have to be Cursive, there are other options in case Emacs gives you hives. On 11 April 2014 20:17, Colin Yates colin.ya...@gmail.com wrote: As others have said - a more focused question would help. Our back end runs on ring + compojure using https://github.com/jkk/honeysql for querying and straight https://github.com/clojure/java.jdbc for writes. We use https://github.com/marick/Midje/wiki rather than clojure.test and https://github.com/gdeer81/marginalia for documentation. This is the first major Clojure app, so lots of lessons have been learnt. Things I wish I knew: - read the ring spec - it is all just a map, phenomenally powerful. Now read it again - consider using https://github.com/zcaudate/lein-midje-doc as well as/instead of marginalia - consider using https://github.com/jaycfields/expectations instead of midje. Midje is fantastic, but expectations, particularly the 'diffing' looks like a real win - consider using something like https://github.com/prismatic/schemato document your API from day one. - you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). Just my random, off the cuff thoughts. Hope they help. On Thursday, April 10, 2014 3:13:19 PM UTC+1, Kashyap CK wrote: Hi, I have the opportunity to build a set of services from scratch. I plan to use clojure for this. I'd like to experiment with options available out there - options such as - what webserver, what database etc. I'd like it very much if you could share some of your experiences in this and possibly some pitfalls to avoid. Regards, Kashyap -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because
Re: Advice for building backend REST services from scratch using clojure
Colin - you are right - I shouldn't throw out such inflammatory marks, particularly when they do a disservice to the excellent work done in Cursive Clojure, Lighttable and Counter Clockwise (and others that I am not aware off). For me personally, after years of using Eclipse then IntelliJ and (to a much lesser degree) Sublime I am forcing my team to use emacs. And yes, forcing is the word as they are utterly sold on sublime and really don't like me much at the moment :). It is the classical short term/long term win, and emacs is worth the investment for us. But it absolutely is an investment. Disclaimer - I haven't looked at any of the other editors for months if not years. On Friday, April 11, 2014 10:20:37 AM UTC+1, Colin Fleming wrote: you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). As the developer of Cursive, I'd like to politely disagree with this point. I think that Cursive provides a very competitive feature set but without the swearing :-). Of course I'm totally biased, so take with a grain of salt, but I think particularly for Clojure newbies it's worth a look - learning Emacs at the same time as Clojure can be a recipe for frustration. Of course, it doesn't have to be Cursive, there are other options in case Emacs gives you hives. On 11 April 2014 20:17, Colin Yates colin...@gmail.com javascript:wrote: As others have said - a more focused question would help. Our back end runs on ring + compojure using https://github.com/jkk/honeysql for querying and straight https://github.com/clojure/java.jdbc for writes. We use https://github.com/marick/Midje/wiki rather than clojure.test and https://github.com/gdeer81/marginalia for documentation. This is the first major Clojure app, so lots of lessons have been learnt. Things I wish I knew: - read the ring spec - it is all just a map, phenomenally powerful. Now read it again - consider using https://github.com/zcaudate/lein-midje-doc as well as/instead of marginalia - consider using https://github.com/jaycfields/expectations instead of midje. Midje is fantastic, but expectations, particularly the 'diffing' looks like a real win - consider using something like https://github.com/prismatic/schemato document your API from day one. - you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). Just my random, off the cuff thoughts. Hope they help. On Thursday, April 10, 2014 3:13:19 PM UTC+1, Kashyap CK wrote: Hi, I have the opportunity to build a set of services from scratch. I plan to use clojure for this. I'd like to experiment with options available out there - options such as - what webserver, what database etc. I'd like it very much if you could share some of your experiences in this and possibly some pitfalls to avoid. Regards, Kashyap -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com javascript: For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com javascript:. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Advice for building backend REST services from scratch using clojure
My two cents... Ring/Compojure, Friend, Datomic. I've had these in production since 2012, no issues really and its still fun to hack on them. On Thursday, 10 April 2014 15:13:19 UTC+1, Kashyap CK wrote: Hi, I have the opportunity to build a set of services from scratch. I plan to use clojure for this. I'd like to experiment with options available out there - options such as - what webserver, what database etc. I'd like it very much if you could share some of your experiences in this and possibly some pitfalls to avoid. Regards, Kashyap -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Advice for building backend REST services from scratch using clojure
