I am writing a small spring boot application that is supposed to monitor queues on an external IBM Queue installation.
I am able to connect via MQXAQueueConnectionFactory, but I have not found a way to discover all remote queues/destinations on that Host programmatically. I don't want to add them fix in my code.
How can I get a list of all existing queues in order to add listeners? I have to mention that an access via REST-API is not possible because this feature has been disabled by the administration.
You can use the IBM MQ Programmable Command Formats. If you installed the IBM MQ samples, the tools/pcf/samples/PCF_DisplayActiveLocalQueues.java gives you an idea for your use case.
Here is how I use it in my unit tests to find all the queues with messages:
import java.io.IOException;
import com.ibm.mq.MQException;
import com.ibm.mq.MQGetMessageOptions;
import com.ibm.mq.MQMessage;
import com.ibm.mq.MQQueue;
import com.ibm.mq.MQQueueManager;
import com.ibm.mq.constants.CMQC;
import com.ibm.mq.constants.CMQCFC;
import com.ibm.mq.constants.MQConstants;
import com.ibm.mq.headers.MQDataException;
import com.ibm.mq.headers.pcf.PCFMessage;
import com.ibm.mq.headers.pcf.PCFMessageAgent;
public class MqUtils {
public static void queuesWithMessages(MQQueueManager qmgr) {
try {
PCFMessageAgent agent = new PCFMessageAgent(qmgr);
try {
PCFMessage request = new PCFMessage(CMQCFC.MQCMD_INQUIRE_Q);
// NOTE: You can not use a queue name pattern like "FOO.*" together with
// the "addFilterParameter" method. This is a limitation of PCF messages.
// If you want to filter on queue names, you would have to do it in the
// for loop after sending the PCF message.
request.addParameter(CMQC.MQCA_Q_NAME, "*");
request.addParameter(CMQC.MQIA_Q_TYPE, MQConstants.MQQT_LOCAL);
request.addFilterParameter(CMQC.MQIA_CURRENT_Q_DEPTH, CMQCFC.MQCFOP_GREATER, 0);
for (PCFMessage response : agent.send(request)) {
String queueName = (String) response.getParameterValue(CMQC.MQCA_Q_NAME);
if (queueName == null
|| queueName.startsWith("SYSTEM")
|| queueName.startsWith("AMQ")) {
continue;
}
Integer queueDepth = (Integer) response.getParameterValue(CMQC.MQIA_CURRENT_Q_DEPTH);
// Do something with this queue that has messages
}
} catch (MQException | IOException e) {
throw new RuntimeException(e);
} finally {
agent.disconnect();
}
} catch (MQDataException e) {
throw new RuntimeException(e);
}
}
}
And this should give you ideas how to configure the MQQueueManager (see also IBM docs):
import com.ibm.mq.MQEnvironment;
import com.ibm.mq.MQException;
import com.ibm.mq.MQQueueManager;
#Configuration
static class MQConfig {
#Bean(destroyMethod = "disconnect")
public MQQueueManager mqQueueManager() throws MQException {
MQEnvironment.hostname = "the.host.com";
MQEnvironment.port = 1415;
MQEnvironment.channel = "xxx.CL.FIX";
return new MQQueueManager("xxx");
}
}
The chapter Using with IBM MQ classes for JMS explains how you can use PCF messages in pure JMS.
I am using IBM MQ Classes for JMS (IBM MQ Version 8.0.0.4) with auto-reconnection configured. According to the docs, reconnection happens implicitly. I would like to issue a simple log statement in the event of reconnection. For that reason, I need to somehow get informed, when that happens.
In the IBM docs on page Application Recovery I stumbled over section "Detecting failover" where it says:
Reconnection aware: Register an MQCBT_EVENT_HANDLER event handler with
the queue manager. The event handler is posted with MQRC_RECONNECTING
when the client starts to try to reconnect to the server, and
MQRC_RECONNECTED after a successful reconnection. You can then run a
routine to reestablish a predictable state so that the client
application is able to continue processing.
Unfortunately, I did not find a code example for Java/JMS that demonstrates how and where to register such an event handler. I don't know if that is even supported in my case. Could anyone provide me to the right direction or even provide a code sample? Thank you very much.
Question Update from February 5, 2020:
Added the following code example created by myself, after having received Sashi's initial answer from January 27, 2020.
public static void main(String[] args) {
Connection connection = null;
Session session = null;
Object destination = null;
MessageProducer producer = null;
try {
JmsFactoryFactory jmsFactoryFactory = JmsFactoryFactory.getInstance(WMQConstants.WMQ_PROVIDER);
JmsConnectionFactory cf = jmsFactoryFactory.createConnectionFactory();
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, QM_NAME);
cf.setIntProperty(WMQConstants.WMQ_CLIENT_RECONNECT_OPTIONS, WMQConstants.WMQ_CLIENT_RECONNECT);
cf.setIntProperty(WMQConstants.WMQ_CLIENT_RECONNECT_TIMEOUT, RECONNECT_TIMEOUT);
connection = cf.createConnection();
connection.setExceptionListener(new MQExceptionListener());
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
destination = session.createQueue(QUEUE);
producer = session.createProducer((Destination)destination);
connection.start();
} catch (JMSException ex) {
LOGGER.error(ex.toString());
}
}
public class MQExceptionListener implements ExceptionListener {
public void onException(JMSException e) {
System.out.println(e);
if(e.getLinkedException() != null)
System.out.println(e.getLinkedException());
}
}
This is what I get in the logs:
ERROR [Main.main:57] (main) com.ibm.msg.client.jms.DetailedIllegalStateException: JMSWMQ0018: Failed to connect to queue manager '<hostname>' with connection mode 'Client' and host name '<hostname>(<port>)'.
Check the queue manager is started and if running in client mode, check there is a listener running. Please see the linked exception for more information.
ERROR [Main.main:61] (main) Inner exceptions:
ERROR [Main.main:65] (main) com.ibm.mq.MQException: JMSCMQ0001: IBM MQ call failed with compcode '2' ('MQCC_FAILED') reason '2538' ('MQRC_HOST_NOT_AVAILABLE').
