帮我写一个基于mq的批量和全量同步用户表的java代码
时间: 2024-05-03 11:23:24 浏览: 10
以下是一个基于MQ的批量和全量同步用户表的Java代码示例:
```java
import com.rabbitmq.client.*;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class UserSync {
private static final String QUEUE_NAME = "user_sync_queue";
private static final String EXCHANGE_NAME = "user_sync_exchange";
private static final String ROUTING_KEY = "user.sync";
public static void main(String[] args) throws IOException, TimeoutException {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "direct");
channel.queueDeclare(QUEUE_NAME, true, false, false, null);
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, ROUTING_KEY);
// 批量同步
String batchSyncMessage = "batch_sync_users";
channel.basicPublish(EXCHANGE_NAME, ROUTING_KEY, null, batchSyncMessage.getBytes());
// 全量同步
String fullSyncMessage = "full_sync_users";
channel.basicPublish(EXCHANGE_NAME, ROUTING_KEY, null, fullSyncMessage.getBytes());
channel.close();
connection.close();
}
}
```
以上代码中,我们首先建立了一个MQ连接,然后声明了一个名为`user_sync_queue`的队列和一个名为`user_sync_exchange`的交换机,并将队列绑定到交换机上,使用`ROUTING_KEY`指定路由键。
接下来,我们使用`basicPublish()`方法向交换机发送了两个消息,分别表示批量同步和全量同步用户表。
如果我们希望在接收到这些消息时执行相应的操作,我们需要编写一个消息接收者来处理这些消息。以下是一个简单的消息接收者示例:
```java
import com.rabbitmq.client.*;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class UserSyncReceiver {
private static final String QUEUE_NAME = "user_sync_queue";
private static final String EXCHANGE_NAME = "user_sync_exchange";
private static final String ROUTING_KEY = "user.sync";
public static void main(String[] args) throws IOException, TimeoutException {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "direct");
channel.queueDeclare(QUEUE_NAME, true, false, false, null);
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, ROUTING_KEY);
Consumer consumer = new DefaultConsumer(channel) {
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String message = new String(body, "UTF-8");
if (message.equals("batch_sync_users")) {
// 执行批量同步操作
System.out.println("Batch sync users.");
} else if (message.equals("full_sync_users")) {
// 执行全量同步操作
System.out.println("Full sync users.");
}
}
};
channel.basicConsume(QUEUE_NAME, true, consumer);
}
}
```
以上代码中,我们同样建立了一个MQ连接,并声明了队列和交换机。然后,我们创建了一个`Consumer`对象,并实现了`handleDelivery()`方法来处理接收到的消息。如果消息内容为`batch_sync_users`,则执行批量同步操作;如果消息内容为`full_sync_users`,则执行全量同步操作。
最后,我们使用`basicConsume()`方法来注册这个消费者,并开始监听队列中的消息。当有消息到达时,我们的消费者会自动调用`handleDelivery()`方法来处理消息。