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  • websocket redis实现集群即时消息聊天

    websocket与redismq实现集群消息聊天

    1.application.properties

    server.port=8081

#thymeleaf配置
#是否启用模板缓存。
spring.thymeleaf.cache=false
#是否为Web框架启用Thymeleaf视图解析。
spring.thymeleaf.enabled=true
#在SpringEL表达式中启用SpringEL编译器。
spring.thymeleaf.enable-spring-el-compiler=true
#模板文件编码。
spring.thymeleaf.encoding=UTF-8
#要应用于模板的模板模式。另请参见Thymeleaf的TemplateMode枚举。
spring.thymeleaf.mode=HTML5
#在构建URL时添加前缀以查看名称的前缀。
spring.thymeleaf.prefix=classpath:/templates/
#Content-Type写入HTTP响应的值。
spring.thymeleaf.servlet.content-type=text/html
#在构建URL时附加到视图名称的后缀。
spring.thymeleaf.suffix=.html

##单服务器
spring.redis.host=192.168.159.129
##单端口
spring.redis.port=6379
## 连接池最大连接数（使用负值表示没有限制） 
spring.redis.pool.max-active=300
## Redis数据库索引(默认为0) 
spring.redis.database=0
## 连接池最大阻塞等待时间（使用负值表示没有限制） 
spring.redis.pool.max-wait=-1
## 连接池中的最大空闲连接 
spring.redis.pool.max-idle=100
## 连接池中的最小空闲连接 
spring.redis.pool.min-idle=20
## 连接超时时间（毫秒） 
spring.redis.timeout=60000

    2.pom.xml

    <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="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.szw.learn</groupId>
    <artifactId>websocket_redis_mq_01</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>websocket_redis_mq_01</name>
    
    
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.16.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <maven.test.skip>true</maven.test.skip>
        <skipTests>true</skipTests>
        <thymeleaf.version>3.0.7.RELEASE</thymeleaf.version>
        <thymeleaf-layout-dialect.version>2.1.2</thymeleaf-layout-dialect.version>
        <start-class>com.szw.learn.WsMqApplication</start-class>
    </properties>

    <dependencies>
        <!-- 使用web启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- 测试 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- 模板引擎 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        
        <!-- redis id与1.5之前的变了 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        
        <!-- websocket -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-websocket</artifactId>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <id>nexus-aliyun</id>
            <name>Nexus aliyun</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>nexus-aliyun</id>
            <name>Nexus aliyun</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

    <build>
        <plugins>
            <!-- 要将源码放上去，需要加入这个插件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-source-plugin</artifactId>
                <configuration>
                    <attach>true</attach>
                </configuration>
                <executions>
                    <execution>
                        <phase>compile</phase>
                        <goals>
                            <goal>jar</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <!-- 打包 -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

    3.SpringUtils.java

    package com.szw.learn.util;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.stereotype.Repository;

@Repository
public final class SpringUtils implements BeanFactoryPostProcessor {

    private static ConfigurableListableBeanFactory beanFactory; // Spring应用上下文环境

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        SpringUtils.beanFactory = beanFactory;
    }
    
    public static ConfigurableListableBeanFactory getBeanFactory() {
        return beanFactory;
    }

    /**
     * 获取对象
     *
     * @param name
     * @return Object 一个以所给名字注册的bean的实例
     * @throws org.springframework.beans.BeansException
     *
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException {
        return (T) getBeanFactory().getBean(name);
    }

    /**
     * 获取类型为requiredType的对象
     *
     * @param clz
     * @return
     * @throws org.springframework.beans.BeansException
     *
     */
    public static <T> T getBean(Class<T> clz) throws BeansException {
        T result = (T) getBeanFactory().getBean(clz);
        return result;
    }

    /**
     * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true
     *
     * @param name
     * @return boolean
     */
    public static boolean containsBean(String name) {
        return getBeanFactory().containsBean(name);
    }

    /**
     * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）
     *
     * @param name
     * @return boolean
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     *
     */
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return getBeanFactory().isSingleton(name);
    }

    /**
     * @param name
     * @return Class 注册对象的类型
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     *
     */
    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
        return getBeanFactory().getType(name);
    }

