I've worked on a quite outdated version of Flink for a while now and rebased my code to the latest master on Friday. Back at home, I wanted to continue my work and found that it is very difficult to properly set up the latest eclipse for Flink.
What I've done so far: - Downloaded Eclipse Luna SR1 (for linux) - Installed Scala IDE 4.0 nightly - add the -clean flag to the eclipse.ini, because eclipse is not starting anymore due to a bug - installed some missing m2e connectors - Set the Scala compiler to 2.10 (thats a new feature in Scala IDE) (See: http://scala-ide.org/blog/scala-installations.html) Now, all the tests in flink-scala/src/test are mostly about this: could not find implicit value for evidence parameter of type org.apache.flink.api.common.typeinfo.TypeInformation[(Array[String],)]; /flink-scala/src/test/scala/org/apache/flink/api/scala/runtime It seems that the flink-tests project is calling Scala examples for testing purposes. So if the flink-scala project is not building, its blocking flink-tests from building. Any ideas? If you are wondering why I'm not switching to IntelliJ: It is currently not possible to deactivate a maven build profile that is activated by default, so I'm not able to properly work on the "flink-yarn" project with IntelliJ (the respective issue has been closed at IntelliJ, so I guess the next release will contain the fix). In addition, I think its good if at least a few core developers make sure that Flink is also "developable" using Eclipse. On Sun, Sep 14, 2014 at 12:48 PM, Márton Balassi <balassi.mar...@gmail.com> wrote: > Answer posted to "Example packages naming convention" thread as the issue > diverged from this topic. > > On Sun, Sep 14, 2014 at 11:14 AM, Kostas Tzoumas <ktzou...@apache.org> > wrote: > > > Good catch, I suggest to use examples > > > > On Sat, Sep 13, 2014 at 3:27 PM, Márton Balassi < > balassi.mar...@gmail.com> > > wrote: > > > > > Pull request issued. One minor naming concern: > > > > > > As of today the scala examples are located at > > > the org.apache.flink.examples.scala package, while the java ones in > > > the org.apache.flink.example.java. I suggest using only one convention > > for > > > this either example or examples. > > > > > > Cheers, > > > > > > Marton > > > > > > On Fri, Sep 12, 2014 at 9:17 PM, Márton Balassi < > > balassi.mar...@gmail.com> > > > wrote: > > > > > > > Sorry for being a bit silent after already bidding on LR. The pull > > > request > > > > is coming soon. > > > > > > > > On Fri, Sep 12, 2014 at 6:25 PM, Stephan Ewen <se...@apache.org> > > wrote: > > > > > > > >> I suppose that having the option between simple return type, and a > > > >> collector is the easiest to understand. > > > >> Am 12.09.2014 16:50 schrieb "Aljoscha Krettek" < > aljos...@apache.org > > >: > > > >> > > > >> > So, should I change join and coGroup to have a simple return > value, > > no > > > >> > Option or Collection? Also what's happening with the relational > > > >> > examples and the LinearRegression examples? I'd like to make a > pull > > > >> > request before this weekend. > > > >> > > > > >> > I also added a test that checks whether the Scala API has the same > > > >> > methods as the Java API (ScalaAPICompletenessTest). > > > >> > > > > >> > On Fri, Sep 12, 2014 at 4:00 PM, Aljoscha Krettek < > > > aljos...@apache.org> > > > >> > wrote: > > > >> > > Yes, there is already a Collector version, you can do: > > > >> > > > > > >> > > left.join(right).where("foo").equalTo("bar") { > > > >> > > (left, right, out: Collector[Page]) => > > > >> > > if (...) out.collect(...) > > > >> > > } > > > >> > > > > > >> > > I wasn't sure on what our Function2 variant should be. That's > why > > I > > > >> > > asked. There are some cases where you want to have the option > (pun > > > >> > > intended) of either returning something from a join or not. But > > you > > > >> > > could also use a filter after the join. It's a preference > thing, I > > > >> > > suppose. > > > >> > > > > > >> > > On Fri, Sep 12, 2014 at 2:43 PM, Stephan Ewen <se...@apache.org > > > > > >> wrote: > > > >> > >> I think it seems weird that normal joins need to go through > > option. > > > >> > >> > > > >> > >> The option variant is to allow filters in the join function. > > > >> Wouldn't a > > > >> > >> collector variant allow you to do the same, and would be > > function3 > > > ? > > > >> I > > > >> > know > > > >> > >> that option reads more functionally... > > > >> > >> > > > >> > >> > > > >> > >> > > > >> > >> Am 12.09.2014 14:24 schrieb "Aljoscha Krettek" < > > > aljos...@apache.org > > > >> >: > > > >> > >>> > > > >> > >>> 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 < > > se...