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POHow to set up a minimal Maven pom.xml file for a Heroku worker process in Java?
 

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  1. POHow to set up a minimal Maven pom.xml file for a Heroku worker process in Java?
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    <p>First off: I'm not a Java coder. I'm new to the Java/Maven tool chain. We're using a Java library for a project which we want to launch as a Heroku background worker.</p> <p>This project relies on two external libraries, the mongodb Java driver which is available through Maven's central repo, and another third party library. I've seen the <a href="https://devcenter.heroku.com/articles/local-maven-dependencies" rel="nofollow">Heroku article on "unmanaged dependencies"</a>, but something else appears missing, as I get an error like: <code>Could not find the main class: com.company.myproject.MyApp Program will exit.</code> when I try to run the app locally according to <a href="https://devcenter.heroku.com/articles/java#build_and_run_your_app_locally" rel="nofollow">Heroku's instructions on "Getting Started with Java"</a>.</p> <p>I noticed that their pom.xml file contains a Maven plugin <code>maven-dependency-plugin</code> to copy dependencies, and when I check my <code>target/classes</code> folder, I don't see any of the dependencies.</p> <p>Heroku also publishes a <a href="https://devcenter.heroku.com/articles/run-non-web-java-processes-on-heroku" rel="nofollow">guide on building background workers in Java</a>. That <code>pom.xml</code> contains a build assembly plugin, which seems more complex.</p> <p>I'm a bit lost in all this ceremony (especially coming from Rails), and I'd like to stat with the simplest possible <code>pom.xml</code> to get this running. Is there a Maven archetype file for Java workers on Heroku? I'm also using NetBeans as IDE, and it would be great to use the IDE tools for this, if available, but it's a secondary priority.</p> <p>Below my <code>pom.xml</code> so far:</p> <pre><code>&lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"&gt; &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; &lt;groupId&gt;com.myproject&lt;/groupId&gt; &lt;artifactId&gt;myproject&lt;/artifactId&gt; &lt;version&gt;0.1&lt;/version&gt; &lt;packaging&gt;jar&lt;/packaging&gt; &lt;name&gt;myproject&lt;/name&gt; &lt;url&gt;http://maven.apache.org&lt;/url&gt; &lt;properties&gt; &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt; &lt;/properties&gt; &lt;dependencies&gt; &lt;dependency&gt; &lt;groupId&gt;junit&lt;/groupId&gt; &lt;artifactId&gt;junit&lt;/artifactId&gt; &lt;version&gt;3.8.1&lt;/version&gt; &lt;scope&gt;test&lt;/scope&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.mongodb&lt;/groupId&gt; &lt;artifactId&gt;mongo-java-driver&lt;/artifactId&gt; &lt;version&gt;2.7.3&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.thirdparty&lt;/groupId&gt; &lt;artifactId&gt;thirdparty&lt;/artifactId&gt; &lt;version&gt;0.2.9&lt;/version&gt; &lt;scope&gt;provided&lt;/scope&gt; &lt;/dependency&gt; &lt;/dependencies&gt; &lt;repositories&gt; &lt;repository&gt; &lt;id&gt;project-local&lt;/id&gt; &lt;name&gt;Project-local Repo&lt;/name&gt; &lt;url&gt;file:${project.basedir}/repo&lt;/url&gt; &lt;/repository&gt; &lt;/repositories&gt; &lt;/project&gt; </code></pre>
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    1. USWolfram Arnold
    1. USWolfram Arnold
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    1. COI figured out something: The `<provided>` tag is BAD. I forget where I got this from, but it screws things up. Once I took it out, Maven built and ran, even from within NetBeans.
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      1. POHow to set up a minimal Maven pom.xml file for a Heroku worker process in Java?
      1. USWolfram Arnold
    2. COThe `<provided>` tag means that the library will be provided in some external way.
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      1. POHow to set up a minimal Maven pom.xml file for a Heroku worker process in Java?
      1. USJames Ward
    3. COmaybe [jcabi-heroku-maven-plugin](http://www.jcabi.com/jcabi-heroku-maven-plugin/) may help you
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      1. POHow to set up a minimal Maven pom.xml file for a Heroku worker process in Java?
      1. USyegor256
 

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