Problem with ProxyFactoryBean

[sat]

I am getting Null pointer exception

at $Proxy0.getAll(Unknown Source)

while trying to access Bean through ProxyFactoryBean. However if I directly use Impl class then I am getting all the values etc.

Here are XML entries


<bean id="deviceManager" class="org.springframework.aop.framework.ProxyFact oryBean">
<property name="proxyInterfaces" value="com.xyz.jdbc.DeviceManager"/>
<property name="interceptorNames">
<list>
<idref local="transactionInterceptor"/>
<idref bean="deviceManagerSecurity"/>
<idref local="deviceManagerTarget"/>
</list>
</property>
</bean>
<bean id="deviceManagerTarget" class="com.xyz.jdbc.DeviceManagerImpl">
<property name="deviceDao">
<bean class="com.xyz.jdbc.DeviceDaoSpring">
<property name="dataSource" ref="dataSource"/>
</bean>
</property>
<property name="mutableAclService" ref="aclService"/>
</bean>

<bean id="contactDataStore" class="com.xyz.domain.ContactDataStore">
<property name="deviceManager" ref="deviceManager"/>
</bean>


Exception details

[ERROR,ApplicationLifecycleAdvisor,AWT-EventQueue-0]
java.lang.NullPointerException
at com.cisco.csm.rbac.ui.ContactView.onApplicationEve nt(ContactView.java:219)
at org.springframework.context.event.SimpleApplicatio nEventMulticaster$1.run(SimpleApplicationEventMult icaster.java:77)
at org.springframework.core.task.SyncTaskExecutor.exe cute(SyncTaskExecutor.java:49)
at org.springframework.context.event.SimpleApplicatio nEventMulticaster.multicastEvent(SimpleApplication EventMulticaster.java:75)
at org.springframework.context.support.AbstractApplic ationContext.publishEvent(AbstractApplicationConte xt.java:246)
at org.springframework.security.intercept.AbstractSec urityInterceptor.publishEvent(AbstractSecurityInte rceptor.java:492)
at org.springframework.security.intercept.AbstractSec urityInterceptor.beforeInvocation(AbstractSecurity Interceptor.java:338)
at org.springframework.security.intercept.method.aopa lliance.MethodSecurityInterceptor.invoke(MethodSec urityInterceptor.java:63)
at org.springframework.aop.framework.ReflectiveMethod Invocation.proceed(ReflectiveMethodInvocation.java :166)
at org.springframework.transaction.interceptor.Transa ctionInterceptor.invoke(TransactionInterceptor.jav a:107)
at org.springframework.aop.framework.ReflectiveMethod Invocation.proceed(ReflectiveMethodInvocation.java :166)
at org.springframework.aop.framework.JdkDynamicAopPro xy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy0.getAll(Unknown Source)


I am developing acegi sample app using SpringRichClient and I am using acegi core tiger 1.0.5.

I would appreciate any help.

[Marten Deinum]

When posting code, please use [ code][/code ] tags. Next to that your configuration is wrong. You want to add a target, the bean you want to target is not an interceptor!

<property name="interceptorNames">
<list>
<idref local="transactionInterceptor"/>
<idref bean="deviceManagerSecurity"/>
<idref local="deviceManagerTarget"/>
</list>
</property>

The line in red is your TARGET it isn't an interceptor which should be applied to your TARGET! Also it are interceptorNames not the actuall instances! As another improvement I would suggest registering the target as an anonymous inner bean, this prevents you from getting the wrong (non-proxied) one.

Which would result in something like this.