ERROR [Main.main:65] (main) com.ibm.mq.jmqi.JmqiException: CC=2;RC=2538;AMQ9204: Connection to host '<hostname>(<port>)' rejected. [1=com.ibm.mq.jmqi.JmqiException[CC=2;RC=2538;AMQ9204: Connection to host '<hostname>/<ip>:<port>' rejected. [1=java.net.ConnectException[Connection refused: connect],3=<hostname>/<ip>:<port>,4=TCP,5=Socket.connect]],3=<hostname>(<port>),5=RemoteTCPConnection.bindAndConnectSocket]
ERROR [Main.main:65] (main) com.ibm.mq.jmqi.JmqiException: CC=2;RC=2538;AMQ9204: Connection to host '<hostname>/<ip>:<port>' rejected. [1=java.net.ConnectException[Connection refused: connect],3=<hostname>/<ip>:<port>,4=TCP,5=Socket.connect]
ERROR [Main.main:65] (main) java.net.ConnectException: Connection refused: connect
Question Update from February 11, 2020:
I've added this additions based on feedback received by Sashi on February 5, 2020.
I have tried to build a minimal application that connects to an IBM MQ instance. Here's the code:
Application.java
public class Application {
private static final Logger LOGGER = LoggerFactory.getLogger(Application.class);
public static void main(String[] args) {
new Application().run();
}
private void run() {
MQWriter writer = new MQWriter();
int i = 1;
while (true) {
String message = "Hello Testing " + i;
LOGGER.info("Sending message {} to MQ server...", message);
writer.write(message);
i++;
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
MQConnectionDetails.java
public class MQConnectionDetails {
public static final String HOST = "XXX.XXX.XXX.XXX";
public static final int PORT = 1414;
public static final String QM_NAME = "QM1";
public static final String CHANNEL = "DEV.APP.SVRCONN";
public static final String QUEUE = "DEV.QUEUE.1";
public static final int RECONNECT_TIMEOUT = 60; // 1 minute
}
MQWriter.java
public class MQWriter {
private static final Logger LOGGER = LoggerFactory.getLogger(MQWriter.class);
private Connection connection = null;
private Session session = null;
private Object destination = null;
private MessageProducer producer = null;
public MQWriter() {
try {
JmsFactoryFactory jff = JmsFactoryFactory.getInstance(WMQConstants.WMQ_PROVIDER);
JmsConnectionFactory jcf = jff.createConnectionFactory();
jcf.setStringProperty(WMQConstants.WMQ_HOST_NAME, MQConnectionDetails.HOST);
jcf.setIntProperty(WMQConstants.WMQ_PORT, MQConnectionDetails.PORT);
jcf.setStringProperty(WMQConstants.WMQ_CHANNEL, MQConnectionDetails.CHANNEL);
jcf.setIntProperty(WMQConstants.WMQ_CONNECTION_MODE, WMQConstants.WMQ_CM_CLIENT);
jcf.setStringProperty(WMQConstants.WMQ_QUEUE_MANAGER, MQConnectionDetails.QM_NAME);
jcf.setIntProperty(WMQConstants.WMQ_CLIENT_RECONNECT_OPTIONS, WMQConstants.WMQ_CLIENT_RECONNECT);
jcf.setIntProperty(WMQConstants.WMQ_CLIENT_RECONNECT_TIMEOUT, MQConnectionDetails.RECONNECT_TIMEOUT);
LOGGER.info("Initializing connection to write queue {} on {}:{}...",
MQConnectionDetails.QUEUE,
MQConnectionDetails.HOST,
MQConnectionDetails.PORT);
connection = jcf.createConnection();
connection.setExceptionListener(new MQExceptionListener());
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
destination = session.createQueue(MQConnectionDetails.QUEUE);
producer = session.createProducer((Destination)destination);
connection.start();
} catch (JMSException ex) {
LOGGER.error("Error initializing connection to write queue", ex);
}
}
public void write(String message) {
try {
TextMessage textMessage = session.createTextMessage(message);
producer.send(textMessage);
} catch (Exception ex) {
LOGGER.error("Error sending message to write queue", ex);
}
}
}
MQExceptionListener.java
public class MQExceptionListener implements ExceptionListener {
private static final Logger LOGGER = LoggerFactory.getLogger(MQExceptionListener.class);
public void onException(JMSException ex) {
LOGGER.error("=====");
LOGGER.error(ex.toString());
if (ex.getLinkedException() != null) {
LOGGER.error(ex.getLinkedException().toString());
}
LOGGER.error("=====");
}
}
The test scenario I ran is like this:
Make sure, IBM MQ is available on TCP port 1414 (IBM MQ Docker container running on Amazon EC2).
Run the application above (Application.java) and make sure it sends messages to the queue.
Change firewall config on Amazon EC2 security groups by changing port from 1414 to 1415, which makes IBM MQ unavailable to the client.
This is what I've observed:
Only after 90 seconds of inactivity, the client started throwing exceptions. I do not understand, because my RECONNECT_TIMEOUT was set to 60 seconds, so 30 seconds off here.
MQExceptionListener is invoked only once (the first time).
There are no reason codes 2544(MQRC_RECONNECTING) only 2009(MQRC_CONNECTION_BROKEN) is present. Why is that?
Here is a summary of the exceptions that got thrown:
Exceptions on console:
2020-02-11 09:50:16,155 INFO [Application.run:21] (main) Sending message Hello Testing 13 to MQ server...
2020-02-11 09:50:17,285 INFO [Application.run:21] (main) Sending message Hello Testing 14 to MQ server...
2020-02-11 09:50:18,413 INFO [Application.run:21] (main) Sending message Hello Testing 15 to MQ server...
2020-02-11 09:50:19,555 INFO [Application.run:21] (main) Sending message Hello Testing 16 to MQ server...
2020-02-11 09:51:45,966 ERROR [MQExceptionListener.onException:14] (JMSCCThreadPoolWorker-6) =====
2020-02-11 09:51:45,966 ERROR [MQExceptionListener.onException:15] (JMSCCThreadPoolWorker-6) com.ibm.msg.client.jms.DetailedJMSException: JMSWMQ1107: A problem with this connection has occurred.
An error has occurred with the IBM MQ JMS connection.
Use the linked exception to determine the cause of this error.
2020-02-11 09:51:45,966 ERROR [MQExceptionListener.onException:17] (JMSCCThreadPoolWorker-6) com.ibm.mq.MQException: MQ delivered an asynchronous event with completion code '2', and reason '2009'.
