How to purge/delete message from weblogic JMS queue - weblogic-10.x

Question

Is there and way (apart from consuming the message) I can purge/delete message programmatically from JMS queue. Even if it is possible by wlst command line tool, it will be of much help.

Answer 1

Here is an example in WLST for a Managed Server running on port 7005:
connect('weblogic', 'weblogic', 't3://localhost:7005')
serverRuntime()
cd('/JMSRuntime/ManagedSrv1.jms/JMSServers/MyAppJMSServer/Destinations/MyAppJMSModule!QueueNameToClear')
cmo.deleteMessages('')
The last command should return the number of messages it deleted.

Answer 2

You can use JMX to purge the queue, either from Java or from WLST (Python). You can find the MBean definitions for WLS 10.0 on http://download.oracle.com/docs/cd/E11035_01/wls100/wlsmbeanref/core/index.html.
Here is a basic Java example (don't forget to put weblogic.jar in the CLASSPATH):
import java.util.Hashtable;
import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
import javax.management.ObjectName;
import javax.naming.Context;
import weblogic.management.mbeanservers.runtime.RuntimeServiceMBean;
public class PurgeWLSQueue {
private static final String WLS_USERNAME = "weblogic";
private static final String WLS_PASSWORD = "weblogic";
private static final String WLS_HOST = "localhost";
private static final int WLS_PORT = 7001;
private static final String JMS_SERVER = "wlsbJMSServer";
private static final String JMS_DESTINATION = "test.q";
private static JMXConnector getMBeanServerConnector(String jndiName) throws Exception {
Hashtable<String,String> h = new Hashtable<String,String>();
JMXServiceURL serviceURL = new JMXServiceURL("t3", WLS_HOST, WLS_PORT, jndiName);
h.put(Context.SECURITY_PRINCIPAL, WLS_USERNAME);
h.put(Context.SECURITY_CREDENTIALS, WLS_PASSWORD);
h.put(JMXConnectorFactory.PROTOCOL_PROVIDER_PACKAGES, "weblogic.management.remote");
JMXConnector connector = JMXConnectorFactory.connect(serviceURL, h);
return connector;
}
public static void main(String[] args) {
try {
JMXConnector connector =
getMBeanServerConnector("/jndi/"+RuntimeServiceMBean.MBEANSERVER_JNDI_NAME);
MBeanServerConnection mbeanServerConnection =
connector.getMBeanServerConnection();
ObjectName service = new ObjectName("com.bea:Name=RuntimeService,Type=weblogic.management.mbeanservers.runtime.RuntimeServiceMBean");
ObjectName serverRuntime = (ObjectName) mbeanServerConnection.getAttribute(service, "ServerRuntime");
ObjectName jmsRuntime = (ObjectName) mbeanServerConnection.getAttribute(serverRuntime, "JMSRuntime");
ObjectName[] jmsServers = (ObjectName[]) mbeanServerConnection.getAttribute(jmsRuntime, "JMSServers");
for (ObjectName jmsServer: jmsServers) {
if (JMS_SERVER.equals(jmsServer.getKeyProperty("Name"))) {
ObjectName[] destinations = (ObjectName[]) mbeanServerConnection.getAttribute(jmsServer, "Destinations");
for (ObjectName destination: destinations) {
if (destination.getKeyProperty("Name").endsWith("!"+JMS_DESTINATION)) {
Object o = mbeanServerConnection.invoke(
destination,
"deleteMessages",
new Object[] {""}, // selector expression
new String[] {"java.lang.String"});
System.out.println("Result: "+o);
break;
}
}
break;
}
}
connector.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

Answer 3

Works great on a single node environment, but what happens if you are on an clustered environment with ONE migratable JMSServer (currently on node #1) and this code is executing on node #2. Then there will be no JMSServer available and no message will be deleted.
This is the problem I'm facing right now...
Is there a way to connect to the JMSQueue without having the JMSServer available?
[edit]
Found a solution: Use the domain runtime service instead:
ObjectName service = new ObjectName("com.bea:Name=DomainRuntimeService,Type=weblogic.management.mbeanservers.domainruntime.DomainRuntimeServiceMBean");
and be sure to access the admin port on the WLS-cluster.

Answer 4

if this is one time, the easiest would be to do it through the console...

Answer 5

the program in below link helps you to clear only pending messages from queue based on redelivered message parameter
http://techytalks.blogspot.in/2016/02/deletepurge-pending-messages-from-jms.html