No worries, I didn't think what you wrote was inflammatory and it's undeniable that Emacs has the largest mindshare in the Clojure world. But the alternatives are getting better and better and I think I could make a reasonable case that Cursive is better than Emacs for some circumstances and/or projects. I personally didn't like the initial versions of LightTable (it felt like a bit of a one-trick pony and the trick didn't really work for me) but the guys working on it are smart and I'm sure it's getting a lot of plugin love now it's open source, so I'm sure that'll be a real contender soon if it isn't already. Emacs clearly works for the OP so there's no issue there, but I think it's less and less a foregone conclusion that everyone will end up there. I personally wouldn't work for you if you forced me to use it, but that's just me :-) On 11 April 2014 22:04, Colin Yates colin.ya...@gmail.com wrote: Colin - you are right - I shouldn't throw out such inflammatory marks, particularly when they do a disservice to the excellent work done in Cursive Clojure, Lighttable and Counter Clockwise (and others that I am not aware off). For me personally, after years of using Eclipse then IntelliJ and (to a much lesser degree) Sublime I am forcing my team to use emacs. And yes, forcing is the word as they are utterly sold on sublime and really don't like me much at the moment :). It is the classical short term/long term win, and emacs is worth the investment for us. But it absolutely is an investment. Disclaimer - I haven't looked at any of the other editors for months if not years. On Friday, April 11, 2014 10:20:37 AM UTC+1, Colin Fleming wrote: you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). As the developer of Cursive, I'd like to politely disagree with this point. I think that Cursive provides a very competitive feature set but without the swearing :-). Of course I'm totally biased, so take with a grain of salt, but I think particularly for Clojure newbies it's worth a look - learning Emacs at the same time as Clojure can be a recipe for frustration. Of course, it doesn't have to be Cursive, there are other options in case Emacs gives you hives. On 11 April 2014 20:17, Colin Yates colin...@gmail.com wrote: As others have said - a more focused question would help. Our back end runs on ring + compojure using https://github.com/jkk/ honeysql for querying and straight https://github.com/clojure/java.jdbcfor writes. We use https://github.com/marick/Midje/wiki rather than clojure.test and https://github.com/gdeer81/marginalia for documentation. This is the first major Clojure app, so lots of lessons have been learnt. Things I wish I knew: - read the ring spec - it is all just a map, phenomenally powerful. Now read it again - consider using https://github.com/zcaudate/lein-midje-doc as well as/instead of marginalia - consider using https://github.com/jaycfields/expectations instead of midje. Midje is fantastic, but expectations, particularly the 'diffing' looks like a real win - consider using something like https://github.com/prismatic/schemato document your API from day one. - you can fight it as hard as you like but you will eventually end up using emacs, clojure-mode, cider, paredit and magit and then wonder how you ever lived without it, but not without spending at least a month or two cursing anything to do with emacs :). Just my random, off the cuff thoughts. Hope they help. On Thursday, April 10, 2014 3:13:19 PM UTC+1, Kashyap CK wrote: Hi, I have the opportunity to build a set of services from scratch. I plan to use clojure for this. I'd like to experiment with options available out there - options such as - what webserver, what database etc. I'd like it very much if you could share some of your experiences in this and possibly some pitfalls to avoid. Regards, Kashyap -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to
Is it possible to give an atomic message?
I have the following functions in my concurrent program: (def time-format (new java.text.SimpleDateFormat HH:mm:ss)) (defn now [] (new java.util.GregorianCalendar)) (defn give-message [message] (println (format %s: %s (. time-format format (. (now) getTime)) message))) But sometimes a new message from a different thread is displayed, before the current message is ready: 10:34:57: Different for 4194573 (9.313226e-10, 2.220304e-16)10:34:57: Different for 4198042 (9.313226e-10, 2.218469e-16) 10:34:57: Different for 8389473 (1.862645e-09, 2.220217e-16) Is there a way to make give-message atomic, so it would be displayed as: 10:34:57: Different for 4194573 (9.313226e-10, 2.220304e-16) 10:34:57: Different for 4198042 (9.313226e-10, 2.218469e-16) 10:34:57: Different for 8389473 (1.862645e-09, 2.220217e-16) I attached the complete program. Any hints to implement it better are appreciated. -- Cecil Westerhof -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. check-power.clj Description: Binary data
Re: Is it possible to give an atomic message?
