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| Two phase commit |
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| Seshagiri |
 Posted: Sun Oct 09, 2011 10:15 am Post subject: Two phase commit |
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Apprentice
Joined: 04 Oct 2011
Posts: 42
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Hi,
I am using 2 phase commit in java application(stand alone application that connects to queuemanager and gets the message from a queue and inserts the info into database) . when I commit the the MQ the data is not shown in the database tables. But if i close the oracle connection I am able to see the data in tables. Is this correct. The problem here is every time I need to get new connection for the next unit of work. |
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| zpat |
| Posted: Sun Oct 09, 2011 11:41 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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| Do you understand what 2 phase commit is? It is not two commits. It is one commit over two resources. Look up XA cooordination. |
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| bruce2359 |
| Posted: Sun Oct 09, 2011 1:00 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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There are some things you need to do in your WMQ configuration to enable the database calls to part of the commit/backout process.
You might want to search google for oracle+wmq+commit+java.
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| Seshagiri |
| Posted: Sun Oct 09, 2011 7:17 pm Post subject: |
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Apprentice
Joined: 04 Oct 2011
Posts: 42
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| zpat wrote: |
| Do you understand what 2 phase commit is? It is not two commits. It is one commit over two resources. Look up XA cooordination. |
Yes you are right. Here I am commiting just MQ.
Please see the code:
1)
Hashtable properties = new Hashtable();
properties.put(MQC.THREAD_AFFINITY, new Boolean(true));
mqp.connectToQmanager(qManager, properties);
public void connectToQmanager(String qManager, Hashtable properties) throws MQException {
qMgr = new MQQueueManager(qManager,properties);
} // End of connectToQmanager
//The above statements connect to Qmanager
2)
con = mqp.getDBConnection(getDataSource());
con.setAutoCommit(false);
private final oracle.jdbc.xa.client.OracleXADataSource getDataSource() {
try {
if (ds == null) {
ds = new oracle.jdbc.xa.client.OracleXADataSource();
ds.setUser(userId);
ds.setPassword(pwd);
ds.setURL(dbURL);
}
}
catch (SQLException se) {
message = "SQLException occurred while creating datasource." + se.getMessage();
utilsObj.errDisplay(title, message, true);
}
return ds;
} // End of getDataSource
this will get the connection for oracle
Note: mqp is a object of MQAPI which is wrapper class fro MQ API's |
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