mqjava的简单介绍

本文目录一览：

1、java 监听mq消息底层是用线程实现的吗
2、java怎么将mq接收的文件消息提取出来
3、MQ Java Client 方式和MQ Java Binding方式的区别
4、mq java 怎么判断队列为空
5、java 怎么样调用IBM MQ 或者通信问题
6、java事务中调用mq,如果事务回滚,消息会被撤回吗

java 监听mq消息底层是用线程实现的吗

不是通过线程实现的，它是通过一种注册–通知机制实现的。在java的设计模式中，有一种模式叫：观察者模式，和这个类似。举个例子，本例子是一个简单的监听当数据发生变化时要做的操作。

1，我们先定义一个接口，可以让多个监听者实现pre t=”code” l=”java”public interface IDataListen {

public void update(Object event,Object msg);

}2，实现一监听者

pre t=”code” l=”java”public class DataListen implements IDataListen{

@Override

public void update(Object event, Object arg) {

// TODO Auto-generated method stub

System.out.println(“数据发生了变化”);

}

}3，被监听者

pre t=”code” l=”java”public class DataManager{

private ListIDataListen listenList = new ArrayList();

public void notifyListen(Object event,Object msg){

for(IDataListen dataListen : listenList){

dataListen.update(null, null);

}

public void addListen(IDataListen dataListen){

listenList.add(dataListen);

}

public void updateData(Object msg){

this.notifyListen(null, msg);

}

public static void main(String[] args) {

DataManager dataManager = new DataManager();

IDataListen dataListen1 = new DataListen();

IDataListen dataListen2 = new DataListen();

dataManager.addListen(dataListen1);

dataManager.addListen(dataListen2);

dataManager.updateData(“aaa”);

}

}main方法里面是监听的应用。这样就可以监听DataManager中的updateData行为了，当有数据发生变化时，就可以即时被监听者收到。

java怎么将mq接收的文件消息提取出来

WebSphere MQ 接收发送

添加mq jar

类介绍：

SendMSG：消息发送类。

Main（）：主方法。

SendMSG（）：消息发送方法。

方法描述：

package test;

public class SendMSG{

MQEnvironment.hostname = “192.168.10.201”;

//通道类型为服务器连接通道

MQEnvironment.channel = “tongdao”;

MQEnvironment.CCSID = 1381;

//消息队列端口号

MQEnvironment.port = 10618;

try{

//建立队列管理器QM_SERVER为队列管理器名称

MQQueueManager qMgr = new MQQueueManager(“test”);

int openOptions = MQC.MQOO_INPUT_AS_Q_DEF|MQC.MQOO_OUTPUTMQC.MQOO_INQUIRE;//建立队列INITQ队列名称INITQ为本地队列

MQQueue queue = qMgr.accessQueue(“wanghui”,openOptions,null,null,null);

System.out.println(“成功建立通道”);

MQMessage message = new MQMessage();

message.format = MQC.MQFMT_STRING;

message.characterSet = 1381;

message.writeString(“王辉”);

message.expiry = -1;//设置消息用不过期

queue.put(message);//将消息放入队列

queue.close();//关闭队列

qMgr.disconnect();//断开连接

}catch(EOFExceptione){

e.printStackTrace();

}catch(MQExceptione){

e.printStackTrace();

}catch(Exceptione){

e.printStackTrace();

}

ReceiveMSG:消息接收类。

Main（）：主方法。

ReceiveMSG():消息接收方法。

public class ReceiveMSG {

MQEnvironment.hostname=”192.168.10.201″;//通道类型为服务器连接通道

MQEnvironment.channel=”tongdao”;

MQEnvironment.CCSID=1381;

MQEnvironment.port=10618;

try{

//建立队列管理器QM_SERVER为队列管理器名称

MQQueueManager qMgr = new MQQueueManager(“test”);

int openOptions=MQC.MQOO_INPUT_AS_Q_DEF|MQC.MQOO_OUTPUT|MQC.MQOO_INQUIRE;//建立队列INITQ队列名称INITQ为本地队列

MQQueue queue=qMgr.accessQueue(“wanghui”,openOptions,null,null,null);

System.out.println(“成功建立通道”);

MQMessage message= new MQMessage();

message.format=MQC.MQFMT_STRING;

message.characterSet=1381;