You could do this with core.async. Make a channel that takes messages, and then run a go loop that pulls messages off the message channel and prints them. Then only one part of the program is ever printing. Any other part that wants to print a message can push onto the channel. On Fri, Apr 11, 2014 at 8:35 AM, Cecil Westerhof cldwester...@gmail.comwrote: I have the following functions in my concurrent program: (def time-format (new java.text.SimpleDateFormat HH:mm:ss)) (defn now [] (new java.util.GregorianCalendar)) (defn give-message [message] (println (format %s: %s (. time-format format (. (now) getTime)) message))) But sometimes a new message from a different thread is displayed, before the current message is ready: 10:34:57: Different for 4194573 (9.313226e-10, 2.220304e-16)10:34:57: Different for 4198042 (9.313226e-10, 2.218469e-16) 10:34:57: Different for 8389473 (1.862645e-09, 2.220217e-16) Is there a way to make give-message atomic, so it would be displayed as: 10:34:57: Different for 4194573 (9.313226e-10, 2.220304e-16) 10:34:57: Different for 4198042 (9.313226e-10, 2.218469e-16) 10:34:57: Different for 8389473 (1.862645e-09, 2.220217e-16) I attached the complete program. Any hints to implement it better are appreciated. -- Cecil Westerhof -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Clojure + BDD + TDD + Pairing...
Marcus, I think the idea of working on a small project with fellow novices would be a great idea. Tom On Tuesday, October 29, 2013 11:43:54 PM UTC-4, Marcus Blankenship wrote: Hi Folks, I’m a Clojure n00b, but am interested in finding another n00b who aspires to learn Clojure, and do so using BDD / TDD practices through regular pairing sessions. I’ve found novice - novice pairing to be a great way to ramp up on skills, but I don’t live near anyone who I can pair with. I’m thinking that doing 3 1-hour sessions a week, for a month, would give us a nice start. Obviously, this would be remote pairing via ScreenHero (or some other tool). Anyone interested? Best, Marcus marcus blankenship \\\ Partner, Problem Solver, Linear Thinker \\\ 541.805.2736 \ @justzeros \ skype:marcuscreo -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Meta-eX - The Music of Code
On 10 Apr 2014, at 03:18, Earl Jenkins ejenkins...@gmail.com wrote: Good stuff, all the hard work you've done in the field of live coding, yet no mention of Meta-ex nor clojure in the Computer Music Journal which has a whole issue dedicated to this subject ;( To be honest, Overtone was never targeted at academics. It was built for Clojure hackers to be able to use their programming skills to realise their musical ideas. As such, it's gained a lot of traction with progressional programmers. I'm continuously amazed with what people are doing with Overtone - stretching it in incredible ways. However, I feel that the best is still yet to come. Now is a fantastic time to get involved... Sam --- http://sam.aaron.name -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Is it possible to give an atomic message?
Hello, Here's maybe the easiest way, with locking: (defn give-message [message] (locking *out* (println (format %s: %s (. time-format format (. (now) getTime)) message Of course, locks can introduce their own problems, so maybe the next easiest way is with the combination of agent and send-off: (def out (agent *out*)) (defn give-message [message] (send-off out #(binding [*out* %] (println (format %s: %s (. time-format format (. (now) getTime)) message)) %))) Like with a core.async approach, this gives you queue-wise execution of give-message requests. Unlike with core.async, you don't need to manage your own consume/print thread. Personally, I wouldn't go with core.async until I was working with multiple consumers or had the need to 'combine' resources. Alan On Friday, April 11, 2014 9:35:52 AM UTC-4, Cecil Westerhof wrote: I have the following functions in my concurrent program: (def time-format (new java.text.SimpleDateFormat HH:mm:ss)) (defn now [] (new java.util.GregorianCalendar)) (defn give-message [message] (println (format %s: %s (. time-format format (. (now) getTime)) message))) But sometimes a new message from a different thread is displayed, before the current message is ready: 10:34:57: Different for 4194573 (9.313226e-10, 2.220304e-16)10:34:57: Different for 4198042 (9.313226e-10, 2.218469e-16) 10:34:57: Different for 8389473 (1.862645e-09, 2.220217e-16) Is there a way to make give-message atomic, so it would be displayed as: 10:34:57: Different for 4194573 (9.313226e-10, 2.220304e-16) 10:34:57: Different for 4198042 (9.313226e-10, 2.218469e-16) 10:34:57: Different for 8389473 (1.862645e-09, 2.220217e-16) I attached the complete program. Any hints to implement it better are appreciated. -- Cecil Westerhof -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Clojure + BDD + TDD + Pairing...
