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| Modifying existing client for multi-instance using SVRCONN |
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Message
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| Gideon |
 Posted: Fri Aug 23, 2013 12:55 pm Post subject: Modifying existing client for multi-instance using SVRCONN |
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Chevalier
Joined: 18 Aug 2009
Posts: 403
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I was given Java code using SVRCONN to send messages, below is a portion:
| Code: |
private static String host = "10.14.101.191";
private static int port = 1414;
private static String channel = "SYSTEM.ADMIN.SVRCONN";
private static String qmgr = "WQM";
private static String qName = "TEST";
....
cf.setStringProperty(WMQConstants.WMQ_HOST_NAME, host);
cf.setIntProperty(WMQConstants.WMQ_PORT, port);
cf.setStringProperty(WMQConstants.WMQ_CHANNEL, channel);
cf.setIntProperty(WMQConstants.WMQ_CONNECTION_MODE, WMQConstants.WMQ_CM_CLIENT);
cf.setStringProperty(WMQConstants.WMQ_QUEUE_MANAGER, qmgr); |
For various reasons, I need to continue use of the SVRCONN channel.
All of the documentation I have seen refers to the CONNAME attribute, as follows
| Code: |
| CONNAME('host(port),host(port)') |
However, CONNAME is not an attribute of SVRCONN
Since SVRCONN are 1 socket connections directly assigned to the server, and I can see no examples of how to do this, the only solution I can think of is to connect to the channel, but trap for a JMS exception, something like:
| Code: |
private static String host = "10.14.101.191";
private static String standbyhost = "10.14.101.192";
...
catch (JMSException jmsex) {
System.out.println("-- Switching to standby instance on another IP");
cf.setStringProperty(WMQConstants.WMQ_HOST_NAME, standbyhost);
connection = cf.createConnection();
session = connection.createSession(txEnabled ? true : false, Session.AUTO_ACKNOWLEDGE);
queue = session.createQueue(qName);
producer = session.createProducer(queue);
producer.setDeliveryMode(DeliveryMode.PERSISTENT);
connection.start();
break;
} |
and then reconnect using the other standbyhost IP.
The MQ Explorer must have a solution to this, since they collect two different IP's for a single SVRCONN.
I find my potential solution clunky, what would be the recommended approach to using SVRCONN in a java client when writing for potential failover? |
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| fjb_saper |
| Posted: Sat Aug 24, 2013 6:47 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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You need to use the connectionNameList property of the cf. (value= ('host(port),host(port)')
Have fun 
_________________
MQ & Broker admin |
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