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Posted to dev@beam.apache.org by Michael Luckey <ad...@gmail.com> on 2019/05/02 15:33:41 UTC
Re: [Forked] BEAM-4046 (was [PROPOSAL] Introduce beam-sdks-java
gradle project)
Hi,
after implementing the required changes to switch from the current flat
Gradle project structure to the hierarchical represented by the folder
hierarchy I propose to merge the changes [1] after cut of next release
branch (which is scheduled around May, 8th.)
Does anyone have any concerns or objections doing this change (or doing it
now) or can we proceed as suggested? Any questions about this?
Best,
michel
[1] https://github.com/apache/beam/pull/8194
On Thu, Apr 11, 2019 at 1:04 AM Michael Luckey <ad...@gmail.com> wrote:
> To my understanding, that's it, yes. Of course, there might be other
> places/plugins which use plugin.group. But maven coordinates are definitely
> those which need to be consistent.
>
> On Thu, Apr 11, 2019 at 12:57 AM Lukasz Cwik <lc...@google.com> wrote:
>
>> We may be saying the same thing but wanted to be clear that we only need
>> to override the default that publishing plugin uses to always be
>> "org.apache.beam" instead of defaulting to project.group
>>
>> On Wed, Apr 10, 2019 at 3:22 PM Kenneth Knowles <ke...@apache.org> wrote:
>>
>>> So, if we set the "group" on projects only as part of publishing then
>>> everything starts to work? That sounds ideal.
>>>
>>> Kenn
>>>
>>> On Tue, Apr 9, 2019 at 3:49 PM Lukasz Cwik <lc...@google.com> wrote:
>>>
>>>> It would be good if we did as much as possible to make our project as
>>>> much as a conventional Gradle project. It means that more people will be
>>>> familiar with the setup, our setup will likely require less maintenance
>>>> with version bumps in gradle and also that examples/solutions online will
>>>> relate better to our project.
>>>>
>>>> On Mon, Apr 8, 2019 at 6:22 PM Michael Luckey <ad...@gmail.com>
>>>> wrote:
>>>>
>>>>> After playing around, it turns out to be rather straightforward. The
>>>>> problem is not really caused by a Gradle bug, but more by the usual issue
>>>>> that deviating from gradle defaults/conventions often causes headaches.
>>>>>
>>>>> In this case the conflicts are caused by beam eagerly setting
>>>>> project.group for all modules [1]. Of course this implies removing
>>>>> structure and as such causing these name conflicts. I do not think, we need
>>>>> to have that unique group set on our projects. So not globally rewriting,
>>>>> but using the default group (== project.path) resolves this issue. Of
>>>>> course, we then do have to set values accordingly on all places, which
>>>>> default to project.group, where we would like to have our maven group id,
>>>>> e.g. [2]
>>>>>
>>>>> Now before I am going to invest more time for testing, I would like to
>>>>> start the discussion, whether we would like to move to this more
>>>>> hierarchical project representation or prefer to stop here and stay with
>>>>> the current state. If we prefer the current flat structure, we might
>>>>> consider to restructure our folder hierarchy accordingly to ease lookup of
>>>>> the code. At least we need better documentation about the projects and how
>>>>> they relate.
>>>>>
>>>>> Thoughts?
>>>>>
>>>>> [1]
>>>>> https://github.com/apache/beam/blob/master/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L283
>>>>> [2]
>>>>> https://github.com/apache/beam/blob/f9352dc7751c2c35a9189bd405e8a5ef33998b84/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L1001
>>>>>
>>>>> On Wed, Apr 3, 2019 at 5:54 PM Lukasz Cwik <lc...@google.com> wrote:
>>>>>
>>>>>> As a minor point, we do have some cross language dependencies, for
>>>>>> example:
>>>>>> * the portability related proto projects are intended to be consumed
>>>>>> by Go, Java and Python
>>>>>> * the docker container gradle projects contain other applications
>>>>>> (e.g. go boot code) that are placed inside the docker container that
>>>>>> contain the language specific SDK harness. There will likely be additional
>>>>>> applications that are separate from the SDK harness like a docker container
>>>>>> health checker that are placed in there as well
>>>>>>
>>>>>> On Tue, Apr 2, 2019 at 3:21 PM Michael Luckey <ad...@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> agree with Kenn, that this issue at least renders the default
>>>>>>> implementation difficult to use.
>>>>>>>
>>>>>>> Although in the example given, i.e. having sdks/java/core and
>>>>>>> sdks/py/core, I am unsure, whether it will impose a problem.
>>>>>>>
>>>>>>> As far as I understand until now, the issue triggers on dependency
>>>>>>> declaration. These are - in general - expressed with 3 dimensional maven
>>>>>>> coordinates GroupID, artifactID and version. Of course - semantic of
>>>>>>> version is clear - there are only 2 dimension left to distinguish
>>>>>>> artefacts. As we use a single group id (org.apache.beam) there is only one
>>>>>>> dimension left.
>>>>>>>
>>>>>>> Now this does not impose a problem on plain library dependencies. Of
>>>>>>> course they are uniquely defined. But we are using also lots of project
>>>>>>> dependencies. This project dependencies are translated from project path to
>>>>>>> those maven coordinates. Unfortunately here the project name - which
>>>>>>> happens to be the folder name - is used as artefact id. So if folder names
>>>>>>> match, we might get collisions during dependency resolution.
>>>>>>>
>>>>>>> Clearly, it is not possible to deploy artefacts with those same ids
>>>>>>> to any maven rep expecting sensible results. So we do either not deploy an
>>>>>>> artefact from one of these projects - which would kind of strange as we do
>>>>>>> have a project dependency here - or do rewrite the artefact id of (at
>>>>>>> least) one of the colliding projects. ( we currently do that implicitly
>>>>>>> with the project name we create by flattening our structure)
>>>>>>>
>>>>>>> Now back to the given example, as I do not expect any java project
>>>>>>> to have a project dependency on python, there might be a chance, that this
>>>>>>> will just work.
>>>>>>>
>>>>>>> But of course, this does not really help, as we reasonably might
>>>>>>> expect some /runner/direct/core or sdks/java/io/someio/core which would
>>>>>>> collide in the same way.
>>>>>>>
>>>>>>> As a possible workaround here, we could
>>>>>>> - either require unique folder names
>>>>>>> - or rewrite only colliding project names (as we currently do for
>>>>>>> all projects)
>>>>>>> - or ... (do not know yet)
>>>>>>>
>>>>>>> I suggest I ll invest some time playing around improving that
>>>>>>> already prepared PR to support discussion. So that we have proper grounding
>>>>>>> to decide whether a more hierarchical project structure will be worth that
>>>>>>> hassle.
>>>>>>>
>>>>>>> Looking at the gradle issue - which is already 2 yrs old and iirc
>>>>>>> was reported already at least one year earlier - I do not expect a fix here
>>>>>>> soon.
>>>>>>>
>>>>>>> On Tue, Apr 2, 2019 at 7:19 PM Lukasz Cwik <lc...@google.com> wrote:
>>>>>>>
>>>>>>>> I didn't know that https://github.com/gradle/gradle/issues/847 existed
>>>>>>>> but the description of the issues people are having are similar to what was
>>>>>>>> discovered during the gradle migration.
>>>>>>>>
>>>>>>>> On Tue, Apr 2, 2019 at 8:02 AM Jean-Baptiste Onofré <
>>>>>>>> jb@nanthrax.net> wrote:
>>>>>>>>
>>>>>>>>> Hi Michael,
>>>>>>>>>
>>>>>>>>> no problem for the thread, that's the goal of the mailing list ;)
>>>>>>>>>
>>>>>>>>> And yes, you got my idea about a "meta" module: easy way of
>>>>>>>>> building the
>>>>>>>>> "whole" Java SDK.
>>>>>>>>>
>>>>>>>>> The purpose is not to create a uber jar, but more to simplify the
>>>>>>>>> build
>>>>>>>>> for Java SDK developers.
>>>>>>>>>
>>>>>>>>> Do you want me to complete your PR with what I did ?
>>>>>>>>>
>>>>>>>>> Regards
>>>>>>>>> JB
>>>>>>>>>
>>>>>>>>> On 02/04/2019 16:49, Michael Luckey wrote:
>>>>>>>>> > Going to fork the BEAM-4046 discussion. And, JB, I apologise for
>>>>>>>>> > hijacking your thread.
>>>>>>>>> >
>>>>>>>>> > As for the original question, I understood a request for a meta
>>>>>>>>> project
>>>>>>>>> > which will enable easier handling of java projects. E.g. instead
>>>>>>>>> of
>>>>>>>>> > requiring the user to call
>>>>>>>>> >
>>>>>>>>> > ./gradlew module1:build module2:build ... moduleN.build
>>>>>>>>> >
>>>>>>>>> > a meta project with build task defined something about
>>>>>>>>> >
>>>>>>>>> > build.dependsOn module1:build
>>>>>>>>> > build.dependsOn module2:build
>>>>>>>>> > ...
>>>>>>>>> > build.dependsOn moduleN:build
>>>>>>>>> >
>>>>>>>>> > And other task as found usable.
>>>>>>>>> >
>>>>>>>>> > Not a project which in itself creates some uberjar, which I also
>>>>>>>>> believe
>>>>>>>>> > would rather difficult to implement.
>>>>>>>>> >
>>>>>>>>> > On Tue, Apr 2, 2019 at 5:13 AM Kenneth Knowles <kenn@apache.org
>>>>>>>>> > <ma...@apache.org>> wrote:
>>>>>>>>> >
>>>>>>>>> > Oh, yikes. It seems
>>>>>>>>> > like https://github.com/gradle/gradle/issues/847 indicates
>>>>>>>>> that the
>>>>>>>>> > feature to use the default names in Gradle is practically
>>>>>>>>> > nonfunctional. If that bug is as severe as it looks, I have
>>>>>>>>> to
>>>>>>>>> > retract my position. Like we could never have sdks/java/core
>>>>>>>>> and
>>>>>>>>> > sdks/py/core, right?
>>>>>>>>> >
>>>>>>>>> > Kenn
>>>>>>>>> >
>>>>>>>>> > On Mon, Apr 1, 2019 at 6:27 PM Michael Luckey <
>>>>>>>>> adude3141@gmail.com
>>>>>>>>> > <ma...@gmail.com>> wrote:
>>>>>>>>> >
>>>>>>>>> > FWIW, hacked something as showcase for BEAM-4046 [1]
>>>>>>>>> >
>>>>>>>>> > This is miserably broken, but a
>>>>>>>>> >
>>>>>>>>> > ./gradlew projects
>>>>>>>>> >
>>>>>>>>> > or
>>>>>>>>> >
>>>>>>>>> > ./gradlew -p sdks/java build
>>>>>>>>> >
>>>>>>>>> > should work. Anything else is likely to cause issues. If
>>>>>>>>> u hit
>>>>>>>>> > stack overflow exception, it's likely caused
>>>>>>>>> > by https://github.com/gradle/gradle/issues/847
>>>>>>>>> >
>>>>>>>>> > To continue here, lots of cleanup has to be done. We
>>>>>>>>> might also
>>>>>>>>> > need to rename folders etc, do better reflect semantic
>>>>>>>>> intentions.
>>>>>>>>> >
>>>>>>>>> > [1] https://github.com/apache/beam/pull/8194
>>>>>>>>> >
>>>>>>>>> > On Mon, Apr 1, 2019 at 11:56 PM Kenneth Knowles <
>>>>>>>>> kenn@apache.org
>>>>>>>>> > <ma...@apache.org>> wrote:
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > On Mon, Apr 1, 2019 at 2:20 PM Lukasz Cwik <
>>>>>>>>> lcwik@google.com
>>>>>>>>> > <ma...@google.com>> wrote:
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > On Mon, Apr 1, 2019 at 2:00 PM Kenneth Knowles
>>>>>>>>> > <kenn@apache.org <ma...@apache.org>>
>>>>>>>>> wrote:
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > As to building an aggregated "Java" project,
>>>>>>>>> I think
>>>>>>>>> > the blocker will be supporting conflicting
>>>>>>>>> deps. For
>>>>>>>>> > IOs like ElasticSearch and runners like
>>>>>>>>> Flink the
>>>>>>>>> > conflict is essential and deliberate, to
>>>>>>>>> support
>>>>>>>>> > multiple versions of other services. And
>>>>>>>>> that is not
>>>>>>>>> > even talking about transitive dep conflicts.
