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| Java Plug-in node help |
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| pfaulkner |
 Posted: Fri Jun 27, 2003 11:27 am Post subject: Java Plug-in node help |
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Master
Joined: 18 Mar 2002
Posts: 241
Location: Colorado, USA
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I am trying to write my first Java Plug-in node and need a little help.
It should be a very simple node, all I need it to do is get the QMgr Name.
This is my code so far:
// -classpath d:\MQSeries\java\lib\com.ibm.mq.jar;d:\MQSI\classes\jplugin.jar
import com.ibm.broker.plugin.*;
import java.io.*;
import java.net.*;
import java.util.*;
public class GetQMgrNameNode extends MbNode implements MbNodeInterface
{
public GetQMgrNameNode() throws MbException
{
createInputTerminal("in");
createOutputTerminal("out");
createOutputTerminal("failure");
}
public void evaluate(MbMessageAssembly assembly, MbInputTerminal in)
throws MbException
{
// Get Broker's Queue Manager Name
//String qmgrname = getBroker().getQueueManagerName();
MbOutputTerminal out = getOutputTerminal("out");
out.propagate(assembly);
}
//-----------------------------------------
public static String getNodeName()
{
return "GetQMgrNameNode";
}
//-----------------------------------------
public String getQMgrName() throws MbException
{
return getBroker().getQueueManagerName();
}
}
Do I need to do anything else?
Also, how do I actually use the node to retrieve the QMGr from my flow?
thanks for any help. The manuals don't seem very clear. |
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| jefflowrey |
| Posted: Fri Jun 27, 2003 12:45 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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You're going to want to change the output assembly in some way, probably by creating an element in the Root tree or in the Environment or Local Environment tree, that will contain the value you've retrieved from getBroker().getQueueManagerName();
Then you can use that from ESQL. |
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| pfaulkner |
| Posted: Mon Jun 30, 2003 7:31 am Post subject: |
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Master
Joined: 18 Mar 2002
Posts: 241
Location: Colorado, USA
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| jefflowrey |
| Posted: Mon Jun 30, 2003 7:59 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| pfaulkner wrote: |
| How do I do that? |
Using Java, of course! 
Here's some code. It should populate Environment.Variables.QueueManagerName with the value returned from getQueueManagerName(). I haven't tested it, so use at your own risk, and it's probably uglier than it should be.
| Code: |
String qmgrname = getBroker().getQueueManagerName();
MbElement envElement = outAssembly.getGlobalEnvironment().getRootElement();
MbElement varElem = envElement.getFirstElementByPath("./Variables");
if (varElem == null) {
varElem = envElement.createElementAsLastChild(MbElement.TYPE_NAME);
varElem.setName("Variables");
}
MbElement qmnElem= varElem.getFirstElementByPath("./QueueManagerName");
if (qmnElem == null) {
qmnElem = varElem.createElementAsFirstChild(MbElement.TYPE_NAME);
qmnElem.setName("QueueManagerName");
MbElement qmnElemVal = qmnElem.createElementAsFirstChild(MbElement.TYPE_VALUE);
qmnElemVal.setValue(qmgrname);
} else {
qmnElem.setValue(qmgrname);
} |
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| pfaulkner |
| Posted: Mon Jun 30, 2003 8:03 am Post subject: |
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Master
Joined: 18 Mar 2002
Posts: 241
Location: Colorado, USA
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| jefflowrey |
| Posted: Mon Jun 30, 2003 10:00 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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I forgot some important bits - making a copy of the input assembly so you can modify the pieces of it.
| Code: |
MbMessage outMsg = new MbMessage(assembly.getMessage());
MbMessage outLEnv = new MbMessage(assembly.getLocalEnvironment());
MbMessage outEnv = new MbMessage(assembly.getGlobalEnvironment());
MbMessage outExc = new MbMessage(assembly.getExceptionList());
MbMessageAssembly outAssembly = new MbMessageAssembly(assembly,outLEnv,outEnv,outExc,outMsg); |
And then propogate the outAssembly instead of the assembly you were passed in your evaluate. |
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