Hey Marcus, If you have Google Calendars, you can use that, and invite people to edit a particular calendar. It would start off as an honour system, so that people don't trample on each others bookings. But as Tom George points out, building such a booking tool, is a great project. Otherwise, I'm sure there's also other calendar / booking tools out there. I haven't tried basecamp in a while, but it's still popular. Others, feel free to share :) Tim Washington Interruptsoftware.com http://interruptsoftware.com On Thu, Apr 10, 2014 at 6:41 PM, Marcus Blankenship mar...@creoagency.comwrote: Hi Tim, awesome news!. I've had other folks today asking about it as well. Any idea how we could use a shared calendar to let people put down their availability, and then others can claim a spot to work with them? Or, maybe that's a Clojure project we should work on! ;-) But really, ideas accepted about what we could use, as I don't have any... On Apr 10, 2014, at 7:23 AM, Timothy Washington twash...@gmail.com wrote: I'm also keen. I'm on EST (GMT - 5). Saturdays and Sundays are good for me. But weekday evenings would also work. Tim Washington Interruptsoftware.com http://interruptsoftware.com/ On Wed, Mar 26, 2014 at 4:51 PM, Brian Muhia iambrianmu...@gmail.comwrote: Hi Josh, I'm interested in pairing as well. I'm also based in GMT+3. Best, - B On Wednesday, 30 October 2013 10:23:58 UTC+3, Josh Kamau wrote: I can do it with you if we limit the hours to Saturday and sunday. I am a noob though i have 2 apps in production. (You can get alot done without knowing the whole of clojure) I am in GMT +3 Thanks. On Wed, Oct 30, 2013 at 6:43 AM, Marcus Blankenship mar...@creoagency.com wrote: Hi Folks, I'm a Clojure n00b, but am interested in finding another n00b who aspires to learn Clojure, and do so using BDD / TDD practices through regular pairing sessions. I've found novice - novice pairing to be a great way to ramp up on skills, but I don't live near anyone who I can pair with. I'm thinking that doing 3 1-hour sessions a week, for a month, would give us a nice start. Obviously, this would be remote pairing via ScreenHero (or some other tool). Anyone interested? Best, Marcus marcus blankenship \\\ Partner, Problem Solver, Linear Thinker \\\ 541.805.2736 \ @justzeros \ skype:marcuscreo Best, Marcus Marcus Blankenship \\\ Problem Solver, Linear Thinker \\\ 541.805.2736 \ @justzeros \ skype:marcuscreo -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Is it possible to give an atomic message?
You could use a clojure agent http://clojure.org/agents, that would output your messages on a separate thread, one by one. (def *logger* (agent 0)) (defn give-message [message] (send *logger* (fn [_ [msg]] (println (format %s: %s (. time-format format (. (now) getTime)) msg))) message)) On Friday, April 11, 2014 7:20:52 PM UTC+5:45, Cecil Westerhof wrote: I have the following functions in my concurrent program: (def time-format (new java.text.SimpleDateFormat HH:mm:ss)) (defn now [] (new java.util.GregorianCalendar)) (defn give-message [message] (println (format %s: %s (. time-format format (. (now) getTime)) message))) But sometimes a new message from a different thread is displayed, before the current message is ready: 10:34:57: Different for 4194573 (9.313226e-10, 2.220304e-16)10:34:57: Different for 4198042 (9.313226e-10, 2.218469e-16) 10:34:57: Different for 8389473 (1.862645e-09, 2.220217e-16) Is there a way to make give-message atomic, so it would be displayed as: 10:34:57: Different for 4194573 (9.313226e-10, 2.220304e-16) 10:34:57: Different for 4198042 (9.313226e-10, 2.218469e-16) 10:34:57: Different for 8389473 (1.862645e-09, 2.220217e-16) I attached the complete program. Any hints to implement it better are appreciated. -- Cecil Westerhof -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Clojure + BDD + TDD + Pairing...