>>>>>>>>> I think
>>>>>>>>> > Python and Go don't have this issue simply
>>>>>>>>> because
>>>>>>>>> > they haven't tackled those problems.
>>>>>>>>> >
>>>>>>>>> > Are you talking about just a shortcut for
>>>>>>>>> building
>>>>>>>>> > (super easy to just add since we are using
>>>>>>>>> Gradle)
>>>>>>>>> > or a new artifact that you want to
>>>>>>>>> distribute?
>>>>>>>>> >
>>>>>>>>> > On Mon, Apr 1, 2019 at 10:01 AM Lukasz Cwik
>>>>>>>>> > <lcwik@google.com <ma...@google.com>>
>>>>>>>>> wrote:
>>>>>>>>> >
>>>>>>>>> > During the gradle migration, we used to
>>>>>>>>> have
>>>>>>>>> > something like:
>>>>>>>>> >
>>>>>>>>> > include(":sdks:java:core")
>>>>>>>>> > include(":sdks:java:extensions:sql")
>>>>>>>>> > include(":sdks:python")
>>>>>>>>> >
>>>>>>>>> > Just to be super clear, this is Gradle
>>>>>>>>> default and
>>>>>>>>> > is equivalent to just leaving it blank.
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > but we discovered the Maven module names
>>>>>>>>> that
>>>>>>>>> > were used during publishing were "core"
>>>>>>>>> / "sql"
>>>>>>>>> > / ... (effectively the directory name)
>>>>>>>>> instead
>>>>>>>>> > of "beam-sdks-java-core".
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Isn't this managed by the publication
>>>>>>>>> > plugin?
>>>>>>>>> https://docs.gradle.org/current/userguide/publishing_maven.html#sec:identity_values_in_the_generated_pom
>>>>>>>>> "overriding
>>>>>>>>> > the default identity values is easy: simply
>>>>>>>>> specify
>>>>>>>>> > the groupId, artifactId or version
>>>>>>>>> attributes when
>>>>>>>>> > configuring the MavenPublication."
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > During the gradle migration this wasn't that
>>>>>>>>> easy. The
>>>>>>>>> > new maven publish plugin improved a lot since
>>>>>>>>> then.
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Using the default at the time also broke
>>>>>>>>> the
>>>>>>>>> > artifact names for intra project
>>>>>>>>> dependencies
>>>>>>>>> > that we generate[1]. Finally, we also
>>>>>>>>> ran into
>>>>>>>>> > an issue because we had more then one
>>>>>>>>> Gradle
>>>>>>>>> > project with the same directory name
>>>>>>>>> even though
>>>>>>>>> > they were under a different parent
>>>>>>>>> folder (I
>>>>>>>>> > think it was "core") and that was
>>>>>>>>> leading to
>>>>>>>>> > some strange build time behavior.
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Weird. But I think the Jira should still
>>>>>>>>> stand as a
>>>>>>>>> > move towards simplifying our build and
>>>>>>>>> making it
>>>>>>>>> > more discoverable for new contributors.
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Agree on the JIRA makes sense, just calling out
>>>>>>>>> that
>>>>>>>>> > there were other issues that this naming had
>>>>>>>>> caused in
>>>>>>>>> > the past which should be checked before we call
>>>>>>>>> this done.
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Totally agree. It will be quite a large task with a
>>>>>>>>> lot of
>>>>>>>>> > boilerplate that might not be separable from
>>>>>>>>> technical
>>>>>>>>> > blockers that come up as you go through the
>>>>>>>>> boilerplate.
>>>>>>>>> >
>>>>>>>>> > Kenn
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Kenn
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > We didn't migrate to a flat project
>>>>>>>>> structure
>>>>>>>>> > where each project is a folder
>>>>>>>>> underneath the
>>>>>>>>> > root project because of the
>>>>>>>>> existing Maven build
>>>>>>>>> > rules that were being maintained in
>>>>>>>>> parallel and
>>>>>>>>> > I'm not sure if people would want to
>>>>>>>>> have a flat
>>>>>>>>> > project structure either.
>>>>>>>>> >
>>>>>>>>> > 1:
>>>>>>>>> https://github.com/apache/beam/blob/a85ea07b719385ec185e4fc5e4cdcc67b3598599/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L1055
>>>>>>>>> >
>>>>>>>>> > On Mon, Apr 1, 2019 at 9:49 AM Michael
>>>>>>>>> Luckey
>>>>>>>>> > <adude3141@gmail.com
>>>>>>>>> > <ma...@gmail.com>> wrote:
>>>>>>>>> >
>>>>>>>>> > Hi,
>>>>>>>>> >
>>>>>>>>> > although I did not yet manage to get
>>>>>>>>> deeper
>>>>>>>>> > involved into actual development, I
>>>>>>>>> think
>>>>>>>>> > this ability would be a useful
>>>>>>>>> addition.
>>>>>>>>> >
>>>>>>>>> > But I would also like to point out,
>>>>>>>>> that
>>>>>>>>> > this is kind of implicit, as soon we
>>>>>>>>> > get
>>>>>>>>> https://issues.apache.org/jira/browse/BEAM-4046
>>>>>>>>> > included.
>>>>>>>>> >
>>>>>>>>> > For instance, we would change the
>>>>>>>>> current
>>>>>>>>> > setup from
>>>>>>>>> >
>>>>>>>>> > include "beam-sdks-java-core"
>>>>>>>>> > project(":beam-sdks-java-core").dir
>>>>>>>>> = file("sdks/java/core")
>>>>>>>>> >
>>>>>>>>> > to something like
>>>>>>>>> >
>>>>>>>>> > include(":sdks:java:core")
>>>>>>>>> > include(":sdks:java:extensions:sql")
>>>>>>>>> > include(":sdks:python")
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > With this in place a plain
>>>>>>>>> >
>>>>>>>>> > $ ./gradlew -p sdks/java build
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > would exactly do what you want. And,
>>>>>>>>> of
>>>>>>>>> > course, this will also work for
>>>>>>>>> > 'sdks/java/io', 'runners/' etc.
>>>>>>>>> Hope, you
>>>>>>>>> > get the point.
>>>>>>>>> >
>>>>>>>>> > Currently, we deviate from gradle
>>>>>>>>> default
>>>>>>>>> > convention and therefore have to
>>>>>>>>> implement
>>>>>>>>> > some quirks to restore default
>>>>>>>>> behaviour.
>>>>>>>>> > And I somehow dislike the structure
>>>>>>>>> > introduced by parent/child folders,
>>>>>>>>> which
>>>>>>>>> > will be destroyed by our current
>>>>>>>>> project
>>>>>>>>> > definitions.
>>>>>>>>> >
>>>>>>>>> > But, to be honest, although I have
>>>>>>>>> some
>>>>>>>>> > clear understanding on how to
>>>>>>>>> proceed here -
>>>>>>>>> > especially regarding the requirement
>>>>>>>>> to keep
>>>>>>>>> > the change backwards compatible - we
>>>>>>>>> might
>>>>>>>>> > decide not to switch. Because deeper
>>>>>>>>> > investigation might reveal issues,
>>>>>>>>> which I
>>>>>>>>> > am currently not aware of.
>>>>>>>>> >
>>>>>>>>> > Best,
>>>>>>>>> >
>>>>>>>>> > michel
>>>>>>>>> >
>>>>>>>>> > On Mon, Apr 1, 2019 at 5:52 PM
>>>>>>>>> Jean-Baptiste
>>>>>>>>> > Onofré <jb@nanthrax.net
>>>>>>>>> > <ma...@nanthrax.net>> wrote:
>>>>>>>>> >
>>>>>>>>> > Hi guys,
>>>>>>>>> >
>>>>>>>>> > I would like to introduce a
>>>>>>>>> Gradle
>>>>>>>>> > "meta" project for the build:
>>>>>>>>> > beam-sdks-java.
>>>>>>>>> >
>>>>>>>>> > The idea is to simply build all
>>>>>>>>> Java SDK
>>>>>>>>> > related resources (core, IO,
>>>>>>>>> ...).
>>>>>>>>> >
>>>>>>>>> > The purpose is also to be
>>>>>>>>> aligned with
>>>>>>>>> > the other SDKs which provide
>>>>>>>>> > beam-sdks-go and
>>>>>>>>> beam-sdks-python.
>>>>>>>>> >
>>>>>>>>> > Thoughts ?
>>>>>>>>> >
>>>>>>>>> > Regards
>>>>>>>>> > JB
>>>>>>>>> > --
>>>>>>>>> > Jean-Baptiste Onofré
>>>>>>>>> > jbonofre@apache.org
>>>>>>>>> > <ma...@apache.org>
>>>>>>>>> > http://blog.nanthrax.net
>>>>>>>>> > Talend - http://www.talend.com
>>>>>>>>> >
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Jean-Baptiste Onofré
>>>>>>>>> jbonofre@apache.org
>>>>>>>>> http://blog.nanthrax.net
>>>>>>>>> Talend - http://www.talend.com
>>>>>>>>>
>>>>>>>>
Re: [Forked] BEAM-4046 (was [PROPOSAL] Introduce beam-sdks-java
gradle project)
Posted by Lukasz Cwik <lc...@google.com>.
I have opened up https://github.com/apache/beam/pull/8881 which migrates
the jenkins runs to use the new names since it has been a month since the
rename went in.
After this, we should remove the deprecated project mappings and require
everyone to use the directory based names instead of the artifact names as
agreed upon in this thread.
On Mon, May 13, 2019 at 1:57 AM Michael Luckey <ad...@gmail.com> wrote:
> Thanks Kenn!
>
> This change will be merged in today, about 13:00 Pacific Time.
>
> From then on, will will have ditched the flat project layout. I.e project
> will need to be referenced by full path instead of some 'symbolic' name.
> E.g. project
> ':beam-sdks-java-core' will be referenced as ':sdks:java:core', which is
> just the relative folder path to the project.
>
> We wlll not run the seed job immediately, because some compatibility layer
> for Gradle command line is implemented, which enables running task
> referenced by the old style, i.e.
> ':beam-sdks-java-core:build' is still working for a while. After running
> the seed job, conflicting PRs might not be able to run on Jenkins anymore,
> but a rebase is required anyway
> so this should be done as soon as possible.
>
> Regarding the IDE, an import is required This should work apart from the
> known issues as before. Unfortunately I was unable to test every new option
> available. E.g. now we do have those
> 'runners:validateRunner' et al. task which did not 'exist' before. They
> should work, but if any issues arise, please open a jira and feel free to
> ping/assign to me.
>
> Thanks,
>
> michel
>
> On Thu, May 2, 2019 at 6:00 PM Kenneth Knowles <ke...@apache.org> wrote:
>
>> The issue has been discussed for a full month, with no objections. I'd
>> call that lazy consensus. And since you have found a way to be backwards
>> compatible, it doesn't even have to impact docs or scripts. This is great.
>>
>> Kenn
>>
>> On Thu, May 2, 2019 at 8:43 AM Michael Luckey <ad...@gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> after implementing the required changes to switch from the current flat
>>> Gradle project structure to the hierarchical represented by the folder
>>> hierarchy I propose to merge the changes [1] after cut of next release
>>> branch (which is scheduled around May, 8th.)
>>>
>>> Does anyone have any concerns or objections doing this change (or doing
>>> it now) or can we proceed as suggested? Any questions about this?
