As already mentioned this is not possible because of type erasure. We can only have one join variant that takes a Function2.
On Fri, Sep 12, 2014 at 12:34 PM, Stephan Ewen <[email protected]> wrote: > It would be nice to have a join variant that directly returns the value > rathern than an option. Why not have both (they are wrapped as flatJoins > anyway below, right?) > > On Fri, Sep 12, 2014 at 11:50 AM, Fabian Hueske <[email protected]> wrote: > >> Sweet! I'm lovin' this :-) >> >> 2014-09-12 11:46 GMT+02:00 Aljoscha Krettek <[email protected]>: >> >> > Also, you can use CaseClasses directly as the type for CSV input. So >> > instead of reading it as tuples and then having a mapper that maps to >> > your case classes you can use: >> > >> > env.readCsv[Edge](...) >> > >> > On Fri, Sep 12, 2014 at 11:43 AM, Aljoscha Krettek <[email protected]> >> > wrote: >> > > I added support for specifying keys by name for CaseClasses. Check out >> > > the PageRank and TriangleEnumeration examples to see it in action. >> > > >> > > @Kostas: I think you could use them for the TPC-H examples. >> > > >> > > On Fri, Sep 12, 2014 at 7:23 AM, Aljoscha Krettek <[email protected] >> > >> > wrote: >> > >> Yes, that would allow list comprehensions. It would be possible to >> > >> have the Collection signature for join (and coGroup), i.e.: >> > >> >> > >> apply[R]((T, O) => TraversableOnce[O]): DataSet[O] >> > >> >> > >> (T and O are the left and right input type, R is result type) >> > >> >> > >> Then you can return collections and still return an option, as in: >> > >> >> > >> a.join(b).where(0).equalTo(0) { (l, r) => if (r > ...) Some(l) else >> > None } >> > >> >> > >> Because there is an implicit conversion from Options to a Collection. >> > >> This will always wrap the return value in a List with only one value. >> > >> I'm not sure we want the overhead here. I'm also not sure whether we >> > >> want the overhead of always having to use an Option even though the >> > >> join always returns a value. >> > >> >> > >> What do you think? >> > >> >> > >> On Thu, Sep 11, 2014 at 11:22 PM, Fabian Hueske <[email protected]> >> > wrote: >> > >>> Hmmm, tricky question... >> > >>> How about the Option for Join as this is a tuple-wise operation and >> the >> > >>> Collection for Cogroup which is group-wise? >> > >>> Could we in that case use list comprehensions in Cogroup functions? >> > >>> >> > >>> Or is that too much mixing? >> > >>> >> > >>> 2014-09-11 23:00 GMT+02:00 Aljoscha Krettek <[email protected]>: >> > >>> >> > >>>> I didn't look at the example either. >> > >>>> >> > >>>> Addings collections is easy, it's just that we can either have >> > >>>> Collections or the Option, not both. >> > >>>> >> > >>>> For the coding style I followed this: >> > >>>> >> > https://cwiki.apache.org/confluence/display/SPARK/Spark+Code+Style+Guide >> , >> > >>>> which itself is based on this: http://docs.scala-lang.org/style/. >> It >> > >>>> is different from the Java Code Guidelines we have in place, yes. >> > >>>> >> > >>>> On Thu, Sep 11, 2014 at 10:10 PM, Fabian Hueske <[email protected] >> > >> > >>>> wrote: >> > >>>> > I haven't looked at the LineRank example in detail, but if you >> > think that >> > >>>> > it adds something new to the examples collection, we can certainly >> > port >> > >>>> it >> > >>>> > also to Java. >> > >>>> > I think the Option and Collector return types are sufficient right >> > now >> > >>>> but >> > >>>> > if Collections are easy to add, go for it. ;-) >> > >>>> > >> > >>>> > Great that the Scala primitives are working! Also thanks for >> adding >> > >>>> > genSequence and adapting my examples. >> > >>>> > Btw. does the codestyle not apply for Scala files or do we have a >> > >>>> different >> > >>>> > there? >> > >>>> > >> > >>>> > 2014-09-11 17:55 GMT+02:00 Aljoscha Krettek <[email protected] >> >: >> > >>>> > >> > >>>> >> What about the LineRank example? We had that in Scala but never >> > had a >> > >>>> >> Java Example. >> > >>>> >> >> > >>>> >> On Thu, Sep 11, 2014 at 5:51 PM, Aljoscha Krettek < >> > [email protected]> >> > >>>> >> wrote: >> > >>>> >> > Yes, I like that. For the ITCases I always