I haven't used it myself, but noted that Alex Miller used http://ohours.orgfor allowing others to schedule meetings with him. Andy On Fri, Apr 11, 2014 at 9:08 AM, Timothy Washington twash...@gmail.comwrote: Hey Marcus, If you have Google Calendars, you can use that, and invite people to edit a particular calendar. It would start off as an honour system, so that people don't trample on each others bookings. But as Tom George points out, building such a booking tool, is a great project. Otherwise, I'm sure there's also other calendar / booking tools out there. I haven't tried basecamp in a while, but it's still popular. Others, feel free to share :) Tim Washington Interruptsoftware.com http://interruptsoftware.com On Thu, Apr 10, 2014 at 6:41 PM, Marcus Blankenship mar...@creoagency.com wrote: Hi Tim, awesome news!. I've had other folks today asking about it as well. Any idea how we could use a shared calendar to let people put down their availability, and then others can claim a spot to work with them? Or, maybe that's a Clojure project we should work on! ;-) But really, ideas accepted about what we could use, as I don't have any... On Apr 10, 2014, at 7:23 AM, Timothy Washington twash...@gmail.com wrote: I'm also keen. I'm on EST (GMT - 5). Saturdays and Sundays are good for me. But weekday evenings would also work. Tim Washington Interruptsoftware.com http://interruptsoftware.com/ On Wed, Mar 26, 2014 at 4:51 PM, Brian Muhia iambrianmu...@gmail.comwrote: Hi Josh, I'm interested in pairing as well. I'm also based in GMT+3. Best, - B On Wednesday, 30 October 2013 10:23:58 UTC+3, Josh Kamau wrote: I can do it with you if we limit the hours to Saturday and sunday. I am a noob though i have 2 apps in production. (You can get alot done without knowing the whole of clojure) I am in GMT +3 Thanks. On Wed, Oct 30, 2013 at 6:43 AM, Marcus Blankenship mar...@creoagency.com wrote: Hi Folks, I'm a Clojure n00b, but am interested in finding another n00b who aspires to learn Clojure, and do so using BDD / TDD practices through regular pairing sessions. I've found novice - novice pairing to be a great way to ramp up on skills, but I don't live near anyone who I can pair with. I'm thinking that doing 3 1-hour sessions a week, for a month, would give us a nice start. Obviously, this would be remote pairing via ScreenHero (or some other tool). Anyone interested? Best, Marcus marcus blankenship \\\ Partner, Problem Solver, Linear Thinker \\\ 541.805.2736 \ @justzeros \ skype:marcuscreo Best, Marcus Marcus Blankenship \\\ Problem Solver, Linear Thinker \\\ 541.805.2736 \ @justzeros \ skype:marcuscreo -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[ANN]: clj.jdbc 0.1.1 - A jdbc library for clojure.
A JDBC library for clojure. Released: 2014-04-06 Changes: - Multiple connection pooling pluggable solutions: dbcp and c3p0 (every one resides on its own package without hard dependencies on them). - Set clojure 1.6 as default clojure version. - Allow set isolation level for transaction. - Allow set read-only transaction. - Multiple bugfixes. - Performance improvements. Complete changelog: https://raw.githubusercontent.com/niwibe/clj.jdbc/master/CHANGES.txt Github: https://github.com/niwibe/clj.jdbc Documentation: http://niwibe.github.io/clj.jdbc/ -- Andrey Antukh - Андрей Антух - andrei.anto...@kaleidos.net / n...@niwi.be http://www.niwi.be http://www.niwi.be/page/about/ https://github.com/niwibe -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Clojure + BDD + TDD + Pairing...
I can't get my google calendar to allow others to add / change events. If anyone else could set this up, it would be great! Or, if you have ideas on how I can do this, contact me off-list and I'll work on it. On Apr 11, 2014, at 9:38 AM, Andy Fingerhut andy.finger...@gmail.com wrote: I haven't used it myself, but noted that Alex Miller used http://ohours.org for allowing others to schedule meetings with him. Andy On Fri, Apr 11, 2014 at 9:08 AM, Timothy Washington twash...@gmail.com wrote: Hey Marcus, If you have Google Calendars, you can use that, and invite people to edit a particular calendar. It would start off as an honour system, so that people don't trample on each others bookings. But as Tom George points out, building such a booking tool, is a great project. Otherwise, I'm sure there's also other calendar / booking tools out there. I haven't tried basecamp in a while, but it's still popular. Others, feel free to share :) Tim Washington Interruptsoftware.com On Thu, Apr 10, 2014 at 6:41 PM, Marcus Blankenship mar...@creoagency.com wrote: Hi Tim, awesome news!. I've had other folks today asking about it as well. Any idea how we could use a shared calendar to let people put down their availability, and then others can claim a spot to work with them? Or, maybe that's a Clojure project we should work on! ;-) But really, ideas accepted about what we could use, as I don't have any... On Apr 10, 2014, at 7:23 AM, Timothy Washington twash...@gmail.com wrote: I'm also keen. I'm on EST (GMT - 5). Saturdays and Sundays are good for me. But weekday evenings would also work. Tim Washington Interruptsoftware.com On Wed, Mar 26, 2014 at 4:51 PM, Brian Muhia iambrianmu...