>>>
>>> Best,
>>>
>>> michel
>>>
>>> [1] https://github.com/apache/beam/pull/8194
>>>
>>>
>>>
>>> On Thu, Apr 11, 2019 at 1:04 AM Michael Luckey <ad...@gmail.com>
>>> wrote:
>>>
>>>> To my understanding, that's it, yes. Of course, there might be other
>>>> places/plugins which use plugin.group. But maven coordinates are definitely
>>>> those which need to be consistent.
>>>>
>>>> On Thu, Apr 11, 2019 at 12:57 AM Lukasz Cwik <lc...@google.com> wrote:
>>>>
>>>>> We may be saying the same thing but wanted to be clear that we only
>>>>> need to override the default that publishing plugin uses to always be
>>>>> "org.apache.beam" instead of defaulting to project.group
>>>>>
>>>>> On Wed, Apr 10, 2019 at 3:22 PM Kenneth Knowles <ke...@apache.org>
>>>>> wrote:
>>>>>
>>>>>> So, if we set the "group" on projects only as part of publishing then
>>>>>> everything starts to work? That sounds ideal.
>>>>>>
>>>>>> Kenn
>>>>>>
>>>>>> On Tue, Apr 9, 2019 at 3:49 PM Lukasz Cwik <lc...@google.com> wrote:
>>>>>>
>>>>>>> It would be good if we did as much as possible to make our project
>>>>>>> as much as a conventional Gradle project. It means that more people will be
>>>>>>> familiar with the setup, our setup will likely require less maintenance
>>>>>>> with version bumps in gradle and also that examples/solutions online will
>>>>>>> relate better to our project.
>>>>>>>
>>>>>>> On Mon, Apr 8, 2019 at 6:22 PM Michael Luckey <ad...@gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> After playing around, it turns out to be rather straightforward.
>>>>>>>> The problem is not really caused by a Gradle bug, but more by the usual
>>>>>>>> issue that deviating from gradle defaults/conventions often causes
>>>>>>>> headaches.
>>>>>>>>
>>>>>>>> In this case the conflicts are caused by beam eagerly setting
>>>>>>>> project.group for all modules [1]. Of course this implies removing
>>>>>>>> structure and as such causing these name conflicts. I do not think, we need
>>>>>>>> to have that unique group set on our projects. So not globally rewriting,
>>>>>>>> but using the default group (== project.path) resolves this issue. Of
>>>>>>>> course, we then do have to set values accordingly on all places, which
>>>>>>>> default to project.group, where we would like to have our maven group id,
>>>>>>>> e.g. [2]
>>>>>>>>
>>>>>>>> Now before I am going to invest more time for testing, I would like
>>>>>>>> to start the discussion, whether we would like to move to this more
>>>>>>>> hierarchical project representation or prefer to stop here and stay with
>>>>>>>> the current state. If we prefer the current flat structure, we might
>>>>>>>> consider to restructure our folder hierarchy accordingly to ease lookup of
>>>>>>>> the code. At least we need better documentation about the projects and how
>>>>>>>> they relate.
>>>>>>>>
>>>>>>>> Thoughts?
>>>>>>>>
>>>>>>>> [1]
>>>>>>>> https://github.com/apache/beam/blob/master/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L283
>>>>>>>> [2]
>>>>>>>> https://github.com/apache/beam/blob/f9352dc7751c2c35a9189bd405e8a5ef33998b84/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L1001
>>>>>>>>
>>>>>>>> On Wed, Apr 3, 2019 at 5:54 PM Lukasz Cwik <lc...@google.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> As a minor point, we do have some cross language dependencies, for
>>>>>>>>> example:
>>>>>>>>> * the portability related proto projects are intended to be
>>>>>>>>> consumed by Go, Java and Python
>>>>>>>>> * the docker container gradle projects contain other applications
>>>>>>>>> (e.g. go boot code) that are placed inside the docker container that
>>>>>>>>> contain the language specific SDK harness. There will likely be additional
>>>>>>>>> applications that are separate from the SDK harness like a docker container
>>>>>>>>> health checker that are placed in there as well
>>>>>>>>>
>>>>>>>>> On Tue, Apr 2, 2019 at 3:21 PM Michael Luckey <ad...@gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> agree with Kenn, that this issue at least renders the default
>>>>>>>>>> implementation difficult to use.
>>>>>>>>>>
>>>>>>>>>> Although in the example given, i.e. having sdks/java/core and
>>>>>>>>>> sdks/py/core, I am unsure, whether it will impose a problem.
>>>>>>>>>>
>>>>>>>>>> As far as I understand until now, the issue triggers on
>>>>>>>>>> dependency declaration. These are - in general - expressed with 3
>>>>>>>>>> dimensional maven coordinates GroupID, artifactID and version. Of course -
>>>>>>>>>> semantic of version is clear - there are only 2 dimension left to
>>>>>>>>>> distinguish artefacts. As we use a single group id (org.apache.beam) there
>>>>>>>>>> is only one dimension left.
>>>>>>>>>>
>>>>>>>>>> Now this does not impose a problem on plain library dependencies.
>>>>>>>>>> Of course they are uniquely defined. But we are using also lots of project
>>>>>>>>>> dependencies. This project dependencies are translated from project path to
>>>>>>>>>> those maven coordinates. Unfortunately here the project name - which
>>>>>>>>>> happens to be the folder name - is used as artefact id. So if folder names
>>>>>>>>>> match, we might get collisions during dependency resolution.
>>>>>>>>>>
>>>>>>>>>> Clearly, it is not possible to deploy artefacts with those same
>>>>>>>>>> ids to any maven rep expecting sensible results. So we do either not deploy
>>>>>>>>>> an artefact from one of these projects - which would kind of strange as we
>>>>>>>>>> do have a project dependency here - or do rewrite the artefact id of (at
>>>>>>>>>> least) one of the colliding projects. ( we currently do that implicitly
>>>>>>>>>> with the project name we create by flattening our structure)
>>>>>>>>>>
>>>>>>>>>> Now back to the given example, as I do not expect any java
>>>>>>>>>> project to have a project dependency on python, there might be a chance,
>>>>>>>>>> that this will just work.
>>>>>>>>>>
>>>>>>>>>> But of course, this does not really help, as we reasonably might
>>>>>>>>>> expect some /runner/direct/core or sdks/java/io/someio/core which would
>>>>>>>>>> collide in the same way.
>>>>>>>>>>
>>>>>>>>>> As a possible workaround here, we could
>>>>>>>>>> - either require unique folder names
>>>>>>>>>> - or rewrite only colliding project names (as we currently do for
>>>>>>>>>> all projects)
>>>>>>>>>> - or ... (do not know yet)
>>>>>>>>>>
>>>>>>>>>> I suggest I ll invest some time playing around improving that
>>>>>>>>>> already prepared PR to support discussion. So that we have proper grounding
>>>>>>>>>> to decide whether a more hierarchical project structure will be worth that
>>>>>>>>>> hassle.
>>>>>>>>>>
>>>>>>>>>> Looking at the gradle issue - which is already 2 yrs old and iirc
>>>>>>>>>> was reported already at least one year earlier - I do not expect a fix here
>>>>>>>>>> soon.
>>>>>>>>>>
>>>>>>>>>> On Tue, Apr 2, 2019 at 7:19 PM Lukasz Cwik <lc...@google.com>
>>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>>> I didn't know that https://github.com/gradle/gradle/issues/847 existed
>>>>>>>>>>> but the description of the issues people are having are similar to what was
>>>>>>>>>>> discovered during the gradle migration.
>>>>>>>>>>>
>>>>>>>>>>> On Tue, Apr 2, 2019 at 8:02 AM Jean-Baptiste Onofré <
>>>>>>>>>>> jb@nanthrax.net> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Hi Michael,
>>>>>>>>>>>>
>>>>>>>>>>>> no problem for the thread, that's the goal of the mailing list
>>>>>>>>>>>> ;)
>>>>>>>>>>>>
>>>>>>>>>>>> And yes, you got my idea about a "meta" module: easy way of
>>>>>>>>>>>> building the
>>>>>>>>>>>> "whole" Java SDK.
>>>>>>>>>>>>
>>>>>>>>>>>> The purpose is not to create a uber jar, but more to simplify
>>>>>>>>>>>> the build
>>>>>>>>>>>> for Java SDK developers.
>>>>>>>>>>>>
>>>>>>>>>>>> Do you want me to complete your PR with what I did ?
>>>>>>>>>>>>
>>>>>>>>>>>> Regards
>>>>>>>>>>>> JB
>>>>>>>>>>>>
>>>>>>>>>>>> On 02/04/2019 16:49, Michael Luckey wrote:
>>>>>>>>>>>> > Going to fork the BEAM-4046 discussion. And, JB, I apologise
>>>>>>>>>>>> for
>>>>>>>>>>>> > hijacking your thread.
>>>>>>>>>>>> >
>>>>>>>>>>>> > As for the original question, I understood a request for a
>>>>>>>>>>>> meta project
>>>>>>>>>>>> > which will enable easier handling of java projects. E.g.
>>>>>>>>>>>> instead of
>>>>>>>>>>>> > requiring the user to call
>>>>>>>>>>>> >
>>>>>>>>>>>> > ./gradlew module1:build module2:build ... moduleN.build
>>>>>>>>>>>> >
>>>>>>>>>>>> > a meta project with build task defined something about
>>>>>>>>>>>> >
>>>>>>>>>>>> > build.dependsOn module1:build
>>>>>>>>>>>> > build.dependsOn module2:build
>>>>>>>>>>>> > ...
>>>>>>>>>>>> > build.dependsOn moduleN:build
>>>>>>>>>>>> >
>>>>>>>>>>>> > And other task as found usable.
>>>>>>>>>>>> >
>>>>>>>>>>>> > Not a project which in itself creates some uberjar, which I
>>>>>>>>>>>> also believe
>>>>>>>>>>>> > would rather difficult to implement.
>>>>>>>>>>>> >
>>>>>>>>>>>> > On Tue, Apr 2, 2019 at 5:13 AM Kenneth Knowles <
>>>>>>>>>>>> kenn@apache.org
>>>>>>>>>>>> > <ma...@apache.org>> wrote:
>>>>>>>>>>>> >
>>>>>>>>>>>> > Oh, yikes. It seems
>>>>>>>>>>>> > like https://github.com/gradle/gradle/issues/847 indicates
>>>>>>>>>>>> that the
>>>>>>>>>>>> > feature to use the default names in Gradle is practically
>>>>>>>>>>>> > nonfunctional. If that bug is as severe as it looks, I
>>>>>>>>>>>> have to
>>>>>>>>>>>> > retract my position. Like we could never have
>>>>>>>>>>>> sdks/java/core and
>>>>>>>>>>>> > sdks/py/core, right?
>>>>>>>>>>>> >
>>>>>>>>>>>> > Kenn
>>>>>>>>>>>> >
>>>>>>>>>>>> > On Mon, Apr 1, 2019 at 6:27 PM Michael Luckey <
>>>>>>>>>>>> adude3141@gmail.com
>>>>>>>>>>>> > <ma...@gmail.com>> wrote:
>>>>>>>>>>>> >
>>>>>>>>>>>> > FWIW, hacked something as showcase for BEAM-4046 [1]
>>>>>>>>>>>> >
>>>>>>>>>>>> > This is miserably broken, but a
>>>>>>>>>>>> >
>>>>>>>>>>>> > ./gradlew projects
>>>>>>>>>>>> >
>>>>>>>>>>>> > or
>>>>>>>>>>>> >
>>>>>>>>>>>> > ./gradlew -p sdks/java build
>>>>>>>>>>>> >
>>>>>>>>>>>> > should work. Anything else is likely to cause issues.
>>>>>>>>>>>> If u hit
>>>>>>>>>>>> > stack overflow exception, it's likely caused
>>>>>>>>>>>> > by https://github.com/gradle/gradle/issues/847
>>>>>>>>>>>> >
>>>>>>>>>>>> > To continue here, lots of cleanup has to be done. We
>>>>>>>>>>>> might also
>>>>>>>>>>>> > need to rename folders etc, do better reflect
>>>>>>>>>>>> semantic intentions.
