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From Hermann Matthes <hermann.matt...@web.de>
Subject Re: newbee question
Date Mon, 06 Jan 2014 14:27:53 GMT
Hello Clement,
thnaks a lot for the quick answer.
When I set the LogServervice to optional and reinstall the module, I get 
the following log error meeesage during "start":

2014-01-06 15:19:34,517 | ERROR |  pool-1-thread-1 | 
server                           | ?                                   ? 
| 96 - server - 1.0.0.SNAPSHOT | [ERROR]  : 
[de.hermannmatthes.workbench.server.ServerImpl-0] createInstance -> The 
POJO constructor invocation failed : Expecting a stackmap frame at 
branch target 12 in method 
de.hermannmatthes.workbench.server.ServerImpl.start()V at offset 4
java.lang.VerifyError: Expecting a stackmap frame at branch target 12 in 
method de.hermannmatthes.workbench.server.ServerImpl.start()V at offset 4
     at java.lang.Class.getDeclaredConstructors0(Native Method)[:1.7.0_07]
     at 
java.lang.Class.privateGetDeclaredConstructors(Class.java:2404)[:1.7.0_07]
     at java.lang.Class.getConstructor0(Class.java:2714)[:1.7.0_07]
     at java.lang.Class.getDeclaredConstructor(Class.java:2002)[:1.7.0_07]
     at 
org.apache.felix.ipojo.InstanceManager.createObject(InstanceManager.java:715)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.InstanceManager.getPojoObject(InstanceManager.java:923)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.handlers.lifecycle.callback.LifecycleCallbackHandler.__M_stateChanged(LifecycleCallbackHandler.java:156)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.handlers.lifecycle.callback.LifecycleCallbackHandler.stateChanged(LifecycleCallbackHandler.java)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.InstanceManager.setState(InstanceManager.java:536)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.InstanceManager.start(InstanceManager.java:418)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.ComponentFactory.createInstance(ComponentFactory.java:179)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.IPojoFactory.createComponentInstance(IPojoFactory.java:319)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.IPojoFactory.createComponentInstance(IPojoFactory.java:240)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.extender.internal.linker.ManagedType$InstanceSupport$1.call(ManagedType.java:312)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.extender.internal.linker.ManagedType$InstanceSupport$1.call(ManagedType.java:306)[84:org.apache.felix.ipojo:1.11.0]
     at 
org.apache.felix.ipojo.extender.internal.queue.JobInfoCallable.call(JobInfoCallable.java:114)[84:org.apache.felix.ipojo:1.11.0]
     at 
java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)[:1.7.0_07]
     at java.util.concurrent.FutureTask.run(FutureTask.java:166)[:1.7.0_07]
     at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)[:1.7.0_07]
     at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)[:1.7.0_07]
     at java.lang.Thread.run(Thread.java:722)[:1.7.0_07]
2014-01-06 15:19:34,517 | ERROR |  pool-1-thread-1 | 
server                           | ?                                   ? 
| 96 - server - 1.0.0.SNAPSHOT | [ERROR] 
de.hermannmatthes.workbench.server.ServerImpl : Cannot create a POJO 
instance, the POJO constructor invocation has thrown an exception

Does anybody know what's the reason for that error?

Hermann

Am 06.01.2014 07:42, schrieb Clement Escoffier:
> Hi,
>
> On 5 janv. 2014, at 20:07, Hermann Matthes <hermann.matthes@gmx.de> wrote:
>
>> Hello everybody,
>> I try to learn ipojo to implement a simple server using Netbeans 7.4 and Apache Karaf.
>>
>> My first goal is to write a really simple server which just prints a message when
it's activated or deactivated. No tutorial which I found gave enough information to perform
such a simple task.
>>
>> Here's my code:
>>
>> The server interface:
>>
>> package de.hermannmatthes.workbench.server;
>> public interface Server {
>>      public void start();
>>      public void stop();
>> }
>>
>> The server implementation:
>>
>> package de.hermannmatthes.workbench.server;
>>
>> import java.io.FileWriter;
>> import java.io.IOException;
>> import java.util.logging.Level;
>> import java.util.logging.Logger;
>> import org.apache.felix.ipojo.annotations.Component;
>> import org.apache.felix.ipojo.annotations.Instantiate;
>> import org.apache.felix.ipojo.annotations.Invalidate;
>> import org.apache.felix.ipojo.annotations.Requires;
>> import org.apache.felix.ipojo.annotations.Validate;
>> import org.osgi.service.log.LogService;
>>
>> @Component(immediate=true)
>> @Instantiate
>> public class ServerImpl implements Server {
>>
>>      @Requires(policy="static")
>>      private LogService log;
>>      
>>      @Override
>>      @Validate
>>      public void start() {
>>          trace("Starting workbench server, log is " + log);
>>          log.log(LogService.LOG_INFO, "Starting workbench server.");
>>      }
>>      
>>      @Override
>>      @Invalidate
>>      public void stop() {
>>          trace("Stopping workbench server, log is " + log);
>>          log.log(LogService.LOG_INFO, "Stopping workbench server.");
>>      }
>>      
>>      private void trace(final String msg) {
>>          FileWriter w = null;
>>          try {
>>              w = new FileWriter("C:/temp/test.log", true);
>>              w.write(msg + "\n");
>>          } catch (IOException ex) {
>>              Logger.getLogger(ServerImpl.class.getName()).log(Level.SEVERE, null,
ex);
>>          }
>>          finally {
>>              if (w!=null) {
>>                  try {
>>                      w.close();
>>                  } catch (IOException ex) {
>>                      Logger.getLogger(ServerImpl.class.getName()).log(Level.SEVERE,
null, ex);
>>                  }
>>              }
>>          }
>>      }
>> }
>>
>> If I install the module in karaf and resolve it, everything's fine. But when I start
it, its state changes to Active but nothing happens. In the attachment you find my project
file.
>>
>> Can someone tell me whats wrong with my code?
> Is the log service available ? Try to set it ‘optional’ (optional=true).
>
> Regards,
>
> Clement
>
>> Any hint is welcome
>> Hermann
>> <pom.xml>
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