Starting Cockpit in Embedded mode

Camunda 7 Topics Discussion & Questions
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1

I’m trying to deploy Cockpit on jetty using embedded mode.
Here is the main class I used for this:

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I run this class using these commands:
mvn exec:java -Dexec.mainClass=“org.camunda.bpm.Main”
but I got this exception:
2020-05-05 17:50:22.638:WARN:oejuc.AbstractLifeCycle:FAILED o.e.j.w.WebAppContext{/camunda,file:/home/shehab/git/webalo/camunda-bpm-webapp/src/main/java/org/camunda/bpm/cockpit/impl/web/bootstrap/}: java.lang.NoClassDefFoundError: org/camunda/bpm/engine/ProcessEngineException
java.lang.NoClassDefFoundError: org/camunda/bpm/engine/ProcessEngineException
at org.camunda.bpm.cockpit.impl.web.bootstrap.CockpitContainerBootstrap$CockpitEnvironment.setup(CockpitContainerBootstrap.java:61)
at org.camunda.bpm.cockpit.impl.web.bootstrap.CockpitContainerBootstrap.contextInitialized(CockpitContainerBootstrap.java:40)
at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:782)
at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:424)
at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:774)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:249)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1242)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:717)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:494)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:95)
at org.eclipse.jetty.server.Server.doStart(Server.java:282)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.camunda.bpm.Main.main(Main.java:85)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
at java.lang.Thread.run(Thread.java:748)

2

If I had to guess, you’re missing a number of dependencies (e.g. camunda-engine). Take a closer look at the project dependencies and make sure you have the necessary ones available on your class path.

Maybe even start with mvn jetty:run -Pdevelop.

3

Thank you for your response.
I think I have included them all.

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Actually this main runs well when using webAppContext.setWar(). So I think there isn’t any problem with the project configuration.

Do you think mvn jetty:run -Pdevelop will run my Main class too ?

4

No, I just meant mvn jetty:run -Pdevelop from the camunda-bpm-webapp project just to get you started with something, but it sounds like you have something running already.

The profile snippet you posted, is that from your pom? I wouldn’t expect those dependencies to be pulled in if you’re running mvn exec:java -Dexec.mainClass=“org.camunda.bpm.Main”.

Can you share your project on Github or somewhere similar? It’s hard to say without knowing more about your setup, but your stack is fairly straightforward with java.lang.NoClassDefFoundError.

5

Yes, It’s from my pom. I could run the project on jetty using mvn jetty:run -Pdevelop.
But I’m trying to run jetty in embedded mode so I made .war file from my project and make small main that uses webAppContext.setWar it works fine. But now I’m trying to make a self-executable war. So I added the main class into the camunda project it self.
The project tree is like:

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This project was cloned from: git clone git@github.com:camunda/camunda-bpm-webapp.git

6

I still think you’re having dependencies issues based on the maven command you’re running. Notice, mvn -Pdevelop exec:java -Dexec.mainClass=“org.camunda.bpm.Main” gives you a different result.

It’s hard to make a recommendation for a project structure without having a better idea of what you’re trying to achieve. Even harder trying to wedge it in the context of the camunda-bpm-webapp project.

2 Likes
7

Thanks this command works with me.