@apache.org> > > > >> > 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 < > > > >> fhue...@apache.org> > > > >> > >> wrote: > > > >> > >>> > > > > >> > >>> >> Sweet! I'm lovin' this :-) > > > >> > >>> >> > > > >> > >>> >> 2014-09-12 11:46 GMT+02:00 Aljoscha Krettek < > > > aljos...@apache.org > > > >> >: > > > >> > >>> >> > > > >> > >>> >> > 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 < > > > >> > >> aljos...@apache.org> > > > >> > >>> >> > 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 < > > > >> > >> aljos...@apache.org > > > >> > >>> >> > > > > >> > >>> >> > 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 < > > > >> > >> fhue...@apache.org> > > > >> > >>> >> > 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 < > > > >> > aljos...@apache.org > > > >> > >>>: > > > >> > >>> >> > >>> > > > >> > >>> >> > >>>> 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 < > > > >> > >> fhue...@apache.org > > > >> > >>> >> > > > > >> > >>> >> > >>>> 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 < > > > >> > >> aljos...@apache.org > > > >> > >>> >> >: > > > >> > >>> >> > >>>> > > > > >> > >>> >> > >>>> >> 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 < > > > >> > >>> >> > aljos...@apache.org> > > > >> > >>> >> > >>>> >> 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 > < > > > >> > >>> >> > fhue...@apache.org> > > > >> > >>> >> > >>>> >> 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 < > > > >> > >>> >> > aljos...@apache.org>: > > > >> > >>> >> > >>>> >> >> > > > >> > >>> >> > >>>> >> >>> 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 < > > > >> > >>> >> > se...@apache.org> > > > >> > >>> >> > >>>> >> wrote: > > > >> > >>> >> > >>>> >> >>> > +1 for removing RelationQuery > > > >> > >>> >> > >>>> >> >>> > > > > >> > >>> >> > >>>> >> >>> > On Thu, Sep 11, 2014 at 3:04 PM, Aljoscha > > > >> Krettek < > > > >> > >>> >> > >>>> >> aljos...@apache.org> > > > >> > >>> >> > >>>> >> >>> > 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 > > > >> > < > > > >> > >>> >> > >>>> >> aljos...@apache.org > > > >> > >>> >> > >>>> >> >>> > > > > >> > >>> >> > >>>> >> >>> >> 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 < > > > >> > >>> >> > >>>> >> >>> aljos...@apache.org> > > > >> > >>> >> > >>>> >> >>> >> 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 > > > >> > < > > > >> > >>> >> > >>>> >> ktzou...@apache.org > > > >> > >>> >> > >>>> >> >>> > > > > >> > >>> >> > >>>> >> >>> >> 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 > > > >> > < > > > >> > >>> >> > >>>> >> ktzou...@apache.org > > > >> > >>> >> > >>>> >> >>> > > > > >> > >>> >> > >>>> >> >>> >> 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 > > > >> > >> < > > > >> > >>> >> > >>>> >> >>> aljos...@apache.org > > > >> > >>> >> > >>>> >> >>> >> > > > > >> > >>> >> > >>>> >> >>> >> >>>> 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 < > > > >> > >>> >> > >>>> >> >>> ktzou...@apache.org> > > > >> > >>> >> > >>>> >> >>> >> >>>>> 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 < > > > >> > >>> >> > >>>> >> >>> >> aljos...@apache.org> > > > >> > >>> >> > >>>> >> >>> >> >>>>> > wrote: > > > >> > >>> >> > >>>> >> >>> >> >>>>> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> I added the ConnectedComponents > > > Example > > > >> > from > > > >> > >>> >> Vasia. > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> Keep 'em coming, people. :D > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> On Mon, Sep 8, 2014 at 6:07 PM, > > > Fabian > > > >> > >> Hueske < > > > >> > >>> >> > >>>> >> >>> fhue...@apache.org > > > >> > >>> >> > >>>> >> >>> >> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> wrote: > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> > Alright, will do. > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> > Thanks! > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> > 2014-09-08 17:48 GMT+02:00 > > Aljoscha > > > >> > >> Krettek < > > > >> > >>> >> > >>>> >> >>> >> aljos...@apache.org>: > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> 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 > > > >> > >>> >> < > > > >> > >>> >> > >>>> >> >>> >> fhue...@apache.org> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> 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 > > > >> > >> < > > > >> > >>> >> > >>>> >> se...@apache.org > > > >> > >>> >> > >>>> >> >>> >: > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> 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 > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> <fhue...@apache.org> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> 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 > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > <aljos...