2020-02-11 09:51:45,966 ERROR [MQExceptionListener.onException:19] (JMSCCThreadPoolWorker-6) =====
2020-02-11 09:51:45,967 ERROR [MQWriter.write:52] (main) Error sending message to write queue
com.ibm.msg.client.jms.DetailedJMSException: JMSWMQ2007: Failed to send a message to destination 'DEV.QUEUE.1'.
JMS attempted to perform an MQPUT or MQPUT1; however IBM MQ reported an error.
Use the linked exception to determine the cause of this error.
at com.ibm.msg.client.wmq.common.internal.Reason.reasonToException(Reason.java:595)
at com.ibm.msg.client.wmq.common.internal.Reason.createException(Reason.java:215)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.checkJmqiCallSuccess(WMQMessageProducer.java:1288)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.checkJmqiCallSuccess(WMQMessageProducer.java:1245)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.access$800(WMQMessageProducer.java:76)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer$SpiIdentifiedProducerShadow.sendInternal(WMQMessageProducer.java:906)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer$ProducerShadow.send(WMQMessageProducer.java:566)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.send(WMQMessageProducer.java:1428)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.sendMessage(JmsMessageProducerImpl.java:855)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.synchronousSendInternal(JmsMessageProducerImpl.java:2055)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.sendInternal(JmsMessageProducerImpl.java:1993)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.send(JmsMessageProducerImpl.java:1486)
at com.ibm.mq.jms.MQMessageProducer.send(MQMessageProducer.java:293)
at org.example.MQWriter.write(MQWriter.java:50)
at org.example.Application.run(Application.java:22)
at org.example.Application.main(Application.java:13)
Caused by: com.ibm.mq.MQException: JMSCMQ0001: IBM MQ call failed with compcode '2' ('MQCC_FAILED') reason '2009' ('MQRC_CONNECTION_BROKEN').
at com.ibm.msg.client.wmq.common.internal.Reason.createException(Reason.java:203)
... 14 more
Caused by: com.ibm.mq.jmqi.JmqiException: CC=2;RC=2009
at com.ibm.mq.jmqi.remote.api.RemoteHconn$ReconnectionState.recordFailure(RemoteHconn.java:4931)
at com.ibm.mq.jmqi.remote.api.RemoteHconn.setReconnectionFailureInner(RemoteHconn.java:2650)
at com.ibm.mq.jmqi.remote.api.RemoteParentHconn.setReconnectionFailure(RemoteParentHconn.java:152)
at com.ibm.mq.jmqi.remote.impl.RemoteReconnectThread.bestHconn(RemoteReconnectThread.java:265)
at com.ibm.mq.jmqi.remote.impl.RemoteReconnectThread.run(RemoteReconnectThread.java:115)
at com.ibm.msg.client.commonservices.workqueue.WorkQueueItem.runTask(WorkQueueItem.java:319)
at com.ibm.msg.client.commonservices.workqueue.SimpleWorkQueueItem.runItem(SimpleWorkQueueItem.java:99)
at com.ibm.msg.client.commonservices.workqueue.WorkQueueItem.run(WorkQueueItem.java:343)
at com.ibm.msg.client.commonservices.workqueue.WorkQueueManager.runWorkQueueItem(WorkQueueManager.java:312)
at com.ibm.msg.client.commonservices.j2se.workqueue.WorkQueueManagerImplementation$ThreadPoolWorker.run(WorkQueueManagerImplementation.java:1227)
2020-02-11 09:51:46,969 INFO [Application.run:21] (main) Sending message Hello Testing 17 to MQ server...
2020-02-11 09:51:46,972 ERROR [MQWriter.write:52] (main) Error sending message to write queue
com.ibm.msg.client.jms.DetailedJMSException: JMSWMQ2007: Failed to send a message to destination 'DEV.QUEUE.1'.
JMS attempted to perform an MQPUT or MQPUT1; however IBM MQ reported an error.
Use the linked exception to determine the cause of this error.
at com.ibm.msg.client.wmq.common.internal.Reason.reasonToException(Reason.java:595)
at com.ibm.msg.client.wmq.common.internal.Reason.createException(Reason.java:215)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.checkJmqiCallSuccess(WMQMessageProducer.java:1288)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.checkJmqiCallSuccess(WMQMessageProducer.java:1245)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.access$800(WMQMessageProducer.java:76)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer$SpiIdentifiedProducerShadow.sendInternal(WMQMessageProducer.java:906)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer$ProducerShadow.send(WMQMessageProducer.java:566)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.send(WMQMessageProducer.java:1428)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.sendMessage(JmsMessageProducerImpl.java:855)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.synchronousSendInternal(JmsMessageProducerImpl.java:2055)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.sendInternal(JmsMessageProducerImpl.java:1993)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.send(JmsMessageProducerImpl.java:1486)
at com.ibm.mq.jms.MQMessageProducer.send(MQMessageProducer.java:293)
at org.example.MQWriter.write(MQWriter.java:50)
at org.example.Application.run(Application.java:22)
at org.example.Application.main(Application.java:13)
Caused by: com.ibm.mq.MQException: JMSCMQ0001: IBM MQ call failed with compcode '2' ('MQCC_FAILED') reason '2009' ('MQRC_CONNECTION_BROKEN').
at com.ibm.msg.client.wmq.common.internal.Reason.createException(Reason.java:203)
... 14 more
Caused by: com.ibm.mq.jmqi.JmqiException: CC=2;RC=2009
at com.ibm.mq.jmqi.remote.api.RemoteHconn$ReconnectionState.recordFailure(RemoteHconn.java:4931)
at com.ibm.mq.jmqi.remote.api.RemoteHconn.setReconnectionFailureInner(RemoteHconn.java:2650)
at com.ibm.mq.jmqi.remote.api.RemoteParentHconn.setReconnectionFailure(RemoteParentHconn.java:152)
at com.ibm.mq.jmqi.remote.impl.RemoteReconnectThread.bestHconn(RemoteReconnectThread.java:265)
at com.ibm.mq.jmqi.remote.impl.RemoteReconnectThread.run(RemoteReconnectThread.java:115)
at com.ibm.msg.client.commonservices.workqueue.WorkQueueItem.runTask(WorkQueueItem.java:319)
at com.ibm.msg.client.commonservices.workqueue.SimpleWorkQueueItem.runItem(SimpleWorkQueueItem.java:99)
at com.ibm.msg.client.commonservices.workqueue.WorkQueueItem.run(WorkQueueItem.java:343)
at com.ibm.msg.client.commonservices.workqueue.WorkQueueManager.runWorkQueueItem(WorkQueueManager.java:312)
at com.ibm.msg.client.commonservices.j2se.workqueue.WorkQueueManagerImplementation$ThreadPoolWorker.run(WorkQueueManagerImplementation.java:1227)
Question Update from February 12, 2020
Added this sample and findings based on JoshMc's answer from February 11, 2020. My comments on this sample:
I am now using the MQ* classes and set reconnect options as suggested.
