<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<body link="#355491" alink="#4262a1" vlink="#355491" style="background: #e2e2e2; margin: 0; padding: 20px;">
<div>
<table cellpadding="0" bgcolor="#FFFFFF" border="0" cellspacing="0" style="border: 1px solid #dadada; margin-bottom: 30px; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td>
<table border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" style="border: solid 2px #ccc; background: #dadada; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td bgcolor="#000000" valign="middle" height="58px" style="border-bottom: 1px solid #ccc; padding: 20px; -moz-border-radius-topleft: 3px; -moz-border-radius-topright: 3px; -webkit-border-top-right-radius: 5px; -webkit-border-top-left-radius: 5px;">
<h1 style="color: #333333; font: bold 22px Arial, Helvetica, sans-serif; margin: 0; display: block !important;">
<!-- To have a header image/logo replace the name below with your img tag -->
<!-- Email clients will render the images when the message is read so any image -->
<!-- must be made available on a public server, so that all recipients can load the image. -->
<a href="http://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
</td>
</tr>
<tr>
<td bgcolor="#FFFFFF" style="font: normal 12px Arial, Helvetica, sans-serif; color:#333333; padding: 20px; -moz-border-radius-bottomleft: 4px; -moz-border-radius-bottomright: 4px; -webkit-border-bottom-right-radius: 5px; -webkit-border-bottom-left-radius: 5px;"><h3 style="margin: 10px 0 5px; font-size: 17px; font-weight: normal;">
Re: META-INF/services for module extensions - question/issue
</h3>
<span style="margin-bottom: 10px;">
created by <a href="http://community.jboss.org/people/lmcdasi">Dan Sirbu</a> in <i>JBoss AS7 Development</i> - <a href="http://community.jboss.org/message/626976#626976">View the full discussion</a>
</span>
<hr style="margin: 20px 0; border: none; background-color: #dadada; height: 1px;">
<div class="jive-rendered-content"><p>Brian,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>   Unfortunately it looks like I have to come back:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>(a) When I do remote debugging on the TCCL Service load I start to have the following exception. I recall being able to debug that until I am getting this behaviour. If I disable the remote debugging the startup is ok. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>16:22:50,138 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-10) MSC00001: Failed to start service jboss.as.test.singleton: org.jboss.msc.service.StartException in service jboss.as.test.singleton: Failed to start service</p><p>        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1780) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]</p><p>        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_26]</p><p>        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_26]</p><p>        at java.lang.Thread.run(Thread.java:662) [:1.6.0_26]</p><p>Caused by: java.util.NoSuchElementException</p><p>        at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:340) [:1.6.0_26]</p><p>        at java.util.ServiceLoader$1.next(ServiceLoader.java:421) [:1.6.0_26]</p><p>        at com.moduleext.jboss.extension.services.TCCLSingletonService.start(TCCLSingletonService.java:91)</p><p>        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1824) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]</p><p>        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1759) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]</p><p>        ... 3 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>(b) Beside M1, I do have M2. Both implement the same interface for the ServiceLoader. The first kickstarts ok but the second fails with CastException tough I am sure I did not mess around with the class type definition.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>16:28:42,273 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-15) MSC00001: Failed to start service jboss.as.modext.singleton: org.jboss.msc.service.StartException in service jboss.as.modext.singleton: Failed to start service</p><p>        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1780) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]</p><p>        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_26]</p><p>        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_26]</p><p>        at java.lang.Thread.run(Thread.java:662) [:1.6.0_26]</p><p>Caused by: java.util.ServiceConfigurationError: com.test.jboss.module.ifc.TestModuleIfc: Provider com.test.jboss.test.impl.TestModuleTwoImpl could not be instantiated: java.lang.ClassCastException</p><p>        at java.util.ServiceLoader.fail(ServiceLoader.java:207) [:1.6.0_26]</p><p>        at java.util.ServiceLoader.access$100(ServiceLoader.java:164) [:1.6.0_26]</p><p>        at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:353) [:1.6.0_26]</p><p>        at java.util.ServiceLoader$1.next(ServiceLoader.java:421) [:1.6.0_26]</p><p>        at com.ericsson.modext.jboss.extension.services.TCCLSingletonService.start(TCCLSingletonService.java:91)</p><p>        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1824) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]</p><p>        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1759) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]</p><p>        ... 3 more</p><p>Caused by: java.lang.ClassCastException</p><p>        at java.lang.Class.cast(Class.java:2990) [:1.6.0_26]</p><p>        at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:345) [:1.6.0_26]</p><p>        ... 7 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The code snipet:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>List<MyModule> myList = this.getModules();</p><p>Iterator<MyModule> myIter = myList.iterator();</p><p>while(myIter.hasNext()) {</p><p>       MyModule mmodule = myIter.next();</p><p>       ModuleIdentifier moduleIdentifier = mmodule.getIdentifier();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>       log.info("TCCLSingletonService -- > starting module: " + moduleIdentifier.getName());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>       try {</p><p>                  Module module = Module.getCallerModuleLoader().loadModule(moduleIdentifier);</p><p>                  ServiceLoader<?> serviceLoader = module.loadService(TestModuleIfc.class);</p><p>                  Iterator<?> serviceIter = serviceLoader.iterator();</p><p>                  while(serviceIter.hasNext()) {</p><p>                           ((TestModuleIfc) serviceIter.next()).start(context);</p><p>                  }</p><p>      } catch () {</p><p>                  ...................</p><p>      }</p><p>}</p></div>
<div style="background-color: #f4f4f4; padding: 10px; margin-top: 20px;">
<p style="margin: 0;">Reply to this message by <a href="http://community.jboss.org/message/626976#626976">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in JBoss AS7 Development at <a href="http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2225">Community</a></p>
</div></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>