RabbitMQ是一个开源的消息队列中间件,用于在分布式系统中进行消息传递。在RabbitMQ中,DefaultConsumer是一个用于消费消息的基本消费者类。设置DefaultConsumer的超时时间可以通过以下步骤实现:
下面是一个示例代码,展示如何设置DefaultConsumer的超时时间:
import com.rabbitmq.client.*;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class RabbitMQConsumer {
private static final String QUEUE_NAME = "my_queue";
private static final String HOST = "localhost";
private static final int PORT = 5672;
private static final String USERNAME = "guest";
private static final String PASSWORD = "guest";
public static void main(String[] args) throws IOException, TimeoutException {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost(HOST);
factory.setPort(PORT);
factory.setUsername(USERNAME);
factory.setPassword(PASSWORD);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
DefaultConsumer consumer = new DefaultConsumer(channel) {
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
// 处理接收到的消息
String message = new String(body, "UTF-8");
System.out.println("Received message: " + message);
}
};
// 设置超时时间为10秒
channel.basicConsume(QUEUE_NAME, false, consumer, new ConsumerShutdownSignalCallback() {
@Override
public void handleShutdownSignal(String consumerTag, ShutdownSignalException sig) {
// 处理消费者关闭的逻辑
System.out.println("Consumer shutdown");
}
});
// 等待消息的处理
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}
channel.close();
connection.close();
}
}
在上述示例代码中,我们创建了一个DefaultConsumer对象,并重写了handleDelivery方法来处理接收到的消息。然后,使用basicConsume方法设置了消费者的超时时间为10秒,并传入了一个ConsumerShutdownSignalCallback对象来处理消费者关闭的逻辑。最后,通过调用Thread.sleep方法等待消息的处理,超过超时时间后,消费者会被关闭。
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