Java combined with WebSphere MQ implements receive queue file functionality _java

Let's start with a brief introduction to WebSphere MQ and installation

WebSphere MQ: A cross-platform feature for transmitting information.

1 Install WebSphere MQ and start

2 WebSphere MQ establish queue Manager (e.g. MQSI_SAMPLE_QM)

3 Establish the queue type select a local type (such as LQ)

4 Establish channels type Select Server Connection (such as Bridgechannel)

Next, let's look at the instance code:

Mqfilereceiver.java package com.mq.dpca.file;
Import Java.io.File;
 
Import Java.io.FileOutputStream;
Import com.ibm.mq.MQEnvironment;
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.MQConstants;
Import Com.mq.dpca.msg.MQConfig;
Import Com.mq.dpca.util.ReadCmdLine;
 
Import Com.mq.dpca.util.RenameUtil; /** * * MQ packet receive file function * Active polling/public class Mqfilereceiver {private Mqqueuemanager qmgr;//Connect to Queue Manager private MQQ Ueue InQueue; Transmission queue Private String queuename = ""; Queue name Private String host = ""; private int port = 1414; The port number of the listener is private String channel = ""; Channel name private String qmgrname = ""; Queue Manager Private Mqmessage inmsg; Create message buffering private mqgetmessageoptions GMO; Set GET message option private static String fileName = null;
 
  Receive messages on queue and save to file private int ccsid = 0; private static String File_diR = null; /** * Program Entry * * @param args/public static void Main (String args[]) {mqfilereceiver MFS = new Mqfile
    Receiver ();
    Initialize connection Mfs.initproperty ();
    Receive file Mfs.rungoupreceiver ();
Gets the shell script name//String Shellname = Mqconfig.getvaluebykey (fileName); if (shellname!=null&&! "". Equals (Shellname)) {////Call Shell//Readcmdline.callshell (shellname);//}else{//System.out.println ("have
No shell name,only receive files. ");
      } public void Rungoupreceiver () {try {init ();
      Getgroupmessages ();
      Qmgr.commit ();
    System.out.println ("\ n Messages successfully Receive");
      catch (Mqexception mqe) {mqe.printstacktrace ();
        try {System.out.println ("\ backing out Transaction");
        Qmgr.backout ();
      System.exit (2);
        catch (Exception e) {e.printstacktrace ();
      System.exit (2); The catch (Exception e) {e.printstacktrace ()};
    System.exit (2); /** * Initialize Server connection information * * @throws Exception * * private void init () throws Exception {/* Set M for client connection
    Qenvironment attribute */mqenvironment.hostname = host;
    Mqenvironment.channel = Channel;
 
    Mqenvironment.port = port;
 
    /* Connect to Queue Manager * * qmgr = new Mqqueuemanager (qmgrname); /* Set queue open option to input/int OPNOPTN = Mqconstants.mqoo_input_as_q_def |
 
    mqconstants.mqoo_fail_if_quiescing;
  /* Open queue to lose/InQueue = Qmgr.accessqueue (queuename, OPNOPTN, NULL, NULL, NULL);  /** * Accept the main function of the file * * @throws Exception/public void Getgroupmessages () {/* Settings get message option * * GMO =
    New Mqgetmessageoptions ();
    Gmo.options = mqconstants.mqgmo_fail_if_quiescing;
    Gmo.options = gmo.options + mqconstants.mqgmo_syncpoint;
    /* Wait Message * * gmo.options = gmo.options + mqconstants.mqgmo_wait;
    /* Set wait time limit */gmo.waitinterval = 5000; /* Only get the message * * gmo.options = gmo.options + Mqconstants.mqgmo_all_msgs_available;
    * * To obtain the message in sequence/gmo.options = gmo.options + Mqconstants.mqgmo_logical_order;
    Gmo.matchoptions = mqconstants.mqmo_match_group_id;
    /* Create Message Buffer * * inmsg = new Mqmessage ();
      try {FileOutputStream fos = null;
          /* Processing Group Message */while (true) {try {inqueue.get (inmsg, GMO);
              if (FOS = = null) {try {filename = inmsg.getstringproperty ("filename");
              String filename_full = null;
              Filename_full = File_dir + renameutil.rename (fileName);
              FOS = new FileOutputStream (new File (Filename_full));
              int msglength = Inmsg.getmessagelength ();
              byte[] buffer = new Byte[msglength];
              inmsg.readfully (buffer);
              Fos.write (buffer, 0, msglength);
              /* See if it is the last message ID/char x = gmo.groupstatus; if (x = = Mqconstants.mqgs_last_msg_in_group) {System.out.println ("last MSG in GrouP ");
              Break
 
            } inmsg.clearmessage (); catch (Exception e) {System.out. println ("Receiver" without Property,do
              Ing! ");
            Inmsg.clearmessage ();
            } else {int msglength = Inmsg.getmessagelength ();
            byte[] buffer = new Byte[msglength];
            inmsg.readfully (buffer);
            Fos.write (buffer, 0, msglength);
            /* See if it is the last message ID/char x = gmo.groupstatus;
              if (x = = Mqconstants.mqgs_last_msg_in_group) {System.out.println ("Last MSG in GROUP");
            Break
          } inmsg.clearmessage ();
          The catch (Exception e) {char x = gmo.groupstatus;
          if (x = = Mqconstants.mqgs_last_msg_in_group) {System.out.println ("Last MSG in GROUP");
        } break; } if (FOS!= null) FOS. Close ();
    catch (Exception e) {System.out.println (E.getmessage ());
    } public void Initproperty () {mqconfig config = new Mqconfig (). getinstance ();
      if (Config.getmq_manager ()!= null) {qmgrname = Config.getmq_manager ();
      QueueName = Config.getm Q_Q ueue_name ();
      Channel = Config.getmq_channel ();
      Host = Config.getmq_host_name ();
      Port = integer.valueof (Config.getmq_prot ());
      Ccsid = integer.valueof (Config.getmq_ccsid ());
    File_dir = Config.getfile_dir (); }
  }
}