Re: how does tomcat store session objects?
Have you built the Tomcat source javadoc tree? Maybe you don't want to wade knee-deep in source...understandable, I guess. But at least build yourself the javadoc from the sources and read that stuff. Also see the high-level architecture image (or maybe pdf?) on the jakarta site. fillup Can someone tell me how tomcat stores session objects or at least where I could find out this info without looking at the src? without looking at the source? why not? it's Free, and it's the most authoritative answer you can get. Hi, Maybe I just feel like getting someone else's opinion. Because, where reading the src is excellent excercise, you may not find what the general policies are regarding any particular feature. What you will get is a precise picture of what the product does at that specific point in time(or for that specific version). I am trying to establish the broad policies of a servlet engine implementation - the reference implementation. If one was going to produce a document which introduced the product's features I would expect to find this kind of information in it. So if the servlet spec is a bit vague perhaps the document might mention a few implementation details. Not an all-out volume of commentry - just the general approach taken. Seeing as tomcat has undergone a fair bit of development and has been subjected to some structural changes between recent releases(i.e. 3.x vs 4.0), I thought my first port of call might be to find a long suffering fellow tomcat-user who may have passed on a few helpful hints or his/her take on the big picture (or part thereof, even) - just because he can. Can someone point me to a reference / tech article or discussion? Does anyone know whether or not the way the session management is handled by tomcat has changed in any major way? Are there any caveats to accessing session objects from multiple simultaneous requests? The way this is implementated in the reference implementation (between specs) I would have thought would be documented somewhere other than in the src code. Regards Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: how does tomcat store session objects?
I just quickly checked the site and there are also a couple of tomcat internals articles and the full javadoc for Tomcat 4 is already posted there as well. /f/ -- Have you built the Tomcat source javadoc tree? Maybe you don't want to wade knee-deep in source...understandable, I guess. But at least build yourself the javadoc from the sources and read that stuff. Also see the high-level architecture image (or maybe pdf?) on the jakarta site. fillup Can someone tell me how tomcat stores session objects or at least where I could find out this info without looking at the src? without looking at the source? why not? it's Free, and it's the most authoritative answer you can get. Hi, Maybe I just feel like getting someone else's opinion. Because, where reading the src is excellent excercise, you may not find what the general policies are regarding any particular feature. What you will get is a precise picture of what the product does at that specific point in time(or for that specific version). I am trying to establish the broad policies of a servlet engine implementation - the reference implementation. If one was going to produce a document which introduced the product's features I would expect to find this kind of information in it. So if the servlet spec is a bit vague perhaps the document might mention a few implementation details. Not an all-out volume of commentry - just the general approach taken. Seeing as tomcat has undergone a fair bit of development and has been subjected to some structural changes between recent releases(i.e. 3.x vs 4.0), I thought my first port of call might be to find a long suffering fellow tomcat-user who may have passed on a few helpful hints or his/her take on the big picture (or part thereof, even) - just because he can. Can someone point me to a reference / tech article or discussion? Does anyone know whether or not the way the session management is handled by tomcat has changed in any major way? Are there any caveats to accessing session objects from multiple simultaneous requests? The way this is implementated in the reference implementation (between specs) I would have thought would be documented somewhere other than in the src code. Regards Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: how does tomcat store session objects?
Phillip Morelock wrote: I just quickly checked the site and there are also a couple of tomcat internals articles and the full javadoc for Tomcat 4 is already posted there as well. /f/ -- Have you built the Tomcat source javadoc tree? Maybe you don't want to wade knee-deep in source...understandable, I guess. But at least build yourself the javadoc from the sources and read that stuff. Also see the high-level architecture image (or maybe pdf?) on the jakarta site. fillup Can someone tell me how tomcat stores session objects or at least where I could find out this info without looking at the src? without looking at the source? why not? it's Free, and it's the most authoritative answer you can get. Hi, Maybe I just feel like getting someone else's opinion. Because, where reading the src is excellent excercise, you may not find what the general policies are regarding any particular feature. What you will get is a precise picture of what the product does at that specific point in time(or for that specific version). I am trying to establish the broad policies of a servlet engine implementation - the reference implementation. If one was going to produce a document which introduced the product's features I would expect to find this kind of information in it. So if the servlet spec is a bit vague perhaps the document might mention a few implementation details. Not an all-out volume of commentry - just the general approach taken. Seeing as tomcat has undergone a fair bit of development and has been subjected to some structural changes between recent releases(i.e. 3.x vs 4.0), I thought my first port of call might be to find a long suffering fellow tomcat-user who may have passed on a few helpful hints or his/her take on the big picture (or part thereof, even) - just because he can. Can someone point me to a reference / tech article or discussion? Does anyone know whether or not the way the session management is handled by tomcat has changed in any major way? Are there any caveats to accessing session objects from multiple simultaneous requests? The way this is implementated in the reference implementation (between specs) I would have thought would be documented somewhere other than in the src code. Regards Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] Thanks for that, Phillip. I have downloaded the src-dist for both 3 and 4 versions but have not yet genned the javadoc - I'll do that when I've looked at the catalina docs. I was hoping there may be docs prior to tc4 (we are currently on 3.3) but that is a big help nevertheless. I guess its likely I'll find out soon the extent of the rewrite. Cheers Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: how does tomcat store session objects?