Reconnect is still not happening though
MQWriter2.java
public class MQWriter2 {
private static final Logger LOGGER = LoggerFactory.getLogger(MQWriter2.class);
private Connection connection = null;
private Session session = null;
private Queue destination = null;
private MessageProducer producer = null;
public MQWriter2() {
try {
MQConnectionFactory factory = new MQConnectionFactory();
factory.setTransportType(WMQConstants.WMQ_CM_CLIENT);
factory.setConnectionNameList("XXX.XXX.XXX.XXX(1414)");
factory.setQueueManager(MQConnectionDetails.QM_NAME);
factory.setChannel(MQConnectionDetails.CHANNEL);
factory.setClientReconnectOptions(WMQConstants.WMQ_CLIENT_RECONNECT);
factory.setClientReconnectTimeout(MQConnectionDetails.RECONNECT_TIMEOUT);
LOGGER.info("Initializing connection to write queue {} on {}:{}...",
MQConnectionDetails.QUEUE,
MQConnectionDetails.HOST,
MQConnectionDetails.PORT);
connection = factory.createConnection();
connection.setExceptionListener(new MQExceptionListener());
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
destination = session.createQueue(MQConnectionDetails.QUEUE);
producer = session.createProducer(destination);
connection.start();
} catch (JMSException ex) {
LOGGER.error("Error initializing connection to write queue", ex);
}
}
public void write(String message) {
try {
TextMessage textMessage = session.createTextMessage(message);
producer.send(textMessage);
} catch (Exception ex) {
LOGGER.error("Error sending message to write queue", ex);
}
}
}
Console Output
2020-02-12 08:39:11,628 INFO [MQWriter2.<init>:29] (main) Initializing connection to write queue DEV.QUEUE.1 on 54.161.121.207:1414...
2020-02-12 08:39:14,552 INFO [Application.run:19] (main) Sending message Hello Testing 1 to MQ server...
2020-02-12 08:39:15,710 INFO [Application.run:19] (main) Sending message Hello Testing 2 to MQ server...
2020-02-12 08:39:16,841 INFO [Application.run:19] (main) Sending message Hello Testing 3 to MQ server...
...
2020-02-12 08:39:41,973 INFO [Application.run:19] (main) Sending message Hello Testing 25 to MQ server...
2020-02-12 08:41:27,314 ERROR [MQExceptionListener.onException:14] (JMSCCThreadPoolWorker-10) =====
2020-02-12 08:41:27,314 ERROR [MQExceptionListener.onException:15] (JMSCCThreadPoolWorker-10) com.ibm.msg.client.jms.DetailedJMSException: JMSWMQ1107: A problem with this connection has occurred.
An error has occurred with the IBM MQ JMS connection.
Use the linked exception to determine the cause of this error.
2020-02-12 08:41:27,314 ERROR [MQWriter2.write:49] (main) Error sending message to write queue
com.ibm.msg.client.jms.DetailedJMSException: JMSWMQ2007: Failed to send a message to destination 'DEV.QUEUE.1'.
JMS attempted to perform an MQPUT or MQPUT1; however IBM MQ reported an error.
Use the linked exception to determine the cause of this error.
at com.ibm.msg.client.wmq.common.internal.Reason.reasonToException(Reason.java:595)
at com.ibm.msg.client.wmq.common.internal.Reason.createException(Reason.java:215)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.checkJmqiCallSuccess(WMQMessageProducer.java:1288)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.checkJmqiCallSuccess(WMQMessageProducer.java:1245)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.access$800(WMQMessageProducer.java:76)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer$SpiIdentifiedProducerShadow.sendInternal(WMQMessageProducer.java:906)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer$ProducerShadow.send(WMQMessageProducer.java:566)
at com.ibm.msg.client.wmq.internal.WMQMessageProducer.send(WMQMessageProducer.java:1428)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.sendMessage(JmsMessageProducerImpl.java:855)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.synchronousSendInternal(JmsMessageProducerImpl.java:2055)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.sendInternal(JmsMessageProducerImpl.java:1993)
at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.send(JmsMessageProducerImpl.java:1486)
at com.ibm.mq.jms.MQMessageProducer.send(MQMessageProducer.java:293)
at org.example.MQWriter2.write(MQWriter2.java:47)
at org.example.Application.run(Application.java:20)
at org.example.Application.main(Application.java:11)
Caused by: com.ibm.mq.MQException: JMSCMQ0001: IBM MQ call failed with compcode '2' ('MQCC_FAILED') reason '2009' ('MQRC_CONNECTION_BROKEN').