@gmail.com wrote: Hi Josh, I'm interested in pairing as well. I'm also based in GMT+3. Best, - B On Wednesday, 30 October 2013 10:23:58 UTC+3, Josh Kamau wrote: I can do it with you if we limit the hours to Saturday and sunday. I am a noob though i have 2 apps in production. (You can get alot done without knowing the whole of clojure) I am in GMT +3 Thanks. On Wed, Oct 30, 2013 at 6:43 AM, Marcus Blankenship mar...@creoagency.com wrote: Hi Folks, I'm a Clojure n00b, but am interested in finding another n00b who aspires to learn Clojure, and do so using BDD / TDD practices through regular pairing sessions. I've found novice - novice pairing to be a great way to ramp up on skills, but I don't live near anyone who I can pair with. I'm thinking that doing 3 1-hour sessions a week, for a month, would give us a nice start. Obviously, this would be remote pairing via ScreenHero (or some other tool). Anyone interested? Best, Marcus marcus blankenship \\\ Partner, Problem Solver, Linear Thinker \\\ 541.805.2736 \ @justzeros \ skype:marcuscreo Best, Marcus Marcus Blankenship \\\ Problem Solver, Linear Thinker \\\ 541.805.2736 \ @justzeros \ skype:marcuscreo -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. Best, Marcus Marcus Blankenship \\\ Problem Solver, Linear Thinker \\\ 541.805.2736 \ @justzeros \ skype:marcuscreo -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received
Re: Advice for building backend REST services from scratch using clojure
You should take a look at Liberatorhttp://clojure-liberator.github.io/liberator/ for the REST services. We're using it at Ardoq http://ardoq.com to build our REST-APIs and we are very happy with it. kl. 16:13:19 UTC+2 torsdag 10. april 2014 skrev Kashyap CK følgende: Hi, I have the opportunity to build a set of services from scratch. I plan to use clojure for this. I'd like to experiment with options available out there - options such as - what webserver, what database etc. I'd like it very much if you could share some of your experiences in this and possibly some pitfalls to avoid. Regards, Kashyap -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Uberjar woes
Tom, Not sure if you every figured this out, but I'm having the same issue. In my case, the error points to the Lifecycle protocol in https://github.com/stuartsierra/component (com/stuartsierra/component/Lifecycle). It's a pretty barebones configuration. https://gist.github.com/jalehman/10494205 On Thursday, February 27, 2014 11:49:38 AM UTC-8, Tom Connors wrote: Hi Everyone, I've been having trouble creating an uberjar of a project and I'm hoping someone here can point me toward a solution. After cleaning out the target directory (with lein clean) and preprocessing my cljx, I can run the project with no trouble using lein repl and lein run. I can package up the project (lein with-profile prd uberjar) and get the resultant jar files. After that, the trouble starts. Running the jar (java -jar my-standalone.jar) fails with a NoClassDefFoundError error, pointing at a protocol defined in weaverjester's clout - https://github.com/weavejester/cloutclout/core/Route. I highly doubt clout actually has anything to do with the problem. After creating the uberjar, I can no longer run the project with lein run or lein repl - I get the same error, and I can't do anything with lein without getting that error until I remove the target directory. I've inspected the jar and can see that it contains clout, but just clout/core.clj - no .class files. I edited clout's project.clj to include :aot :all, packaged it into a jar, replaced the clout jar in my local maven repo with that new jar, and re-packaged my project. At this point, when I ran the jar, I got another NoClassDefFoundError, this time pointing at another protocol, but this one from clojure.core: clojure/lang/ILookupHost. I've been having this problem with the latest leiningen (2.3.4) and 2.2.0. I've been futzing with my project.clj for some time, but to no avail. Any help greatly appreciated. -Tom -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Helping newcomers get involved in Clojure projects
Anyone doing something about this? I would like to start contributing to some OSS it's the only chance I'll have to use clojure in something useful, I don't have the privilege to use it at work but I really don't know where to start. On Wed, Jan 29, 2014 at 3:49 PM, Bridget bridget.hill...@gmail.com wrote: On Monday, January 27, 2014 9:35:17 AM UTC-5, Michael Klishin wrote: Bridget: Are there any other Clojure projects that are doing this? Some ClojureWerkz [1] projects do, and eventually all key ones will. 1. http://clojurewerkz.org MK That's excellent. One thought is to create and publish a list of open source Clojure projects that tag newcomer issues to encourage involvement. I can create something new, but maybe it makes sense to do this under an existing project. ClojureWerkz seems pretty close to that type of thing. Just a thought. You can contact me off-list if you're interested in talking about it. Bridget -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Helping newcomers get involved in Clojure projects
