1.erlang下载地址
http://www.erlang.org/downloads
打开网址后,如果是win10是64位的,则选择64位的版本,下载后的文件名如下:
otp_win64_20.3.exe
双击exe文件,注意最好不要使用默认安装路径,因为默认路径包含Program Files目录,带了空格。最好自己指定一个安装目录。
配置环境变量
配置ERLANG_HOME环境变量,其值指向erlang的安装目录。另外将 %ERLANG_HOME%\bin; 加入到Path中。
启动cmd命令行,输入erl,如果出现erlang的版本信息就表示erlang语言环境安装成功。
Eshell V9.
2.下载rabbitMQ
下载地址
打开这个网站,直接下载
rabbitmq-server-3.7.4.exe
安装rabbitmq
双击rabbitmq-server-3.7.4.exe,注意自己指定一个安装目录,默认的安装目录包含Program Files目录,Program Files是带空格的。接下来就一路next即可。
安装管理界面
到rabbitmq的安装目录下,找到sbin目录,启动window cmd命令,cd到sbin目录下,直接执行
rabbitmq-plugins enable rabbitmq_management
如果执行成功,会出现如下信息:
The following plugins have been configured:
rabbitmq_management
rabbitmq_management_agentrabbitmq_web_dispatch
继续执行这个命令 rabbitmqctl.bat status
如果报错
C:\RabbitMQ Server\rabbitmq_server-3.7.3\sbin>rabbitmqctl.bat status Status of node rabbit@DESKTOP-6JT7D2H ... Error: unable to perform an operation on node 'rabbit@DESKTOP-6JT7D2H'. Please see diagnostics information and suggestions below. Most common reasons for this are: * Target node is unreachable (e.g. due to hostname resolution, TCP connection or firewall issues) * CLI tool fails to authenticate with the server (e.g. due to CLI tool's Erlang cookie not matching that of the server) * Target node is not running In addition to the diagnostics info below: * See the CLI, clustering and networking guides on http://rabbitmq.com/documentation.html to learn more * Consult server logs on node rabbit@DESKTOP-6JT7D2H DIAGNOSTICS =========== attempted to contact: ['rabbit@DESKTOP-6JT7D2H'] rabbit@DESKTOP-6JT7D2H: * connected to epmd (port 4369) on DESKTOP-6JT7D2H * epmd reports node 'rabbit' uses port 25672 for inter-node and CLI tool traffic * TCP connection succeeded but Erlang distribution failed * Authentication failed (rejected by the remote node), please check the Erlang cookie Current node details: * node name: 'rabbitmqcli57@DESKTOP-6JT7D2H' * effective user's home directory: C:\Users\Administrator.DESKTOP-6JT7D2H * Erlang cookie hash: RmzKErjVZUcsMU8wSgBGbA== 解决方法: 将C:\Users\用户名\.erlang.cookie 文件拷贝到C:\Windows\System32\config\systemprofile替换掉.erlang.cookie文件 重启rabbitMQ服务
当安装完插件后,必须重启rabbitmq。最笨的办法就是直接使用services.msc,在服务中找到RabbitMQ服务,直接【重新启动】即可。
重启成功后,直接输入:
并使用
用户名:guest
密码:guest
登录进入即可。
查看用户及用户角色:rabbitmqctl.bat list_users
C:\RabbitMQ Server\rabbitmq_server-3.7.3\sbin>rabbitmqctl.bat list_users Listing users ... guest [administrator]
新增用户:rabbitmqctl.bat add_user username password
C:\RabbitMQ Server\rabbitmq_server-3.7.3\sbin>rabbitmqctl.bat add_user admin 123456 Adding user "admin" ... C:\RabbitMQ Server\rabbitmq_server-3.7.3\sbin>rabbitmqctl.bat list_users Listing users ... admin [] guest [administrator]
用户角色:
rabbitmq用户角色可分为五类:超级管理员, 监控者, 策略制定者, 普通管理者以及其他。
(1) 超级管理员(administrator)
可登陆管理控制台(启用management plugin的情况下),可查看所有的信息,并且可以对用户,策略(policy)进行操作。
(2) 监控者(monitoring)
可登陆管理控制台(启用management plugin的情况下),同时可以查看rabbitmq节点的相关信息(进程数,内存使用情况,磁盘使用情况等)
(3) 策略制定者(policymaker)
可登陆管理控制台(启用management plugin的情况下), 同时可以对policy进行管理。
(4) 普通管理者(management)
仅可登陆管理控制台(启用management plugin的情况下),无法看到节点信息,也无法对策略进行管理。
(5) 其他的
无法登陆管理控制台,通常就是普通的生产者和消费者。
授权用户为超级管理员:rabbitmqctl.bat set_user_tags admin administrator
C:\RabbitMQ Server\rabbitmq_server-3.7.3\sbin>rabbitmqctl.bat set_user_tags admin administrator Setting tags for user "admin" to [administrator] ... C:\RabbitMQ Server\rabbitmq_server-3.7.3\sbin>rabbitmqctl.bat list_users Listing users ... admin [administrator] guest [administrator]
用户可以设置多个角色:rabbitmqctl.bat set_user_tags username tag1 tag2 ...
修改用户密码:rabbitmqctl change_password userName newPassword
C:\RabbitMQ Server\rabbitmq_server-3.7.3\sbin>rabbitmqctl.bat change_password admin 888888 Changing password for user "admin" ...
