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| RFH2 headers? |
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| JMSnewbie_2008 |
 Posted: Mon Mar 31, 2008 2:22 am Post subject: RFH2 headers? |
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Newbie
Joined: 27 Mar 2008
Posts: 3
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I have existing code which makes use of the WebSphere MQ native specific API's..
I need to convert this code to standard JMS so that it will work with multiple JMS providers like activeMQ , Swift MQ along with WebSphere MQ..
if (msgFormat.equals(MQC.MQFMT_RF_HEADER_2.trim())) {
System.out.println("Stripping out RFH2 Header...");
....
} else {
msg.readFully(bytes);
message = new String(bytes);
}
My questions are that
What is the need for the RFH2 header? (sorry i am a newbie)
I would like to remove the dependency of code on RFH2 processing so that i can make my code generic..
Is it possible for me to do this using standard JMS? |
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| Vitor |
| Posted: Mon Mar 31, 2008 2:28 am Post subject: Re: RFH2 headers? |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| JMSnewbie_2008 wrote: |
| What is the need for the RFH2 header? (sorry i am a newbie) |
The RFH2 is where WMQ stores the JMS header information. It's what distingishes (in broad terms) a message processed using the standard API from one processed using JMS or JMS-like technology.
| JMSnewbie_2008 wrote: |
| I would like to remove the dependency of code on RFH2 processing so that i can make my code generic.. |
If you convert to using JMS then the RFH2 is mandatory, and handled for you under the covers by the JMS libraries.
| JMSnewbie_2008 wrote: |
| Is it possible for me to do this using standard JMS? |
WMQ provides a standard JMS interface, which results in an RFH2 on your message invisible to your application. The only time the RFH2 becomes an issue is if you have a mix of JMS/non-JMS applications.
 the Using Java manual (or it's online equivalent) which explains all this in detail, including how the JMS headers are mapped onto the RFH2 & MQMD.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| JMSnewbie_2008 |
| Posted: Mon Mar 31, 2008 4:37 am Post subject: Re: RFH2 headers? |
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Newbie
Joined: 27 Mar 2008
Posts: 3
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Hello,
Thank you so much for ur reply.
If RFH2 is handled under the covers by the JMS libraries -
This means that if i send and receive javax.jms.TextMessage i don't need to worry about the RFH2 header like i was doing when i used com.ibm.mq.MQMessage?
i.e i) stripping out the RFH2 header from message that is read
ii) explicitly creating RFH2 Header For message before sending
I will go through the Java manual which explains how the JMS headers are mapped onto the RFH2 & MQMD. |
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| Vitor |
| Posted: Mon Mar 31, 2008 4:46 am Post subject: Re: RFH2 headers? |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| JMSnewbie_2008 wrote: |
This means that if i send and receive javax.jms.TextMessage i don't need to worry about the RFH2 header like i was doing when i used com.ibm.mq.MQMessage?
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As I said, the RFH2 is only apparent if you're mixing JMS & non-JMS applications. If the JMS apps in question had specified TARGCLIENT correctly, you wouldn't have needed to worry about it using the other method either.
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Insanity is the best defence. |
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