RabbitMQ学习(四)之路由(java)
2016-07-15 15:33
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转载来自:http://blog.csdn.net/zhu_tianwei/article/details/40887755
使用direct类型实现:消息会被推送至绑定键(binding key)和消息发布附带的选择键(routing key)完全匹配的队列。例如:将不同的日志发送到不同的消费端。
1.发送日志端SendLogDirect.Java
[java]
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package cn.slimsmart.rabbitmq.demo.route;
import java.util.Random;
import java.util.UUID;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
//随机发送6条随机类型(routing key)的日志给转发器~~
public class SendLogDirect {
//交换名称
private static final String EXCHANGE_NAME = "ex_logs_direct";
//日志分类
private static final String[] SEVERITIES = { "info", "warning", "error" };
public static void main(String[] args) throws Exception {
//创建连接和频道
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.101.174");
// 指定用户 密码
factory.setUsername("admin");
factory.setPassword("admin");
// 指定端口
factory.setPort(AMQP.PROTOCOL.PORT);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
// 声明转发器的类型
channel.exchangeDeclare(EXCHANGE_NAME, "direct");
//发送6条消息
for (int i = 0; i < 6; i++)
{
String severity = getSeverity();
String message = severity + "_log :" + UUID.randomUUID().toString();
// 发布消息至转发器,指定routingkey
channel.basicPublish(EXCHANGE_NAME, severity, null, message .getBytes());
System.out.println(" [x] Sent '" + message + "'");
}
channel.close();
connection.close();
}
/**
* 随机产生一种日志类型
*
* @return
*/
private static String getSeverity()
{
Random random = new Random();
int ranVal = random.nextInt(3);
return SEVERITIES[ranVal];
}
}
2.接收日志端ReceiveLogsDirect.java
[java]
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package cn.slimsmart.rabbitmq.demo.route;
import java.util.Random;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.QueueingConsumer;
//接收端随机设置一个日志严重级别(binding_key)。。。
public class ReceiveLogsDirect {
private static final String EXCHANGE_NAME = "ex_logs_direct";
private static final String[] SEVERITIES = { "info", "warning", "error" };
public static void main(String[] args) throws Exception {
// 创建连接和频道
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.101.174");
// 指定用户 密码
factory.setUsername("admin");
factory.setPassword("admin");
// 指定端口
factory.setPort(AMQP.PROTOCOL.PORT);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
// 声明direct类型转发器
channel.exchangeDeclare(EXCHANGE_NAME, "direct");
String queueName = channel.queueDeclare().getQueue();
String severity = getSeverity();
// 指定binding_key
channel.queueBind(queueName, EXCHANGE_NAME, severity);
System.out.println(" [*] Waiting for "+severity+" logs. To exit press CTRL+C");
QueueingConsumer consumer = new QueueingConsumer(channel);
channel.basicConsume(queueName, true, consumer);
while (true)
{
QueueingConsumer.Delivery delivery = consumer.nextDelivery();
String message = new String(delivery.getBody());
System.out.println(" [x] Received '" + message + "'");
}
}
/**
* 随机产生一种日志类型
*
* @return
*/
private static String getSeverity()
{
Random random = new Random();
int ranVal = random.nextInt(3);
return SEVERITIES[ranVal];
}
}
启动几个接收端服务,再启动发送端,接收端对应绑定的键收到对应的消息。注:发送消息时可以设置routing_key,接收队列与转发器间可以设置binding_key,接收者接收与binding_key与routing_key相同的消息。
使用direct类型实现:消息会被推送至绑定键(binding key)和消息发布附带的选择键(routing key)完全匹配的队列。例如:将不同的日志发送到不同的消费端。
1.发送日志端SendLogDirect.Java
[java]
view plain
copy
print?
package cn.slimsmart.rabbitmq.demo.route;
import java.util.Random;
import java.util.UUID;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
//随机发送6条随机类型(routing key)的日志给转发器~~
public class SendLogDirect {
//交换名称
private static final String EXCHANGE_NAME = "ex_logs_direct";
//日志分类
private static final String[] SEVERITIES = { "info", "warning", "error" };
public static void main(String[] args) throws Exception {
//创建连接和频道
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.101.174");
// 指定用户 密码
factory.setUsername("admin");
factory.setPassword("admin");
// 指定端口
factory.setPort(AMQP.PROTOCOL.PORT);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
// 声明转发器的类型
channel.exchangeDeclare(EXCHANGE_NAME, "direct");
//发送6条消息
for (int i = 0; i < 6; i++)
{
String severity = getSeverity();
String message = severity + "_log :" + UUID.randomUUID().toString();
// 发布消息至转发器,指定routingkey
channel.basicPublish(EXCHANGE_NAME, severity, null, message .getBytes());
System.out.println(" [x] Sent '" + message + "'");
}
channel.close();
connection.close();
}
/**
* 随机产生一种日志类型
*
* @return
*/
private static String getSeverity()
{
Random random = new Random();
int ranVal = random.nextInt(3);
return SEVERITIES[ranVal];
}
}
2.接收日志端ReceiveLogsDirect.java
[java]
view plain
copy
print?
package cn.slimsmart.rabbitmq.demo.route;
import java.util.Random;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.QueueingConsumer;
//接收端随机设置一个日志严重级别(binding_key)。。。
public class ReceiveLogsDirect {
private static final String EXCHANGE_NAME = "ex_logs_direct";
private static final String[] SEVERITIES = { "info", "warning", "error" };
public static void main(String[] args) throws Exception {
// 创建连接和频道
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.101.174");
// 指定用户 密码
factory.setUsername("admin");
factory.setPassword("admin");
// 指定端口
factory.setPort(AMQP.PROTOCOL.PORT);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
// 声明direct类型转发器
channel.exchangeDeclare(EXCHANGE_NAME, "direct");
String queueName = channel.queueDeclare().getQueue();
String severity = getSeverity();
// 指定binding_key
channel.queueBind(queueName, EXCHANGE_NAME, severity);
System.out.println(" [*] Waiting for "+severity+" logs. To exit press CTRL+C");
QueueingConsumer consumer = new QueueingConsumer(channel);
channel.basicConsume(queueName, true, consumer);
while (true)
{
QueueingConsumer.Delivery delivery = consumer.nextDelivery();
String message = new String(delivery.getBody());
System.out.println(" [x] Received '" + message + "'");
}
}
/**
* 随机产生一种日志类型
*
* @return
*/
private static String getSeverity()
{
Random random = new Random();
int ranVal = random.nextInt(3);
return SEVERITIES[ranVal];
}
}
启动几个接收端服务,再启动发送端,接收端对应绑定的键收到对应的消息。注:发送消息时可以设置routing_key,接收队列与转发器间可以设置binding_key,接收者接收与binding_key与routing_key相同的消息。
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