at com.ibm.msg.client.wmq.common.internal.Reason.createException(Reason.java:203)
... 14 more
Caused by: com.ibm.mq.jmqi.JmqiException: CC=2;RC=2009
at com.ibm.mq.jmqi.remote.api.RemoteHconn$ReconnectionState.recordFailure(RemoteHconn.java:4931)
at com.ibm.mq.jmqi.remote.api.RemoteHconn.setReconnectionFailureInner(RemoteHconn.java:2650)
at com.ibm.mq.jmqi.remote.api.RemoteParentHconn.setReconnectionFailure(RemoteParentHconn.java:152)
at com.ibm.mq.jmqi.remote.impl.RemoteReconnectThread.bestHconn(RemoteReconnectThread.java:265)
at com.ibm.mq.jmqi.remote.impl.RemoteReconnectThread.run(RemoteReconnectThread.java:115)
at com.ibm.msg.client.commonservices.workqueue.WorkQueueItem.runTask(WorkQueueItem.java:319)
at com.ibm.msg.client.commonservices.workqueue.SimpleWorkQueueItem.runItem(SimpleWorkQueueItem.java:99)
at com.ibm.msg.client.commonservices.workqueue.WorkQueueItem.run(WorkQueueItem.java:343)
at com.ibm.msg.client.commonservices.workqueue.WorkQueueManager.runWorkQueueItem(WorkQueueManager.java:312)
at com.ibm.msg.client.commonservices.j2se.workqueue.WorkQueueManagerImplementation$ThreadPoolWorker.run(WorkQueueManagerImplementation.java:1227)
You can set an ExceptionListener on connection object after creating a connection. The onException method of the ExceptionListener gets invoked when reconnection attempts are made. Here is an example:
ExceptionListener exceptionListener = new ExceptionListener(){
#Override
public void onException(JMSException e) {
System.out.println(e);
if(e.getLinkedException() != null)
System.out.println(e.getLinkedException());
}
};
MQQueueConnection connection = (MQQueueConnection) cf.createQueueConnection();
connection.setExceptionListener(exceptionListener);
I faced the same issue as the topic starter. After spending hours sifting information available in the internet, speaking to colleagues and pulling hair in an attempt to make the reconnection work, I gave up and made a decision to work around the problem by emulating that incomprehensible reconnection functionality. I hope it will help other people struggling with IBM MQ. I wrote the class that, basically, does 2 things:
Repeatedly tries to connect to IBM MQ with an increasing interval between attempts.
After connecting, sets an error handler that is fired by IBM MQ when something happens to the connection (using the same logic for reconnection).
First, here's the class itself:
package com.raiks.mqclient;
import javax.jms.Destination;
import javax.jms.JMSConsumer;
import javax.jms.JMSContext;
import javax.jms.JMSException;
import com.ibm.msg.client.jms.JmsConnectionFactory;
import com.ibm.msg.client.wmq.WMQConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.raiks.mqclient.IbmMqMessageListener;
/**
* This class implements the reconnection logic for JMS brokers that don't support it
* In particular, it does it for IBM MQ with its incomprehensible reconnection algorithm
* It's expected that each connection manager receives a separate connection factory
* and a message listener - it's not guaranteed for those to be thread safe
*/
public final class IbmMqJmsConnectionManager {
private static final Logger LOGGER = LoggerFactory.getLogger(IbmMqJmsConnectionManager.class);
private static final int INITIAL_RECONNECTION_DELAY_MS = 6000;
private static final int MAX_RECONNECTION_DELAY_MS = 60000;
private static final String QUEUE_PREIX = "queue:///";
private final String connectorName;
private final JmsConnectionFactory connectionFactory;
private final String queueName;
private final IbmMqMessageListener messageListener;
private final int initialReconnectionDelayMs;
private final int maxReconnectionDelayMs;
public IbmMqJmsConnectionManager(
String connectorName,
JmsConnectionFactory connectionFactory,
String queueName,
IbmMqMessageListener messageListener,
int initialReconnectionDelayMs,
int maxReconnectionDelayMs
) {
this.connectorName = connectorName;
this.connectionFactory = connectionFactory;
this.queueName = queueName;
this.messageListener = messageListener;
this.initialReconnectionDelayMs = initialReconnectionDelayMs;
this.maxReconnectionDelayMs = maxReconnectionDelayMs;
}
/**
* Attempts to connect to a JMS broker and makes continuous retries with an increasing interval if fails
* When the maximum interval is reached, issues an error and keeps on trying
* Sets the exception listener (a callback) in the created JMSContext which calls this method when the
* connection with the broker goes down due to network issue or intentional connection termination
*/
public void connectToBrokerWithRetries() {
String connectionDetails = formatConnectionDetails();
LOGGER.info("Attempting to connect to JMS broker '{}'. Connection details = {}", connectorName, connectionDetails);
JMSContext context = null;
int sleepingTimeMs = INITIAL_RECONNECTION_DELAY_MS;
int accumulatedSleepingTimeMs = 0;
// Try to reconnect until we succeed. IMPORTANT! This is a blocking loop that never ends so it must be run in a separate thread
while (context == null) {
try {
context = connectionFactory.createContext(JMSContext.AUTO_ACKNOWLEDGE);
LOGGER.info("Successfully connected to the JMS broker '{}'. Connection details = {}", connectorName, connectionDetails);
boolean hadUnsuccessfulConnectionAttempts = accumulatedSleepingTimeMs > 0;
if (hadUnsuccessfulConnectionAttempts) {
LOGGER.warn(
"Before this successful attempt, I spent {} ms repeatedly trying to connect to '{}'. Please check the broker's health. Connection details = {}",
accumulatedSleepingTimeMs, connectorName, connectionDetails
);
}
Destination destination = context.createQueue(QUEUE_PREIX + queueName);
JMSConsumer jmsConsumer = context.createConsumer(destination);
jmsConsumer.setMessageListener(messageListener);
LOGGER.info("Successfully connected to the queue '{}' at '{}'. Connection details = {}", queueName, connectorName, connectionDetails);
// Sets a callback that will be invoked when something happens with a connection to a broker
context.setExceptionListener(
jmsException -> {
LOGGER.warn("Something bad happened to JMS broker connection to '{}'. I will try to reconnect. Connection details = {}", connectorName, connectionDetails);
connectToBrokerWithRetries();
}
);
} catch (Exception e) {
LOGGER.warn(
"Failed to create a JMS context for '{}'. I will wait for {} ms and then make a reconnection attempt. Connection details = {}",
connectorName, sleepingTimeMs, connectionDetails, e
);
context = null;
try {
Thread.sleep(sleepingTimeMs);
accumulatedSleepingTimeMs += sleepingTimeMs;
int doubledSleepingTime = sleepingTimeMs * 2;
// We double the sleeping time on each subsequent attempt until we hit the limit
// Then we just keep on reconnecting forever using the limit value
boolean nextReconnectionDelayWillExceedMaxDelay = doubledSleepingTime >= MAX_RECONNECTION_DELAY_MS;
if (nextReconnectionDelayWillExceedMaxDelay) {
sleepingTimeMs = MAX_RECONNECTION_DELAY_MS;
LOGGER.error(
"Repeatedly failed to create a JMS context for {} ms. I will keep on trying every {} ms but please check the broker availability. Connection details = {}",
accumulatedSleepingTimeMs, sleepingTimeMs, connectionDetails
);
} else {
sleepingTimeMs = doubledSleepingTime;
}
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}
}
}
}
private String formatConnectionDetails() {
String connectionDetails = "[]";
try {
connectionDetails = String.format(
"[ host = %s, port = %d, queueManager = %s, channel = %s, user = %s ]",
connectionFactory.getStringProperty(WMQConstants.WMQ_HOST_NAME),
connectionFactory.getIntProperty(WMQConstants.WMQ_PORT),
connectionFactory.getStringProperty(WMQConstants.WMQ_QUEUE_MANAGER),
connectionFactory.getStringProperty(WMQConstants.WMQ_CHANNEL),
connectionFactory.getStringProperty(WMQConstants.USERID)
);
} catch (Exception e) {
LOGGER.warn("Failed to get the connection details. This is not critical, but the details will be unavailable");
}
return connectionDetails;
}
}
And here's how you use it:
LOGGER.info("Starting the initial connection thread");
Thread cftInitialConnectionThread = new Thread(cftConnectionManager::connectToBrokerWithRetries);
cftInitialConnectionThread.start();
Check this piece of Code, for me is working with IBM WMQ 9.2.3, using a 3 node IBM WMQ Multi Instance with Pacemaker on CentOS 8.