Phillip Morelock wrote: On the TC 3 documentation page there is an excellent tomcat internals documentbut maybe you already saw that? I myself am a big TC 3 user as well, most of my stuff still runs on that. fillup On 5/26/02 4:11 AM, jfc100 [EMAIL PROTECTED] wrote: Phillip Morelock wrote: I just quickly checked the site and there are also a couple of tomcat internals articles and the full javadoc for Tomcat 4 is already posted there as well. /f/ -- Have you built the Tomcat source javadoc tree? Maybe you don't want to wade knee-deep in source...understandable, I guess. But at least build yourself the javadoc from the sources and read that stuff. Also see the high-level architecture image (or maybe pdf?) on the jakarta site. fillup Can someone tell me how tomcat stores session objects or at least where I could find out this info without looking at the src? without looking at the source? why not? it's Free, and it's the most authoritative answer you can get. Hi, Maybe I just feel like getting someone else's opinion. Because, where reading the src is excellent excercise, you may not find what the general policies are regarding any particular feature. What you will get is a precise picture of what the product does at that specific point in time(or for that specific version). I am trying to establish the broad policies of a servlet engine implementation - the reference implementation. If one was going to produce a document which introduced the product's features I would expect to find this kind of information in it. So if the servlet spec is a bit vague perhaps the document might mention a few implementation details. Not an all-out volume of commentry - just the general approach taken. Seeing as tomcat has undergone a fair bit of development and has been subjected to some structural changes between recent releases(i.e. 3.x vs 4.0), I thought my first port of call might be to find a long suffering fellow tomcat-user who may have passed on a few helpful hints or his/her take on the big picture (or part thereof, even) - just because he can. Can someone point me to a reference / tech article or discussion? Does anyone know whether or not the way the session management is handled by tomcat has changed in any major way? Are there any caveats to accessing session objects from multiple simultaneous requests? The way this is implementated in the reference implementation (between specs) I would have thought would be documented somewhere other than in the src code. Regards Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] Thanks for that, Phillip. I have downloaded the src-dist for both 3 and 4 versions but have not yet genned the javadoc - I'll do that when I've looked at the catalina docs. I was hoping there may be docs prior to tc4 (we are currently on 3.3) but that is a big help nevertheless. I guess its likely I'll find out soon the extent of the rewrite. Cheers Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] yes I briefly looked at it but didn't on the initial parse find anything on session management. From what I can gather, there is no synchronization provided by tomcat when it comes to accessing sessions or session contents. Maybe accessing sessions is a bit of a red herring since we are talking about concurrent access within a single session. Whichever data structure tc uses for storing the session objects (or facades) would probably answer that one. Hastable is synced while HashMap anf the others are not. thanks for your input fillup! joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: how does tomcat store session objects?