+1 to this concept. Also, I don't live near a ClojureBridge workshop, or user groups. One thing I've been arranging is pair programming sessions, which may turn into something for helping folks meet each other and work on interesting stuff. But, it's a different approach. On Apr 11, 2014, at 1:07 PM, Erlis Vidal er...@erlisvidal.com wrote: Anyone doing something about this? I would like to start contributing to some OSS it's the only chance I'll have to use clojure in something useful, I don't have the privilege to use it at work but I really don't know where to start. On Wed, Jan 29, 2014 at 3:49 PM, Bridget bridget.hill...@gmail.com wrote: On Monday, January 27, 2014 9:35:17 AM UTC-5, Michael Klishin wrote: Bridget: Are there any other Clojure projects that are doing this? Some ClojureWerkz [1] projects do, and eventually all key ones will. 1. http://clojurewerkz.org MK That's excellent. One thought is to create and publish a list of open source Clojure projects that tag newcomer issues to encourage involvement. I can create something new, but maybe it makes sense to do this under an existing project. ClojureWerkz seems pretty close to that type of thing. Just a thought. You can contact me off-list if you're interested in talking about it. Bridget -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. Best, Marcus Marcus Blankenship \\\ Problem Solver, Linear Thinker \\\ 541.805.2736 \ @justzeros \ skype:marcuscreo -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Uberjar woes
Clout doesn't depend on any protocols in Clojure. The only protocol it uses is defined within the clout.core namespace itself. Problems like this are often caused by compiled class files on your classpath. Often they are in the target directory, which can be solved by a lein clean. The :clean-non-project-files option being set to false in Josh's configuration looks very suspicious! I've also had problems with class files being accidentally included in the jars of dependencies. In rare cases a dependency may contain class files from other projects, and because class files outrank clj source files, you end up with some pretty bizarre behaviour in such cases. - James On 11 April 2014 22:09, Tom Connors t.v.conn...@gmail.com wrote: Hi Josh, My solution ended up being pretty lame: I stopped calling a function from clout, and the uberjar magically worked, as disappointing as that explanation is. As far as I could tell, the root cause of my problem was that clout depends on an old version of clojure (1.2, if I recall correctly) that defined a protocol that no longer exists in newer versions. It doesn't look to me like you're getting the error for the same reason. Have you tried the standard things, like blow away the target directory and make sure you've required the ns before using its vars? How about.. and I hate this idea too... one by one, remove dependencies + code that uses them, and see if you can get a working jar? When you do manage to figure this out, please post back here, as I'd like to understand this error better (it sure is annoying, huh?). On Thursday, February 27, 2014 2:49:38 PM UTC-5, Tom Connors wrote: Hi Everyone, I've been having trouble creating an uberjar of a project and I'm hoping someone here can point me toward a solution. After cleaning out the target directory (with lein clean) and preprocessing my cljx, I can run the project with no trouble using lein repl and lein run. I can package up the project (lein with-profile prd uberjar) and get the resultant jar files. After that, the trouble starts. Running the jar (java -jar my-standalone.jar) fails with a NoClassDefFoundError error, pointing at a protocol defined in weaverjester's clout - https://github.com/weavejester/cloutclout/core/Route. I highly doubt clout actually has anything to do with the problem. After creating the uberjar, I can no longer run the project with lein run or lein repl - I get the same error, and I can't do anything with lein without getting that error until I remove the target directory. I've inspected the jar and can see that it contains clout, but just clout/core.clj - no .class files. I edited clout's project.clj to include :aot :all, packaged it into a jar, replaced the clout jar in my local maven repo with that new jar, and re-packaged my project. At this point, when I ran the jar, I got another NoClassDefFoundError, this time pointing at another protocol, but this one from clojure.core: clojure/lang/ILookupHost. I've been having this problem with the latest leiningen (2.3.4) and 2.2.0. I've been futzing with my project.clj for some time, but to no avail. Any help greatly appreciated. -Tom -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[ANN] lein-fruit 0.2.0
This is a new release of [lein-fruit](https://github.com/oakes/lein-fruit), a Leiningen plugin for building iOS apps in Clojure. It does this by using [RoboVM](http://www.robovm.org/), a bytecode-to-native translator. The template in this version offers a huge improvement over the past versions. Due to an issue with Clojure's import behaviorhttp://dev.clojure.org/jira/browse/CLJ-1315, the only way to use the iOS wrapper classes was through reflection, which made for some very awkward code. Happily, there is a patch available for this issue thanks to Aaron Cohen and Colin Fleming. I applied it to Clojure 1.6 and uploaded the fork to Clojars, so now lein-fruit's built-in templatehttps://github.com/oakes/lein-fruit/blob/master/src/leiningen/new/ios_clojure/core.cljcan access these classes the normal way. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Advice for building backend REST services from scratch using clojure