>>>>>>>>>>>> >
>>>>>>>>>>>> > [1] https://github.com/apache/beam/pull/8194
>>>>>>>>>>>> >
>>>>>>>>>>>> > On Mon, Apr 1, 2019 at 11:56 PM Kenneth Knowles <
>>>>>>>>>>>> kenn@apache.org
>>>>>>>>>>>> > <ma...@apache.org>> wrote:
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > On Mon, Apr 1, 2019 at 2:20 PM Lukasz Cwik <
>>>>>>>>>>>> lcwik@google.com
>>>>>>>>>>>> > <ma...@google.com>> wrote:
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > On Mon, Apr 1, 2019 at 2:00 PM Kenneth Knowles
>>>>>>>>>>>> > <kenn@apache.org <ma...@apache.org>>
>>>>>>>>>>>> wrote:
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > As to building an aggregated "Java"
>>>>>>>>>>>> project, I think
>>>>>>>>>>>> > the blocker will be supporting
>>>>>>>>>>>> conflicting deps. For
>>>>>>>>>>>> > IOs like ElasticSearch and runners like
>>>>>>>>>>>> Flink the
>>>>>>>>>>>> > conflict is essential and deliberate, to
>>>>>>>>>>>> support
>>>>>>>>>>>> > multiple versions of other services. And
>>>>>>>>>>>> that is not
>>>>>>>>>>>> > even talking about transitive dep
>>>>>>>>>>>> conflicts. I think
>>>>>>>>>>>> > Python and Go don't have this issue
>>>>>>>>>>>> simply because
>>>>>>>>>>>> > they haven't tackled those problems.
>>>>>>>>>>>> >
>>>>>>>>>>>> > Are you talking about just a shortcut for
>>>>>>>>>>>> building
>>>>>>>>>>>> > (super easy to just add since we are
>>>>>>>>>>>> using Gradle)
>>>>>>>>>>>> > or a new artifact that you want to
>>>>>>>>>>>> distribute?
>>>>>>>>>>>> >
>>>>>>>>>>>> > On Mon, Apr 1, 2019 at 10:01 AM Lukasz
>>>>>>>>>>>> Cwik
>>>>>>>>>>>> > <lcwik@google.com <mailto:
>>>>>>>>>>>> lcwik@google.com>> wrote:
>>>>>>>>>>>> >
>>>>>>>>>>>> > During the gradle migration, we used
>>>>>>>>>>>> to have
>>>>>>>>>>>> > something like:
>>>>>>>>>>>> >
>>>>>>>>>>>> > include(":sdks:java:core")
>>>>>>>>>>>> > include(":sdks:java:extensions:sql")
>>>>>>>>>>>> > include(":sdks:python")
>>>>>>>>>>>> >
>>>>>>>>>>>> > Just to be super clear, this is Gradle
>>>>>>>>>>>> default and
>>>>>>>>>>>> > is equivalent to just leaving it blank.
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > but we discovered the Maven module
>>>>>>>>>>>> names that
>>>>>>>>>>>> > were used during publishing were
>>>>>>>>>>>> "core" / "sql"
>>>>>>>>>>>> > / ... (effectively the directory
>>>>>>>>>>>> name) instead
>>>>>>>>>>>> > of "beam-sdks-java-core".
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > Isn't this managed by the publication
>>>>>>>>>>>> > plugin?
>>>>>>>>>>>> https://docs.gradle.org/current/userguide/publishing_maven.html#sec:identity_values_in_the_generated_pom
>>>>>>>>>>>> "overriding
>>>>>>>>>>>> > the default identity values is easy:
>>>>>>>>>>>> simply specify
>>>>>>>>>>>> > the groupId, artifactId or version
>>>>>>>>>>>> attributes when
>>>>>>>>>>>> > configuring the MavenPublication."
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > During the gradle migration this wasn't that
>>>>>>>>>>>> easy. The
>>>>>>>>>>>> > new maven publish plugin improved a lot since
>>>>>>>>>>>> then.
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > Using the default at the time also
>>>>>>>>>>>> broke the
>>>>>>>>>>>> > artifact names for intra project
>>>>>>>>>>>> dependencies
>>>>>>>>>>>> > that we generate[1]. Finally, we also
>>>>>>>>>>>> ran into
>>>>>>>>>>>> > an issue because we had more then one
>>>>>>>>>>>> Gradle
>>>>>>>>>>>> > project with the same directory name
>>>>>>>>>>>> even though
>>>>>>>>>>>> > they were under a different parent
>>>>>>>>>>>> folder (I
>>>>>>>>>>>> > think it was "core") and that was
>>>>>>>>>>>> leading to
>>>>>>>>>>>> > some strange build time behavior.
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > Weird. But I think the Jira should still
>>>>>>>>>>>> stand as a
>>>>>>>>>>>> > move towards simplifying our build and
>>>>>>>>>>>> making it
>>>>>>>>>>>> > more discoverable for new contributors.
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > Agree on the JIRA makes sense, just calling
>>>>>>>>>>>> out that
>>>>>>>>>>>> > there were other issues that this naming had
>>>>>>>>>>>> caused in
>>>>>>>>>>>> > the past which should be checked before we
>>>>>>>>>>>> call this done.
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > Totally agree. It will be quite a large task with
>>>>>>>>>>>> a lot of
>>>>>>>>>>>> > boilerplate that might not be separable from
>>>>>>>>>>>> technical
>>>>>>>>>>>> > blockers that come up as you go through the
>>>>>>>>>>>> boilerplate.
>>>>>>>>>>>> >
>>>>>>>>>>>> > Kenn
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > Kenn
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > We didn't migrate to a flat project
>>>>>>>>>>>> structure
>>>>>>>>>>>> > where each project is a folder
>>>>>>>>>>>> underneath the
>>>>>>>>>>>> > root project because of the
>>>>>>>>>>>> existing Maven build
>>>>>>>>>>>> > rules that were being maintained in
>>>>>>>>>>>> parallel and
>>>>>>>>>>>> > I'm not sure if people would want to
>>>>>>>>>>>> have a flat
>>>>>>>>>>>> > project structure either.
>>>>>>>>>>>> >
>>>>>>>>>>>> > 1:
>>>>>>>>>>>> https://github.com/apache/beam/blob/a85ea07b719385ec185e4fc5e4cdcc67b3598599/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L1055
>>>>>>>>>>>> >
>>>>>>>>>>>> > On Mon, Apr 1, 2019 at 9:49 AM
>>>>>>>>>>>> Michael Luckey
>>>>>>>>>>>> > <adude3141@gmail.com
>>>>>>>>>>>> > <ma...@gmail.com>> wrote:
>>>>>>>>>>>> >
>>>>>>>>>>>> > Hi,
>>>>>>>>>>>> >
>>>>>>>>>>>> > although I did not yet manage to
>>>>>>>>>>>> get deeper
>>>>>>>>>>>> > involved into actual development,
>>>>>>>>>>>> I think
>>>>>>>>>>>> > this ability would be a useful
>>>>>>>>>>>> addition.
>>>>>>>>>>>> >
>>>>>>>>>>>> > But I would also like to point
>>>>>>>>>>>> out, that
>>>>>>>>>>>> > this is kind of implicit, as soon
>>>>>>>>>>>> we
>>>>>>>>>>>> > get
>>>>>>>>>>>> https://issues.apache.org/jira/browse/BEAM-4046
>>>>>>>>>>>> > included.
>>>>>>>>>>>> >
>>>>>>>>>>>> > For instance, we would change the
>>>>>>>>>>>> current
>>>>>>>>>>>> > setup from
>>>>>>>>>>>> >
>>>>>>>>>>>> > include "beam-sdks-java-core"
>>>>>>>>>>>> >
>>>>>>>>>>>> project(":beam-sdks-java-core").dir = file("sdks/java/core")
>>>>>>>>>>>> >
>>>>>>>>>>>> > to something like
>>>>>>>>>>>> >
>>>>>>>>>>>> > include(":sdks:java:core")
>>>>>>>>>>>> >
>>>>>>>>>>>> include(":sdks:java:extensions:sql")
>>>>>>>>>>>> > include(":sdks:python")
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > With this in place a plain
>>>>>>>>>>>> >
>>>>>>>>>>>> > $ ./gradlew -p sdks/java build
>>>>>>>>>>>> >
>>>>>>>>>>>> >
>>>>>>>>>>>> > would exactly do what you want.
>>>>>>>>>>>> And, of
>>>>>>>>>>>> > course, this will also work for
>>>>>>>>>>>> > 'sdks/java/io', 'runners/' etc.
>>>>>>>>>>>> Hope, you
>>>>>>>>>>>> > get the point.
>>>>>>>>>>>> >
>>>>>>>>>>>> > Currently, we deviate from gradle
>>>>>>>>>>>> default
>>>>>>>>>>>> > convention and therefore have to
>>>>>>>>>>>> implement
>>>>>>>>>>>> > some quirks to restore default
>>>>>>>>>>>> behaviour.
>>>>>>>>>>>> > And I somehow dislike the
>>>>>>>>>>>> structure
>>>>>>>>>>>> > introduced by parent/child
>>>>>>>>>>>> folders, which
>>>>>>>>>>>> > will be destroyed by our current
>>>>>>>>>>>> project
>>>>>>>>>>>> > definitions.
>>>>>>>>>>>> >
>>>>>>>>>>>> > But, to be honest, although I
>>>>>>>>>>>> have some
>>>>>>>>>>>> > clear understanding on how to
>>>>>>>>>>>> proceed here -
>>>>>>>>>>>> > especially regarding the
>>>>>>>>>>>> requirement to keep
>>>>>>>>>>>> > the change backwards compatible -
>>>>>>>>>>>> we might
>>>>>>>>>>>> > decide not to switch. Because
>>>>>>>>>>>> deeper
>>>>>>>>>>>> > investigation might reveal
>>>>>>>>>>>> issues, which I
>>>>>>>>>>>> > am currently not aware of.
>>>>>>>>>>>> >
>>>>>>>>>>>> > Best,
>>>>>>>>>>>> >
>>>>>>>>>>>> > michel
>>>>>>>>>>>> >
>>>>>>>>>>>> > On Mon, Apr 1, 2019 at 5:52 PM
>>>>>>>>>>>> Jean-Baptiste
>>>>>>>>>>>> > Onofré <jb@nanthrax.net
>>>>>>>>>>>> > <ma...@nanthrax.net>> wrote:
>>>>>>>>>>>> >
>>>>>>>>>>>> > Hi guys,
>>>>>>>>>>>> >
>>>>>>>>>>>> > I would like to introduce a
>>>>>>>>>>>> Gradle
>>>>>>>>>>>> > "meta" project for the build:
>>>>>>>>>>>> > beam-sdks-java.
>>>>>>>>>>>> >
>>>>>>>>>>>> > The idea is to simply build
>>>>>>>>>>>> all Java SDK
>>>>>>>>>>>> > related resources (core, IO,
>>>>>>>>>>>> ...).
>>>>>>>>>>>> >
>>>>>>>>>>>> > The purpose is also to be
>>>>>>>>>>>> aligned with
>>>>>>>>>>>> > the other SDKs which provide
>>>>>>>>>>>> > beam-sdks-go and
>>>>>>>>>>>> beam-sdks-python.
>>>>>>>>>>>> >
>>>>>>>>>>>> > Thoughts ?
>>>>>>>>>>>> >
>>>>>>>>>>>> > Regards
>>>>>>>>>>>> > JB
>>>>>>>>>>>> > --
>>>>>>>>>>>> > Jean-Baptiste Onofré
>>>>>>>>>>>> > jbonofre@apache.org
>>>>>>>>>>>> > <ma...@apache.org>
>>>>>>>>>>>> > http://blog.nanthrax.net
>>>>>>>>>>>> > Talend -
>>>>>>>>>>>> http://www.talend.com
>>>>>>>>>>>> >
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> Jean-Baptiste Onofré
>>>>>>>>>>>> jbonofre@apache.org
>>>>>>>>>>>> http://blog.nanthrax.net
>>>>>>>>>>>> Talend - http://www.talend.com
>>>>>>>>>>>>
>>>>>>>>>>>
Re: [Forked] BEAM-4046 (was [PROPOSAL] Introduce beam-sdks-java
gradle project)
Posted by Michael Luckey <ad...@gmail.com>.
