Hello.
I just received a question, if it is possible to access one central
servlet (extending RemoteServiceServlet) that can be accessed by
several gwt client applications. The interface that is implemented by
the servlet is fixed. The same interface is used by every client
application.
I could not find any specific information about it in the docs and on
this list, so I tried it out. When accessing the service, I get a null
pointer exception - stacktrace below. My guess is, this has something
to do with the rpc policy file.
What seem to work is, when we install the client apps into the same
war file as the servlet. The problem exists, when we try to install
the client applications as separate war files.
Any comments if this should work at all, and how to get it running is welcome.
We are using for this GWT 1.7.1 and Glassfish 2.1
Thanks,
Michael
Here is the stacktrace:
WebModule[/AppsAWC]Exception while dispatching incoming RPC call
java.lang.NullPointerException
at
com.sun.enterprise.web.logger.LoggerBase.write(LoggerBase.java:215)
at
com.sun.enterprise.web.logger.LoggerBase.log(LoggerBase.java:172)
at
org.apache.catalina.core.ApplicationContext.log(ApplicationContext.java:839)
at
org.apache.catalina.core.ApplicationContextFacade.log(ApplicationContextFacade.java:323)
at javax.servlet.GenericServlet.log(GenericServlet.java:335)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.doGetSerializationPolicy(RemoteServiceServlet.java:219)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.getSerializationPolicy(RemoteServiceServlet.java:117)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.prepareToRead(ServerSerializationStreamReader.java:429)
at
com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:234)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
at jorapi.awc.server.AWC.service(AWC.java:314)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at
org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:315)
at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at
com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
at
com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1093)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1093)
at
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:291)
at
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:666)
at
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:597)
at
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:872)
at
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
at
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
at
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
at com.sun.enterprise.web.portunif.PortUnificationPipeline
$PUTask.doTask(PortUnificationPipeline.java:382)
at
com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:264)
at
com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
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