Play around with this: $ lein new compojure myapp $ cd myapp $ lein ring server-headless Started server on port 3000 On Thursday, April 10, 2014 9:13:19 AM UTC-5, Kashyap CK wrote: Hi, I have the opportunity to build a set of services from scratch. I plan to use clojure for this. I'd like to experiment with options available out there - options such as - what webserver, what database etc. I'd like it very much if you could share some of your experiences in this and possibly some pitfalls to avoid. Regards, Kashyap -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Uberjar woes
I've come up with a fix after lots of fiddling, and I cannot quite explain it -- but it works! The component library involves creating records that implement the Lifecycle protocol. In every namespace where I implemented that protocol, I added a (:gen-class) to the namespace declaration. I also had a *user*namespace for development that used required the component library. I moved this into the project itself also: (ns user) - (ns fmspider.user). Finally, I switched back and forth between having :clean-non-project-files set to true and false -- the only thing that worked was having it set to *false*. Every time I build, I always start with lein clean to be sure. Still not quite sure why it is that things worked this way, or if some other combination of the above would yield the same result. On Friday, April 11, 2014 2:18:27 PM UTC-7, James Reeves wrote: Clout doesn't depend on any protocols in Clojure. The only protocol it uses is defined within the clout.core namespace itself. Problems like this are often caused by compiled class files on your classpath. Often they are in the target directory, which can be solved by a lein clean. The :clean-non-project-files option being set to false in Josh's configuration looks very suspicious! I've also had problems with class files being accidentally included in the jars of dependencies. In rare cases a dependency may contain class files from other projects, and because class files outrank clj source files, you end up with some pretty bizarre behaviour in such cases. - James On 11 April 2014 22:09, Tom Connors t.v.c...@gmail.com javascript:wrote: Hi Josh, My solution ended up being pretty lame: I stopped calling a function from clout, and the uberjar magically worked, as disappointing as that explanation is. As far as I could tell, the root cause of my problem was that clout depends on an old version of clojure (1.2, if I recall correctly) that defined a protocol that no longer exists in newer versions. It doesn't look to me like you're getting the error for the same reason. Have you tried the standard things, like blow away the target directory and make sure you've required the ns before using its vars? How about.. and I hate this idea too... one by one, remove dependencies + code that uses them, and see if you can get a working jar? When you do manage to figure this out, please post back here, as I'd like to understand this error better (it sure is annoying, huh?). On Thursday, February 27, 2014 2:49:38 PM UTC-5, Tom Connors wrote: Hi Everyone, I've been having trouble creating an uberjar of a project and I'm hoping someone here can point me toward a solution. After cleaning out the target directory (with lein clean) and preprocessing my cljx, I can run the project with no trouble using lein repl and lein run. I can package up the project (lein with-profile prd uberjar) and get the resultant jar files. After that, the trouble starts. Running the jar (java -jar my-standalone.jar) fails with a NoClassDefFoundError error, pointing at a protocol defined in weaverjester's clout - https://github.com/weavejester/cloutclout/core/Route. I highly doubt clout actually has anything to do with the problem. After creating the uberjar, I can no longer run the project with lein run or lein repl - I get the same error, and I can't do anything with lein without getting that error until I remove the target directory. I've inspected the jar and can see that it contains clout, but just clout/core.clj - no .class files. I edited clout's project.clj to include :aot :all, packaged it into a jar, replaced the clout jar in my local maven repo with that new jar, and re-packaged my project. At this point, when I ran the jar, I got another NoClassDefFoundError, this time pointing at another protocol, but this one from clojure.core: clojure/lang/ILookupHost. I've been having this problem with the latest leiningen (2.3.4) and 2.2.0. I've been futzing with my project.clj for some time, but to no avail. Any help greatly appreciated. -Tom -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com javascript: For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com javascript:. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to