package com.ibm.mq.samples.jms;
import javax.jms.Destination;
import javax.jms.JMSConsumer;
import javax.jms.JMSContext;
import javax.jms.JMSException;
import javax.jms.JMSProducer;
import javax.jms.TextMessage;
import com.ibm.msg.client.jms.JmsConnectionFactory;
import com.ibm.msg.client.jms.JmsFactoryFactory;
import com.ibm.msg.client.wmq.WMQConstants;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
public class JmsPutGet {
// System exit status value (assume unset value to be 1)
private static int status = 1;
// Create variables for the connection to MQ
private static final String HOST = "192.168.49.140"; // Host name or IP address
private static final int PORT = 10200; // Listener port for your queue manager
private static final String CHANNEL = "CHANNEL1"; // Channel name
private static final String QMGR = "HAQM1"; // Queue manager name
private static final String APP_USER = ""; // User name that application uses to connect to MQ
private static final String APP_PASSWORD = ""; // Password that the application uses to connect to MQ
private static final String QUEUE_NAME = "SOURCE"; // Queue that the application uses to put and get messages to and from
private static final int RECONNECT_TIMEOUT = 60; // 1 minute
private static JMSContext context = null;
private static Destination destination = null;
public static void main(String[] args) {
// Variables
JMSProducer producer = null;
JMSConsumer consumer = null;
LocalDateTime now = null;
try {
setupResources();
long uniqueNumber = System.currentTimeMillis() % 1000;
TextMessage message = context.createTextMessage("Your lucky number today is " + uniqueNumber);
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu/MM/dd HH:mm:ss");
for(int i=0; i>=0; i++){
producer = context.createProducer();
producer.send(destination, message);
//System.out.println("Sent message:\n " + i + " " + message);
System.out.println("\nMensaje enviado:\n " + i );
now = LocalDateTime.now();
System.out.println(dtf.format(now));
consumer = context.createConsumer(destination); // autoclosable
String receivedMessage = consumer.receiveBody(String.class, 15000); // in ms or 15 seconds
//System.out.println("\nReceived message:\n " + i + " " + receivedMessage);
System.out.println("\nMensaje recibido:\n " + i );
now = LocalDateTime.now();
System.out.println(dtf.format(now));
Thread.sleep(1000);
}
context.close();
recordSuccess();
} catch (Exception ex) {
recordFailure(ex);
System.out.println("DETECTING ERROR... RECONNECTING");
setupResources();
}
} // end main()
private static void setupResources() {
boolean connected = false;
while (!connected) {
try {
// Create a connection factory
JmsFactoryFactory ff = JmsFactoryFactory.getInstance(WMQConstants.WMQ_PROVIDER);
JmsConnectionFactory cf = ff.createConnectionFactory();
// Set the properties
cf.setStringProperty(WMQConstants.WMQ_HOST_NAME, HOST);
cf.setIntProperty(WMQConstants.WMQ_PORT, PORT);
//cf.setStringProperty(WMQConstants.WMQ_CONNECTION_NAME_LIST, "192.168.49.140(10200),192.168.49.131(10200),192.168.49.132(10200)");
cf.setStringProperty(WMQConstants.WMQ_CHANNEL, CHANNEL);
cf.setIntProperty(WMQConstants.WMQ_CONNECTION_MODE, WMQConstants.WMQ_CM_CLIENT);
cf.setStringProperty(WMQConstants.WMQ_QUEUE_MANAGER, QMGR);
cf.setStringProperty(WMQConstants.WMQ_APPLICATIONNAME, "JmsPutGet (JMS)");
cf.setBooleanProperty(WMQConstants.USER_AUTHENTICATION_MQCSP, true);
cf.setStringProperty(WMQConstants.USERID, APP_USER);
cf.setStringProperty(WMQConstants.PASSWORD, APP_PASSWORD);
cf.setIntProperty(WMQConstants.WMQ_CLIENT_RECONNECT_TIMEOUT, RECONNECT_TIMEOUT);
cf.setIntProperty(WMQConstants.WMQ_CLIENT_RECONNECT_OPTIONS, WMQConstants.WMQ_CLIENT_RECONNECT);
//cf.setStringProperty(WMQConstants.WMQ_SSL_CIPHER_SUITE, "*TLS12");
// Create JMS objects
context = cf.createContext();
destination = context.createQueue("queue:///" + QUEUE_NAME);
// no exception? then we connected ok
connected = true;
System.out.println("CONNECTED");
}
catch (JMSException je) {
// sleep and then have another attempt
System.out.println("RECONNECTING");
try {Thread.sleep(30*1000);} catch (InterruptedException ie) {}
}
}
}
private static void recordSuccess() {
System.out.println("SUCCESS");
status = 0;
return;
}
private static void recordFailure(Exception ex) {
if (ex != null) {
if (ex instanceof JMSException) {
processJMSException((JMSException) ex);
} else {
System.out.println(ex);
}
}
System.out.println("FAILURE");
status = -1;
return;
}
private static void processJMSException(JMSException jmsex) {
System.out.println(jmsex);
Throwable innerException = jmsex.getLinkedException();
if (innerException != null) {
System.out.println("Inner exception(s):");
}
while (innerException != null) {
System.out.println(innerException);
innerException = innerException.getCause();
}
return;
}
}
I have added a link in github for any reference https://github.com/fintecheando/IBMMQSample
A few points here that may clear things up for you.