Thanks Kenn!
This change will be merged in today, about 13:00 Pacific Time.
From then on, will will have ditched the flat project layout. I.e project
will need to be referenced by full path instead of some 'symbolic' name.
E.g. project
':beam-sdks-java-core' will be referenced as ':sdks:java:core', which is
just the relative folder path to the project.
We wlll not run the seed job immediately, because some compatibility layer
for Gradle command line is implemented, which enables running task
referenced by the old style, i.e.
':beam-sdks-java-core:build' is still working for a while. After running
the seed job, conflicting PRs might not be able to run on Jenkins anymore,
but a rebase is required anyway
so this should be done as soon as possible.
Regarding the IDE, an import is required This should work apart from the
known issues as before. Unfortunately I was unable to test every new option
available. E.g. now we do have those
'runners:validateRunner' et al. task which did not 'exist' before. They
should work, but if any issues arise, please open a jira and feel free to
ping/assign to me.
Thanks,
michel
On Thu, May 2, 2019 at 6:00 PM Kenneth Knowles <ke...@apache.org> wrote:
> The issue has been discussed for a full month, with no objections. I'd
> call that lazy consensus. And since you have found a way to be backwards
> compatible, it doesn't even have to impact docs or scripts. This is great.
>
> Kenn
>
> On Thu, May 2, 2019 at 8:43 AM Michael Luckey <ad...@gmail.com> wrote:
>
>> Hi,
>>
>> after implementing the required changes to switch from the current flat
>> Gradle project structure to the hierarchical represented by the folder
>> hierarchy I propose to merge the changes [1] after cut of next release
>> branch (which is scheduled around May, 8th.)
>>
>> Does anyone have any concerns or objections doing this change (or doing
>> it now) or can we proceed as suggested? Any questions about this?
>>
>> Best,
>>
>> michel
>>
>> [1] https://github.com/apache/beam/pull/8194
>>
>>
>>
>> On Thu, Apr 11, 2019 at 1:04 AM Michael Luckey <ad...@gmail.com>
>> wrote:
>>
>>> To my understanding, that's it, yes. Of course, there might be other
>>> places/plugins which use plugin.group. But maven coordinates are definitely
>>> those which need to be consistent.
>>>
>>> On Thu, Apr 11, 2019 at 12:57 AM Lukasz Cwik <lc...@google.com> wrote:
>>>
>>>> We may be saying the same thing but wanted to be clear that we only
>>>> need to override the default that publishing plugin uses to always be
>>>> "org.apache.beam" instead of defaulting to project.group
>>>>
>>>> On Wed, Apr 10, 2019 at 3:22 PM Kenneth Knowles <ke...@apache.org>
>>>> wrote:
>>>>
>>>>> So, if we set the "group" on projects only as part of publishing then
>>>>> everything starts to work? That sounds ideal.
>>>>>
>>>>> Kenn
>>>>>
>>>>> On Tue, Apr 9, 2019 at 3:49 PM Lukasz Cwik <lc...@google.com> wrote:
>>>>>
>>>>>> It would be good if we did as much as possible to make our project as
>>>>>> much as a conventional Gradle project. It means that more people will be
>>>>>> familiar with the setup, our setup will likely require less maintenance
>>>>>> with version bumps in gradle and also that examples/solutions online will
>>>>>> relate better to our project.
>>>>>>
>>>>>> On Mon, Apr 8, 2019 at 6:22 PM Michael Luckey <ad...@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> After playing around, it turns out to be rather straightforward. The
>>>>>>> problem is not really caused by a Gradle bug, but more by the usual issue
>>>>>>> that deviating from gradle defaults/conventions often causes headaches.
>>>>>>>
>>>>>>> In this case the conflicts are caused by beam eagerly setting
>>>>>>> project.group for all modules [1]. Of course this implies removing
>>>>>>> structure and as such causing these name conflicts. I do not think, we need
>>>>>>> to have that unique group set on our projects. So not globally rewriting,
>>>>>>> but using the default group (== project.path) resolves this issue. Of
>>>>>>> course, we then do have to set values accordingly on all places, which
>>>>>>> default to project.group, where we would like to have our maven group id,
>>>>>>> e.g. [2]
>>>>>>>
>>>>>>> Now before I am going to invest more time for testing, I would like
>>>>>>> to start the discussion, whether we would like to move to this more
>>>>>>> hierarchical project representation or prefer to stop here and stay with
>>>>>>> the current state. If we prefer the current flat structure, we might
>>>>>>> consider to restructure our folder hierarchy accordingly to ease lookup of
>>>>>>> the code. At least we need better documentation about the projects and how
>>>>>>> they relate.
>>>>>>>
>>>>>>> Thoughts?
>>>>>>>
>>>>>>> [1]
>>>>>>> https://github.com/apache/beam/blob/master/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L283
>>>>>>> [2]
>>>>>>> https://github.com/apache/beam/blob/f9352dc7751c2c35a9189bd405e8a5ef33998b84/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L1001
>>>>>>>
>>>>>>> On Wed, Apr 3, 2019 at 5:54 PM Lukasz Cwik <lc...@google.com> wrote:
>>>>>>>
>>>>>>>> As a minor point, we do have some cross language dependencies, for
>>>>>>>> example:
>>>>>>>> * the portability related proto projects are intended to be
>>>>>>>> consumed by Go, Java and Python
>>>>>>>> * the docker container gradle projects contain other applications
>>>>>>>> (e.g. go boot code) that are placed inside the docker container that
>>>>>>>> contain the language specific SDK harness. There will likely be additional
>>>>>>>> applications that are separate from the SDK harness like a docker container
>>>>>>>> health checker that are placed in there as well
>>>>>>>>
>>>>>>>> On Tue, Apr 2, 2019 at 3:21 PM Michael Luckey <ad...@gmail.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> agree with Kenn, that this issue at least renders the default
>>>>>>>>> implementation difficult to use.
>>>>>>>>>
>>>>>>>>> Although in the example given, i.e. having sdks/java/core and
>>>>>>>>> sdks/py/core, I am unsure, whether it will impose a problem.
>>>>>>>>>
>>>>>>>>> As far as I understand until now, the issue triggers on dependency
>>>>>>>>> declaration. These are - in general - expressed with 3 dimensional maven
>>>>>>>>> coordinates GroupID, artifactID and version. Of course - semantic of
>>>>>>>>> version is clear - there are only 2 dimension left to distinguish
>>>>>>>>> artefacts. As we use a single group id (org.apache.beam) there is only one
>>>>>>>>> dimension left.
>>>>>>>>>
>>>>>>>>> Now this does not impose a problem on plain library dependencies.
>>>>>>>>> Of course they are uniquely defined. But we are using also lots of project
>>>>>>>>> dependencies. This project dependencies are translated from project path to
>>>>>>>>> those maven coordinates. Unfortunately here the project name - which
>>>>>>>>> happens to be the folder name - is used as artefact id. So if folder names
>>>>>>>>> match, we might get collisions during dependency resolution.
>>>>>>>>>
>>>>>>>>> Clearly, it is not possible to deploy artefacts with those same
>>>>>>>>> ids to any maven rep expecting sensible results. So we do either not deploy
>>>>>>>>> an artefact from one of these projects - which would kind of strange as we
>>>>>>>>> do have a project dependency here - or do rewrite the artefact id of (at
>>>>>>>>> least) one of the colliding projects. ( we currently do that implicitly
>>>>>>>>> with the project name we create by flattening our structure)
>>>>>>>>>
>>>>>>>>> Now back to the given example, as I do not expect any java project
>>>>>>>>> to have a project dependency on python, there might be a chance, that this
>>>>>>>>> will just work.
>>>>>>>>>
>>>>>>>>> But of course, this does not really help, as we reasonably might
>>>>>>>>> expect some /runner/direct/core or sdks/java/io/someio/core which would
>>>>>>>>> collide in the same way.
>>>>>>>>>
>>>>>>>>> As a possible workaround here, we could
>>>>>>>>> - either require unique folder names
>>>>>>>>> - or rewrite only colliding project names (as we currently do for
>>>>>>>>> all projects)
>>>>>>>>> - or ... (do not know yet)
>>>>>>>>>
>>>>>>>>> I suggest I ll invest some time playing around improving that
>>>>>>>>> already prepared PR to support discussion. So that we have proper grounding
>>>>>>>>> to decide whether a more hierarchical project structure will be worth that
>>>>>>>>> hassle.
>>>>>>>>>
>>>>>>>>> Looking at the gradle issue - which is already 2 yrs old and iirc
>>>>>>>>> was reported already at least one year earlier - I do not expect a fix here
>>>>>>>>> soon.
>>>>>>>>>
>>>>>>>>> On Tue, Apr 2, 2019 at 7:19 PM Lukasz Cwik <lc...@google.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> I didn't know that https://github.com/gradle/gradle/issues/847 existed
>>>>>>>>>> but the description of the issues people are having are similar to what was
>>>>>>>>>> discovered during the gradle migration.
>>>>>>>>>>
>>>>>>>>>> On Tue, Apr 2, 2019 at 8:02 AM Jean-Baptiste Onofré <
>>>>>>>>>> jb@nanthrax.net> wrote:
>>>>>>>>>>
>>>>>>>>>>> Hi Michael,
>>>>>>>>>>>
>>>>>>>>>>> no problem for the thread, that's the goal of the mailing list ;)
>>>>>>>>>>>
>>>>>>>>>>> And yes, you got my idea about a "meta" module: easy way of
>>>>>>>>>>> building the
>>>>>>>>>>> "whole" Java SDK.
>>>>>>>>>>>
>>>>>>>>>>> The purpose is not to create a uber jar, but more to simplify
>>>>>>>>>>> the build
>>>>>>>>>>> for Java SDK developers.
>>>>>>>>>>>
>>>>>>>>>>> Do you want me to complete your PR with what I did ?
>>>>>>>>>>>
>>>>>>>>>>> Regards
>>>>>>>>>>> JB
>>>>>>>>>>>
>>>>>>>>>>> On 02/04/2019 16:49, Michael Luckey wrote:
>>>>>>>>>>> > Going to fork the BEAM-4046 discussion. And, JB, I apologise
>>>>>>>>>>> for
>>>>>>>>>>> > hijacking your thread.
>>>>>>>>>>> >
>>>>>>>>>>> > As for the original question, I understood a request for a
>>>>>>>>>>> meta project
>>>>>>>>>>> > which will enable easier handling of java projects. E.g.
>>>>>>>>>>> instead of
>>>>>>>>>>> > requiring the user to call
>>>>>>>>>>> >
>>>>>>>>>>> > ./gradlew module1:build module2:build ... moduleN.build
>>>>>>>>>>> >
>>>>>>>>>>> > a meta project with build task defined something about
>>>>>>>>>>> >
>>>>>>>>>>> > build.dependsOn module1:build
>>>>>>>>>>> > build.dependsOn module2:build
>>>>>>>>>>> > ...
>>>>>>>>>>> > build.dependsOn moduleN:build
>>>>>>>>>>> >
>>>>>>>>>>> > And other task as found usable.
>>>>>>>>>>> >
>>>>>>>>>>> > Not a project which in itself creates some uberjar, which I
>>>>>>>>>>> also believe
>>>>>>>>>>> > would rather difficult to implement.
