Develop Reference

Getting JMSException connecting to IBM MQ from Java client

We are trying to connect to IBM MQ from a Java client. We have generated .bindings for JNDI context using the JMSAdmin utility. When connecting to IBM MQ we are getting following exception:
ERR fmbaJMS JMSException: JMSWMQ0018: Failed to connect to queue manager '<queue manager name>' with connection mode 'Client' and host name 'null'
Host name parameter sent is null while .bindings file correctly have
mq/RefAddr/30/Content=localhost(51410)
mq/RefAddr/30/Type=CRSHOSTS
Entries pointing to localhost and port 51410.

Your .bindings file does not look right. What was the JMSAdmin command you used to create it?
MQ0018: Failed to connect to queue manager 'bt.qm.ccxp0'
Is that your queue manager name or QCF? Note: As per the IBM Best Practises, queue manager names should be in uppercase.
To define a QCF (Queue Connection Factory), you would do:
DEFINE QCF(myQCF) QMANAGER(MQA1) CHANNEL(TEST.CHL) HOSTNAME(127.0.0.1) PORT(1414) TRANSPORT(CLIENT) FAILIFQUIESCE(YES)
To define a JMS queue, you would do:
DEFINE Q(mqs.dev.test.q) QUEUE(TEST.Q1) QMANAGER(MQA1) TARGCLIENT(JMS) FAILIFQUIESCE(YES)
Then in your code, you would do the following to load the objects from the MQ JNDI:
Hashtable<String,String> env = new Hashtable<String,String>();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory");
env.put(Context.PROVIDER_URL, "file:/C:/JNDI-Directory");
Context ctx = new InitialContext(env);
QueueConnectionFactory cf = (QueueConnectionFactory) ctx.lookup("myQCF");
Queue q = (Queue) ctx.lookup("mqs.dev.test.q");

how to use connection pooling for creating publisher in JMs using activeMQ

I am using following code for creating publisher every time when i need to add message in topic i will run this , but some time it gives error
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://" + ip + ":" + port );
connection = connectionFactory.createConnection();
connection.setClientID(publisherName);
PooledConnectionFactory pf = new PooledConnectionFactory(connectionFactory);
pf.setMaxConnections(1000);
Session session = connection.createSession(false,session.AUTO_ACKNOWLEDGE);
Topic topic = session.createTopic(TopicName);
MessageProducer messageProducer = session.createProducer(topic);
Error:
javax.jms.InvalidClientIDException: Broker: localhost - Client: AthenaPublisher already connected from tcp://127.0.0.1:44448

Using a pool when setting the client ID will inevitably lead to such errors as you can have only one connection with a given client ID connected to the broker at any given time. In your case you are configuring the pool for 1000 pooled connections so it will happen pretty often that a new connection will be created and the error you've given will be produced. You need to either not use pooling or use a pool with only 1 pooled connection that shares session level resources with you code.

RabbitMQ Consumer connection to rabbitMQ in https domain

I need to receive messages of a queue, but this queue is inside in another machine(AWS instance) with https(https://www.mymachine.com/rabbitmq) but when I want to establish a connection to the queue I get a NullPointerException.
This is a part of code:
factory.setHost(https://www.mymachine.com/rabbitmq);
Connection connection = factory.newConnection();
channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
queueName = channel.queueDeclare().getQueue();
channel.queueBind(queueName, EXCHANGE_NAME, "");

RabbitMQ, by default, does not use HTTP protocol, it uses AMQP protocol.
you have to change the factory.setHost with the ip or hostname.
factory.setHost(yourmachine)
if you need an SSL connection please read:
https://www.rabbitmq.com/ssl.html it is very clear tutorial.

Setting the URL for a JMS connection

The JMS Hello World example shows producers and consumers sending and consuming messages; this is how they seem to create the connection:
ConnectionFactory cf = new com.sun.messaging.ConnectionFactory();
Connection connection = cf.createConnection();
How specify the address and parameters of the remote JMS server?
I want to create an encrypted and compressed connection to an OpenMQ server that is running on another machine. Ideally I would like to use both client and server authentication.

This post seems to provide an example using JMS server address.
This is how it creates a connection. They provide the address and also username and password (admin).
String addressList = "http://127.0.0.1:8080/imqhttp/tunnel";
com.sun.messaging.TopicConnectionFactory topicConnectionFactory = new com.sun.messaging.TopicConnectionFactory();
topicConnectionFactory.setProperty(com.sun.messaging.ConnectionConfiguration.imqAddressList, addressList);
javax.jms.Topic top;
javax.jms.Connection con = topicConnectionFactory.createTopicConnection("admin", "admin");

How can i set MQMD message context in client WebsphereMQ?

Where should I set MQMD message context in client WebsphereMQ?
MQQueueConnectionFactory mqConnectionFactory = new MQQueueConnectionFactory();
mqConnectionFactory.setHostName(producerProperties.getProperty("wmq.host"));
mqConnectionFactory.setPort(Integer.valueOf(producerProperties.getProperty("wmq.port")));
mqConnectionFactory.setTransportType(JMSC.MQJMS_TP_CLIENT_MQ_TCPIP);
mqConnectionFactory.setQueueManager(producerProperties.getProperty("wmq.manager"));
mqConnectionFactory.setChannel("MyChannel");
/**
* Producer Section
*/
// Getting producer connection from the MQ server and starting it
Connection producerConnection = mqConnectionFactory.createConnection();
System.out.println("Going to start the producer connection...");
producerConnection.start();
// JMS messages are sent and received using a Session.
Session producerSession = producerConnection.createSession(false,
Session.AUTO_ACKNOWLEDGE);
// Destination represents here our queue(testQ) on the MQ server.
Destination producerDestination = producerSession.createQueue(producerProperties.getProperty("wmq.queue.name"));
// MessageProducer is used for sending messages
MessageProducer producer = producerSession.createProducer(producerDestination1);
//create text message going to send
TextMessage sendingMessage = producerSession.createTextMessage("Hi Welcome");
sendingMessage.setJMSType(queueName);
System.out.println("Sending the message...");
//sending the message
producer.send(sendingMessage);

See the sample program. If you installed to the default location on Windows, it's at:
"C:\Program Files (x86)\IBM\WebSphere MQ\tools\jms\samples\simple\SimpleMQMDWrite.java"
Or on *NIX platforms at:
/opt/mqm/samp/jms/samples/simple/SimpleMQMDWrite.java

Go to the WMQ Information Center and look up JMSX* and JMS_IBM_* selectors.