http://my.oschina.net/cloudcoder/blog/200989
一、环境搭建
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | wget http://download.zeromq.org/zeromq-2.1.7.tar.gztar -xzf zeromq-2.1.7.tar.gzcd zeromq-2.1.7./configuremakesudo make installgit clone https://github.com/nathanmarz/jzmq.gitcd jzmq./autogen.sh./configuremakesudo make install如果没有安装libtool、libuuid-devel则需要先安装，否则安装失败yum install libtoolyum install libuuid-devel |
常见问题：
出现java.lang.UnsatisfiedLinkError: /usr/local/lib/libjzmq.so.0.0.0: libzmq.so.1: cannot open shared object file: No such file or directory异常
原因是未找到zmq动态链接库。
解决方法1：export LD_LIBRARY_PATH=/usr/local/lib
解决方法2：编辑/etc/ld.so.conf文件，增加一行：/usr/local/lib。再执行sudo ldconfig命令
Exception in thread "main" java.lang.UnsatisfiedLinkError: no jzmq in java.library.path
未设置native library
在eclipse设置native library为/usr/local/lib
或在jvm增加参数
-Djava.library.path=/usr/local/lib
或在启动脚本中增加
java -Djava.library.path=/usr/local/lib
二、使用jzmq进行编程
1.创建maven项目，pom.xml的内容参见pom.xml
注意：jzmq的版本不能太高，建议使用2.1.0，目前storm也是使用这个版本的jzmq-2.1.0.jar
否则报： java.lang.UnsatisfiedLinkError: org.zeromq.ZMQ$Socket.nativeInit()V
2.编写Publisher.java,Subscriber.java,参见源代码
Publisher.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | packagecom.catt.mqtest.pubsub;importorg.slf4j.Logger;importorg.slf4j.LoggerFactory;importorg.zeromq.ZMQ;importorg.zeromq.ZMQ.Context;importorg.zeromq.ZMQ.Socket;publicclassPublisher { // 等待10个订阅者 privatestaticfinalintSUBSCRIBERS_EXPECTED = 10; // 定义一个全局的记录器，通过LoggerFactory获取 privatefinalstaticLogger log = LoggerFactory.getLogger(Publisher.class); publicstaticvoidmain(String[] args) throwsInterruptedException{ Context context = ZMQ.context(1); Socket publisher = context.socket(ZMQ.PUB); publisher.bind("tcp://*:5557"); try{ // zmq发送速度太快，在订阅者尚未与发布者建立联系时，已经开始了数据发布 Thread.sleep(1000); } catch(InterruptedException e) { e.printStackTrace(); } publisher.send("send start......".getBytes(), 0); for(inti = 0; i < 10; i++) { publisher.send(("Hello world "+i).getBytes(), ZMQ.NOBLOCK); } publisher.send("send end......".getBytes(), 0); publisher.close(); context.term(); }} |
Subscriber.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | packagecom.catt.mqtest.pubsub;importorg.slf4j.Logger;importorg.slf4j.LoggerFactory;importorg.zeromq.ZMQ;importorg.zeromq.ZMQ.Context;importorg.zeromq.ZMQ.Socket;publicclassSubscriber { // 定义一个全局的记录器，通过LoggerFactory获取 privatefinalstaticLogger log = LoggerFactory.getLogger(Subscriber.class); publicstaticvoidmain(String[] args) { Context context = ZMQ.context(1); Socket subscriber = context.socket(ZMQ.SUB); subscriber.connect("tcp://192.168.230.128:5557"); subscriber.subscribe("".getBytes()); inttotal = 0; while(true) { byte[] stringValue = subscriber.recv(0); String string = newString(stringValue); if(string.equals("send end......")) { break; } total++; System.out.println("Received "+ total + " updates. :"+ string); } subscriber.close(); context.term(); }} |
pom.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | <projectxmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.catt</groupId> <artifactId>mqtest</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>mqtest</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.zeromq</groupId> <artifactId>jzmq</artifactId> <version>2.1.0</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.10</version> <scope>test</scope> </dependency> </dependencies></project> |
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