>>>>>>>>>>> >
>>>>>>>>>>> > On Tue, Apr 2, 2019 at 5:13 AM Kenneth Knowles <
>>>>>>>>>>> kenn@apache.org
>>>>>>>>>>> > <ma...@apache.org>> wrote:
>>>>>>>>>>> >
>>>>>>>>>>> > Oh, yikes. It seems
>>>>>>>>>>> > like https://github.com/gradle/gradle/issues/847 indicates
>>>>>>>>>>> that the
>>>>>>>>>>> > feature to use the default names in Gradle is practically
>>>>>>>>>>> > nonfunctional. If that bug is as severe as it looks, I
>>>>>>>>>>> have to
>>>>>>>>>>> > retract my position. Like we could never have
>>>>>>>>>>> sdks/java/core and
>>>>>>>>>>> > sdks/py/core, right?
>>>>>>>>>>> >
>>>>>>>>>>> > Kenn
>>>>>>>>>>> >
>>>>>>>>>>> > On Mon, Apr 1, 2019 at 6:27 PM Michael Luckey <
>>>>>>>>>>> adude3141@gmail.com
>>>>>>>>>>> > <ma...@gmail.com>> wrote:
>>>>>>>>>>> >
>>>>>>>>>>> > FWIW, hacked something as showcase for BEAM-4046 [1]
>>>>>>>>>>> >
>>>>>>>>>>> > This is miserably broken, but a
>>>>>>>>>>> >
>>>>>>>>>>> > ./gradlew projects
>>>>>>>>>>> >
>>>>>>>>>>> > or
>>>>>>>>>>> >
>>>>>>>>>>> > ./gradlew -p sdks/java build
>>>>>>>>>>> >
>>>>>>>>>>> > should work. Anything else is likely to cause issues.
>>>>>>>>>>> If u hit
>>>>>>>>>>> > stack overflow exception, it's likely caused
>>>>>>>>>>> > by https://github.com/gradle/gradle/issues/847
>>>>>>>>>>> >
>>>>>>>>>>> > To continue here, lots of cleanup has to be done. We
>>>>>>>>>>> might also
>>>>>>>>>>> > need to rename folders etc, do better reflect semantic
>>>>>>>>>>> intentions.
>>>>>>>>>>> >
>>>>>>>>>>> > [1] https://github.com/apache/beam/pull/8194
>>>>>>>>>>> >
>>>>>>>>>>> > On Mon, Apr 1, 2019 at 11:56 PM Kenneth Knowles <
>>>>>>>>>>> kenn@apache.org
>>>>>>>>>>> > <ma...@apache.org>> wrote:
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > On Mon, Apr 1, 2019 at 2:20 PM Lukasz Cwik <
>>>>>>>>>>> lcwik@google.com
>>>>>>>>>>> > <ma...@google.com>> wrote:
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > On Mon, Apr 1, 2019 at 2:00 PM Kenneth Knowles
>>>>>>>>>>> > <kenn@apache.org <ma...@apache.org>>
>>>>>>>>>>> wrote:
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > As to building an aggregated "Java"
>>>>>>>>>>> project, I think
>>>>>>>>>>> > the blocker will be supporting conflicting
>>>>>>>>>>> deps. For
>>>>>>>>>>> > IOs like ElasticSearch and runners like
>>>>>>>>>>> Flink the
>>>>>>>>>>> > conflict is essential and deliberate, to
>>>>>>>>>>> support
>>>>>>>>>>> > multiple versions of other services. And
>>>>>>>>>>> that is not
>>>>>>>>>>> > even talking about transitive dep
>>>>>>>>>>> conflicts. I think
>>>>>>>>>>> > Python and Go don't have this issue simply
>>>>>>>>>>> because
>>>>>>>>>>> > they haven't tackled those problems.
>>>>>>>>>>> >
>>>>>>>>>>> > Are you talking about just a shortcut for
>>>>>>>>>>> building
>>>>>>>>>>> > (super easy to just add since we are using
>>>>>>>>>>> Gradle)
>>>>>>>>>>> > or a new artifact that you want to
>>>>>>>>>>> distribute?
>>>>>>>>>>> >
>>>>>>>>>>> > On Mon, Apr 1, 2019 at 10:01 AM Lukasz Cwik
>>>>>>>>>>> > <lcwik@google.com <ma...@google.com>>
>>>>>>>>>>> wrote:
>>>>>>>>>>> >
>>>>>>>>>>> > During the gradle migration, we used
>>>>>>>>>>> to have
>>>>>>>>>>> > something like:
>>>>>>>>>>> >
>>>>>>>>>>> > include(":sdks:java:core")
>>>>>>>>>>> > include(":sdks:java:extensions:sql")
>>>>>>>>>>> > include(":sdks:python")
>>>>>>>>>>> >
>>>>>>>>>>> > Just to be super clear, this is Gradle
>>>>>>>>>>> default and
>>>>>>>>>>> > is equivalent to just leaving it blank.
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > but we discovered the Maven module
>>>>>>>>>>> names that
>>>>>>>>>>> > were used during publishing were
>>>>>>>>>>> "core" / "sql"
>>>>>>>>>>> > / ... (effectively the directory name)
>>>>>>>>>>> instead
>>>>>>>>>>> > of "beam-sdks-java-core".
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > Isn't this managed by the publication
>>>>>>>>>>> > plugin?
>>>>>>>>>>> https://docs.gradle.org/current/userguide/publishing_maven.html#sec:identity_values_in_the_generated_pom
>>>>>>>>>>> "overriding
>>>>>>>>>>> > the default identity values is easy:
>>>>>>>>>>> simply specify
>>>>>>>>>>> > the groupId, artifactId or version
>>>>>>>>>>> attributes when
>>>>>>>>>>> > configuring the MavenPublication."
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > During the gradle migration this wasn't that
>>>>>>>>>>> easy. The
>>>>>>>>>>> > new maven publish plugin improved a lot since
>>>>>>>>>>> then.
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > Using the default at the time also
>>>>>>>>>>> broke the
>>>>>>>>>>> > artifact names for intra project
>>>>>>>>>>> dependencies
>>>>>>>>>>> > that we generate[1]. Finally, we also
>>>>>>>>>>> ran into
>>>>>>>>>>> > an issue because we had more then one
>>>>>>>>>>> Gradle
>>>>>>>>>>> > project with the same directory name
>>>>>>>>>>> even though
>>>>>>>>>>> > they were under a different parent
>>>>>>>>>>> folder (I
>>>>>>>>>>> > think it was "core") and that was
>>>>>>>>>>> leading to
>>>>>>>>>>> > some strange build time behavior.
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > Weird. But I think the Jira should still
>>>>>>>>>>> stand as a
>>>>>>>>>>> > move towards simplifying our build and
>>>>>>>>>>> making it
>>>>>>>>>>> > more discoverable for new contributors.
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > Agree on the JIRA makes sense, just calling
>>>>>>>>>>> out that
>>>>>>>>>>> > there were other issues that this naming had
>>>>>>>>>>> caused in
>>>>>>>>>>> > the past which should be checked before we
>>>>>>>>>>> call this done.
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > Totally agree. It will be quite a large task with
>>>>>>>>>>> a lot of
>>>>>>>>>>> > boilerplate that might not be separable from
>>>>>>>>>>> technical
>>>>>>>>>>> > blockers that come up as you go through the
>>>>>>>>>>> boilerplate.
>>>>>>>>>>> >
>>>>>>>>>>> > Kenn
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > Kenn
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > We didn't migrate to a flat project
>>>>>>>>>>> structure
>>>>>>>>>>> > where each project is a folder
>>>>>>>>>>> underneath the
>>>>>>>>>>> > root project because of the
>>>>>>>>>>> existing Maven build
>>>>>>>>>>> > rules that were being maintained in
>>>>>>>>>>> parallel and
>>>>>>>>>>> > I'm not sure if people would want to
>>>>>>>>>>> have a flat
>>>>>>>>>>> > project structure either.
>>>>>>>>>>> >
>>>>>>>>>>> > 1:
>>>>>>>>>>> https://github.com/apache/beam/blob/a85ea07b719385ec185e4fc5e4cdcc67b3598599/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L1055
>>>>>>>>>>> >
>>>>>>>>>>> > On Mon, Apr 1, 2019 at 9:49 AM Michael
>>>>>>>>>>> Luckey
>>>>>>>>>>> > <adude3141@gmail.com
>>>>>>>>>>> > <ma...@gmail.com>> wrote:
>>>>>>>>>>> >
>>>>>>>>>>> > Hi,
>>>>>>>>>>> >
>>>>>>>>>>> > although I did not yet manage to
>>>>>>>>>>> get deeper
>>>>>>>>>>> > involved into actual development,
>>>>>>>>>>> I think
>>>>>>>>>>> > this ability would be a useful
>>>>>>>>>>> addition.
>>>>>>>>>>> >
>>>>>>>>>>> > But I would also like to point
>>>>>>>>>>> out, that
>>>>>>>>>>> > this is kind of implicit, as soon
>>>>>>>>>>> we
>>>>>>>>>>> > get
>>>>>>>>>>> https://issues.apache.org/jira/browse/BEAM-4046
>>>>>>>>>>> > included.
>>>>>>>>>>> >
>>>>>>>>>>> > For instance, we would change the
>>>>>>>>>>> current
>>>>>>>>>>> > setup from
>>>>>>>>>>> >
>>>>>>>>>>> > include "beam-sdks-java-core"
>>>>>>>>>>> >
>>>>>>>>>>> project(":beam-sdks-java-core").dir = file("sdks/java/core")
>>>>>>>>>>> >
>>>>>>>>>>> > to something like
>>>>>>>>>>> >
>>>>>>>>>>> > include(":sdks:java:core")
>>>>>>>>>>> >
>>>>>>>>>>> include(":sdks:java:extensions:sql")
>>>>>>>>>>> > include(":sdks:python")
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > With this in place a plain
>>>>>>>>>>> >
>>>>>>>>>>> > $ ./gradlew -p sdks/java build
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>> > would exactly do what you want.
>>>>>>>>>>> And, of
>>>>>>>>>>> > course, this will also work for
>>>>>>>>>>> > 'sdks/java/io', 'runners/' etc.
>>>>>>>>>>> Hope, you
>>>>>>>>>>> > get the point.
>>>>>>>>>>> >
>>>>>>>>>>> > Currently, we deviate from gradle
>>>>>>>>>>> default
>>>>>>>>>>> > convention and therefore have to
>>>>>>>>>>> implement
>>>>>>>>>>> > some quirks to restore default
>>>>>>>>>>> behaviour.
>>>>>>>>>>> > And I somehow dislike the structure
>>>>>>>>>>> > introduced by parent/child
>>>>>>>>>>> folders, which
>>>>>>>>>>> > will be destroyed by our current
>>>>>>>>>>> project
>>>>>>>>>>> > definitions.
>>>>>>>>>>> >
>>>>>>>>>>> > But, to be honest, although I have
>>>>>>>>>>> some
>>>>>>>>>>> > clear understanding on how to
>>>>>>>>>>> proceed here -
>>>>>>>>>>> > especially regarding the
>>>>>>>>>>> requirement to keep
>>>>>>>>>>> > the change backwards compatible -
>>>>>>>>>>> we might
>>>>>>>>>>> > decide not to switch. Because
>>>>>>>>>>> deeper
>>>>>>>>>>> > investigation might reveal issues,
>>>>>>>>>>> which I
>>>>>>>>>>> > am currently not aware of.
>>>>>>>>>>> >
>>>>>>>>>>> > Best,
>>>>>>>>>>> >
>>>>>>>>>>> > michel
>>>>>>>>>>> >
>>>>>>>>>>> > On Mon, Apr 1, 2019 at 5:52 PM
>>>>>>>>>>> Jean-Baptiste
>>>>>>>>>>> > Onofré <jb@nanthrax.net
>>>>>>>>>>> > <ma...@nanthrax.net>> wrote:
>>>>>>>>>>> >
>>>>>>>>>>> > Hi guys,
>>>>>>>>>>> >
>>>>>>>>>>> > I would like to introduce a
>>>>>>>>>>> Gradle
>>>>>>>>>>> > "meta" project for the build:
>>>>>>>>>>> > beam-sdks-java.
>>>>>>>>>>> >
>>>>>>>>>>> > The idea is to simply build
>>>>>>>>>>> all Java SDK
>>>>>>>>>>> > related resources (core, IO,
>>>>>>>>>>> ...).