The following line sets the amount of time that MQ will attempt to reconnect to the queue manager once it notices the connection is lost.
jcf.setIntProperty(WMQConstants.WMQ_CLIENT_RECONNECT_TIMEOUT, MQConnectionDetails.RECONNECT_TIMEOUT);
How long it takes the client to notice the connection is broken depends on the type of failure, but in the situation you describe it will be based on the HBINT setting of the SVRCONN channel on the queue manager.
A Heart Beat is sent every HBINT seconds when no other normal traffic is passing over the channel. The TIMEOUT of the channel is based on the HBINT, if the HBINT is less than 60 seconds then the TIMEOUT is twice the HBINT, if the HBINT is 60 seconds or larger, the TIMEOUT is the HBINT plus 60 seconds. The TIMEOUT is based on the last time traffic or a heart beat was sent, not when you changed firewall config, although in this case it appears you were sending a message every seconds so this should have been close.
Based on the logs I'm not sure it is picking up the RECONNECT option as I would expect when the reconnect timeout expired that you would get either of these errors instead of MQRC_CONNECTION_BROKEN:
MQRC_RECONNECT_FAILED
MQRC_RECONNECT_TIMED_OUT
In samples I have, I set it this way, maybe try this instead of the way you are currently setting it:
jcf.setClientReconnectOptions(WMQConstants.WMQ_CLIENT_RECONNECT);
jcf.setClientReconnectTimeout(MQConnectionDetails.RECONNECT_TIMEOUT);
Based on what I see I would guess your HBINT is set to 45 seconds on the SVRCONN channel, and the connection is just timing out with MQRC_CONNECTION_BROKEN at 90 seconds and never attempting to reconnect.
I am able to establish connection to QManager using unsecure channel and was able to do what ever I want to do.
But now I am trying to connect to the same QManage through secure channel; I have got the Security keys ( both public and private key ) generate from MQ server but I am not sure how to incorporate the key and establish MQ connection.
I googled and found some answer which suggested the below approach but it didn't work.
System.setProperty("javax.net.ssl.trustStore","path to public key");
System.setProperty("javax.net.ssl.keyStore","path to private key");
Exception I got.
com.ibm.mq.MQException : MQJE001: Completion Code '2', Reason '2537'.
I would appreciate some guidance or sample code on how to connect to QManager using security key.
#JoshMc -- please find answer to your question below
Are you using IBM MQ Classes for Java or IBM MQ Classes for JMS?
I am using IBM MQ Classes for Java
What version of IBM MQ are the jar files you are using from?
Version 7
What version of MQ is the queue manager you are attempting to connect to?
Version 8
Are you attempting to have MQ validate a client cert (Check the value of SSLCAUTH on the SVRCONN channel)
Yes. I have public and private key generated from MQ server by MQ Admin (I have no access to MQ server) and need to use it to connect to the MQ server.
Paste any errors that show up in the queue managers AMQERR01.LOG when you attempt to connect.
I don't have access to the log file.
Below is working code; I am able to connect to unsecure channel and send message
public void MQSender(){
MQQueueManager QMgr = null;
try {
MQEnvironment.hostname = "hostname";
MQEnvironment.channel = "UNSECURE";
//MQEnvironment.channel = "SECURE";
MQEnvironment.port = 8080;
QMgr = new MQQueueManager("QManager");
int openOptions = MQConstants.MQOO_OUTPUT;
MQQueue queue = QMgr.accessQueue("QNAME",openOptions);
MQPutMessageOptions pmo = new MQPutMessageOptions();
pmo.options = MQConstants.MQPMO_LOGICAL_ORDER | MQConstants.MQPMO_SYNCPOINT;
MQMessage message = new MQMessage();
message.writeString("TEST");
queue.put(message, pmo);
QMgr.commit();
} catch (Exception e) {
if(QMgr!=null){
try {
QMgr.backout();
} catch (MQException e1) {
e1.printStackTrace();
}
}
e.printStackTrace();
}
}
You are missing the option specifying the ciphersuite to use from your code:
MQEnvironment.sslCipherSuite
This knowledge center article may help: https://www.ibm.com/support/knowledgecenter/SSFKSJ_7.5.0/com.ibm.mq.dev.doc/q031220_.htm
And do you have your trusted certs and private cert/key pair in JKS stores?
These should be more like:
System.setProperty("javax.net.ssl.trustStore","path to JKS file containing certificates required to validate server certificate");
System.setProperty("javax.net.ssl.keyStore","path to JKS file containing certificate and private key of the client");
I am new to JMS and have an issue connecting to a remote JMS queue from my standalone client. Any hints on resolving this issue would be highly appreciated.
Right now I have a JavaFX standalone application that runs on multiple clients and a glassfish server 3.1.2.2 running on a remote Unix machine. I am having a hard time pushing messages from my standalone app on to the queue that is residing on the server.