just copied the Java >> > >>>> ITCase. >> > >>>> >> > >> > >>>> >> > The only examples that are missing now are LinearRegression and >> > the >> > >>>> >> > relational stuff. >> > >>>> >> > >> > >>>> >> > On Thu, Sep 11, 2014 at 5:48 PM, Fabian Hueske < >> > [email protected]> >> > >>>> >> wrote: >> > >>>> >> >> I just removed the old CountEdgeDegrees example. >> > >>>> >> >> That was a preprocessing step for the TriangleEnumeration, and >> > is now >> > >>>> >> part >> > >>>> >> >> of the new TriangleEnumerationOpt example. >> > >>>> >> >> So I guess, we don't need to port that one. As I said before, >> > I'd >> > >>>> >> prefer to >> > >>>> >> >> keep Java and Scala examples in sync. >> > >>>> >> >> >> > >>>> >> >> Cheers, Fabian >> > >>>> >> >> >> > >>>> >> >> 2014-09-11 17:40 GMT+02:00 Aljoscha Krettek < >> > [email protected]>: >> > >>>> >> >> >> > >>>> >> >>> I added the PageRank example, thanks again fabian. :D >> > >>>> >> >>> >> > >>>> >> >>> Regarding the other stuff: >> > >>>> >> >>> - There is a comment in DataSet.scala about including >> > >>>> >> >>> org.apache.flink.api.scala._ because of the TypeInformation. >> > >>>> >> >>> - I added generateSequence to ExecutionEnvironment. >> > >>>> >> >>> - It is possible to use Scala Primitives in Array, I noticed >> > it >> > >>>> while >> > >>>> >> >>> writing the tests, you probably had an older version of the >> > code. >> > >>>> >> >>> - Yes, using List and other Interfaces is not possible, this >> > is >> > >>>> also >> > >>>> >> >>> a restriction in the Java API. >> > >>>> >> >>> >> > >>>> >> >>> What do you think about the interface of join and coGroup? >> > Right >> > >>>> now, >> > >>>> >> >>> you can either use a lambda that returns an Option or the >> > lambda >> > >>>> with >> > >>>> >> >>> the Collector. Originally I wanted to have also have a lambda >> > that >> > >>>> >> >>> returns a Collection, but due to type erasure this has the >> > same type >> > >>>> >> >>> as the lambda with the Option so I couldn't use it. There is >> an >> > >>>> >> >>> implicit conversion from Option to a Collection, so I could >> > change >> > >>>> it >> > >>>> >> >>> without breaking the examples we have now. What do you think? >> > >>>> >> >>> >> > >>>> >> >>> So far we have ported: WordCount, KMeans, >> ConnectedComponents, >> > >>>> >> >>> WebLogAnalysis, TransitiveClosureNaive, >> > >>>> TriangleEnumerationNaive/Opt, >> > >>>> >> >>> PageRank >> > >>>> >> >>> >> > >>>> >> >>> These are the examples people called dibs on: >> > >>>> >> >>> - BatchGradientDescent (Márton) (Should be a port of >> > >>>> LinearRegression >> > >>>> >> >>> Example from Java) >> > >>>> >> >>> - ComputeEdgeDegrees (Hermann) >> > >>>> >> >>> >> > >>>> >> >>> Those are unclaimed (if I'm not mistaken): >> > >>>> >> >>> - The relational Stuff >> > >>>> >> >>> >> > >>>> >> >>> On Thu, Sep 11, 2014 at 3:06 PM, Stephan Ewen < >> > [email protected]> >> > >>>> >> wrote: >> > >>>> >> >>> > +1 for removing RelationQuery >> > >>>> >> >>> > >> > >>>> >> >>> > On Thu, Sep 11, 2014 at 3:04 PM, Aljoscha Krettek < >> > >>>> >> [email protected]> >> > >>>> >> >>> > wrote: >> > >>>> >> >>> > >> > >>>> >> >>> >> By the way, what was called BatchGradientDescent in the >> > Scala >> > >>>> >> examples >> > >>>> >> >>> >> should be replaced by a port of the LinearRegression >> > Example from >> > >>>> >> >>> >> Java. I had them as two separate examples earlier. >> > >>>> >> >>> >> >> > >>>> >> >>> >> What about RelationalQuery and TPC-H-Q3. Any thoughts >> about >> > >>>> removing >> > >>>> >> >>> >> RelationalQuery? >> > >>>> >> >>> >> >> > >>>> >> >>> >> On Thu, Sep 11, 2014 at 11:43 AM, Aljoscha Krettek < >> > >>>> >> [email protected] >> > >>>> >> >>> > >> > >>>> >> >>> >> wrote: >> > >>>> >> >>> >> > I added the Triangle Enumeration Examples, thanks >> Fabian. >> > >>>> >> >>> >> > >> > >>>> >> >>> >> > So far we have ported: WordCount, KMeans, >> > ConnectedComponents, >> > >>>> >> >>> >> > WebLogAnalysis, TransitiveClosureNaive, >> > >>>> >> TriangleEnumerationNaive/Opt >> > >>>> >> >>> >> > >> > >>>> >> >>> >> > These are the examples people called dibs on: >> > >>>> >> >>> >> > - PageRank (Fabian) >> > >>>> >> >>> >> > - BatchGradientDescent (Márton) >> > >>>> >> >>> >> > - ComputeEdgeDegrees (Hermann) >> > >>>> >> >>> >> > >> > >>>> >> >>> >> > Those are unclaimed (if I'm not mistaken): >> > >>>> >> >>> >> > - The relational Stuff >> > >>>> >> >>> >> > - LinearRegression >> > >>>> >> >>> >> > >> > >>>> >> >>> >> > On Wed, Sep 10, 2014 at 6:04 PM, Aljoscha Krettek < >> > >>>> >> >>> [email protected]> >> > >>>> >> >>> >> wrote: >> > >>>> >> >>> >> >> Thanks, I added it. I'll keep a running list of >> > >>>> ported/unported >> > >>>> >> >>> >> >> examples in my mails. I'll rename the java example >> > package to >> > >>>> >> >>> examples >> > >>>> >> >>> >> >> once the Scala API merge is done. >> > >>>> >> >>> >> >> >> > >>>> >> >>> >> >> I think the termination criterion is fine as it is. >> Just >> > >>>> because >> > >>>> >> >>> Scala >> > >>>> >> >>> >> >> enables functional programming doesn't mean it's always >> > the >> > >>>> best >> > >>>> >> >>> >> >> choice. :D >> > >>>> >> >>> >> >> >> > >>>> >> >>> >> >> So far we have ported: WordCount, KMeans, >> > ConnectedComponents, >> > >>>> >> >>> >> >> WebLogAnalysis, TransitiveClosureNaive >> > >>>> >> >>> >> >> >> > >>>> >> >>> >> >> These are the examples people called dibs on: >> > >>>> >> >>> >> >> - TriangleEnumration and PageRank (Fabian) >> > >>>> >> >>> >> >> - BatchGradientDescent (Márton) >> > >>>> >> >>> >> >> - ComputeEdgeDegrees (Hermann) >> > >>>> >> >>> >> >> >> > >>>> >> >>> >> >> Those are unclaimed (if I'm not mistaken): >> > >>>> >> >>> >> >> - The relational Stuff >> > >>>> >> >>> >> >> - LinearRegression >> > >>>> >> >>> >> >> >> > >>>> >> >>> >> >> Cheers, >> > >>>> >> >>> >> >> Aljoscha >> > >>>> >> >>> >> >> >> > >>>> >> >>> >> >> On Wed, Sep 10, 2014 at 4:23 PM, Kostas Tzoumas < >> > >>>> >> [email protected] >> > >>>> >> >>> > >> > >>>> >> >>> >> wrote: >> > >>>> >> >>> >> >>> Transitive closure here, I also added a termination >> > criterion >> > >>>> >> in the >> > >>>> >> >>> >> Java >> > >>>> >> >>> >> >>> version: >> > >>>> >> >>> >> >> > >>>> https://github.com/ktzoumas/incubator-flink/tree/tc-scala-example >> > >>>> >> >>> >> >>> >> > >>>> >> >>> >> >>> Perhaps you can make the termination criterion in >> Scala >> > more >> > >>>> >> >>> >> functional? >> > >>>> >> >>> >> >>> >> > >>>> >> >>> >> >>> I noticed that the examples package name is >> > example.java but >> > >>>> >> >>> >> examples.scala >> > >>>> >> >>> >> >>> >> > >>>> >> >>> >> >>> Kostas >> > >>>> >> >>> >> >>> >> > >>>> >> >>> >> >>> On Tue, Sep 9, 2014 at 6:12 PM, Kostas Tzoumas < >> > >>>> >> [email protected] >> > >>>> >> >>> > >> > >>>> >> >>> >> wrote: >> > >>>> >> >>> >> >>>> >> > >>>> >> >>> >> >>>> I'll take TransitiveClosure and PiEstimation (was not >> > on >> > >>>> your >> > >>>> >> >>> list). >> > >>>> >> >>> >> >>>> >> > >>>> >> >>> >> >>>> If nobody volunteers for the relational stuff I can >> > take >> > >>>> those >> > >>>> >> as >> > >>>> >> >>> >> well. >> > >>>> >> >>> >> >>>> >> > >>>> >> >>> >> >>>> How about removing the "RelationalQuery" from both >> > Scala and >> > >>>> >> Java? >> > >>>> >> >>> It >> > >>>> >> >>> >> >>>> seems to be a proper subset of TPC-H Q3. Does it add >> > some >> > >>>> >> teaching >> > >>>> >> >>> >> value on >> > >>>> >> >>> >> >>>> top of TPC-H Q3? >> > >>>> >> >>> >> >>>> >> > >>>> >> >>> >> >>>> Kostas >> > >>>> >> >>> >> >>>> >> > >>>> >> >>> >> >>>> On Tue, Sep 9, 2014 at 5:57 PM, Aljoscha Krettek < >> > >>>> >> >>> [email protected] >> > >>>> >> >>> >> > >> > >>>> >> >>> >> >>>> wrote: >> > >>>> >> >>> >> >>>>> >> > >>>> >> >>> >> >>>>> Thanks, I added it, along with an ITCase. >> > >>>> >> >>> >> >>>>> >> > >>>> >> >>> >> >>>>> So far we have ported: WordCount, KMeans, >> > >>>> ConnectedComponents, >> > >>>> >> >>> >> >>>>> WebLogAnalysis >> > >>>> >> >>> >> >>>>> >> > >>>> >> >>> >> >>>>> These are the examples people called dibs on: >> > >>>> >> >>> >> >>>>> - TriangleEnumration and PageRank (Fabian) >> > >>>> >> >>> >> >>>>> - BatchGradientDescent (Márton) >> > >>>> >> >>> >> >>>>> - ComputeEdgeDegrees (Hermann) >> > >>>> >> >>> >> >>>>> >> > >>>> >> >>> >> >>>>> Those