    /**
     * 如果给定的bean名字在bean定义中有别名，则返回这些别名
     *
     * @param name
     * @return
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     *
     */
    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
        return getBeanFactory().getAliases(name);
    }

}

    4.redis

    发布service：

    package com.szw.learn.redismq;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

/**
 * @author 七脉 描述：发布service
 */
@Component
public class PublishService {
    @Autowired
    StringRedisTemplate redisTemplate;

    /**
     * @author 七脉 描述：发布方法
     * @param channel 消息发布订阅 主题
     * @param message 消息信息
     */
    public void publish(String channel, Object message) {
        // 该方法封装的 connection.publish(rawChannel, rawMessage);
        redisTemplate.convertAndSend(channel, message);
    }
}

    订阅监听类：

    package com.szw.learn.redismq;

import java.io.IOException;

import javax.websocket.Session;

import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.connection.MessageListener;
import org.springframework.data.redis.core.StringRedisTemplate;

/**
 * @author 七脉 描述：订阅监听类
 */
public class SubscribeListener implements MessageListener {
    
    private StringRedisTemplate stringRedisTemplate;
    
    private Session session;
    
    /**
     * 订阅接收发布者的消息
     */
    @Override
    public void onMessage(Message message, byte[] pattern) {
        String msg = new String(message.getBody());
        System.out.println(new String(pattern) + "主题发布：" + msg);
        if(null!=session){
            try {
                session.getBasicRemote().sendText(msg);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    
    public StringRedisTemplate getStringRedisTemplate() {
        return stringRedisTemplate;
    }

    public void setStringRedisTemplate(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    public Session getSession() {
        return session;
    }

    public void setSession(Session session) {
        this.session = session;
    }
    
}

    注册redis监听容器：

    package com.szw.learn.redismq;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;

@Configuration
public class RedisConfig {
    @Autowired
    private JedisConnectionFactory jedisConnectionFactory;
    
    /**
     * @author 七脉 描述：需要手动注册RedisMessageListenerContainer加入IOC容器
     * @return
     */
    @Bean
    public RedisMessageListenerContainer redisMessageListenerContainer() {

        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        
        container.setConnectionFactory(jedisConnectionFactory);

        return container;

    }
}

    5.websocket

    websocket注册：

    package com.szw.learn.websocket;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;

@Configuration
public class WebsocketConfig {
    /**
     * <br>描 述:    @Endpoint注解的websocket交给ServerEndpointExporter自动注册管理
     * @return
     */
    @Bean
    public ServerEndpointExporter serverEndpointExporter(){
        return new ServerEndpointExporter();
    }
}

    websocket端点：

    package com.szw.learn.websocket;

import java.io.IOException;
import java.util.concurrent.CopyOnWriteArraySet;

import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.listener.ChannelTopic;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.stereotype.Component;

import com.szw.learn.redismq.PublishService;
import com.szw.learn.redismq.SubscribeListener;
import com.szw.learn.util.SpringUtils;
/**
 *@ServerEndpoint(value="/websocket")value值必须以/开路
 *备注:@ServerEndpoint注解类不支持使用@Autowire
 *{topic}指：向哪个频道主题里发消息
 *{myname}指：这个消息是谁的。真实环境里可以使用当前登录用户信息
 */
@Component
@ServerEndpoint(value="/websocket/{topic}/{myname}")
public class WebsocketEndpoint {
    
    /**
     * 因为@ServerEndpoint不支持注入，所以使用SpringUtils获取IOC实例
     */
    private StringRedisTemplate redisTampate = SpringUtils.getBean(StringRedisTemplate.class);
    
    private RedisMessageListenerContainer redisMessageListenerContainer = SpringUtils.getBean(RedisMessageListenerContainer.class);
    
    //存放该服务器该ws的所有连接。用处：比如向所有连接该ws的用户发送通知消息。
    private static CopyOnWriteArraySet<WebsocketEndpoint> sessions = new CopyOnWriteArraySet<>();
    
    private Session session;
    
    @OnOpen
    public void onOpen(Session session,@PathParam("topic")String topic){
        System.out.println("java websocket:打开连接");
        this.session = session;
        sessions.add(this);
        SubscribeListener subscribeListener = new SubscribeListener();
        subscribeListener.setSession(session);
        subscribeListener.setStringRedisTemplate(redisTampate);
        //设置订阅topic
        redisMessageListenerContainer.addMessageListener(subscribeListener, new ChannelTopic(topic));
    }
    