<bean id="deviceManager" class="org.springframework.aop.framework.ProxyFactoryBean">
  <property name="proxyInterfaces" value="com.xyz.jdbc.DeviceManager"/>
  <propert name="target">
    <bean class="com.xyz.jdbc.DeviceManagerImpl">
      <property name="deviceDao">
        <bean class="com.xyz.jdbc.DeviceDaoSpring">
          <property name="dataSource" ref="dataSource"/>
        </bean>
      </property>
      <property name="mutableAclService" ref="aclService"/>
    </bean>
  </property>
  <property name="interceptorNames">
    <list>
    <value>transactionInterceptor</value>
    <value>deviceManagerSecurity</value>
  </list>
  </property>
</bean>

<bean id="contactDataStore" class="com.xyz.domain.ContactDataStore">
  <property name="deviceManager" ref="deviceManager"/>
</bean>

[sat]

I am still getting the same exception even with changed configuration

   <bean id="deviceManager" class="org.springframework.aop.framework.ProxyFactoryBean">
     <property name="proxyInterfaces" value="com.xyz.jdbc.DeviceManager"/>
     	<property name="target">
     	   <bean class="com.xyz.jdbc.DeviceManagerImpl">
     	      	<property name="deviceDao">
       				<bean class="com.xyz.jdbc.DeviceDaoSpring">
	       				<property name="dataSource" ref="dataSource"/>
       				</bean>
       			</property>
       			<property name="mutableAclService" ref="aclService"/>
       		</bean>
       	</property>
   	   <property name="interceptorNames">
       <list>
         <idref local="transactionInterceptor"/>
         <idref bean="deviceManagerSecurity"/>
       </list>
     </property>
   </bean>

    <bean id="contactDataStore" class="com.xyz.domain.ContactDataStore">
    	<property name="deviceManager" ref="deviceManager"/>
    </bean>

Exception
at org.springframework.context.event.SimpleApplicatio nEventMulticaster$1.run(SimpleApplicationEventMult icaster.java:77)
at org.springframework.core.task.SyncTaskExecutor.exe cute(SyncTaskExecutor.java:49)
at org.springframework.context.event.SimpleApplicatio nEventMulticaster.multicastEvent(SimpleApplication EventMulticaster.java:75)
at org.springframework.context.support.AbstractApplic ationContext.publishEvent(AbstractApplicationConte xt.java:246)
at org.springframework.security.intercept.AbstractSec urityInterceptor.publishEvent(AbstractSecurityInte rceptor.java:492)
at org.springframework.security.intercept.AbstractSec urityInterceptor.beforeInvocation(AbstractSecurity Interceptor.java:328)
at org.springframework.security.intercept.method.aopa lliance.MethodSecurityInterceptor.invoke(MethodSec urityInterceptor.java:63)
at org.springframework.aop.framework.ReflectiveMethod Invocation.proceed(ReflectiveMethodInvocation.java :166)
at org.springframework.transaction.interceptor.Transa ctionInterceptor.invoke(TransactionInterceptor.jav a:107)
at org.springframework.aop.framework.ReflectiveMethod Invocation.proceed(ReflectiveMethodInvocation.java :166)
at org.springframework.aop.framework.JdkDynamicAopPro xy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy0.getAll(Unknown Source)


This is very much the same from acegi contact sample but somehow I am not able to figure what is missing from my code/xml file

Here is the configuration from sample contact application

   <bean id="contactManager" class="org.springframework.aop.framework.ProxyFactoryBean">
     <property name="proxyInterfaces" value="sample.contact.ContactManager"/>
     <property name="interceptorNames">
       <list>
         <idref local="transactionInterceptor"/>
         <idref bean="contactManagerSecurity"/>
         <idref local="contactManagerTarget"/>
       </list>
     </property>
   </bean>

   <bean id="contactManagerTarget" class="sample.contact.ContactManagerBackend">
	   <property name="contactDao">
       <bean class="sample.contact.ContactDaoSpring">
	       <property name="dataSource"><ref local="dataSource"/></property>
       </bean>
     </property>
     <property name="mutableAclService" ref="aclService"/>
   </bean>

[Marten Deinum]

As I stated before the interceptorNames are the NAMES of the interceptors NOT the interceptors themselves!!!!!