declare namespace com {
    namespace rabbitmq {
        namespace client {
            /**
             * <p>Interface for application callback objects to receive notifications and messages from
             * a queue by subscription.
             * Most implementations will subclass {@link DefaultConsumer}.
             * </p>
             * <p>
             * The methods of this interface are invoked in a dispatch
             * thread which is separate from the {@link Connection}'s thread. This
             * allows {@link Consumer}s to call {@link Channel} or {@link
             * Connection} methods without causing a deadlock.
             * </p>
             * The {@link Consumer}s on a particular {@link Channel} are invoked serially on one or more
             * dispatch threads. {@link Consumer}s should avoid executing long-running code
             * because this will delay dispatch of messages to other {@link Consumer}s on the same
             * {@link Channel}.
             * For a lambda-oriented syntax, use {@link DeliverCallback},
             * {@link CancelCallback}, and {@link ConsumerShutdownSignalCallback}.
             * @see Channel#basicConsume(String, boolean, String, boolean, boolean, java.util.Map, Consumer)
             * @see Channel#basicCancel
             */
            // @ts-ignore
            interface Consumer {
                /**
                 * Called when the consumer is registered by a call to any of the
                 * {@link Channel#basicConsume} methods.
                 * @param consumerTag the <i>consumer tag</i> associated with the consumer
                 */
                // @ts-ignore
                handleConsumeOk(consumerTag: java.lang.String | string): void
                /**
                 * Called when the consumer is cancelled by a call to {@link Channel#basicCancel}.
                 * @param consumerTag the <i>consumer tag</i> associated with the consumer
                 */
                // @ts-ignore
                handleCancelOk(consumerTag: java.lang.String | string): void
                /**
                 * Called when the consumer is cancelled for reasons <i>other than</i> by a call to
                 * {@link Channel#basicCancel}. For example, the queue has been deleted.
                 * See {@link #handleCancelOk} for notification of consumer
                 * cancellation due to {@link Channel#basicCancel}.
                 * @param consumerTag the <i>consumer tag</i> associated with the consumer
                 * @throws IOException
                 */
                // @ts-ignore
                handleCancel(consumerTag: java.lang.String | string): void
                /**
                 * Called when either the channel or the underlying connection has been shut down.
                 * @param consumerTag the <i>consumer tag</i> associated with the consumer
                 * @param sig a {#link ShutdownSignalException} indicating the reason for the shut down
                 */
                // @ts-ignore
                handleShutdownSignal(consumerTag: java.lang.String | string, sig: com.rabbitmq.client.ShutdownSignalException): void
                /**
                 * Called when a <code><b>basic.recover-ok</b></code> is received
                 * in reply to a <code><b>basic.recover</b></code>. All messages
                 * received before this is invoked that haven't been <i>ack</i>'ed will be
                 * re-delivered. All messages received afterwards won't be.
                 * @param consumerTag the <i>consumer tag</i> associated with the consumer
                 */
                // @ts-ignore
                handleRecoverOk(consumerTag: java.lang.String | string): void
                /**
                 * Called when a <code><b>basic.deliver</b></code> is received for this consumer.
                 * @param consumerTag the <i>consumer tag</i> associated with the consumer
                 * @param envelope packaging data for the message
                 * @param properties content header data for the message
                 * @param body the message body (opaque, client-specific byte array)
                 * @throws IOException if the consumer encounters an I/O error while processing the message
                 * @see Envelope
                 */
                // @ts-ignore
                handleDelivery(consumerTag: java.lang.String | string, envelope: com.rabbitmq.client.Envelope, properties: com.rabbitmq.client.AMQP.BasicProperties, body: number /*byte*/[]): void
            }
        }
    }
}