    @OnClose
    public void onClose(Session session){
        System.out.println("java websocket:关闭连接");
        sessions.remove(this);
    }
    
    @OnMessage
    public void onMessage(Session session,String message,@PathParam("topic")String topic,@PathParam("myname")String myname) throws IOException{
        message = myname+"："+message;
        System.out.println("java websocket 收到消息=="+message);
        PublishService publishService = SpringUtils.getBean(PublishService.class);
        publishService.publish(topic, message);
    }
    
    @OnError
    public void onError(Session session,Throwable error){
        System.out.println("java websocket 出现错误");
    }

    public Session getSession() {
        return session;
    }

    public void setSession(Session session) {
        this.session = session;
    }
}

    测试controller

    package com.szw.learn.websocket;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("websocket")
public class WebsocketController {
    
    @Value("${server.port}")
    private String port;
    
    public static final String INDEX = "websocket/index";
    
    /**
     * @author 七脉
     * 描述：聊天页
     * @param topic 发布订阅的频道主题
     * @param myname 发布者的显示名称
     * @return
     */
    @RequestMapping("index/{topic}/{myname}")
    public ModelAndView index(@PathVariable("topic")String topic,@PathVariable("myname")String myname){
        ModelAndView mav = new ModelAndView(INDEX);
        mav.addObject("port", port);
        mav.addObject("topic",topic);
        mav.addObject("myname",myname);
        return mav;
    }
}

    6.启动类

    package com.szw.learn;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class WsMqApplication {
    public static void main(String[] args) {
        System.setProperty("spring.devtools.restart.enabled", "false");
        SpringApplication.run(WsMqApplication.class, args);
    }
}

    7.测试页面

    <!doctype html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="utf-8"></meta>
<title>websocket集群</title>
</head>
<body>
    本服务端口号：[[${port}]]，使用redismq实现websocket集群<br/>
    [[${topic}]] 频道 聊天中。。。<br/>
    <input id="input_id" type="text" /><button onclick="sendMessage()">发送</button>    <button onclick="closeWebsocket()">关闭</button>
    <div id="message_id"></div>
</body>
<script type="text/javascript">
    document.getElementById('input_id').focus();
    var websocket = null;
    //当前浏览前是否支持websocket
    if("WebSocket" in window){
        var url = "ws://127.0.0.1:[[${port}]]/websocket/[[${topic}]]/[[${myname}]]";
        websocket = new WebSocket(url);
    }else{
        alert("浏览器不支持websocket");
    }
    
    websocket.onopen = function(event){
        setMessage("打开连接");
    }
    
    websocket.onclose = function(event){
        setMessage("关闭连接");
    }
    
    websocket.onmessage = function(event){
        setMessage(event.data);
    }
    
    websocket.onerror = function(event){
        setMessage("连接异常");
    }
    
    //监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。
    window.onbeforeunload = function(){
        closeWebsocket();
    }
    
    //关闭websocket
    function closeWebsocket(){
        //3代表已经关闭
        if(3!=websocket.readyState){
            websocket.close();
        }else{
            alert("websocket之前已经关闭");
        }
    }
    
    //将消息显示在网页上
    function setMessage(message){
        document.getElementById('message_id').innerHTML += message + '<br/>';
    }
     
    //发送消息
    function sendMessage(){
        //1代表正在连接
        if(1==websocket.readyState){
            var message = document.getElementById('input_id').value;
            //setMessage(message);
            websocket.send(message);
        }else{
            alert("websocket未连接");
        }
        document.getElementById('input_id').value="";
        document.getElementById('input_id').focus();
    }
</script>
</html>

    8.测试

    　　启动两个服务，端口号分别8081、8082（可以+）

    　　模拟两个端口的地址：

    　　　　http://localhost:8081/websocket/index/like/董志峰

    　　　　http://localhost:8082/websocket/index/like/史振伟

    　　如图

    　　

    源码下载：https://pan.baidu.com/s/1VMQJgXe5vX7uwsyRV57gIw
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  • 原文地址：https://www.cnblogs.com/zwcry/p/9723447.html
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