WebSphere MQ for Java programming instance-Request/reply-Example

Source code of requester. Java:

import com.ibm.mq.*;public class Requester {    public static void main(String args[]) {        try {            String hostName = "127.0.0.1";            String channel = "CHAN1";            String qManager = "QM1";            String requestQueue = "QL1";            String replyToQueue = "REPLYQ";            String replyToQueueManager = "QM1";            // Set up the MQEnvironment properties for Client Connections            MQEnvironment.hostname = hostName;            MQEnvironment.channel = channel;            MQEnvironment.properties.put(MQC.TRANSPORT_PROPERTY,            MQC.TRANSPORT_MQSERIES);            MQEnvironment.CCSID = 1381;            // Connection To the Queue Manager            MQQueueManager qMgr = new MQQueueManager(qManager);            int openOptions = MQC.MQOO_OUTPUT | MQC.MQOO_FAIL_IF_QUIESCING;            // Open the queue            MQQueue queue = qMgr.accessQueue(requestQueue, openOptions, null,            null, null);            // Set the put message options , we will use the default setting.            MQPutMessageOptions pmo = new MQPutMessageOptions();            pmo.options = pmo.options + MQC.MQPMO_NEW_MSG_ID;            pmo.options = pmo.options + MQC.MQPMO_SYNCPOINT;            MQMessage outMsg = new MQMessage();            // Create the message buffer            outMsg.format = MQC.MQFMT_STRING;            // Set the MQMD format field.            outMsg.messageFlags = MQC.MQMT_REQUEST;            outMsg.replyToQueueName = replyToQueue;            outMsg.replyToQueueManagerName = replyToQueueManager;            // Prepare message with user data            String msgString = "Test Request Message from Requester program ";            outMsg.writeString(msgString);            // Now we put The message on the Queue            queue.put(outMsg, pmo);            // Commit the transaction.            qMgr.commit();            System.out            .println(" The message has been Sussesfully putnn#########");            // Close the the Request Queue            queue.close();            // Set openOption for response queue            openOptions = MQC.MQOO_INPUT_SHARED | MQC.MQOO_FAIL_IF_QUIESCING;            MQQueue respQueue = qMgr.accessQueue(replyToQueue, openOptions,            null, null, null);            MQMessage respMessage = new MQMessage();            MQGetMessageOptions gmo = new MQGetMessageOptions();            gmo.options = gmo.options + MQC.MQGMO_SYNCPOINT;            // Get messages under syncpoint control            gmo.options = gmo.options + MQC.MQGMO_WAIT;            // Wait for Response Message            gmo.matchOptions = MQC.MQMO_MATCH_CORREL_ID;            gmo.waitInterval = 10000;            respMessage.correlationId = outMsg.messageId;            System.out.println("The response message correlID : " + respMessage.correlationId);            // Get the response message.            respQueue.get(respMessage, gmo);            String response = respMessage.readString(respMessage            .getMessageLength());            System.out.println("The response message is : " + response);            qMgr.commit();            respQueue.close();            qMgr.disconnect();        } catch (MQException ex) {            System.out.println("An MQ Error Occurred: Completion Code is :t"            + ex.completionCode + "nn The Reason Code is :t"            + ex.reasonCode);            ex.printStackTrace();        } catch (Exception e) {            e.printStackTrace();        }    }}

 

Responder. Java source code is as follows:

import com.ibm.mq.*;public class Responder {    public static void main(String args[]) {        try {            String hostName = "127.0.0.1";            String channel = "CHAN1";            String qManager = "QM1";            String qName = "QL1";            // Set up the MQEnvironment properties for Client            // Connections            MQEnvironment.hostname = hostName;            MQEnvironment.channel = channel;            MQEnvironment.properties.put(MQC.TRANSPORT_PROPERTY,            MQC.TRANSPORT_MQSERIES);            MQEnvironment.CCSID = 1381;            // Connection To the Queue Manager            MQQueueManager qMgr = new MQQueueManager(qManager);            /*            * Set up the open options to open the queue for out put and            * additionally we have set the option to fail if the queue manager            * is quiescing.            */            int openOptions = MQC.MQOO_INPUT_SHARED            | MQC.MQOO_FAIL_IF_QUIESCING;            // Open the queue            MQQueue queue = qMgr.accessQueue(qName, openOptions, null, null,            null);            // Set the put message options.            MQGetMessageOptions gmo = new MQGetMessageOptions();            gmo.options = gmo.options + MQC.MQGMO_SYNCPOINT;            // Get messages under syncpoint control            gmo.options = gmo.options + MQC.MQGMO_WAIT;            // Wait if no messages on the Queue            gmo.options = gmo.options + MQC.MQGMO_FAIL_IF_QUIESCING;            // Fail if QeueManager Quiescing            gmo.waitInterval = 3000;            // Sets the time limit for the wait.            /*            * Next we Build a message The MQMessage class encapsulates the data            * buffer that contains the actual message data, together with all            * the MQMD parameters that describe the message.            * To            * Build a new message, create a new instance of MQMessage class and            * use writxxx （we will be using writeString method). The put（)            * method of MQQueue also takes an instance of the            * MQPutMessageOptions class as a parameter.            */            MQMessage inMsg = new MQMessage();            // Create the message buffer Get the message from the queue on to the message buffer.            queue.get(inMsg, gmo);            // Read the User data from the message.            String msgString = inMsg.readString(inMsg.getMessageLength());            System.out.println(" The Message from the Queue is : " + msgString);            // Check if message if of type request message and reply to the            // request.            if (inMsg.messageFlags == MQC.MQMT_REQUEST) {                System.out.println("Preparing To Reply To the Request ");                String replyQueueName = inMsg.replyToQueueName;                System.out.println("The reply queue: " + replyQueueName);                openOptions = MQC.MQOO_OUTPUT | MQC.MQOO_FAIL_IF_QUIESCING;                MQQueue respQueue = qMgr.accessQueue(replyQueueName,                openOptions, inMsg.replyToQueueManagerName, null, null);                MQMessage respMessage = new MQMessage();                respMessage.correlationId = inMsg.messageId;                System.out.println("The response CorrelID " + respMessage.correlationId);                MQPutMessageOptions pmo = new MQPutMessageOptions();                respMessage.format = MQC.MQFMT_STRING;                respMessage.messageFlags = MQC.MQMT_REPLY;                String response = "Reply from the Responder Program ";                respMessage.writeString(response);                respQueue.put(respMessage, pmo);                System.out.println("The response Successfully send ");                qMgr.commit();                respQueue.close();            }            queue.close();            qMgr.disconnect();        } catch (MQException ex) {            System.out.println("An MQ Error Occurred: Completion Code is :t"            + ex.completionCode + "nn The Reason Code is :t"            + ex.reasonCode);            ex.printStackTrace();        } catch (Exception e) {            e.printStackTrace();        }    }}