//从队列中获取消息

MQGetMessage Optionspmo=new MQGetMessageOptions();

queue.get(message,pmo);

Stringchars=message.readLine();

System.out.println(chars);

queue.close();//关闭队列

qMgr.disconnect();//断开连接

}catch(EOFExceptione){

e.printStackTrace();

}catch(MQExceptione){

e.printStackTrace();

}catch(Exceptione){

e.printStackTrace();

}

MQ Java Client 方式和MQ Java Binding方式的区别

　MQ Java Binding方式使用JNI(Java Native Interface)类似于MQ 服务器应用程序。

MQSeries Java客户机服务器连接最快的方式是MQ Java Binding方式，这种方式要求MQ Java应用和MQ Server在同一台机器上。使用MQ Java Binding方式避免了建立网络连接的开销，因此，当连接对性能影响很大时，应当选用MQ Java Binding方式。

MQ Java Client方式通过Server端定义的服务器连接通道连接，服务器方需要启动侦听程序。MQ Java Client方式用于Java客户程序和服务器不在同一台机器时进行连接。

客户端连接，建立MQEnvironment类

MQEnvironment.hostname

以下是，客户端连接例子

// ===========================================================================

// Licensed Materials – Property of IBM

// 5639-C34

// (c) Copyright IBM Corp. 1995,1999

// ===========================================================================

// WebSphere MQ M’z Java f sample applet

// This sample runs as an applet using the appletviewer and HTML file,

// using the command :-

// appletviewer MQSample.html

// Output is to the command line, NOT the applet viewer window.

// Note. If you receive WebSphere MQ error 2 reason 2059 and you are sure your

// WebSphere MQ and TCP/IPsetup is correct,

// you should click on the “Applet” selection in the Applet viewer window

// select properties, and change “Network access” to unrestricted.

import com.ibm.mq.*; // Include the WebSphere MQ classes for Java package

public class MQSample extends java.applet.Applet

{

private String hostname = “your_hostname”; // define the name of your

// host to connect to

private String channel = “server_channel”; // define name of channel

// for client to use

// Note. assumes WebSphere MQ Server

// is listening on the default

// TCP/IPport of 1414

private String qManager = “your_Q_manager”; // define name of queue

// manager object to

// connect to.

private MQQueueManager qMgr; // define a queue manager object

// When the class is called, this initialization is done first.

public void init()

{

// Set up WebSphere MQ environment

MQEnvironment.hostname = hostname; // Could have put the

// hostname channel

MQEnvironment.channel = channel; // string directly here!

MQEnvironment.properties.put(MQC.TRANSPORT_PROPERTY,//Set TCP/IPor server

MQC.TRANSPORT_MQSERIES);//Connection

} // end of init

public void start()

{

try {

// Create a connection to the queue manager

qMgr = new MQQueueManager(qManager);

// Set up the options on the queue we wish to open…

// Note. All WebSphere MQ Options are prefixed with MQC in Java.

int openOptions = MQC.MQOO_INPUT_AS_Q_DEF |

MQC.MQOO_OUTPUT ;

// Now specify the queue that we wish to open, and the open options…

MQQueue system_default_local_queue =

qMgr.accessQueue(“SYSTEM.DEFAULT.LOCAL.QUEUE”,

openOptions);

// Define a simple WebSphere MQ message, and write some text in UTF format..

MQMessage hello_world = new MQMessage();

hello_world.writeUTF(“Hello World!”);

// specify the message options…

MQPutMessageOptions pmo = new MQPutMessageOptions(); // accept the defaults,

// same as

// MQPMO_DEFAULT

// constant

// put the message on the queue

system_default_local_queue.put(hello_world,pmo);

// get the message back again…

// First define WebSphere MQ message buffer to receive the message into..

MQMessage retrievedMessage = new MQMessage();

retrievedMessage.messageId = hello_world.messageId;

// Set the get message options..

MQGetMessageOptions gmo = new MQGetMessageOptions(); // accept the defaults

// same as

// MQGMO_DEFAULT

// get the message off the queue..

system_default_local_queue.get(retrievedMessage, gmo);

// And prove we have the message by displaying the UTF message text

String msgText = retrievedMessage.readUTF();

System.out.println(“The message is: ” + msgText);

// Close the queue

system_default_local_queue.close();

// Disconnect from the queue manager

qMgr.disconnect();

}

// If an error has occurred in the above, try to identify what went wrong.