>>>>>>>>>>> >
>>>>>>>>>>> > The purpose is also to be
>>>>>>>>>>> aligned with
>>>>>>>>>>> > the other SDKs which provide
>>>>>>>>>>> > beam-sdks-go and
>>>>>>>>>>> beam-sdks-python.
>>>>>>>>>>> >
>>>>>>>>>>> > Thoughts ?
>>>>>>>>>>> >
>>>>>>>>>>> > Regards
>>>>>>>>>>> > JB
>>>>>>>>>>> > --
>>>>>>>>>>> > Jean-Baptiste Onofré
>>>>>>>>>>> > jbonofre@apache.org
>>>>>>>>>>> > <ma...@apache.org>
>>>>>>>>>>> > http://blog.nanthrax.net
>>>>>>>>>>> > Talend - http://www.talend.com
>>>>>>>>>>> >
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> Jean-Baptiste Onofré
>>>>>>>>>>> jbonofre@apache.org
>>>>>>>>>>> http://blog.nanthrax.net
>>>>>>>>>>> Talend - http://www.talend.com
>>>>>>>>>>>
>>>>>>>>>>
Re: [Forked] BEAM-4046 (was [PROPOSAL] Introduce beam-sdks-java
gradle project)
Posted by Kenneth Knowles <ke...@apache.org>.
The issue has been discussed for a full month, with no objections. I'd call
that lazy consensus. And since you have found a way to be backwards
compatible, it doesn't even have to impact docs or scripts. This is great.
Kenn
On Thu, May 2, 2019 at 8:43 AM Michael Luckey <ad...@gmail.com> wrote:
> Hi,
>
> after implementing the required changes to switch from the current flat
> Gradle project structure to the hierarchical represented by the folder
> hierarchy I propose to merge the changes [1] after cut of next release
> branch (which is scheduled around May, 8th.)
>
> Does anyone have any concerns or objections doing this change (or doing it
> now) or can we proceed as suggested? Any questions about this?
>
> Best,
>
> michel
>
> [1] https://github.com/apache/beam/pull/8194
>
>
>
> On Thu, Apr 11, 2019 at 1:04 AM Michael Luckey <ad...@gmail.com>
> wrote:
>
>> To my understanding, that's it, yes. Of course, there might be other
>> places/plugins which use plugin.group. But maven coordinates are definitely
>> those which need to be consistent.
>>
>> On Thu, Apr 11, 2019 at 12:57 AM Lukasz Cwik <lc...@google.com> wrote:
>>
>>> We may be saying the same thing but wanted to be clear that we only need
>>> to override the default that publishing plugin uses to always be
>>> "org.apache.beam" instead of defaulting to project.group
>>>
>>> On Wed, Apr 10, 2019 at 3:22 PM Kenneth Knowles <ke...@apache.org> wrote:
>>>
>>>> So, if we set the "group" on projects only as part of publishing then
>>>> everything starts to work? That sounds ideal.
>>>>
>>>> Kenn
>>>>
>>>> On Tue, Apr 9, 2019 at 3:49 PM Lukasz Cwik <lc...@google.com> wrote:
>>>>
>>>>> It would be good if we did as much as possible to make our project as
>>>>> much as a conventional Gradle project. It means that more people will be
>>>>> familiar with the setup, our setup will likely require less maintenance
>>>>> with version bumps in gradle and also that examples/solutions online will
>>>>> relate better to our project.
>>>>>
>>>>> On Mon, Apr 8, 2019 at 6:22 PM Michael Luckey <ad...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> After playing around, it turns out to be rather straightforward. The
>>>>>> problem is not really caused by a Gradle bug, but more by the usual issue
>>>>>> that deviating from gradle defaults/conventions often causes headaches.
>>>>>>
>>>>>> In this case the conflicts are caused by beam eagerly setting
>>>>>> project.group for all modules [1]. Of course this implies removing
>>>>>> structure and as such causing these name conflicts. I do not think, we need
>>>>>> to have that unique group set on our projects. So not globally rewriting,
>>>>>> but using the default group (== project.path) resolves this issue. Of
>>>>>> course, we then do have to set values accordingly on all places, which
>>>>>> default to project.group, where we would like to have our maven group id,
>>>>>> e.g. [2]
>>>>>>
>>>>>> Now before I am going to invest more time for testing, I would like
>>>>>> to start the discussion, whether we would like to move to this more
>>>>>> hierarchical project representation or prefer to stop here and stay with
>>>>>> the current state. If we prefer the current flat structure, we might
>>>>>> consider to restructure our folder hierarchy accordingly to ease lookup of
>>>>>> the code. At least we need better documentation about the projects and how
>>>>>> they relate.
>>>>>>
>>>>>> Thoughts?
>>>>>>
>>>>>> [1]
>>>>>> https://github.com/apache/beam/blob/master/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L283
>>>>>> [2]
>>>>>> https://github.com/apache/beam/blob/f9352dc7751c2c35a9189bd405e8a5ef33998b84/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L1001
>>>>>>
>>>>>> On Wed, Apr 3, 2019 at 5:54 PM Lukasz Cwik <lc...@google.com> wrote:
>>>>>>
>>>>>>> As a minor point, we do have some cross language dependencies, for
>>>>>>> example:
>>>>>>> * the portability related proto projects are intended to be consumed
>>>>>>> by Go, Java and Python
>>>>>>> * the docker container gradle projects contain other applications
>>>>>>> (e.g. go boot code) that are placed inside the docker container that
>>>>>>> contain the language specific SDK harness. There will likely be additional
>>>>>>> applications that are separate from the SDK harness like a docker container
>>>>>>> health checker that are placed in there as well
>>>>>>>
>>>>>>> On Tue, Apr 2, 2019 at 3:21 PM Michael Luckey <ad...@gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> agree with Kenn, that this issue at least renders the default
>>>>>>>> implementation difficult to use.
>>>>>>>>
>>>>>>>> Although in the example given, i.e. having sdks/java/core and
>>>>>>>> sdks/py/core, I am unsure, whether it will impose a problem.
>>>>>>>>
>>>>>>>> As far as I understand until now, the issue triggers on dependency
>>>>>>>> declaration. These are - in general - expressed with 3 dimensional maven
>>>>>>>> coordinates GroupID, artifactID and version. Of course - semantic of
>>>>>>>> version is clear - there are only 2 dimension left to distinguish
>>>>>>>> artefacts. As we use a single group id (org.apache.beam) there is only one
>>>>>>>> dimension left.
>>>>>>>>
>>>>>>>> Now this does not impose a problem on plain library dependencies.
>>>>>>>> Of course they are uniquely defined. But we are using also lots of project
>>>>>>>> dependencies. This project dependencies are translated from project path to
>>>>>>>> those maven coordinates. Unfortunately here the project name - which
>>>>>>>> happens to be the folder name - is used as artefact id. So if folder names
>>>>>>>> match, we might get collisions during dependency resolution.
>>>>>>>>
>>>>>>>> Clearly, it is not possible to deploy artefacts with those same ids
>>>>>>>> to any maven rep expecting sensible results. So we do either not deploy an
>>>>>>>> artefact from one of these projects - which would kind of strange as we do
>>>>>>>> have a project dependency here - or do rewrite the artefact id of (at
>>>>>>>> least) one of the colliding projects. ( we currently do that implicitly
>>>>>>>> with the project name we create by flattening our structure)
>>>>>>>>
>>>>>>>> Now back to the given example, as I do not expect any java project
>>>>>>>> to have a project dependency on python, there might be a chance, that this
>>>>>>>> will just work.
>>>>>>>>
>>>>>>>> But of course, this does not really help, as we reasonably might
>>>>>>>> expect some /runner/direct/core or sdks/java/io/someio/core which would
>>>>>>>> collide in the same way.
>>>>>>>>
>>>>>>>> As a possible workaround here, we could
>>>>>>>> - either require unique folder names
>>>>>>>> - or rewrite only colliding project names (as we currently do for
>>>>>>>> all projects)
>>>>>>>> - or ... (do not know yet)
>>>>>>>>
>>>>>>>> I suggest I ll invest some time playing around improving that
>>>>>>>> already prepared PR to support discussion. So that we have proper grounding
>>>>>>>> to decide whether a more hierarchical project structure will be worth that
>>>>>>>> hassle.
>>>>>>>>
>>>>>>>> Looking at the gradle issue - which is already 2 yrs old and iirc
>>>>>>>> was reported already at least one year earlier - I do not expect a fix here
>>>>>>>> soon.
>>>>>>>>
>>>>>>>> On Tue, Apr 2, 2019 at 7:19 PM Lukasz Cwik <lc...@google.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> I didn't know that https://github.com/gradle/gradle/issues/847 existed
>>>>>>>>> but the description of the issues people are having are similar to what was
>>>>>>>>> discovered during the gradle migration.
>>>>>>>>>
>>>>>>>>> On Tue, Apr 2, 2019 at 8:02 AM Jean-Baptiste Onofré <
>>>>>>>>> jb@nanthrax.net> wrote:
>>>>>>>>>
>>>>>>>>>> Hi Michael,
>>>>>>>>>>
>>>>>>>>>> no problem for the thread, that's the goal of the mailing list ;)
>>>>>>>>>>
>>>>>>>>>> And yes, you got my idea about a "meta" module: easy way of
>>>>>>>>>> building the
>>>>>>>>>> "whole" Java SDK.
>>>>>>>>>>
>>>>>>>>>> The purpose is not to create a uber jar, but more to simplify the
>>>>>>>>>> build
>>>>>>>>>> for Java SDK developers.
>>>>>>>>>>
>>>>>>>>>> Do you want me to complete your PR with what I did ?
>>>>>>>>>>
>>>>>>>>>> Regards
>>>>>>>>>> JB
>>>>>>>>>>
>>>>>>>>>> On 02/04/2019 16:49, Michael Luckey wrote:
>>>>>>>>>> > Going to fork the BEAM-4046 discussion. And, JB, I apologise for
>>>>>>>>>> > hijacking your thread.
>>>>>>>>>> >
>>>>>>>>>> > As for the original question, I understood a request for a meta
>>>>>>>>>> project
>>>>>>>>>> > which will enable easier handling of java projects. E.g.
>>>>>>>>>> instead of
>>>>>>>>>> > requiring the user to call
>>>>>>>>>> >
>>>>>>>>>> > ./gradlew module1:build module2:build ... moduleN.build
>>>>>>>>>> >
>>>>>>>>>> > a meta project with build task defined something about
>>>>>>>>>> >
>>>>>>>>>> > build.dependsOn module1:build
>>>>>>>>>> > build.dependsOn module2:build
>>>>>>>>>> > ...
>>>>>>>>>> > build.dependsOn moduleN:build
>>>>>>>>>> >
>>>>>>>>>> > And other task as found usable.
>>>>>>>>>> >
>>>>>>>>>> > Not a project which in itself creates some uberjar, which I
>>>>>>>>>> also believe
>>>>>>>>>> > would rather difficult to implement.
>>>>>>>>>> >
>>>>>>>>>> > On Tue, Apr 2, 2019 at 5:13 AM Kenneth Knowles <kenn@apache.org
>>>>>>>>>> > <ma...@apache.org>> wrote:
>>>>>>>>>> >
>>>>>>>>>> > Oh, yikes. It seems
>>>>>>>>>> > like https://github.com/gradle/gradle/issues/847 indicates
>>>>>>>>>> that the
>>>>>>>>>> > feature to use the default names in Gradle is practically
>>>>>>>>>> > nonfunctional. If that bug is as severe as it looks, I have
>>>>>>>>>> to
>>>>>>>>>> > retract my position. Like we could never have
>>>>>>>>>> sdks/java/core and
>>>>>>>>>> > sdks/py/core, right?