删掉用户:rabbitmqctl.bat delete_user username
C:\RabbitMQ Server\rabbitmq_server-3.7.3\sbin>rabbitmqctl.bat delete_user guest Deleting user "guest" ... C:\RabbitMQ Server\rabbitmq_server-3.7.3\sbin>rabbitmqctl.bat list_users Listing users ... admin [administrator]
权限相关命令为:
(1) 设置用户权限
rabbitmqctl set_permissions -p VHostPath User ConfP WriteP ReadP
(2) 查看(指定hostpath)所有用户的权限信息
rabbitmqctl list_permissions [-p VHostPath]
(3) 查看指定用户的权限信息
rabbitmqctl list_user_permissions User
(4) 清除用户的权限信息
rabbitmqctl clear_permissions [-p VHostPath] User
rabbitmq_delayed_message_exchange插件
插件下载地址:
打开网址后,ctrl + f,搜索rabbitmq_delayed_message_exchange
。
千万记住,一定选好版本号,由于我使用的是RabbitMQ 3.7.4,因此对应的rabbitmq_delayed_message_exchange
插件也必须选择3.7.x的。
如果没有选对版本,在使用延迟消息的时候,会遇到各种各样的奇葩问题,而且网上还找不到解决方案。我因为这个问题,折腾了整整一个晚上。请牢记,要选对插件版本。
下载完插件后,将其放置到RabbitMQ安装目录下的plugins
目录下,并使用如下命令启动这个插件:
需要到rabbitmq的安装目录下,找到sbin目录,启动window cmd命令,cd到sbin目录下,直接执行下面命令
rabbitmq-plugins enable rabbitmq_delayed_message_exchange
如果启动成功会出现如下信息:
The following plugins have been enabled:
rabbitmq_delayed_message_exchange
启动插件成功后,记得重启一下RabbitMQ,让其生效。
集成RabbitMQ
这个就非常简单了,直接在maven工程的pom.xml文件中加入
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
Spring Boot的版本我使用的是2.0.1.RELEASE
.
接下来在application.properties
文件中加入redis配置:
spring.rabbitmq.host=127.0.0.1
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
定义ConnectionFactory和RabbitTemplate
也很简单,代码如下:
package com.mq.rabbitmq;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@ConfigurationProperties(prefix = "spring.rabbitmq")
public class RabbitMqConfig {
private String host;
private int port;
private String userName;
private String password;
@Bean
public ConnectionFactory connectionFactory() {
CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory(host,port);
cachingConnectionFactory.setUsername(userName);
cachingConnectionFactory.setPassword(password);
cachingConnectionFactory.setVirtualHost("/");
cachingConnectionFactory.setPublisherConfirms(true);
return cachingConnectionFactory;
}
@Bean
public RabbitTemplate rabbitTemplate() {
RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory());
return rabbitTemplate;
}
public String getHost() {
return host;
}
public void setHost(String host) {
this.host = host;
}
public int getPort() {
return port;
}
public void setPort(int port) {
this.port = port;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
Exchange和Queue配置
package com.mq.rabbitmq;
import org.springframework.amqp.core.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.HashMap;
import java.util.Map;
@Configuration
public class QueueConfig {
@Bean
public CustomExchange delayExchange() {
Map<String, Object> args = new HashMap<>();
args.put("x-delayed-type", "direct");
return new CustomExchange("test_exchange", "x-delayed-message",true, false,args);
}
@Bean
public Queue queue() {
Queue queue = new Queue("test_queue_1", true);
return queue;
}
@Bean
public Binding binding() {
return BindingBuilder.bind(queue()).to(delayExchange()).with("test_queue_1").noargs();
}
}
这里要特别注意的是,使用的是CustomExchange
,不是DirectExchange
,另外CustomExchange
的类型必须是x-delayed-message
。
实现消息发送
package com.mq.rabbitmq;
import org.springframework.amqp.AmqpException;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessagePostProcessor;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.text.SimpleDateFormat;
import java.util.Date;
@Service
public class MessageServiceImpl {
@Autowired
private RabbitTemplate rabbitTemplate;
public void sendMsg(String queueName,String msg) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("消息发送时间:"+sdf.format(new Date()));
rabbitTemplate.convertAndSend("test_exchange", queueName, msg, new MessagePostProcessor() {
@Override
public Message postProcessMessage(Message message) throws AmqpException {
message.getMessageProperties().setHeader("x-delay",3000);
return message;
}
});
}
}
注意在发送的时候,必须加上一个header
x-delay
在这里我设置的延迟时间是3秒。
消息消费者
package com.mq.rabbitmq;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
import java.text.SimpleDateFormat;
import java.util.Date;
@Component
public class MessageReceiver {
@RabbitListener(queues = "test_queue_1")
public void receive(String msg) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("消息接收时间:"+sdf.format(new Date()));
System.out.println("接收到的消息:"+msg);
}
}
运行Spring Boot程序和发送消息
直接在main方法里运行Spring Boot程序,Spring Boot会自动解析MessageReceiver
类的。
接下来只需要用Junit运行一下发送消息的接口即可。
package com.mq.rabbitmq;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class RabbitmqApplicationTests {
@Autowired
private MessageServiceImpl messageService;
@Test
public void send() {
messageService.sendMsg("test_queue_1","hello i am delay msg");
}
}
运行完后,可以看到如下信息:
消息发送时间:2018-05-03 12:44:53
3秒钟后,Spring Boot控制台会输出:
消息接收时间:2018-05-03 12:44:56
接收到的消息:hello i am delay msg