spring blazeds integration: IllegalArgumentException: ServletContext must not be null

I am trying to get dpHibernate 2.0 RC6 running on an Apache Tomcat 7.0.12 with BlazeDS 4.0.0.14931, Spring 3.0.5 and Spring-BlazeDS-Integration 1.5.0.M2

I got pretty far with my configuration, the services are parsed fine, annotation based Entities and Datamodel are good, I can list the services in FlashBuilder DCD, but as soon as I am calling a service method (just a simple void method) the server returns following Exception. Not really sure where in my configuration I could have missed something, as I understood from the docs the rest is auto wired.

{operation})****************getAll
{invoke} 6823
java.lang.IllegalArgumentException: ServletContext must not be null
a开发者_高级运维t org.springframework.util.Assert.notNull(Assert.java:112)
at org.springframework.web.context.support.WebApplicationContextUtils.getWebApplicationContext(WebApplicationContextUtils.java:109)
at org.springframework.web.context.support.WebApplicationContextUtils.getWebApplicationContext(WebApplicationContextUtils.java:99)
at org.springframework.web.context.support.WebApplicationContextUtils.getRequiredWebApplicationContext(WebApplicationContextUtils.java:82)
at org.dphibernate.serialization.SpringContextSerializerFactory.getContextReference(SpringContextSerializerFactory.java:111)
at org.dphibernate.serialization.SpringContextSerializerFactory.getSerializerContextReference(SpringContextSerializerFactory.java:65)
at org.dphibernate.serialization.SpringContextSerializerFactory.getSerializer(SpringContextSerializerFactory.java:56)
at org.dphibernate.serialization.SpringContextSerializerFactory.getSerializer(SpringContextSerializerFactory.java:51)
at org.dphibernate.adapters.RemotingAdapter.invoke(RemotingAdapter.java:132)
at flex.messaging.services.RemotingService.serviceMessage(RemotingService.java:183)
at flex.messaging.MessageBroker.routeMessageToService(MessageBroker.java:1400)
at flex.messaging.endpoints.AbstractEndpoint.serviceMessage(AbstractEndpoint.java:1005)
at flex.messaging.endpoints.AbstractEndpoint$$FastClassByCGLIB$$1a3ef066.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:688)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.flex.core.MessageInterceptionAdvice.invoke(MessageInterceptionAdvice.java:66)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.adapter.ThrowsAdviceInterceptor.invoke(ThrowsAdviceInterceptor.java:124)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.Cglib2AopProxy$FixedChainStaticTargetInterceptor.intercept(Cglib2AopProxy.java:572)
at flex.messaging.endpoints.AMFEndpoint$$EnhancerByCGLIB$$5dafba90.serviceMessage(<generated>)
at flex.messaging.endpoints.amf.MessageBrokerFilter.invoke(MessageBrokerFilter.java:103)
at flex.messaging.endpoints.amf.LegacyFilter.invoke(LegacyFilter.java:158)
at flex.messaging.endpoints.amf.SessionFilter.invoke(SessionFilter.java:44)
at flex.messaging.endpoints.amf.BatchProcessFilter.invoke(BatchProcessFilter.java:67)
at flex.messaging.endpoints.amf.SerializationFilter.invoke(SerializationFilter.java:166)
at flex.messaging.endpoints.BaseHTTPEndpoint.service(BaseHTTPEndpoint.java:291)
at flex.messaging.endpoints.AMFEndpoint$$EnhancerByCGLIB$$5dafba90.service(<generated>)
at org.springframework.flex.servlet.MessageBrokerHandlerAdapter.handle(MessageBrokerHandlerAdapter.java:108)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
[BlazeDS]Exception when invoking service 'remoting-service': flex.messaging.MessageException: ServletContext must not be null
incomingMessage: Flex Message (flex.messaging.messages.RemotingMessage) 
operation = getAll
clientId = E8B0A041-2F0D-95A8-1F38-D5D244CDA6E4
destination = personService
messageId = 499B6C51-8E26-DD96-9055-79EF0D3823B0
timestamp = 1303420800415
timeToLive = 0
body = 
[