>>>>>>>>>> >
>>>>>>>>>> > Kenn
>>>>>>>>>> >
>>>>>>>>>> > On Mon, Apr 1, 2019 at 6:27 PM Michael Luckey <
>>>>>>>>>> adude3141@gmail.com
>>>>>>>>>> > <ma...@gmail.com>> wrote:
>>>>>>>>>> >
>>>>>>>>>> > FWIW, hacked something as showcase for BEAM-4046 [1]
>>>>>>>>>> >
>>>>>>>>>> > This is miserably broken, but a
>>>>>>>>>> >
>>>>>>>>>> > ./gradlew projects
>>>>>>>>>> >
>>>>>>>>>> > or
>>>>>>>>>> >
>>>>>>>>>> > ./gradlew -p sdks/java build
>>>>>>>>>> >
>>>>>>>>>> > should work. Anything else is likely to cause issues.
>>>>>>>>>> If u hit
>>>>>>>>>> > stack overflow exception, it's likely caused
>>>>>>>>>> > by https://github.com/gradle/gradle/issues/847
>>>>>>>>>> >
>>>>>>>>>> > To continue here, lots of cleanup has to be done. We
>>>>>>>>>> might also
>>>>>>>>>> > need to rename folders etc, do better reflect semantic
>>>>>>>>>> intentions.
>>>>>>>>>> >
>>>>>>>>>> > [1] https://github.com/apache/beam/pull/8194
>>>>>>>>>> >
>>>>>>>>>> > On Mon, Apr 1, 2019 at 11:56 PM Kenneth Knowles <
>>>>>>>>>> kenn@apache.org
>>>>>>>>>> > <ma...@apache.org>> wrote:
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > On Mon, Apr 1, 2019 at 2:20 PM Lukasz Cwik <
>>>>>>>>>> lcwik@google.com
>>>>>>>>>> > <ma...@google.com>> wrote:
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > On Mon, Apr 1, 2019 at 2:00 PM Kenneth Knowles
>>>>>>>>>> > <kenn@apache.org <ma...@apache.org>>
>>>>>>>>>> wrote:
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > As to building an aggregated "Java"
>>>>>>>>>> project, I think
>>>>>>>>>> > the blocker will be supporting conflicting
>>>>>>>>>> deps. For
>>>>>>>>>> > IOs like ElasticSearch and runners like
>>>>>>>>>> Flink the
>>>>>>>>>> > conflict is essential and deliberate, to
>>>>>>>>>> support
>>>>>>>>>> > multiple versions of other services. And
>>>>>>>>>> that is not
>>>>>>>>>> > even talking about transitive dep
>>>>>>>>>> conflicts. I think
>>>>>>>>>> > Python and Go don't have this issue simply
>>>>>>>>>> because
>>>>>>>>>> > they haven't tackled those problems.
>>>>>>>>>> >
>>>>>>>>>> > Are you talking about just a shortcut for
>>>>>>>>>> building
>>>>>>>>>> > (super easy to just add since we are using
>>>>>>>>>> Gradle)
>>>>>>>>>> > or a new artifact that you want to
>>>>>>>>>> distribute?
>>>>>>>>>> >
>>>>>>>>>> > On Mon, Apr 1, 2019 at 10:01 AM Lukasz Cwik
>>>>>>>>>> > <lcwik@google.com <ma...@google.com>>
>>>>>>>>>> wrote:
>>>>>>>>>> >
>>>>>>>>>> > During the gradle migration, we used to
>>>>>>>>>> have
>>>>>>>>>> > something like:
>>>>>>>>>> >
>>>>>>>>>> > include(":sdks:java:core")
>>>>>>>>>> > include(":sdks:java:extensions:sql")
>>>>>>>>>> > include(":sdks:python")
>>>>>>>>>> >
>>>>>>>>>> > Just to be super clear, this is Gradle
>>>>>>>>>> default and
>>>>>>>>>> > is equivalent to just leaving it blank.
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > but we discovered the Maven module
>>>>>>>>>> names that
>>>>>>>>>> > were used during publishing were "core"
>>>>>>>>>> / "sql"
>>>>>>>>>> > / ... (effectively the directory name)
>>>>>>>>>> instead
>>>>>>>>>> > of "beam-sdks-java-core".
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > Isn't this managed by the publication
>>>>>>>>>> > plugin?
>>>>>>>>>> https://docs.gradle.org/current/userguide/publishing_maven.html#sec:identity_values_in_the_generated_pom
>>>>>>>>>> "overriding
>>>>>>>>>> > the default identity values is easy: simply
>>>>>>>>>> specify
>>>>>>>>>> > the groupId, artifactId or version
>>>>>>>>>> attributes when
>>>>>>>>>> > configuring the MavenPublication."
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > During the gradle migration this wasn't that
>>>>>>>>>> easy. The
>>>>>>>>>> > new maven publish plugin improved a lot since
>>>>>>>>>> then.
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > Using the default at the time also
>>>>>>>>>> broke the
>>>>>>>>>> > artifact names for intra project
>>>>>>>>>> dependencies
>>>>>>>>>> > that we generate[1]. Finally, we also
>>>>>>>>>> ran into
>>>>>>>>>> > an issue because we had more then one
>>>>>>>>>> Gradle
>>>>>>>>>> > project with the same directory name
>>>>>>>>>> even though
>>>>>>>>>> > they were under a different parent
>>>>>>>>>> folder (I
>>>>>>>>>> > think it was "core") and that was
>>>>>>>>>> leading to
>>>>>>>>>> > some strange build time behavior.
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > Weird. But I think the Jira should still
>>>>>>>>>> stand as a
>>>>>>>>>> > move towards simplifying our build and
>>>>>>>>>> making it
>>>>>>>>>> > more discoverable for new contributors.
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > Agree on the JIRA makes sense, just calling out
>>>>>>>>>> that
>>>>>>>>>> > there were other issues that this naming had
>>>>>>>>>> caused in
>>>>>>>>>> > the past which should be checked before we call
>>>>>>>>>> this done.
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > Totally agree. It will be quite a large task with a
>>>>>>>>>> lot of
>>>>>>>>>> > boilerplate that might not be separable from
>>>>>>>>>> technical
>>>>>>>>>> > blockers that come up as you go through the
>>>>>>>>>> boilerplate.
>>>>>>>>>> >
>>>>>>>>>> > Kenn
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > Kenn
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > We didn't migrate to a flat project
>>>>>>>>>> structure
>>>>>>>>>> > where each project is a folder
>>>>>>>>>> underneath the
>>>>>>>>>> > root project because of the
>>>>>>>>>> existing Maven build
>>>>>>>>>> > rules that were being maintained in
>>>>>>>>>> parallel and
>>>>>>>>>> > I'm not sure if people would want to
>>>>>>>>>> have a flat
>>>>>>>>>> > project structure either.
>>>>>>>>>> >
>>>>>>>>>> > 1:
>>>>>>>>>> https://github.com/apache/beam/blob/a85ea07b719385ec185e4fc5e4cdcc67b3598599/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy#L1055
>>>>>>>>>> >
>>>>>>>>>> > On Mon, Apr 1, 2019 at 9:49 AM Michael
>>>>>>>>>> Luckey
>>>>>>>>>> > <adude3141@gmail.com
>>>>>>>>>> > <ma...@gmail.com>> wrote:
>>>>>>>>>> >
>>>>>>>>>> > Hi,
>>>>>>>>>> >
>>>>>>>>>> > although I did not yet manage to
>>>>>>>>>> get deeper
>>>>>>>>>> > involved into actual development, I
>>>>>>>>>> think
>>>>>>>>>> > this ability would be a useful
>>>>>>>>>> addition.
>>>>>>>>>> >
>>>>>>>>>> > But I would also like to point out,
>>>>>>>>>> that
>>>>>>>>>> > this is kind of implicit, as soon we
>>>>>>>>>> > get
>>>>>>>>>> https://issues.apache.org/jira/browse/BEAM-4046
>>>>>>>>>> > included.
>>>>>>>>>> >
>>>>>>>>>> > For instance, we would change the
>>>>>>>>>> current
>>>>>>>>>> > setup from
>>>>>>>>>> >
>>>>>>>>>> > include "beam-sdks-java-core"
>>>>>>>>>> > project(":beam-sdks-java-core").dir
>>>>>>>>>> = file("sdks/java/core")
>>>>>>>>>> >
>>>>>>>>>> > to something like
>>>>>>>>>> >
>>>>>>>>>> > include(":sdks:java:core")
>>>>>>>>>> > include(":sdks:java:extensions:sql")
>>>>>>>>>> > include(":sdks:python")
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > With this in place a plain
>>>>>>>>>> >
>>>>>>>>>> > $ ./gradlew -p sdks/java build
>>>>>>>>>> >
>>>>>>>>>> >
>>>>>>>>>> > would exactly do what you want.
>>>>>>>>>> And, of
>>>>>>>>>> > course, this will also work for
>>>>>>>>>> > 'sdks/java/io', 'runners/' etc.
>>>>>>>>>> Hope, you
>>>>>>>>>> > get the point.
>>>>>>>>>> >
>>>>>>>>>> > Currently, we deviate from gradle
>>>>>>>>>> default
>>>>>>>>>> > convention and therefore have to
>>>>>>>>>> implement
>>>>>>>>>> > some quirks to restore default
>>>>>>>>>> behaviour.
>>>>>>>>>> > And I somehow dislike the structure
>>>>>>>>>> > introduced by parent/child folders,
>>>>>>>>>> which
>>>>>>>>>> > will be destroyed by our current
>>>>>>>>>> project
>>>>>>>>>> > definitions.
>>>>>>>>>> >
>>>>>>>>>> > But, to be honest, although I have
>>>>>>>>>> some
>>>>>>>>>> > clear understanding on how to
>>>>>>>>>> proceed here -
>>>>>>>>>> > especially regarding the
>>>>>>>>>> requirement to keep
>>>>>>>>>> > the change backwards compatible -
>>>>>>>>>> we might
>>>>>>>>>> > decide not to switch. Because deeper
>>>>>>>>>> > investigation might reveal issues,
>>>>>>>>>> which I
>>>>>>>>>> > am currently not aware of.
>>>>>>>>>> >
>>>>>>>>>> > Best,
>>>>>>>>>> >
>>>>>>>>>> > michel
>>>>>>>>>> >
>>>>>>>>>> > On Mon, Apr 1, 2019 at 5:52 PM
>>>>>>>>>> Jean-Baptiste
>>>>>>>>>> > Onofré <jb@nanthrax.net
>>>>>>>>>> > <ma...@nanthrax.net>> wrote:
>>>>>>>>>> >
>>>>>>>>>> > Hi guys,
>>>>>>>>>> >
>>>>>>>>>> > I would like to introduce a
>>>>>>>>>> Gradle
>>>>>>>>>> > "meta" project for the build:
>>>>>>>>>> > beam-sdks-java.
>>>>>>>>>> >
>>>>>>>>>> > The idea is to simply build all
>>>>>>>>>> Java SDK
>>>>>>>>>> > related resources (core, IO,
>>>>>>>>>> ...).
>>>>>>>>>> >
>>>>>>>>>> > The purpose is also to be
>>>>>>>>>> aligned with
>>>>>>>>>> > the other SDKs which provide
>>>>>>>>>> > beam-sdks-go and
>>>>>>>>>> beam-sdks-python.
>>>>>>>>>> >
>>>>>>>>>> > Thoughts ?
>>>>>>>>>> >
>>>>>>>>>> > Regards
>>>>>>>>>> > JB
>>>>>>>>>> > --
>>>>>>>>>> > Jean-Baptiste Onofré
>>>>>>>>>> > jbonofre@apache.org
>>>>>>>>>> > <ma...@apache.org>
>>>>>>>>>> > http://blog.nanthrax.net
>>>>>>>>>> > Talend - http://www.talend.com
>>>>>>>>>> >
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Jean-Baptiste Onofré
>>>>>>>>>> jbonofre@apache.org
>>>>>>>>>> http://blog.nanthrax.net
>>>>>>>>>> Talend - http://www.talend.com
>>>>>>>>>>
>>>>>>>>>