are unclaimed (if I'm not mistaken): >> > >>>> >> >>> >> >>>>> - TransitiveClosure >> > >>>> >> >>> >> >>>>> - The relational Stuff >> > >>>> >> >>> >> >>>>> - LinearRegression >> > >>>> >> >>> >> >>>>> >> > >>>> >> >>> >> >>>>> Cheers, >> > >>>> >> >>> >> >>>>> Aljoscha >> > >>>> >> >>> >> >>>>> >> > >>>> >> >>> >> >>>>> On Tue, Sep 9, 2014 at 5:21 PM, Kostas Tzoumas < >> > >>>> >> >>> [email protected]> >> > >>>> >> >>> >> >>>>> wrote: >> > >>>> >> >>> >> >>>>> > WebLog here: >> > >>>> >> >>> >> >>>>> > >> > >>>> >> >>> >> >>>>> > >> > >>>> >> >>> >> >> > >>>> >> >>> >> > >>>> >> >> > >>>> >> > >> https://github.com/ktzoumas/incubator-flink/tree/webloganalysis-example-scala >> > >>>> >> >>> >> >>>>> > >> > >>>> >> >>> >> >>>>> > Do you need any more done? >> > >>>> >> >>> >> >>>>> > >> > >>>> >> >>> >> >>>>> > On Tue, Sep 9, 2014 at 3:08 PM, Aljoscha Krettek < >> > >>>> >> >>> >> [email protected]> >> > >>>> >> >>> >> >>>>> > wrote: >> > >>>> >> >>> >> >>>>> > >> > >>>> >> >>> >> >>>>> >> I added the ConnectedComponents Example from >> Vasia. >> > >>>> >> >>> >> >>>>> >> >> > >>>> >> >>> >> >>>>> >> Keep 'em coming, people. :D >> > >>>> >> >>> >> >>>>> >> >> > >>>> >> >>> >> >>>>> >> On Mon, Sep 8, 2014 at 6:07 PM, Fabian Hueske < >> > >>>> >> >>> [email protected] >> > >>>> >> >>> >> > >> > >>>> >> >>> >> >>>>> >> wrote: >> > >>>> >> >>> >> >>>>> >> > Alright, will do. >> > >>>> >> >>> >> >>>>> >> > Thanks! >> > >>>> >> >>> >> >>>>> >> > >> > >>>> >> >>> >> >>>>> >> > 2014-09-08 17:48 GMT+02:00 Aljoscha Krettek < >> > >>>> >> >>> >> [email protected]>: >> > >>>> >> >>> >> >>>>> >> > >> > >>>> >> >>> >> >>>>> >> >> Ok people, executive decision. :D >> > >>>> >> >>> >> >>>>> >> >> >> > >>>> >> >>> >> >>>>> >> >> Please look at KMeansData.java and >> > KMeans.scala. I'm >> > >>>> >> storing >> > >>>> >> >>> >> the >> > >>>> >> >>> >> >>>>> >> >> data >> > >>>> >> >>> >> >>>>> >> >> in multi-dimensional object arrays and then >> > >>>> converting >> > >>>> >> it to >> > >>>> >> >>> >> the >> > >>>> >> >>> >> >>>>> >> >> required Java or Scala objects. >> > >>>> >> >>> >> >>>>> >> >> >> > >>>> >> >>> >> >>>>> >> >> Also, I changed isEqualTo to equalTo to make >> it >> > >>>> >> consistent >> > >>>> >> >>> >> with the >> > >>>> >> >>> >> >>>>> >> >> Java >> > >>>> >> >>> >> >>>>> >> >> API. >> > >>>> >> >>> >> >>>>> >> >> >> > >>>> >> >>> >> >>>>> >> >> Regarding Join (and coGroup). There is no need >> > for a >> > >>>> >> >>> keyword, >> > >>>> >> >>> >> you >> > >>>> >> >>> >> >>>>> >> >> can >> > >>>> >> >>> >> >>>>> >> >> just write: >> > >>>> >> >>> >> >>>>> >> >> >> > >>>> >> >>> >> >>>>> >> >> left.join(right).where(0).equalTo(1) { (le, >> re) >> > => >> > >>>> new >> > >>>> >> >>> >> MyResult(le, >> > >>>> >> >>> >> >>>>> >> >> re) >> > >>>> >> >>> >> >>>>> >> } >> > >>>> >> >>> >> >>>>> >> >> >> > >>>> >> >>> >> >>>>> >> >> On Mon, Sep 8, 2014 at 2:07 PM, Fabian Hueske >> < >> > >>>> >> >>> >> [email protected]> >> > >>>> >> >>> >> >>>>> >> wrote: >> > >>>> >> >>> >> >>>>> >> >> > Aside from the DataSet issue, I also found >> an >> > >>>> >> >>> inconsistency >> > >>>> >> >>> >> with >> > >>>> >> >>> >> >>>>> >> >> > the >> > >>>> >> >>> >> >>>>> >> Java >> > >>>> >> >>> >> >>>>> >> >> > API. In Java join is done as: >> > >>>> >> >>> >> >>>>> >> >> > >> > >>>> >> >>> >> >>>>> >> >> > ds1.join(ds2).where(...).equalTo(...) >> > >>>> >> >>> >> >>>>> >> >> > >> > >>>> >> >>> >> >>>>> >> >> > where in the current Scala this is: >> > >>>> >> >>> >> >>>>> >> >> > >> > >>>> >> >>> >> >>>>> >> >> > ds1.join(d2).where(...).isEqualTo(...) >> > >>>> >> >>> >> >>>>> >> >> > >> > >>>> >> >>> >> >>>>> >> >> > isEqualTo() should be renamed to equalTo(), >> > IMO. >> > >>>> >> >>> >> >>>>> >> >> > Also, join (+cross and coGroup?) lacks the >> > with() >> > >>>> >> method >> > >>>> >> >>> >> because >> > >>>> >> >>> >> >>>>> >> "with" >> > >>>> >> >>> >> >>>>> >> >> is >> > >>>> >> >>> >> >>>>> >> >> > a keyword in Scala. Should be offer >> something >> > >>>> similar >> > >>>> >> for >> > >>>> >> >>> >> Scala >> > >>>> >> >>> >> >>>>> >> >> > or go >> > >>>> >> >>> >> >>>>> >> >> with >> > >>>> >> >>> >> >>>>> >> >> > map() on Tuple2(left, right)? >> > >>>> >> >>> >> >>>>> >> >> > >> > >>>> >> >>> >> >>>>> >> >> > 2014-09-08 13:51 GMT+02:00 Stephan Ewen < >> > >>>> >> [email protected] >> > >>>> >> >>> >: >> > >>>> >> >>> >> >>>>> >> >> > >> > >>>> >> >>> >> >>>>> >> >> >> Instead of Strings, Object[][] would work >> as >> > well. >> > >>>> >> That >> > >>>> >> >>> is a >> > >>>> >> >>> >> >>>>> >> >> >> generic >> > >>>> >> >>> >> >>>>> >> >> >> representation of a Tuple. >> > >>>> >> >>> >> >>>>> >> >> >> >> > >>>> >> >>> >> >>>>> >> >> >> Alternatively, they could be stored as Java >> > or >> > >>>> Scala >> > >>>> >> >>> Tuples, >> > >>>> >> >>> >> >>>>> >> >> >> with a >> > >>>> >> >>> >> >>>>> >> >> generic >> > >>>> >> >>> >> >>>>> >> >> >> utility method to convert between the two. >> > >>>> >> >>> >> >>>>> >> >> >> >> > >>>> >> >>> >> >>>>> >> >> >> On Mon, Sep 8, 2014 at 10:55 AM, Fabian >> > Hueske >> > >>>> >> >>> >> >>>>> >> >> >> <[email protected]> >> > >>>> >> >>> >> >>>>> >> >> wrote: >> > >>>> >> >>> >> >>>>> >> >> >> >> > >>>> >> >>> >> >>>>> >> >> >> > Yeah, I ran into the same problem... >> > >>>> >> >>> >> >>>>> >> >> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > +1 for using Strings and parsing them, >> but >> > >>>> using >> > >>>> >> the >> > >>>> >> >>> >> >>>>> >> >> >> > CSVFormat >> > >>>> >> >>> >> >>>>> >> won't >> > >>>> >> >>> >> >>>>> >> >> >> work >> > >>>> >> >>> >> >>>>> >> >> >> > because this is based on a >> FileInputFormat. >> > >>>> >> >>> >> >>>>> >> >> >> > So we would need to parse the Strings >> > >>>> manually... >> > >>>> >> >>> >> >>>>> >> >> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > 2014-09-08 10:35 GMT+02:00 Aljoscha >> Krettek >> > >>>> >> >>> >> >>>>> >> >> >> > <[email protected]>: >> > >>>> >> >>> >> >>>>> >> >> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > > Hi, >> > >>>> >> >>> >> >>>>> >> >> >> > > on second thought. Maybe we should just >> > change >> > >>>> >> all >> > >>>> >> >>> the >> > >>>> >> >>> >> >>>>> >> >> >> > > example >> > >>>> >> >>> >> >>>>> >> input >> > >>>> >> >>> >> >>>>> >> >> >> > > data to strings and use CSV input >> > formats in >> > >>>> all >> > >>>> >> the >> > >>>> >> >>> >> >>>>> >> >> >> > > examples. >> > >>>> >> >>> >> >>>>> >> What >> > >>>> >> >>> >> >>>>> >> >> do >> > >>>> >> >>> >> >>>>> >> >> >> > > you think? >> > >>>> >> >>> >> >>>>> >> >> >> > > >> > >>>> >> >>> >> >>>>> >> >> >> > > Cheers, >> > >>>> >> >>> >> >>>>> >> >> >> > > Aljoscha >> > >>>> >> >>> >> >>>>> >> >> >> > > >> > >>>> >> >>> >> >>>>> >> >> >> > > On Mon, Sep 8, 2014 at 7:46 AM, >> Aljoscha >> > >>>> Krettek >> > >>>> >> < >> > >>>> >> >>> >> >>>>> >> >> [email protected]> >> > >>>> >> >>> >> >>>>> >> >> >> > > wrote: >> > >>>> >> >>> >> >>>>> >> >> >> > > > Hi, >> > >>>> >> >>> >> >>>>> >> >> >> > > > yes it's unfortunate that the data >> > types are >> > >>>> >> >>> >> incompatible. >> > >>>> >> >>> >> >>>>> >> >> >> > > > I'm >> > >>>> >> >>> >> >>>>> >> >> afraid >> > >>>> >> >>> >> >>>>> >> >> >> > > > you have to to what you proposed: >> move >> > the >> > >>>> >> data to >> > >>>> >> >>> a >> > >>>> >> >>> >> >>>>> >> >> >> > > > static >> > >>>> >> >>> >> >>>>> >> field >> > >>>> >> >>> >> >>>>> >> >> and >> > >>>> >> >>> >> >>>>> >> >> >> > > > convert it in the >> > getDefaultEdgeDataSet() >> > >>>> >> method in >> > >>>> >> >>> >> Scala. >> > >>>> >> >>> >> >>>>> >> >> >> > > > It's >> > >>>> >> >>> >> >>>>> >> >> not >> > >>>> >> >>> >> >>>>> >> >> >> > > > nice, but copying would duplicate the >> > data >> > >>>> and >> > >>>> >> >>> make it >> > >>>> >> >>> >> >>>>> >> >> >> > > > easier >> > >>>> >> >>> >> >>>>> >> for >> > >>>> >> >>> >> >>>>> >> >> it >> > >>>> >> >>> >> >>>>> >> >> >> > > > to go out of sync in the Java and >> Scala >> > >>>> >> versions. >> > >>>> >> >>> >> >>>>> >> >> >> > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > > What do the others think? This will >> > probably >> > >>>> >> occur >> > >>>> >> >>> in >> > >>>> >> >>> >> all >> > >>>> >> >>> >> >>>>> >> >> >> > > > the >> > >>>> >> >>> >> >>>>> >> >> >> examples. >> > >>>> >> >>> >> >>>>> >> >> >> > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > > Cheers, >> > >>>> >> >>> >> >>>>> >> >> >> > > > Aljoscha >> > >>>> >> >>> >> >>>>> >> >> >> > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > > On Sun, Sep 7, 2014 at 10:04 PM, >> > Vasiliki >> > >>>> >> Kalavri >> > >>>> >> >>> >> >>>>> >> >> >> > > > <[email protected]> wrote: >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Hey, >> > >>>> >> >>> >> >>>>> >> >> >> > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> I have ported the Connected >> Components >> > >>>> >> example, >> > >>>> >> >>> but >> > >>>> >> >>> >> I am >> > >>>> >> >>> >> >>>>> >> >> >> > > >> not >> > >>>> >> >>> >> >>>>> >> sure >> > >>>> >> >>> >> >>>>> >> >> >> how >> > >>>> >> >>> >> >>>>> >> >> >> > to >> > >>>> >> >>> >> >>>>> >> >> >> > > >> reuse the example input data from >> > >>>> >> java-examples. >> > >>>> >> >>> >> >>>>> >> >> >> > > >> In the ConnectedComponentsData >> class, >> > the >> > >>>> >> vertices >> > >>>> >> >>> >> and >> > >>>> >> >>> >> >>>>> >> >> >> > > >> edges >> > >>>> >> >>> >> >>>>> >> data >> > >>>> >> >>> >> >>>>> >> >> >> are >> > >>>> >> >>> >> >>>>> >> >> >> > > >> produced by the methods >> > >>>> >> getDefaultVertexDataSet() >> > >>>> >> >>> >> >>>>> >> >> >> > > >> and getDefaultEdgeDataSet(), which >> > take >> > >>>> >> >>> >> >>>>> >> >> >> > > >> an >> > >>>> >> org.apache.flink.api.java.ExecutionEnvironment >> > >>>> >> >>> as >> > >>>> >> >>> >> >>>>> >> parameter. >> > >>>> >> >>> >> >>>>> >> >> >> > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> One way is to provide public static >> > fields >> > >>>> >> (like >> > >>>> >> >>> in >> > >>>> >> >>> >> the >> > >>>> >> >>> >> >>>>> >> >> >> WordCountData >> > >>>> >> >>> >> >>>>> >> >> >> > > >> class), but this introduces a >> > conversion >> > >>>> >> >>> >> >>>>> >> >> >> > > >> from >> > >>>> org.apache.flink.api.java.tuple.Tuple2 to >> > >>>> >> >>> Scala >> > >>>> >> >>> >> >>>>> >> >> >> > > >> tuple and >> > >>>> >> >>> >> >>>>> >> >> from >> > >>>> >> >>> >> >>>>> >> >> >> > > >> java.lang.Long to scala.Long and I >> > guess >> > >>>> this >> > >>>> >> is >> > >>>> >> >>> an >> > >>>> >> >>> >> >>>>> >> unnecessary >> > >>>> >> >>> >> >>>>> >> >> >> > > complexity >> > >>>> >> >>> >> >>>>> >> >> >> > > >> for an example (?). >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Another way is, of course, to copy >> the >> > >>>> example >> > >>>> >> >>> data >> > >>>> >> >>> >> in >> > >>>> >> >>> >> >>>>> >> >> >> > > >> the >> > >>>> >> >>> >> >>>>> >> Scala >> > >>>> >> >>> >> >>>>> >> >> >> > > example. >> > >>>> >> >>> >> >>>>> >> >> >> > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Am I missing something here? >> > >>>> >> >>> >> >>>>> >> >> >> > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Thanks! >> > >>>> >> >>> >> >>>>> >> >> >> > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Cheers, >> > >>>> >> >>> >> >>>>> >> >> >> > > >> V. >> > >>>> >> >>> >> >>>>> >> >> >> > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> On 5 September 2014 15:52, Aljoscha >> > >>>> Krettek < >> > >>>> >> >>> >> >>>>> >> [email protected] >> > >>>> >> >>> >> >>>>> >> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > > wrote: >> > >>>> >> >>> >> >>>>> >> >> >> > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> Alright, I updated my repo: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > >>>> >> >>> >> >> > https://github.com/aljoscha/incubator-flink/commits/scala-rework >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> This now has a working WordCount >> > example. >> > >>>> >> It's >> > >>>> >> >>> >> pretty >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> much a >> > >>>> >> >>> >> >>>>> >> >> copy >> > >>>> >> >>> >> >>>>> >> >> >> of >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> the Java example with some fixups >> > for the >> > >>>> >> syntax >> > >>>> >> >>> and >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> lambda >> > >>>> >> >>> >> >>>>> >> >> >> > functions. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> You'll also notice that I added the >> > >>>> >> java-examples >> > >>>> >> >>> >> as a >> > >>>> >> >>> >> >>>>> >> >> dependency >> > >>>> >> >>> >> >>>>> >> >> >> for >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> the scala-examples. I did this to >> > reuse >> > >>>> the >> > >>>> >> >>> example >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> input >> > >>>> >> >>> >> >>>>> >> data. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> When you ported a program you can >> do >> > a >> > >>>> pull >> > >>>> >> >>> request >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> against >> > >>>> >> >>> >> >>>>> >> my >> > >>>> >> >>> >> >>>>> >> >> repo >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> and I will collect the examples. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> Happy coding. :D >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> On Fri, Sep 5, 2014 at 12:19 PM, >> > Hermann >> > >>>> >> Gábor < >> > >>>> >> >>> >> >>>>> >> >> >> [email protected] >> > >>>> >> >>> >> >>>>> >> >> >> > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> wrote: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > +1 >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > ComputeEdgeDegrees for me! >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > On Fri, Sep 5, 2014 at 11:44 AM, >> > Márton >> > >>>> >> >>> Balassi < >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> [email protected]> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > wrote: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> +1 >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> BatchGradientDescent for me :) >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> On Fri, Sep 5, 2014 at 11:15 AM, >> > Kostas >> > >>>> >> >>> Tzoumas < >> > >>>> >> >>> >> >>>>> >> >> >> > > [email protected]> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> wrote: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > +1 >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > I go for WebLogAnalysis. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > My experience with Scala >> > consists of >> > >>>> >> going >> > >>>> >> >>> >> through >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > a >> > >>>> >> >>> >> >>>>> >> >> tutorial >> > >>>> >> >>> >> >>>>> >> >> >> so >> > >>>> >> >>> >> >>>>> >> >> >> > > this >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> will >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > be a good stress test both for >> > me and >> > >>>> >> the >> > >>>> >> >>> new >> > >>>> >> >>> >> API >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > :-) >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > On Thu, Sep 4, 2014 at 9:09 >> PM, >> > >>>> Vasiliki >> > >>>> >> >>> >> Kalavri < >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > [email protected]> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > wrote: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > +1 for having other people >> > >>>> implement >> > >>>> >> the >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > examples! >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > Connected Components and >> > Kmeans for >> > >>>> >> me :) >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > -V. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > On 4 September 2014 21:03, >> > Fabian >> > >>>> >> Hueske < >> > >>>> >> >>> >> >>>>> >> >> >> [email protected]> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> wrote: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > I go for >> > TriangleEnumeration and >> > >>>> >> >>> PageRank. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > Let's also do the examples >> > >>>> similar >> > >>>> >> to >> > >>>> >> >>> the >> > >>>> >> >>> >> Java >> > >>>> >> >>> >> >>>>> >> >> examples: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > - running out-of-the-box >> > without >> > >>>> >> >>> parameters >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > - parameters for external >> > data >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > - follow a similar code >> > structure >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > 2014-09-04 20:56 GMT+02:00 >> > >>>> Aljoscha >> > >>>> >> >>> >> Krettek < >> > >>>> >> >>> >> >>>>> >> >> >> > > [email protected] >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > Will do, then people can >> > >>>> reserve >> > >>>> >> their >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > favourite >> > >>>> >> >>> >> >>>>> >> >> >> examples >> > >>>> >> >>> >> >>>>> >> >> >> > > here. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > On Thu, Sep 4, 2014 at >> > 8:55 PM, >> > >>>> >> Fabian >> > >>>> >> >>> >> Hueske >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > < >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> [email protected]> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > wrote: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > Hi, >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > I think having >> examples >> > >>>> >> implemented >> > >>>> >> >>> by >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > different >> > >>>> >> >>> >> >>>>> >> >> >> people >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> proved to >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > be >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > valuable in the past. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > I'd help with two or >> > three >> > >>>> >> examples. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > It might be helpful if >> > you'd >> > >>>> >> port a >> > >>>> >> >>> >> simple >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > first >> > >>>> >> >>> >> >>>>> >> >> one >> > >>>> >> >>> >> >>>>> >> >> >> > such >> > >>>> >> >>> >> >>>>> >> >> >> > > as >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > WordCount. >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > Fabian >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > 2014-09-04 18:47 >> > GMT+02:00 >> > >>>> >> Aljoscha >> > >>>> >> >>> >> Krettek >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > < >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> [email protected] >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> Hi, >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> I have a working >> > rewrite of >> > >>>> the >> > >>>> >> >>> Scala >> > >>>> >> >>> >> API >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> here: >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >> > >>>> >> >>> >> >>>>> >> >> >> >> > >>>> >> >>> >> >> > https://github.com/aljoscha/incubator-flink/commits/scala-rework >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> I'm hoping that I'll >> > only >> > >>>> have >> > >>>> >> to >> > >>>> >> >>> >> write >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> the >> > >>>> >> >>> >> >>>>> >> tests >> > >>>> >> >>> >> >>>>> >> >> and >> > >>>> >> >>> >> >>>>> >> >> >> > > port >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> the >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> examples. Do you >> think >> > it >> > >>>> makes >> > >>>> >> >>> sense >> > >>>> >> >>> >> to >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> let >> > >>>> >> >>> >> >>>>> >> other >> > >>>> >> >>> >> >>>>> >> >> >> > people >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> port >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> the >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> examples, so that >> > someone >> > >>>> else >> > >>>> >> uses >> > >>>> >> >>> >> it and >> > >>>> >> >>> >> >>>>> >> maybe >> > >>>> >> >>> >> >>>>> >> >> >> > notices >> > >>>> >> >>> >> >>>>> >> >> >> > > some >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > quirks >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> in the API? >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> Cheers, >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> Aljoscha >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> > >>>> >> >>> >> >>>>> >> >> >> > >> > >>>> >> >>> >> >>>>> >> >> >> >> > >>>> >> >>> >> >>>>> >> >> >> > >>>> >> >>> >> >>>>> >> >> > >>>> >> >>> >> >>>> >> > >>>> >> >>> >> >>>> >> > >>>> >> >>> >> >>> >> > >>>> >> >>> >> >> > >>>> >> >>> >> > >>>> >> >> > >>>> >> > >>
