io.vertx.rabbitmq

Interface RabbitMQPublisher

public interface RabbitMQPublisher

A reliable publisher that

• Queues up messages internally until it can successfully call basicPublish.
• Notifies the caller using a robust ID (not delivery tag) when the message is confirmed by rabbit.

This is a layer above the RabbitMQClient that provides a lot of standard implementation when guaranteed at least once delivery is required. If confirmations are not required do not use this publisher as it does have overhead.

Author:

jtalbut

Method Summary

Modifier and Type	Method and Description
static RabbitMQPublisher	create(Vertx vertx, RabbitMQClient client, RabbitMQPublisherOptions options) Create and return a publisher using the specified client.
ReadStream<RabbitMQPublisherConfirmation>	getConfirmationStream() Get the ReadStream that contains the message IDs for confirmed messages.
Future<Void>	publish(String exchange, String routingKey, com.rabbitmq.client.BasicProperties properties, Buffer body) Like #basicPublish(String, String, BasicProperties, Buffer, Handler) but returns a Future of the asynchronous result
void	publish(String exchange, String routingKey, com.rabbitmq.client.BasicProperties properties, Buffer body, Handler<AsyncResult<Void>> resultHandler) Publish a message.
int	queueSize() Get the number of published, but not sent, messages.
void	restart() Undo the effects of calling stop(Handler) so that publish may be called again.
Future<Void>	start() Like start(Handler) but returns a Future of the asynchronous result
void	start(Handler<AsyncResult<Void>> resultHandler) Start the rabbitMQ publisher.
Future<Void>	stop() Like stop(Handler) but returns a Future of the asynchronous result
void	stop(Handler<AsyncResult<Void>> resultHandler) Stop the rabbitMQ publisher.

Method Detail

create

static RabbitMQPublisher create(Vertx vertx,
                                RabbitMQClient client,
                                RabbitMQPublisherOptions options)

Create and return a publisher using the specified client.

Parameters:

vertx - the vertx instance.

client - the RabbitMQClient.

options - options for the publisher.

Returns:

the publisher

start

void start(Handler<AsyncResult<Void>> resultHandler)

Start the rabbitMQ publisher. The RabbitMQClient should have been started before this.

start

Future<Void> start()

Like start(Handler) but returns a Future of the asynchronous result

stop

void stop(Handler<AsyncResult<Void>> resultHandler)

Stop the rabbitMQ publisher. Calling this is optional, but it gives the opportunity to drain the send queue without losing messages. Future calls to publish will be ignored.

stop

Future<Void> stop()

Like stop(Handler) but returns a Future of the asynchronous result

restart

void restart()

Undo the effects of calling stop(Handler) so that publish may be called again. It is harmless to call restart() when stop(Handler) has not been called, however if restart() is called whilst stop(Handler) is being processed the stop(Handler) will never complete.

getConfirmationStream

ReadStream<RabbitMQPublisherConfirmation> getConfirmationStream()

Get the ReadStream that contains the message IDs for confirmed messages. The message IDs in this ReadStream are taken from the message properties, if these message IDs are not set then this ReadStream will contain nulls and using this publisher will be pointless.

Returns:

the ReadStream that contains the message IDs for confirmed messages.

publish

void publish(String exchange,
             String routingKey,
             com.rabbitmq.client.BasicProperties properties,
             Buffer body,
             Handler<AsyncResult<Void>> resultHandler)

Publish a message.

See Also:

Channel.basicPublish(String, String, AMQP.BasicProperties, byte[])

publish

Future<Void> publish(String exchange,
                     String routingKey,
                     com.rabbitmq.client.BasicProperties properties,
                     Buffer body)

Like #basicPublish(String, String, BasicProperties, Buffer, Handler) but returns a Future of the asynchronous result

queueSize

int queueSize()

Get the number of published, but not sent, messages.

Returns:

the number of published, but not sent, messages.