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MQSeries.net Forum Index » IBM MQ Java / JMS » Spring MQ integration problem

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spatonai
PostPosted: Tue Jun 07, 2011 1:11 am    Post subject: Spring MQ integration problem Reply with quote

Newbie

Joined: 07 Jun 2011
Posts: 1
Dear All,

I'm new to Spring, and facing to a probably basic problem.
I'm trying to configure

MQQueue Conection Factory as a spring bean in see below:


<bean id="jmsConnectionFactory" class="com.ibm.mq.jms.MQQueueConnectionFactory">

<property name="transportType">
<util:constant static-field="com.ibm.mq.jms.JMSC.MQJMS_TP_CLIENT_MQ_TCPIP" />
</property>

<property name="queueManager">
<value>MQJMS.QManager</value>
</property>
<property name="hostName">
<value>localhost</value>
</property>
<property name="port">
<value>1414</value>
</property>
<property name="channel">
<value>1</value>
</property>
</bean>

and I got the following exception:

INFO: Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@779b04e2: defining beans [jmsConnectionFactory,destination,jmsTemplate,jmsReceiver]; root of factory hierarchy
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jmsConnectionFactory' defined in class path resource [mq.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.ibm.mq.jms.MQQueueConnectionFactory]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:965)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
at wsmq.ReceiveMQSpringJMS.main(ReceiveMQSpringJMS.java:1
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.ibm.mq.jms.MQQueueConnectionFactory]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:141)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:74)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:958)
... 13 more
Caused by: java.lang.NullPointerException
at com.ibm.msg.client.jms.internal.JmsFactoryFactoryImpl.getInstance(JmsFactoryFactoryImpl.java:169)
at com.ibm.msg.client.jms.admin.JmsConnectionFactoryImpl.setProviderFactory(JmsConnectionFactoryImpl.java:176)
at com.ibm.mq.jms.MQConnectionFactory.<init>(MQConnectionFactory.java:286)
at com.ibm.mq.jms.MQQueueConnectionFactory.<init>(MQQueueConnectionFactory.java:76)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:126)
... 15 more

What do I do wrong?
I found out that in the class JmsConnectionFactory the line which cause the NullPointer exception is :

providerFactory = ((JmsFactoryFactoryImpl)JmsFactoryFactoryImpl.getInstance(connectionTypeName)).getProviderFactoryFactory();

so probably the connectionTypeName is missing, or not good...

this property comes from

connectionTypeName = getStringProperty("XMSC_CONNECTION_TYPE_NAME");

but I do not know why this property is not set, and how to set it...

Thanks a lot in advance!

Szabi
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exerk
PostPosted: Tue Jun 07, 2011 7:58 am    Post subject: Reply with quote

Jedi Council

Joined: 02 Nov 2006
Posts: 6339
I'm going out on a limb here because I know nothing of Spring, but I would expect to see something like the following:

Code:
<property name="queueManager">
<value>MY_QMGR_NAME</value>
</property>
<property name="hostName">
<value>localhost</value>
</property>
<property name="port">
<value>1414</value>
</property>
<property name="channel">
<value>MY.CLIENT.CHANNEL.NAME</value>
</property>
</bean>

Where MY_QMGR_NAME is the actual name of your queue manager and MY.CLIENT.CHANNEL.NAME is the name of the SVRCONN you have defined for the application to connect.

And yes, before someone points out that the example channel name I have used exceeds the string maximum of twenty characters, it is just an example.
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It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys.
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mqjeff
PostPosted: Tue Jun 07, 2011 8:02 am    Post subject: Reply with quote

Grand Master

Joined: 25 Jun 2008
Posts: 17447
exerk wrote:
Where MY_QMGR_NAME is the actual name of your queue manager and MY.CLIENT.CHANNEL.NAME is the name of the SVRCONN you have defined for the application to connect.

And yes, before someone points out that the example channel name I have used exceeds the string maximum of twenty characters, it is just an example.


Nice catch. I'd noticed that there was a channel parameter, but not that it was set to the value of "1".

And I really hope the name of the actual SVRCONN in use is not "1".
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fjb_saper
PostPosted: Tue Jun 07, 2011 8:47 pm    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
As this post shows quite some lack of understanding of some MQ fundamentals, I believe we should attach to it a must read:

client manual in the infocenter

MQ client server tutorial

And as you're studying remember to look at the Using Java manual -- WebSphere MQ classes for JMS too.

As this is spring framework related moving to java forum.

Have fun
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MQ & Broker admin
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