EJB 3.0 with Spring 2.0

[prajkta]

Can i use ejb 3.0 with spring 1.2 version?

Thanks.

[wpoitras]

Do you mean on the client or server?

Client side is simple. The EJB3 object is just a JNDI object which implements a particular interface. So you can use JndiObjectFactory to look it up.

On the server side, you can mix EJB3 and Spring. Since EJB3 objects are created by the container and not Spring, I'm not sure if you could use any of the AspectJ Spring functionality (like @Configurable/@Autowire) on an EJB3 object. You'd have to try it (if that is something you need).

[prajkta]

Thanks Bill. i think you have very good knowledge of ejbs. do u know any good ,detailed tutorial related to spring EJB?

thanks.

[MmarcoM]

Bill,
sorry i needed to be more precise
I have an EJB3 in which i want to inject a spring bean..
i have followed this link

http://twasink.net/blog/archives/200...spring_wi.html

and down the article it mentioned

SpringBeanAutowiringInterceptor

here's my code

@Stateless (name="Facade")
@Interceptors(SpringBeanAutowiringInterceptor.class)
public class StatelessFacade implements Facade {


	@Autowired
	private MySpringBean mySpringBean;

	public String getFoobar() {
		return "Foobar";
	}
}

here'sm by beanRefContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>


	<bean id="factoryKey"
		class="org.springframework.context.support.ClassPathXmlAp plicationContext">
		<constructor-arg value="myBeansContext.xml"/>
	</bean>
</beans>

and here' smy myBeansContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<!--
  - Application context for EJB3
  -->

<beans>

	<bean id="simpleBean"
		class="com.mm.j2me.spring.MySpringBean"/>
	
	</bean>
</beans>

and here' sexception

java.lang.RuntimeException: org.springframework.beans.factory.access.BootstrapEx
ception: Unable to initialize group definition. Group resource name [classpath*:
beanRefContext.xml], factory key [null]; nested exception is org.springframework
.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframew
ork.context.support.ClassPathXmlAp plicationContext] for bean with name 'factory
Key' defined in URL [file:/C:/Sw/J2MEJobApp/ejbJ2ME/target/classes/beanRefContex
t.xml]; nested exception is java.lang.ClassNotFoundException: org.springframewor
k.context.support.ClassPathXmlAp plicationContext
        at org.jboss.ejb3.interceptor.LifecycleInterceptorHandler.postConstruct(
LifecycleInterceptorHandler.java:113)
        at org.jboss.ejb3.EJBContainer.invokePostConstruct(EJBContainer.java:505
)
        at org.jboss.ejb3.AbstractPool.create(AbstractPool.java:112)
        at org.jboss.ejb3.ThreadlocalPool.get(ThreadlocalPool.java:48)
        at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(Stateles
sInstanceInterceptor.java:54)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:101)
        at org.jboss.aspects.security.AuthenticationInterceptor.invoke(Authentic
ationInterceptor.java:77)
        at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3Auth
enticationInterceptor.java:102)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:101)
        at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterce
ptor.java:47)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:101)
        at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(Asynchrono
usInterceptor.java:106)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:101)
        at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessCont
ainer.java:211)
        at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalPro
xy.java:79)
        at $Proxy28.getFoobar(Unknown Source)
        at example1.StatelessFacadeTest.testFoobar(StatelessFacadeTest.java:38)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.testng.internal.MethodHelper.invokeMethod(MethodHelper.java:552)
        at org.testng.internal.Invoker.invokeMethod(Invoker.java:411)
        at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:785)
        at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:114)
        at org.testng.TestRunner.privateRun(TestRunner.java:693)
        at org.testng.TestRunner.run(TestRunner.java:574)
        at org.testng.SuiteRunner.privateRun(SuiteRunner.java:241)
        at org.testng.SuiteRunner.run(SuiteRunner.java:145)
        at org.testng.TestNG.createAndRunSuiteRunners(TestNG.java:901)
        at org.testng.TestNG.runSuitesLocally(TestNG.java:863)
        at org.testng.TestNG.run(TestNG.java:613)
        at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.ja
va:74)
        at org.apache.maven.surefire.testng.TestNGXmlTestSuite.execute(TestNGXml
TestSuite.java:92)
        at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(Su
refireBooter.java:339)
        at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.j
ava:997)
Caused by: org.springframework.beans.factory.access.BootstrapException: Unable t
o initialize group definition. Group resource name [classpath*:beanRefContext.xm
l], factory key [null]; nested exception is org.springframework.beans.factory.Ca
nnotLoadBeanClassException: Cannot find class [org.springframework.context.suppo
rt.ClassPathXmlAp plicationContext] for bean with name 'factoryKey' defined in U
RL [file:/C:/Sw/J2MEJobApp/ejbJ2ME/target/classes/beanRefContext.xml]; nested ex
ception is java.lang.ClassNotFoundException: org.springframework.context.support
.ClassPathXmlAp plicationContext
        at org.springframework.beans.factory.access.SingletonBeanFactoryLocator.
useBeanFactory(SingletonBeanFactoryLocator.java:389)
        at org.springframework.ejb.interceptor.SpringBeanAutowiringInterceptor.g
etBeanFactoryReference(SpringBeanAutowiringInterceptor.java:132)
        at org.springframework.ejb.interceptor.SpringBeanAutowiringInterceptor.g
etBeanFactory(SpringBeanAutowiringInterceptor.java:113)
        at org.springframework.ejb.interceptor.SpringBeanAutowiringInterceptor.a
utowireBean(SpringBeanAutowiringInterceptor.java:93)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jboss.ejb3.interceptor.LifecycleInvocationContextImpl.proceed(Lif
ecycleInvocationContextImpl.java:131)
        at org.jboss.ejb3.interceptor.LifecycleInterceptorHandler.postConstruct(
LifecycleInterceptorHandler.java:109)
        ... 40 more
Caused by: org.springframework.beans.factory.CannotLoadBeanClassException: Canno
t find class [org.springframework.context.support.ClassPathXmlAp plicationContex
t] for bean with name 'factoryKey' defined in URL [file:/C:/Sw/J2MEJobApp/ejbJ2M
E/target/classes/beanRefContext.xml]; nested exception is java.lang.ClassNotFoun
dException: org.springframework.context.support.ClassPathXmlAp plicationContext
        at org.springframework.beans.factory.support.AbstractBeanFactory.resolve
BeanClass(AbstractBeanFactory.java:1173)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.predictBeanType(AbstractAutowireCapableBeanFactory.java:479)
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFacto
ryBean(AbstractBeanFactory.java:787)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.
preInstantiateSingletons(DefaultListableBeanFactory.java:393)
        at org.springframework.context.support.AbstractApplicationContext.finish
BeanFactoryInitialization(AbstractApplicationContext.java:736)
        at org.springframework.context.support.AbstractApplicationContext.refres
h(AbstractApplicationContext.java:369)
        at org.springframework.context.access.ContextSingletonBeanFactoryLocator
.initializeDefinition(ContextSingletonBeanFactoryLocator.java:141)
        at org.springframework.beans.factory.access.SingletonBeanFactoryLocator.
useBeanFactory(SingletonBeanFactoryLocator.java:384)
        ... 49 more
Caused by: java.lang.ClassNotFoundException: org.springframework.context.support
.ClassPathXmlAp plicationContext
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at org.springframework.util.ClassUtils.forName(ClassUtils.java:230)
        at org.springframework.beans.factory.support.AbstractBeanDefinition.reso
lveBeanClass(AbstractBeanDefinition.java:381)
        at org.springframework.beans.factory.support.AbstractBeanFactory.resolve
BeanClass(AbstractBeanFactory.java:1170)
        ... 56 more

