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POPlay framework: Running separate module of multi-module application
 

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  1. POPlay framework: Running separate module of multi-module application
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    <p>I'm trying to create a multi-module application and run one of it's modules separately from the others (from another machine). Project structure looks like this: </p> <pre><code> main / \ module1 module2 </code></pre> <p>I want to run a module1 as a separate jar file (or there is a better way of doing this?), which I will run from another machine (I want to connect it to the main app using Akka remoting). </p> <p>What I'm doing:</p> <ol> <li>Running "play dist" command </li> <li>Unzipping module1.zip from universal folder </li> <li>Setting +x mode to bin/module1 executable. </li> <li>Setting my main class (will paste it below): instead of <code>play.core.server.NettyServer</code> im putting my main class: <code>declare -r app_mainclass="module1.foo.Launcher"</code> </li> <li>Running with external application.conf file.</li> </ol> <p>Here is my main class:</p> <pre><code>class LauncherActor extends Actor { def receive = { case a =&gt; println(s"Received msg: $a ") } } object Launcher extends App { val system = ActorSystem("testsystem") val listener = system.actorOf(Props[LauncherActor], name = "listener") println(listener.path) listener ! "hi!" println("Server ready") } </code></pre> <p>Here is the console output:</p> <pre><code>@pavel bin$ ./module1 -Dconfig.file=/Users/pavel/projects/foobar/conf/application.conf [WARN] [10/18/2013 18:56:03.036] [main] [EventStream(akka://testsystem)] [akka.event-handlers] config is deprecated, use [akka.loggers] akka://testsystem/user/listener Server ready Received msg: hi! @pavel bin$ </code></pre> <p>So the system switches off as soon as it gets to the last line of the main method. If I run this code without Play - it works as expected, the object is loaded and it waits for messages, which is expected behavior. </p> <p>Maybe I'm doing something wrong? Or should I set some options in module1 executable? Other ideas? </p> <p>Thanks in advance!</p> <p>Update: Versions:</p> <ul> <li>Scala - 2.10.3 </li> <li>Play! - 2.2.0</li> <li>SBT - 0.13.0</li> <li>Akka - 2.2.1</li> <li>Java 1.7 and 1.6 (tried both)</li> </ul> <p>Build properties:</p> <pre><code>lazy val projectSettings = buildSettings ++ play.Project.playScalaSettings ++ Seq(resolvers := buildResolvers, libraryDependencies ++= dependencies) ++ Seq(scalacOptions += "-language:postfixOps", javaOptions in run ++= Seq( "-XX:MaxPermSize=1024m", "-Xmx4048m" ), Keys.fork in run := true) lazy val common = play.Project("common", buildVersion, dependencies, path = file("modules/common")) lazy val root = play.Project(appName, buildVersion, settings = projectSettings).settings( resolvers ++= buildResolvers ).dependsOn(common, module1, module2).aggregate(common, module1, module2) lazy val module1 = play.Project("module1", buildVersion, path = file("modules/module1")).dependsOn(common).aggregate(common) lazy val module2: Project = play.Project("module2", buildVersion, path = file("modules/module2")).dependsOn(common).aggregate(common) </code></pre>
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    1. COCan you give us the SBT settings? I don't even know the Play/Scala/SBT/JDK version and if all projects are Play projects. I think it is very time-consuming to reproduce your error.
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    2. COUpdated the post. Actually, I wasn't expecting that someone will try to reproduce the issue, but it would be really helpful. I was hoping that I'm doing something wrong or the whole idea of how I split the application between machines is wrong and I should do in some other way. Thought someone already faced similar issue and got a better idea of doing such things :)
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