All I really meant about getting started with the docs, etc., is that it might make any source-wading easier. When I first looked at Tomcat source I was quite lost, but when I went through all of the available architecture stuff, I was then able to very easily drill into the source and find answers to just exactly the type of question you're asking (is it a hash map or a hashtable, or some other type of data structure, etc., Oh, THAT's what they mean by interceptor...). As a side note, I have always believed (from available literature) that most web-app environments (java, asp, php, or otherwise) provide no synchronization/protection of any kind for global object scopes (session, application, etc.), and that it is assumed that you treat these entities as entirely thread-unsafe, unless you serialize your own behavior. Of course, I could be wrong, but that's the impression I have always gotten across all the environments I've worked in (which isn't everything under the sun, but it's plenty of stuff). That's also why it's generally a good idea to absolutely minimize the amount of stuff jammed into a session or application scope...gives you less undefined behavior to debug. Sounds like you are already familiar with all this, though. cheers and good luck fillup On 5/26/02 1:23 PM, jfc100 [EMAIL PROTECTED] wrote: Phillip Morelock wrote: On the TC 3 documentation page there is an excellent tomcat internals documentbut maybe you already saw that? I myself am a big TC 3 user as well, most of my stuff still runs on that. fillup On 5/26/02 4:11 AM, jfc100 [EMAIL PROTECTED] wrote: Phillip Morelock wrote: I just quickly checked the site and there are also a couple of tomcat internals articles and the full javadoc for Tomcat 4 is already posted there as well. /f/ -- Have you built the Tomcat source javadoc tree? Maybe you don't want to wade knee-deep in source...understandable, I guess. But at least build yourself the javadoc from the sources and read that stuff. Also see the high-level architecture image (or maybe pdf?) on the jakarta site. fillup Can someone tell me how tomcat stores session objects or at least where I could find out this info without looking at the src? without looking at the source? why not? it's Free, and it's the most authoritative answer you can get. Hi, Maybe I just feel like getting someone else's opinion. Because, where reading the src is excellent excercise, you may not find what the general policies are regarding any particular feature. What you will get is a precise picture of what the product does at that specific point in time(or for that specific version). I am trying to establish the broad policies of a servlet engine implementation - the reference implementation. If one was going to produce a document which introduced the product's features I would expect to find this kind of information in it. So if the servlet spec is a bit vague perhaps the document might mention a few implementation details. Not an all-out volume of commentry - just the general approach taken. Seeing as tomcat has undergone a fair bit of development and has been subjected to some structural changes between recent releases(i.e. 3.x vs 4.0), I thought my first port of call might be to find a long suffering fellow tomcat-user who may have passed on a few helpful hints or his/her take on the big picture (or part thereof, even) - just because he can. Can someone point me to a reference / tech article or discussion? Does anyone know whether or not the way the session management is handled by tomcat has changed in any major way? Are there any caveats to accessing session objects from multiple simultaneous requests? The way this is implementated in the reference implementation (between specs) I would have thought would be documented somewhere other than in the src code. Regards Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] Thanks for that, Phillip. I have downloaded the src-dist for both 3 and 4 versions but have not yet genned the javadoc - I'll do that when I've looked at the catalina docs. I was hoping there may be docs prior to tc4 (we are currently on 3.3) but that is a big help nevertheless. I guess its likely I'll find out soon the extent of the rewrite. Cheers Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] yes I briefly looked at it but didn't on the initial parse find anything on session management. From what I can gather, there is no synchronization provided by tomcat when it comes to accessing sessions or session contents. Maybe accessing sessions is a bit of a red herring since we are talking about concurrent
Re: how does tomcat store session objects?
Thanks! joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
how does tomcat store session objects?
Hi, Can someone tell me how tomcat stores session objects or at least where I could find out this info without looking at the src? Thanks Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: how does tomcat store session objects?
On 5/25/02 6:20 AM, jfc100 [EMAIL PROTECTED] wrote: Can someone tell me how tomcat stores session objects or at least where I could find out this info without looking at the src? without looking at the source? why not? it's Free, and it's the most authoritative answer you can get. Thanks Joe fillup -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: how does tomcat store session objects?
Phillip Morelock wrote: On 5/25/02 6:20 AM, jfc100 [EMAIL PROTECTED] wrote: Can someone tell me how tomcat stores session objects or at least where I could find out this info without looking at the src? without looking at the source? why not? it's Free, and it's the most authoritative answer you can get. Thanks Joe fillup -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] Hi, Maybe I just feel like getting someone else's opinion. Because, where reading the src is excellent excercise, you may not find what the general policies are regarding any particular feature. What you will get is a precise picture of what the product does at that specific point in time(or for that specific version). I am trying to establish the broad policies of a servlet engine implementation - the reference implementation. If one was going to produce a document which introduced the product's features I would expect to find this kind of information in it. So if the servlet spec is a bit vague perhaps the document might mention a few implementation details. Not an all-out volume of commentry - just the general approach taken. Seeing as tomcat has undergone a fair bit of development and has been subjected to some structural changes between recent releases(i.e. 3.x vs 4.0), I thought my first port of call might be to find a long suffering fellow tomcat-user who may have passed on a few helpful hints or his/her take on the big picture (or part thereof, even) - just because he can. Can someone point me to a reference / tech article or discussion? Does anyone know whether or not the way the session management is handled by tomcat has changed in any major way? Are there any caveats to accessing session objects from multiple simultaneous requests? The way this is implementated in the reference implementation (between specs) I would have thought would be documented somewhere other than in the src code. Regards Joe -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
