java实现RabbitMQ连接池

以下是一个简单的Java实现RabbitMQ连接池的示例代码：

1. 首先，定义一个RabbitMQ连接池类，该类使用Apache Commons Pool实现连接池功能。

public class RabbitMQPool {
    private static final Logger LOGGER = LoggerFactory.getLogger(RabbitMQPool.class);

    private final GenericObjectPool<Connection> pool;

    public RabbitMQPool(ConnectionFactory connectionFactory) {
        pool = new GenericObjectPool<>(new ConnectionFactoryPoolableObjectFactory(connectionFactory));
        pool.setMaxIdle(10);
        pool.setMaxTotal(100);
        pool.setMinIdle(5);
        pool.setTestOnBorrow(true);
    }

    public Connection getConnection() throws Exception {
        LOGGER.debug("Get RabbitMQ Connection from Pool");
        return pool.borrowObject();
    }

    public void releaseConnection(Connection connection) {
        LOGGER.debug("Release RabbitMQ Connection to Pool");
        pool.returnObject(connection);
    }

    public void close() {
        LOGGER.debug("Close RabbitMQ Connection Pool");
        pool.close();
    }

    private static class ConnectionFactoryPoolableObjectFactory extends BasePoolableObjectFactory<Connection> {
        private final ConnectionFactory connectionFactory;

        public ConnectionFactoryPoolableObjectFactory(ConnectionFactory connectionFactory) {
            this.connectionFactory = connectionFactory;
        }

        @Override
        public Connection makeObject() throws Exception {
            LOGGER.debug("Create RabbitMQ Connection");
            return connectionFactory.newConnection();
        }

        @Override
        public void destroyObject(Connection connection) throws Exception {
            LOGGER.debug("Destroy RabbitMQ Connection");
            connection.close();
        }

        @Override
        public boolean validateObject(Connection connection) {
            LOGGER.debug("Validate RabbitMQ Connection");
            return connection.isOpen();
        }
    }
}

2. 在应用程序中使用RabbitMQ连接池获取连接并进行消息传递。

public class RabbitMQClient {
    private static final Logger LOGGER = LoggerFactory.getLogger(RabbitMQClient.class);

    private final RabbitMQPool rabbitMQPool;

    public RabbitMQClient(ConnectionFactory connectionFactory) {
        rabbitMQPool = new RabbitMQPool(connectionFactory);
    }

    public void sendMessage(String message, String queueName) {
        try (Connection connection = rabbitMQPool.getConnection();
             Channel channel = connection.createChannel()) {
            channel.queueDeclare(queueName, false, false, false, null);
            channel.basicPublish("", queueName, null, message.getBytes());
            LOGGER.debug("Sent message '{}' to queue '{}'", message, queueName);
        } catch (Exception e) {
            LOGGER.error("Failed to send message '{}' to queue '{}'", message, queueName, e);
        }
    }

    public void close() {
        rabbitMQPool.close();
    }
}

在上述示例代码中，RabbitMQPool类是一个连接池实现，用于管理RabbitMQ连接。ConnectionFactoryPoolableObjectFactory类是一个ObjectPoolableObjectFactory实现，用于创建和销毁RabbitMQ连接。RabbitMQClient类是一个使用RabbitMQ连接池的客户端实现，用于发送消息到RabbitMQ消息队列。