Register two Beans instances via annotations

[ray.frid]

Hi,
I am using Spring3.1

I am getting the exception InstanceAlreadyExistsException when I try to add bean to the JMX context.

I am using annotations in order to add this bean. how could I over pass this excpetion and register both my instances to the jmx?


my code:

@ManagedResource(objectName = "ba.f:name=kkk", description = "")
public class SessionsManagerBean
{
..
}

xml:

jmx configuration:

<bean id="mbeanServer" class="org.springframework.jmx.support.MBeanServerFactoryBean" />

	<bean id="jmxAttributeSource"
		class="org.springframework.jmx.export.annotation.AnnotationJmxAttributeSource" />

	<!-- will create management interface using annotation metadata -->
	<bean id="assembler"
		class="org.springframework.jmx.export.assembler.MetadataMBeanInfoAssembler">
		<property name="attributeSource" ref="jmxAttributeSource" />
	</bean>

	<!-- will pick up the ObjectName from the annotation -->
	<bean id="namingStrategy"
		class="org.springframework.jmx.export.naming.MetadataNamingStrategy">
		<property name="attributeSource" ref="jmxAttributeSource" />
	</bean>


	<bean id="exporter" class="org.springframework.jmx.export.MBeanExporter"
		lazy-init="false">

		<property name="assembler" ref="assembler" />
		<property name="namingStrategy" ref="namingStrategy" />
		<property name="autodetectModeName" value="AUTODETECT_ASSEMBLER" />
		<property name="ensureUniqueRuntimeObjectNames" value="false" />

		<property name="beans">
			<map>
				<entry key="Server:name=HttpAdaptor">
					<bean class="mx4j.tools.adaptor.http.HttpAdaptor">
						<property name="port" value="8000" />
						<property name="host" value="0.0.0.0" />
						<property name="processor">
							<bean class="mx4j.tools.adaptor.http.XSLTProcessor" />
						</property>

					</bean>
				</entry>
			</map>
		</property>
		<property name="listeners">
			<list>
				<!--
					let the HttpAdapter be started after it is registered in the
					MBeanServer
				-->
				<bean class="com.fixgw.jmx.HttpAdaptorMgr">
					<property name="mbeanServer" ref="mbeanServer" />
				</bean>
			</list>
		</property>
	</bean>

bean instances xml configuration:

<bean id="SessionsManager1" class="com.fixgw.sessions.SessionsManagerBean">
	</bean>


	<bean id="SessionsManager2" class="com.fixgw.sessions.SessionsManagerBean">
	</bean>

error:

Caused by: javax.management.InstanceAlreadyExistsException: ba.f:name=kkk
	at com.sun.jmx.mbeanserver.Repository.addMBean(Unknown Source)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(Unknown Source)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(Unknown Source)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(Unknown Source)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(Unknown Source)
	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(Unknown Source)
	at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:169)
	at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:655)
	at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:592)
	... 18 more

thanks,
ray.

[Marten Deinum]

You cannot... The name has to be unique (AFAIK) so each needs to have a different name. You could try adding them explicitly (and not by annotations).

Also it is easier to use the spring namespace support to configure the jmx exporter etc. saves you quite some xml.

[ray.frid]

Weird. so there isnt a way of using jmx annotations when I have more then one instance of them same bean.

I tried to mix both configurations but it didnt work.

thanks.

[Marten Deinum]

The name has to be unique (in a database you cannot have the sime primary key for multiple records!) and if you hardcode it in the annotation that isn't the case. You could try and create your own namingconvention (forgot the interface which does the naming) but basically you cannot do that.

[Konrad78]

you would like to find out what the properties of the spring framework. Manage resource annotation do as seen in this Java Doc. you want to understand each pa ram so I can set it to the proper value. If anyone knows where to find more info, I would appreciate it.
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