]
hdr(DSId) = E8B03010-7B0F-DED7-6D71-C4623D635D2A
hdr(DSEndpoint) = amf
Exception: flex.messaging.MessageException: ServletContext must not be null
at flex.messaging.services.RemotingService.serviceMessage(RemotingService.java:225)
at flex.messaging.MessageBroker.routeMessageToService(MessageBroker.java:1400)
at flex.messaging.endpoints.AbstractEndpoint.serviceMessage(AbstractEndpoint.java:1005)
at flex.messaging.endpoints.AbstractEndpoint$$FastClassByCGLIB$$1a3ef066.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:688)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.flex.core.MessageInterceptionAdvice.invoke(MessageInterceptionAdvice.java:66)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.adapter.ThrowsAdviceInterceptor.invoke(ThrowsAdviceInterceptor.java:124)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.Cglib2AopProxy$FixedChainStaticTargetInterceptor.intercept(Cglib2AopProxy.java:572)
at flex.messaging.endpoints.AMFEndpoint$$EnhancerByCGLIB$$5dafba90.serviceMessage(<generated>)
at flex.messaging.endpoints.amf.MessageBrokerFilter.invoke(MessageBrokerFilter.java:103)
at flex.messaging.endpoints.amf.LegacyFilter.invoke(LegacyFilter.java:158)
at flex.messaging.endpoints.amf.SessionFilter.invoke(SessionFilter.java:44)
at flex.messaging.endpoints.amf.BatchProcessFilter.invoke(BatchProcessFilter.java:67)
at flex.messaging.endpoints.amf.SerializationFilter.invoke(SerializationFilter.java:166)
at flex.messaging.endpoints.BaseHTTPEndpoint.service(BaseHTTPEndpoint.java:291)
at flex.messaging.endpoints.AMFEndpoint$$EnhancerByCGLIB$$5dafba90.service(<generated>)
at org.springframework.flex.servlet.MessageBrokerHandlerAdapter.handle(MessageBrokerHandlerAdapter.java:108)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.RuntimeException: ServletContext must not be null
at org.springframework.util.Assert.notNull(Assert.java:112)
at org.springframework.web.context.support.WebApplicationContextUtils.getWebApplicationContext(WebApplicationContextUtils.java:109)
at org.springframework.web.context.support.WebApplicationContextUtils.getWebApplicationContext(WebApplicationContextUtils.java:99)
at org.springframework.web.context.support.WebApplicationContextUtils.getRequiredWebApplicationContext(WebApplicationContextUtils.java:82)
at org.dphibernate.serialization.SpringContextSerializerFactory.getContextReference(SpringContextSerializerFactory.java:111)
at org.dphibernate.serialization.SpringContextSerializerFactory.getSerializerContextReference(SpringContextSerializerFactory.java:65)
at org.dphibernate.serialization.SpringContextSerializerFactory.getSerializer(SpringContextSerializerFactory.java:56)
at org.dphibernate.serialization.SpringContextSerializerFactory.getSerializer(SpringContextSerializerFactory.java:51)
at org.dphibernate.adapters.RemotingAdapter.invoke(RemotingAdapter.java:132)
at flex.messaging.services.RemotingService.serviceMessage(RemotingService.java:183)
... 45 more

---

This isn't so much a dpHibernate issue, as it is an issue with your Spring/Web.xml config. As such, please consider this a best guess, as there are others around who know a helluva lot more than I.

It appears you're missing the <context-param /> section from your web.xml:

<context-param>
       <param-name>contextConfigLocation</param-name>
        <param-value>
               /WEB-INF/applicationContext.xml
        </param-value>
</context-param>

That snippet is taken from one of the samples on the dpHibernate site

The error you're seeing is caused by a missing SpringContext which is needed by dpHibernate in order to look up your Hibernate session.

---

Sorry, need to reopen ...

I configured my application mostly like the lazyOverflow sample. But when I call my own service to populate my ArrayCollection PM I keep getting this ServletContext Error. Sample is the call to getRecentQuestions() from RecentQuestionPM via LoadRecentQuestionsCommand and the according result handler in RecentQuestionPM.

http://code.google.com/p/lazyoverflow/source/browse/trunk/flex/src/com/mangofactory/pepper/view/RecentQuestionsPM.as

Server Configuration is now exactly the same as in the sample, just with my own Entity, DAO and Service names.

Thats as far as I could track the problem:

SpringContextSerializerFactory:111
ServletContext servletContext = FlexContext.getServletContext();
--> servletContext --> null

---

Thanks for the help, finally I could narrow it down to FlexContext.getServletContext(); returning "null" in SpringContextSerializerFactory.java line 110 (dpHibernate current "2.0" branch, springExtensions 3.0).

Quick fix to this (staying compatible to the current implementation) was altering the code to look like the following:

    ServletContext servletContext = FlexContext.getServletContext();
    if(servletContext == null) // fix for Servlet Context must not be null exception during migration to Spring 3.0
        servletContext = FlexContext.getMessageBroker().getServletContext();
    context= WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);

Don't know if I am doing something ugly here, but works for me. Just thinking ... this line attempts to get the webapplication root context via the current servletContext, if this is null just get it via another one that must be there if this request gets here (which is the springMessageBrokerServlet).