Client Mc: Windows PC (No server installed)
Remote Mc: Unix (GlassFish 3.1.2.2 installed)
JMS resources on the server:
JMS Destination Resource
JNDI Name: jms/ReferralQueue
Physical Destination Name: ReferralQueue
Resource Type: javax.jms.Queue
JMS Connection Factory
Pool Name: jms/ReferralConnectionFactory
JNDI Name: jms/ReferralConnectionFactory
Resource Type: javax.jms.QueueConnectionFactory
JMS Service Type: Embedded
JMS Message Store Type: File
Client Side Code to connect to the server:
jms.properties:
org.omg.CORBA.ORBInitialHost=UNIX MC URL
org.omg.CORBA.ORBInitialPort=7676
Service Locator design to implement resource caching
public class JMSServiceLocator {
private static JMSServiceLocator singletonService = null;
private static QueueConnectionFactory qFactory;
private static Queue queue;
private InitialContext context;
private static Properties properties = new Properties();
private Map cache;
static {
try {
singletonService = new JMSServiceLocator();
} catch (Exception e) {
//error handling
}
}
private JMSServiceLocator() {
try {
loadProperties();
context = new InitialContext(properties);
cache = Collections.synchronizedMap(new HashMap());
} catch (Exception e) {
//error handling
}
}
public static JMSServiceLocator getInstance() {
return singletonService;
}
public QueueConnectionFactory getQueueConnectionFactory() {
String qConnFactoryName = "jms/ReferralConnectionFactory";
qFactory = null;
try {
System.out.println("/********************Comment after Testing*****************************/");
Hashtable env = context.getEnvironment();
System.out.println("**env.size::" + env.size());
Enumeration names = env.keys();
while (names.hasMoreElements()) {
String str = (String) names.nextElement();
System.out.println("**" + str + "=" + env.get(str));
}
System.out.println("/**********************************************************************/");
if (cache.containsKey(qConnFactoryName)) {
qFactory = (QueueConnectionFactory) cache.get(qConnFactoryName);
} else {
qFactory = (QueueConnectionFactory) context.lookup(qConnFactoryName);
cache.put(qConnFactoryName, qFactory);
}
} catch (Exception e) {
//error handling
}
return qFactory;
}
public Queue getQueue() {
String queueName = "jms/ReferralQueue";
queue = null;
try {
if (cache.containsKey(queueName)) {
queue = (Queue) cache.get(queueName);
} else {
queue = (Queue) context.lookup(queueName);
cache.put(queueName, queue);
}
} catch (Exception e) {
//error handling
}
return queue;
}
private static void loadProperties() {
//Load jms properties
}
}
Eventually sending message to the server:
JMSServiceLocator jmsLocator = JMSServiceLocator.getInstance();
QueueConnectionFactory qConnFactory = jmsLocator.getQueueConnectionFactory();
qConnection = qConnFactory.createQueueConnection();
session = qConnection.createSession(false, ession.AUTO_ACKNOWLEDGE);
queue = jmsLocator.getQueue();
// Push and publish the message
messageProducer = session.createProducer(queue);
textMessage = session.createTextMessage();
textMessage.setText(message);
messageProducer.send(textMessage);
Hmmm... Now I observe a strange behavior...
I created a new GlassFish 3.1.2.2 server instance on the client machine with no jndi, no connection factories, and no jms queues what so ever.
I have started this server instance and executed the standalone client application. Strangely, everything works fine and the message is directly being pushed to the remote queue.
Did any one come across this kind of issue? I am suspecting that probably the application is loading the dependent GlassFish jars in the classpath only when a server instance (could be any random instance, totally unrelated) is started.
I have the following jars in my standalone application classpath:
*C:\Program Files\glassfish-3.1.2.2\glassfish\lib\gf-client.jar
*C:\Program Files\glassfish-3.1.2.2\glassfish\lib\appserv-rt.jar
*C:\Program Files\glassfish-3.1.2.2\glassfish\lib\install\applications\jmsra\imqbroker.jar
*C:\Program Files\glassfish-3.1.2.2\glassfish\lib\install\applications\jmsra\imqjmsra.jar
I have also posted this on Oracle JMS and GlassFish forums and haven't got a solution. Any help on this issue would be highly appreciated.
Thanks.
I think you found out by now what the problem was:
the JMS client jars were missing on the client (Client Mc: Windows PC (No server installed)).
You don't need a full Glassfish installation on the clients but only the JMS client jars (gf-client.jar) plus all the other jars referenced by gf-client.jar.
I am using IBM.XMS 2.0.0.5 and MQ Client 7.0.1.5 and have created a connection, set the exception listener, started the connection and started listening for messages using a message listener. This works fine, except that the ExceptionListener does not fire when I disable the network connection. Instead I get an unhandled socket exception.
I have gone back to the example given on the IBM site and recreated the error:
If I disable the network connetion I get the unhandled socket exception and the exceptionListener does not get fired.
using System;
using System.Threading;
using IBM.XMS;
public class Sample
{
public static void Main()
{
XMSFactoryFactory factoryFactory = XMSFactoryFactory.GetInstance(XMSC.CT_WMQ);
IConnectionFactory connectionFactory = factoryFactory.CreateConnectionFactory();
connectionFactory.SetStringProperty(XMSC.WMQ_HOST_NAME, "**********");
connectionFactory.SetStringProperty(XMSC.WMQ_CHANNEL, "*****");
connectionFactory.SetIntProperty(XMSC.WMQ_PORT, 1414);
connectionFactory.SetIntProperty(XMSC.WMQ_CONNECTION_MODE, XMSC.WMQ_CM_CLIENT);
connectionFactory.SetStringProperty(XMSC.WMQ_QUEUE_MANAGER, "*********");
//
// Create the connection and register an exception listener
//
IConnection connection = connectionFactory.CreateConnection();
connection.ExceptionListener = new ExceptionListener(OnException);
ISession session = connection.CreateSession(false, AcknowledgeMode.AutoAcknowledge);
IDestination queue = session.CreateQueue("queue://***********");
//
// Create the consumer and register an async message listener
//
IMessageConsumer consumer = session.CreateConsumer(queue);
consumer.MessageListener = new MessageListener(OnMessage);
connection.Start();
while (true)
{
Console.WriteLine("Waiting for messages....");
Thread.Sleep(1000);
}
}
static void OnMessage(IMessage msg)
{
Console.WriteLine(msg);
}
static void OnException(Exception ex)
{
Console.WriteLine(ex);
}
}
I'll put the answer up in the hope that it saves someone the time it wasted for me.
You need to use an unmanaged client connection in order to connect up an exception listener to your connection.
connectionFactory.SetIntProperty(XMSC.WMQ_CONNECTION_MODE, XMSC.WMQ_CM_CLIENT_UNMANAGED);
If it's just worked in Unmanaged mode, then it's a bug at XMS .NET v2.0.0.5. It should work in Managed mode also (XMSC.WMQ_CM_CLIENT_MANAGED). Please move to the latest fix pack and test again.