i m running my tests using jboss embedded container and testNG, and when i ran tehm using mvn -X to see what's in classpath i can clearly see spring-2.5.1.jar

C:\Documents and Settings\Marco Mistroni\.m2\repository\org\springframework\spring\2.5.1\spring-2.5.1.jar, C:\Sw\J2MEJobApp\ejbJ2ME\lib\jbossws-client-1.3.jar]

could you please help me out?

thanks and regards
marco




thanks and regards
marco

[MmarcoM]

Hello,
think i might have found problem - as per resulto fo a google search -
i am using Spring 2.5, and as well ejb embeddable container which has cglib classes in his thirdparty-all.jar jar file
problem is taht i don't know which version of ehcache is using...

might that be the reason?

regards
marco

[MmarcoM]

Hello,
ok after some debugging i found the problem: I M AN IDIOT

this was the problem, an incorrect declaration of ClassPathXmlApplicationContext

<bean id="factoryKey"
		class="org.springframework.context.support.ClassPathXmlAp plicationContext">
		<constructor-arg value="myBeansContext.xml"/>
	</bean>

i left a space between ClassPathXmlAp and plicationContext

everything works as a charm... ejb3 + embedded container + spring2.5 + testng + mvn2......

sorry for messing up... i definitely should not code on saturday evening.....

rgds
marco

[Ananda_M]

Hi,

I have beanRefContext.xml which has a reference to applicationContext.xml where in the bean declarations are given.
I am using the @Autowired annotation for injecting the bean instance to the instance variable declared in EJB.

beanRefContext.xml
<beans>
<bean id="businessBeanFactory"
class="org.springframework.context.support.ClassPa thXmlApplicationContext">
<constructor-arg value="/applicationContext.xml" />
</bean>
</beans>

applicationContext.xml

[COLOR="rgb(105, 105, 105)"]<bean id="searchEngine"
class="com.engine.SearchEngine"
autowire="byName"/>
</beans>[/COLOR]


MyBean.java

[COLOR="rgb(105, 105, 105)"]@Session(ejbName = "MyBean")
@JndiName(remote = "ejb. MyBeanRemoteHome")
@FileGeneration(remoteClass = Constants.Bool.TRUE, remoteHome = Constants.Bool.TRUE, localClass = Constants.Bool.FALSE, localHome = Constants.Bool.FALSE)
@Interceptors(SpringBeanAutowiringInterceptor.clas s)
public class MyBean extends GenericSessionBean implements SessionBean {
private static final long serialVersionUID = 1L;

@Autowired
private ISearchEngine searchEngine;

public void testEngine(){
searchEngine.searchMethod();
}
}[/COLOR]

I am getting the NullPointerException on executing the above program. Thing is, the object is not populated into the instance variable searchEngine. What i doubt is that beanRefContext.xml is not being considered by the Weblogic.

FYI, i am using Weblogic 10.2 and IDE is Weblogic studio.

Please, help me in this.