// Was it WebSphere MQ error?

1. WebSphere MQ classes for Java } applet (2/3)

}zk

62 WebSphere MQ 9C Java

}

TBzkN];vr%DCLr,|9Cs(==:

1. ,S=SP\mw

2. +{“Ek SYSTEM.DEFAULT.LOCAL.QUEUE

3. YN!5XD{“

catch (MQException ex)

{

System.out.println(“WebSphere MQ error occurred : Completion code ” +

ex.completionCode +

” Reason code ” + ex.reasonCode);

}

// Was it a Java buffer space error?

catch (java.io.IOException ex)

{

System.out.println(“An error occurred whilst writing to the

message buffer: ” + ex);

}

} // end of start

} // end of sample

mq java 怎么判断队列为空

MQException

该类包含WebSphere MQ 完成代码和错误代码常量的定义。以MQCC_开始的常量是WebSphere MQ 完成代码，而以MQRC_开始的常量则是WebSphere MQ 原因代码。只要出现WebSphere MQ

错误，就会给出MQException。

MQGetMessageOptions

该类包含控制MQQueue.get（）方法行为的选项。

MQManagedObject

该类是MQQueueManager、MQQueue 和MQProcess 类的超类。它提供查询并设置这些资源属性的能力。

——解决方案——————–

去取一次，得到 2033 错误就是没有消息符合你的条件。

使用 PCF 查询队列资料：

/**

* @return current depth of queue connected currently.

* @throws Exception

public QueueInfo queryQueueInfo() throws Exception {

if (!checkStatus2(this.queueManager)) {

throw new IllegalStateException(“Not Connected to queue manager.”);

}

PCFMessageAgent agent = null;

try {

agent = new PCFMessageAgent(this.queueManager);

// Inquiry Queue Name Current Depth.

int[] attrs = {

CMQC.MQCA_Q_NAME, CMQC.MQIA_CURRENT_Q_DEPTH,

CMQC.MQIA_OPEN_INPUT_COUNT, CMQC.MQIA_OPEN_OUTPUT_COUNT,

CMQC.MQIA_Q_TYPE, CMQC.MQIA_DEFINITION_TYPE, CMQC.MQIA_INHIBIT_GET,

CMQC.MQIA_INHIBIT_PUT };

PCFParameter[] parameters = {

new MQCFST(CMQC.MQCA_Q_NAME , getInputQueue().getText().trim()),

new MQCFIL(CMQCFC.MQIACF_Q_ATTRS , attrs) };

// logger.log(“Querying current depth of current queue.”);

MQMessage[] responses = agent.send(CMQCFC.MQCMD_INQUIRE_Q, parameters);

QueueInfo info = new QueueInfo();

for (int i = 0; i responses.length; i++) {

MQCFH cfh = new MQCFH(responses[i]);

// Check the PCF header (MQCFH) in the response message

if (cfh.reason == 0) {

String name = “”;

Integer depth = new Integer(0);

for (int j = 0; j cfh.parameterCount; j++) { // Extract what we want from the returned attributes

PCFParameter p = PCFParameter.nextParameter(responses[i]);

switch (p.getParameter()) {

case CMQC.MQCA_Q_NAME:

name = (String) p.getValue();

info.name = name;

break;

case CMQC.MQIA_CURRENT_Q_DEPTH:

depth = (Integer) p.getValue();

info.depth = depth.intValue();

break;

case CMQC.MQIA_OPEN_INPUT_COUNT:

Integer inputCount = (Integer) p.getValue();

info.inputCount = inputCount.intValue();

break;

case CMQC.MQIA_OPEN_OUTPUT_COUNT:

Integer outputCount = (Integer) p.getValue();

info.outputCount = outputCount.intValue();

break;

case CMQC.MQIA_Q_TYPE:

info.type = ((Integer) p.getValue()).intValue();

break;

case CMQC.MQIA_DEFINITION_TYPE:

info.definitionType = ((Integer) p.getValue()).intValue();

break;

case CMQC.MQIA_INHIBIT_PUT:

info.putNotAllowed = ((Integer) p.getValue()).intValue() == 1;

break; case CMQC.MQIA_INHIBIT_GET:

info.getNotAllowed = ((Integer) p.getValue()).intValue() == 1;

default:

}

// System.out.println(“Queue ” + name + ” curdepth ” + depth);

return info;

} else {

System.out.println(“PCF error:\n” + cfh);

// Walk through the returned parameters describing the error

for (int j = 0; j cfh.parameterCount; j++) {

System.out.println(PCFParameter.nextParameter(responses[0]));

}

throw new Exception(“PCF Error [reason :” + cfh.reason + “]”);

}

return null;

} catch (Exception e) {

throw e;

} finally {

if (agent != null) {

try {

agent.disconnect();

} catch (Exception e) {

logger.log(e);

}

java 怎么样调用IBM MQ 或者通信问题

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 ）

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

java 代码如下：

package test.mq;

import com.ibm.mq.*;

* 成功的访问mq 的java 类

public class FirstMqTest {

// public static void main(String[] args[]){

// FirstMqTest first = new FirstMqTest();

// first.test();

// }

public static void main(String args[]){

FirstMqTest first = new FirstMqTest();

first.test();

}

public void test(){

String qManager = “MQSI_SAMPLE_QM”; //QueueManager name

String qName = “lq”;//Queue Name

try {

//configure connection parameters

MQEnvironment.hostname=”172.16.17.123″;//MQ Server name or IP

//MQEnvironment.port=1414;//listenr port

MQEnvironment.channel=”BridgeChannel”;//Server-Connection Channel

MQEnvironment.CCSID =1381;

// Create a connection to the QueueManager

System.out.println(“Connecting to queue manager: “+qManager);

MQQueueManager qMgr = new MQQueueManager(qManager);

// Set up the options on the queue we wish to open

int openOptions = MQC.MQOO_INPUT_AS_Q_DEF | MQC.MQOO_OUTPUT;

// Now specify the queue that we wish to open and the open options

System.out.println(“Accessing queue: “+qName);

MQQueue queue = qMgr.accessQueue(qName, openOptions);

// Define a simple WebSphere MQ Message …

MQMessage msg = new MQMessage();

// … and write some text in UTF8 format

msg.writeUTF(“Hello, World!”);

// Specify the default put message options

MQPutMessageOptions pmo = new MQPutMessageOptions();

// Put the message to the queue

System.out.println(“Sending a message…”);

* 在此测试一下 mq 的传输次列

for(int j=0;j 5;j++){

String str =”test11111111111″;

str = str+j;

msg.writeUTF(str);

queue.put(msg, pmo);

}

queue.put(msg, pmo);

// Now get the message back again. First define a WebSphere MQ message

// to receive the data

MQMessage rcvMessage = new MQMessage();

// Specify default get message options

MQGetMessageOptions gmo = new MQGetMessageOptions();

// Get the message off the queue.

System.out.println(“…and getting the message back again”);

queue.get(rcvMessage, gmo);

// And display the message text…

String msgText = rcvMessage.readUTF();

System.out.println(“The message is: ” + msgText);

// Close the queue

System.out.println(“Closing the queue”);

queue.close();

// Disconnect from the QueueManager

System.out.println(“Disconnecting from the Queue Manager”);

qMgr.disconnect();

System.out.println(“Done!”);

}

catch (MQException ex) {

System.out.println(“A WebSphere MQ Error occured : Completion Code “

+ ex.completionCode + ” Reason Code ” + ex.reasonCode);

}

catch (java.io.IOException ex) {

System.out.println(“An IOException occured whilst writing to the message buffer: “

+ ex);

}

java事务中调用mq,如果事务回滚,消息会被撤回吗

回。java事务中调用mq是公司开发的平台程序，程序内设置了撤回语言，如果事务回滚消息会被撤回处理，Java的事务处理，如果对数据库进行多次操作，每一次的执行或步骤都是一个事务。

原创文章，作者：小蓝，如若转载，请注明出处：https://www.506064.com/n/291711.html

mqjava的简单介绍

本文目录一览：

java 监听mq消息 底层是用线程实现的吗

java怎么将mq接收的文件消息提取出来

MQ Java Client 方式和MQ Java Binding方式的区别

mq java 怎么判断队列为空

java 怎么样调用IBM MQ 或者通信问题

java事务中调用mq,如果事务回滚,消息会被撤回吗

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java 监听mq消息底层是用线程实现的吗