@apache.org>: > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > 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 > > > >> > >>> >> > >>>> >> < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> aljos...@apache.org> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > 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 > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > < > > > vasilikikala...@gmail.com > > > >> > > > > >> > >> 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 < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> aljos...@apache.org > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > 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 < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> reckone...@gmail.com > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> wrote: > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > +1 > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > > ComputeEdgeDegrees > > > for > > > >> me! > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > On Fri, Sep 5, > 2014 > > > at > > > >> > 11:44 > > > >> > >> AM, > > > >> > >>> >> > Márton > > > >> > >>> >> > >>>> >> >>> Balassi < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > > > balassi.mar...@gmail.com > > > >> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > wrote: > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> +1 > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > BatchGradientDescent > > > >> for > > > >> > me > > > >> > >> :) > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> On Fri, Sep 5, > > 2014 > > > at > > > >> > >> 11:15 AM, > > > >> > >>> >> > Kostas > > > >> > >>> >> > >>>> >> >>> Tzoumas < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > ktzou...@apache.org> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> 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 < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> > vasilikikala...@gmail.com> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > wrote: > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > +1 for > having > > > >> other > > > >> > >> people > > > >> > >>> >> > >>>> implement > > > >> > >>> >> > >>>> >> the > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > examples! > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > Connected > > > >> Components > > > >> > and > > > >> > >>> >> > Kmeans for > > > >> > >>> >> > >>>> >> me :) > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > -V. > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > On 4 > September > > > >> 2014 > > > >> > >> 21:03, > > > >> > >>> >> > Fabian > > > >> > >>> >> > >>>> >> Hueske < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> fhue...@apache.org> > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> 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 < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > aljos...@apache.org > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >: > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > Will do, > > > then > > > >> > >> people can > > > >> > >>> >> > >>>> reserve > > > >> > >>> >> > >>>> >> their > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > favourite > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> examples > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > here. > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > On Thu, > > Sep > > > 4, > > > >> > 2014 > > > >> > >> at > > > >> > >>> >> > 8:55 PM, > > > >> > >>> >> > >>>> >> Fabian > > > >> > >>> >> > >>>> >> >>> >> Hueske > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> fhue...@apache.org > > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > 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 > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > < > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > aljos...@apache.org > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >: > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> Hi, > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> I > have > > a > > > >> > working > > > >> > >>> >> > rewrite of > > > >> > >>> >> > >>>> the > > > >> > >>> >> > >>>> >> >>> Scala > > > >> > >>> >> > >>>> >> >>> >> API > > > >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> here: > > > >> > >>> >> > >>>> >> >>> >> >>>>> 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>>> >> > >>>> >> >>> >> >>>> > > > >> > >>> >> > >>>> >> >>> >> >>>> > > > >> > >>> >> > >>>> >> >>> >> >>> > > > >> > >>> >> > >>>> >> >>> >> > > > >> > >>> >> > >>>> >> >>> > > > >> > >>> >> > >>>> >> > > > >> > >>> >> > >>>> > > > >> > >>> >> > > > > >> > >>> >> > > > >> > > > > >> > > > > > > > > > > > > > >
