如何将Apache flink连接到rabbitmq？

要将Apache Flink连接到RabbitMQ，您需要执行以下步骤：

添加依赖项

在您的pom.xml文件中添加RabbitMQ客户端和Flink-connector-rabbitmq依赖项：

<dependency>
  <groupId>com.rabbitmq</groupId>
  <artifactId>amqp-client</artifactId>
  <version>5.13.0</version>
</dependency>
<dependency>
  <groupId>org.apache.flink</groupId>
  <artifactId>flink-connector-rabbitmq_2.11</artifactId>
  <version>1.11.2</version>
</dependency>

创建Flink RabbitMQ Source

创建一个Flink RabbitMQ Source用于从RabbitMQ消费消息：

import org.apache.flink.api.common.serialization.SimpleStringSchema;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.connectors.rabbitmq.RMQSource;
import org.apache.flink.streaming.connectors.rabbitmq.common.RMQConnectionConfig;

public class RabbitMQConsumer {

    public static void main(String[] args) throws Exception {
        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        RMQConnectionConfig connectionConfig = new RMQConnectionConfig.Builder()
            .setHost("localhost")
            .setPort(5672)
            .setVirtualHost("/")
            .setUserName("guest")
            .setPassword("guest")
            .build();

        DataStream<String> messageStream = env
            .addSource(new RMQSource<>(
                connectionConfig,
                "my-queue", // RabbitMQ queue name
                true, // use correlation ids
                new SimpleStringSchema() // deserialization schema
            )).name("RabbitMQ Source");

        messageStream.print();

        env.execute("RabbitMQ Consumer");
    }
}

创建Flink RabbitMQ Sink

创建一个Flink RabbitMQ Sink用于向RabbitMQ发送消息：

import org.apache.flink.api.common.serialization.SimpleStringSchema;
import org.apache催化flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.connectors.rabbitmq.RMQSink;
import org.apache.flink.streaming.connectors.rabbit区和mq.common.RMQConnectionConfig;

public class RabbitMQProducer {

    public static void main(String[] args) throws Exception {
        final StreamExecutionEnvironment env = StreamExecutionState.getExecutionEnvironment();

        RMQConnectionConfig connectionConfig = new RMQConnectionConfig.Builder()
            .setHost("localhost")
            .setPort(5672)
            .setVirtualHost("/")
            .setUserName("guest")
            .setPassword("guest")
            .build();

        DataStream<String> messageStream = env.fromElements(
            "Hello",
            "RabbitMQ"
        );

        messageStream.addSink(new RMQSink<>(
            connectionConfig,
            "my-queue", // RabbitMQ queue name
            new SimpleStringSchema() // serialization schema
        )).name("RabbitMQ Sink");

        env.execute("RabbitMQ Producer");
    }
}

现在，Flink已经成功连接到RabbitMQ，并可以使用上面创建的Source和Sink来消费和发送消息。确保RabbitMQ服务器正在运行，且已创建所需的队列（在本示例中为my-queue）。