play no play nice

[Adrian Cole]

Hi, all.

It has been raised to my attention that recent jclouds isn't naturally
compatible with Play (even 2.0). This is due to an upstream issue in
reflections, which doesn't support recent versions of guava [1].

This is totally solvable in the mean time, so I'll throw an example on
jclouds-examples shortly. Sorry about the glitch.

Cheers,
-A

[1] https://code.google.com/p/reflections/issues/detail?id=94

[Adrian Cole]

Ok.

Here are the key things:

1. make sure a patched version of the guava-incompatible
JavassistAdapter is in your project:

https://github.com/jclouds/jclouds-examples/blob/master/play-compute/app/org/reflections/adapters/JavassistAdapter.java

2. make sure your deps are explicit and w/repos:
val appDependencies = Seq(
"com.google.guava" % "guava" % "12.0-rc2",
"org.jclouds" % "jclouds-compute" % "1.5.0-alpha.5"
)

val main = PlayProject(appName, appVersion, appDependencies,
mainLang = JAVA).settings(
resolvers += "Maven central" at "http://repo1.maven.org/maven2/",
resolvers += "Sonatype snapshots" at
"https://oss.sonatype.org/content/repositories/snapshots"
)
https://github.com/jclouds/jclouds-examples/blob/master/play-compute/project/Build.scala

ok. that should get folks working until upstream is sorted!

-A

[Andrea]

Hi there,

thanks for the play-compute example.

Unfortunately if DB plugin is enabled on a play project, like I did on the play-compute example here

https://github.com/jclouds/jclouds-examples/commit/e520785db0624c063d4cd006a28f1c5db57bcb45

the reflections issue due to guava-incompatible is still there (well know bug as documented here http://code.google.com/p/reflections/issues/detail?id=94).

Do you have any idea/suggestion to workaround this problem?

It is really important,

Andrea 

[Andrea]

Thanks to Ivan Meredith that helped me on patching reflections, I've unblocked the situation.

To replicate my working environment you have to

clone this repo https://github.com/hadashi/reflections.git, which is a clone of reflections repo + patch

mvn install -DskipTests=true

(tests are not all passing and maven plugin for reflections will fail as well)

then you need to add to your Build.scala

    val appDependencies = Seq(

      ....

      "org.reflections" % "reflections" % "0.9.7-SNAPSHOT"

    )

    val main = PlayProject(appName, appVersion, appDependencies, mainLang = JAVA).settings(

      // temporary hack waiting for a public maven repo where to push the patched jar

      resolvers += "Local Maven Repository" at "file://"+Path.userHome+"/.m2/repository",

     .....

}

the Local Maven Repository will be removed as soon as Ivan will push the reflections-0.9.7-SNAPSHOT to a public maven repo.

- run "play dependencies"

- run "play run"

You can checkout an updated version of play-compute with this patched version:

https://github.com/jclouds/jclouds-examples/tree/master/play-compute

Cheers,

Andrea

[Adrian Cole]

This is great to hear!

Out of courtesy to others outside jclouds, can you update the reflections issue with the repo instructions?

-A

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[Andrea Turli]

The reflections issue n. 94 is updated
http://code.google.com/p/reflections/issues/detail?can=2&start=0&num=100&q=&colspec=ID%20Type%20Status%20Priority%20Milestone%20Owner%20Summary&groupby=&sort=&id=94

Andrea