java结合WebSphere MQ实现接收队列文件功能

首先我们先来简单介绍下websphere mq以及安装使用简介

websphere mq  : 用于传输信息 具有跨平台的功能。

1 安装websphere mq 并启动

2 websphere mq 建立 queue Manager (如：MQSI_SAMPLE_QM)

3 建立queue 类型选择 Local类型 的 （如lq  ）

4 建立channels 类型选择Server Connection （如BridgeChannel）

接下来，我们来看实例代码：

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分组接收文件功能
 * 主动轮询
 */
public class MQFileReceiver {
  private MQQueueManager qmgr; // 连接到队列管理器

  private MQQueue inQueue; // 传输队列

  private String queueName = ""; // 队列名称

  private String host = ""; //

  private int port = 1414; // 侦听器的端口号

  private String channel = ""; // 通道名称

  private String qmgrName = ""; // 队列管理器

  private MQMessage inMsg; // 创建消息缓冲

  private MQGetMessageOptions gmo; // 设置获取消息选项

  private static String fileName = null; // 接收队列上的消息并存入文件

  private int ccsid = 0;

  private static String file_dir = null;

  /**
   * 程序的入口
   *
   * @param args
   */
  public static void main(String args[]) {
    MQFileReceiver mfs = new MQFileReceiver();
    //初始化连接
    mfs.initproperty();
    //接收文件
    mfs.runGoupReceiver();
    //获取shell脚本名
//   String shellname = MQConfig.getValueByKey(fileName);
//   if(shellname!=null&&!"".equals(shellname)){
//     //调用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("\n Backing out Transaction ");
        qmgr.backout();
        System.exit(2);
      } catch (Exception e) {
        e.printStackTrace();
        System.exit(2);
      }
    } catch (Exception e) {
      e.printStackTrace();
      System.exit(2);
    }
  }

  /**
   * 初始化服务器连接信息
   *
   * @throws Exception
   */
  private void init() throws Exception {
    /* 为客户机连接设置MQEnvironment属性 */
    MQEnvironment.hostname = host;
    MQEnvironment.channel = channel;
    MQEnvironment.port = port;

    /* 连接到队列管理器 */
    qmgr = new MQQueueManager(qmgrName);

    /* 设置队列打开选项以输 */
    int opnOptn = MQConstants.MQOO_INPUT_AS_Q_DEF
        | MQConstants.MQOO_FAIL_IF_QUIESCING;

    /* 打开队列以输 */
    inQueue = qmgr.accessQueue(queueName, opnOptn, null, null, null);
  }

  /**
   * 接受文件的主函数
   *
   * @throws Exception
   */
  public void getGroupMessages() {
    /* 设置获取消息选项 */
    gmo = new MQGetMessageOptions();
    gmo.options = MQConstants.MQGMO_FAIL_IF_QUIESCING;
    gmo.options = gmo.options + MQConstants.MQGMO_SYNCPOINT;
    /* 等待消息 */
    gmo.options = gmo.options + MQConstants.MQGMO_WAIT;
    /* 设置等待时间限制 */
    gmo.waitInterval = 5000;
    /* 只获取消息 */
    gmo.options = gmo.options + MQConstants.MQGMO_ALL_MSGS_AVAILABLE;
    /* 以辑顺序获取消息 */
    gmo.options = gmo.options + MQConstants.MQGMO_LOGICAL_ORDER;
    gmo.matchOptions = MQConstants.MQMO_MATCH_GROUP_ID;
    /* 创建消息缓冲 */
    inMsg = new MQMessage();
    try {
      FileOutputStream fos = null;
      /* 处理组消息 */
      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);
              /* 查看是否是最后消息标识 */
              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 the message without property,do nothing!");
              inMsg.clearMessage();
            }
          } else {
            int msgLength = inMsg.getMessageLength();
            byte[] buffer = new byte[msgLength];
            inMsg.readFully(buffer);
            fos.write(buffer, 0, msgLength);
            /* 查看是否是最后消息标识 */
            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) {
          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.getMQ_QUEUE_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();
    }
  }
}