Queue.DeclareOk queueDeclare(String queue, boolean durable, boolean exclusive, boolean autoDelete,
                                 Map<String, Object> arguments) throws IOException;

void basicQos(int prefetchCount) throws IOException;

String basicConsume(String queue, boolean autoAck, Consumer callback) throws IOException;

 void handleDelivery(String consumerTag,
                        Envelope envelope,
                        AMQP.BasicProperties properties,
                        byte[] body)
        throws IOException;
}

void basicPublish(String exchange, String routingKey, BasicProperties props, byte[] body) throws IOException;

/**
     * Publish a message.
     *
     * Publishing to a non-existent exchange will result in a channel-level
     * protocol exception, which closes the channel.
     *
     * Invocations of <code>Channel#basicPublish</code> will eventually block if a
     * <a >resource-driven alarm</a> is in effect.
     *
     * @see com.rabbitmq.client.AMQP.Basic.Publish
     * @see <a >Resource-driven alarms</a>
     * @param exchange the exchange to publish the message to
     * @param routingKey the routing key
     * @param props other properties for the message - routing headers etc
     * @param body the message body
     * @throws java.io.IOException if an error is encountered
     */
    void basicPublish(String exchange, String routingKey, BasicProperties props, byte[] body) throws IOException;

 void basicAck(long deliveryTag, boolean multiple) throws IOException;

 boolean ack = false ; //打開(kāi)應(yīng)答機(jī)制  
 channel.basicConsume(QUEUE_NAME, ack, consumer);  

 /**
     * Acknowledge one or several received
     * messages. Supply the deliveryTag from the {@link com.rabbitmq.client.AMQP.Basic.GetOk}
     * or {@link com.rabbitmq.client.AMQP.Basic.Deliver} method
     * containing the received message being acknowledged.
     * @see com.rabbitmq.client.AMQP.Basic.Ack
     * @param deliveryTag the tag from the received {@link com.rabbitmq.client.AMQP.Basic.GetOk} or {@link com.rabbitmq.client.AMQP.Basic.Deliver}
     * @param multiple true to acknowledge all messages up to and
     * including the supplied delivery tag; false to acknowledge just
     * the supplied delivery tag.
     * @throws java.io.IOException if an error is encountered
     */
    void basicAck(long deliveryTag, boolean multiple) throws IOException;