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| leitao |
 Posted: Mon May 23, 2005 4:51 am Post subject: Mq converts JMSObjectMessages to JMSBytesObject. |
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Joined: 23 May 2005
Posts: 22
Location: Campinas - São Paulo - Brasil
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Hello,
I am using Websphere 5.0.2.6 and MQ 530.9 CSD09. and i am noticing some interesting problem.
My ejb is sending a JMSObjectMessage to a queue, this queue is handled by webSphere MQ. there is a MDB listening this queue, but when a onMessage event occurs, _surprise_, my message has a JMSBytesMessage Cast. it changed from JMSObjectsMessage to JMSBytesObject.
Any idea what is happening here?
it seems to me a problem with Mq coding.. am i in the correct path?
Thanks
Breno Leitao
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Breno Henrique Leitão
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| fjb_saper |
| Posted: Mon May 23, 2005 5:57 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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One question:
What are the attributes of your target queue?
More specifically targetClient ?
If you don't have the RFH header I would expect your JMSObjectMessage to be returned as JMSBytesMessage.
Just extract the bytes, put them into a byte output stream ... use that as byte input stream and get your object from the object input stream.
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| leitao |
| Posted: Mon May 23, 2005 6:50 am Post subject: |
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Joined: 23 May 2005
Posts: 22
Location: Campinas - São Paulo - Brasil
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fjb_saper,
Sorry, what is RFH?
I suppose the code is correct, once it was running in jboss, and am i porting to the websphere + mq. So, i dont wish to change the code.\
Any idea?
Thanks in advance
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Breno Henrique Leitão
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| jefflowrey |
| Posted: Mon May 23, 2005 6:52 am Post subject: |
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Grand Poobah
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The RFH is technically known as the MQRFH2 header. It provides an additional set of mapping between the JMS header fields and the MQ header fields.
Confirm that the targetClient property of the QueueDestination you are using is set to "JMS".
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| leitao |
| Posted: Mon May 23, 2005 6:52 am Post subject: |
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Joined: 23 May 2005
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BTW, what is the attributes of my targetQUEUE/targetClient you wanna see?
Thank you
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| jefflowrey |
| Posted: Mon May 23, 2005 6:56 am Post subject: |
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Grand Poobah
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| leitao wrote: |
| BTW, what is the attributes of my targetQUEUE/targetClient you wanna see? |
The property of the Queue Destination that you are retrieving or creating, that is called 'targetClient'.
If you do not understand this, ask your WAS administrator.
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| leitao |
| Posted: Mon May 23, 2005 7:37 am Post subject: |
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Sure,
I got confused once i use a portuguese translation of WebSphere.
My targetClient is JMS. it was MQ before, and i changed it to JMS and the same problems still ocurring.
Thank you
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Breno Henrique Leitão
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| leitao |
| Posted: Mon May 23, 2005 8:10 am Post subject: |
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Look:
<factories xmi:type="resources.jms.mqseries:MQQueue" xmi:id="MQQueue_1115725008085" name="StartProcessReceive" jndiName="queue/cbill/StartProcessReceive" persistence="APPLICATION_DEFINED" priority="APPLICATION_DEFINED" specifiedPriority="0" expiry="APPLICATION_DEFINED" specifiedExpiry="0" baseQueueName="START.PROCESS.RECEIVE" useNativeEncoding="false" integerEncoding="Normal" decimalEncoding="Normal" floatingPointEncoding="IEEENormal" targetClient="JMS" queueManagerPort="0"/>
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| fjb_saper |
| Posted: Mon May 23, 2005 10:11 am Post subject: |
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Grand High Poobah
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| leitao wrote: |
Sure,
I got confused once i use a portuguese translation of WebSphere.
My targetClient is JMS. it was MQ before, and i changed it to JMS and the same problems still ocurring.
Thank you |
But is it JMS on both the sending and the receiving side ?
By the way in the URI you do not specify JMS or MQ but the values 0 or 1....(see Using java manual and values of constants)
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| leitao |
| Posted: Tue May 24, 2005 3:14 am Post subject: |
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| Quote: |
| But is it JMS on both the sending and the receiving side ? |
I am supposed to configure JMS or MQ only in the queue, in Resources->WebSphere MQ. Nothing to see with sender and receiver (MDB). Correct?
| Quote: |
| By the way in the URI you do not specify JMS or MQ but the values 0 or 1....(see Using java manual and values of constants) |
That's the way the config file was in my filesystem. I don't know. it's unlikely to be wrong. don't forget i am using Websphere 5.0.
Thanks
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| fjb_saper |
| Posted: Tue May 24, 2005 12:16 pm Post subject: |
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Grand High Poobah
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No but all with the JMSDestinations.
If you're using WAS you are correct and the parm for the targetClient will take "JMS" or "MQ".
Now the real problem is the setting for the sender application. I understand your receiver is an MDB. If the producer/sender is a legacy (non JMS) system it is very unlikely that you will get an RFH header.
The JMS Destination for the sender application must be defined as targetClient=JMS. If it is not the RFH header gets stripped from the message at put time and you never get it.
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| leitao |
| Posted: Tue May 24, 2005 12:25 pm Post subject: |
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Hey Man,
It worked, you were fully correct. The problem was with an MQ Destionation Queue that i did see.
Tks
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