import com.rabbitmq.client.*;
import java.io.IOException;
/**
* 通过信道 Channel 的 basicPublish() 方法发送消息，
* 发送消息时指定 userId
* @author Administrator
* @date 2022年2月17日13:59:29
*/
public class PushMessage3 {
private static final String EXCHANGE_NAME = "exchange_" +
PushMessage3.class.getSimpleName();
/**
* 发送消息
*/
private void sender() {
Connection connection = null;
try {
// 创建连接
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("127.0.0.1");
factory.setPort(5672);
factory.setUsername("guest");
factory.setPassword("guest");
connection = factory.newConnection();
// 创建通道
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "topic");
// 发送消息
// 发送消息时指定 userId，只有当前连接的用户名等于 userId 才可以发送出去消息
System.out.println("[Send] Sending Message...");
byte[] msg = "hello wrold".getBytes();
channel.basicPublish(EXCHANGE_NAME, "www.hxstrive.com",
new AMQP.BasicProperties.Builder()
.contentType("text/plain")
.deliveryMode(2)
.priority(1)
// 将 userId 设置为 hxstrive，则不能发送消息，因为与创建连接指定的用户 guest 不一致
// 将 userId 设置为 guest，能正常发送消息，因为与创建连接指定的用户一致
.userId("guest")
.build(), msg);
} catch(Exception e) {
e.printStackTrace();
} finally {
if ( connection != null ) {
try {
connection.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* 消费消息
*/
private void consumer() {
try {
// 创建连接
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("127.0.0.1");
factory.setPort(5672);
factory.setUsername("guest");
factory.setPassword("guest");
Connection connection = factory.newConnection();
// 创建通道
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "topic");
// 绑定exchange与queue
String queueName = channel.queueDeclare().getQueue();
channel.queueBind(queueName, EXCHANGE_NAME, "*.hxstrive.com");
System.out.println("[Receive1] Waiting Message...");
// 消费消息
channel.basicConsume(queueName, true, new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope,
AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("[Receive1] Receive Message :: " + new String(body));
}
});
} catch(Exception e) {
e.printStackTrace();
}
}
/**
* 消费消息
*/
private void consumer2() {
try {
// 创建连接
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("127.0.0.1");
factory.setPort(5672);
factory.setUsername("hxstrive");
factory.setPassword("hxstrive");
Connection connection = factory.newConnection();
// 创建通道
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "topic");
// 绑定exchange与queue
String queueName = channel.queueDeclare().getQueue();
channel.queueBind(queueName, EXCHANGE_NAME, "*.hxstrive.com");
System.out.println("[Receive2] Waiting Message...");
// 消费消息
channel.basicConsume(queueName, true, new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope,
AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("[Receive2] Receive Message :: " + new String(body));
}
});
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
PushMessage3 demo = new PushMessage3();
demo.consumer();
demo.consumer2();
demo.sender();
}
}
