io.vertx.rabbitmq

Interface RabbitMQConsumer

All Superinterfaces:

ReadStream<RabbitMQMessage>, StreamBase

public interface RabbitMQConsumer
extends ReadStream<RabbitMQMessage>

A stream of messages from a rabbitmq queue.

Method Summary

Modifier and Type	Method and Description
Future<Void>	cancel() Stop message consumption from a queue.
void	cancel(Handler<AsyncResult<Void>> cancelResult) Stop message consumption from a queue.
String	consumerTag()
RabbitMQConsumer	endHandler(Handler<Void> endHandler) Set an end handler.
RabbitMQConsumer	exceptionHandler(Handler<Throwable> exceptionHandler) Set an exception handler on the read stream.
RabbitMQConsumer	fetch(long amount) Fetch the specified amount of elements.
RabbitMQConsumer	handler(Handler<RabbitMQMessage> messageArrived) Set a message handler.
boolean	isCancelled() Return true if cancel() has been called.
boolean	isPaused()
RabbitMQConsumer	pause() Pause the stream of incoming messages from queue.
String	queueName()
RabbitMQConsumer	resume() Resume reading from a queue.
RabbitMQConsumer	setQueueName(String name) Set the name of the queue.

Methods inherited from interface io.vertx.core.streams.ReadStream

collect, pipe, pipeTo, pipeTo

Method Detail

exceptionHandler

RabbitMQConsumer exceptionHandler(Handler<Throwable> exceptionHandler)

Set an exception handler on the read stream.

Specified by:

exceptionHandler in interface ReadStream<RabbitMQMessage>

Specified by:

exceptionHandler in interface StreamBase

Parameters:

exceptionHandler - the exception handler

Returns:

a reference to this, so the API can be used fluently

handler

RabbitMQConsumer handler(Handler<RabbitMQMessage> messageArrived)

Set a message handler. As message appear in a queue, the handler will be called with the message.

Specified by:

handler in interface ReadStream<RabbitMQMessage>

Returns:

a reference to this, so the API can be used fluently

pause

RabbitMQConsumer pause()

Pause the stream of incoming messages from queue.

The messages will continue to arrive, but they will be stored in a internal queue. If the queue size would exceed the limit provided by RabbitMQConsumer#size(int), then incoming messages will be discarded.

Specified by:

pause in interface ReadStream<RabbitMQMessage>

Returns:

a reference to this, so the API can be used fluently

resume

RabbitMQConsumer resume()

Resume reading from a queue. Flushes internal queue.

Specified by:

resume in interface ReadStream<RabbitMQMessage>

Returns:

a reference to this, so the API can be used fluently

endHandler

RabbitMQConsumer endHandler(Handler<Void> endHandler)

Set an end handler. Once the stream has canceled successfully, the handler will be called.

Specified by:

endHandler in interface ReadStream<RabbitMQMessage>

Returns:

a reference to this, so the API can be used fluently

queueName

String queueName()

Returns:

the name of the queue

setQueueName

RabbitMQConsumer setQueueName(String name)

Set the name of the queue. This method is typically only required during a connectionEstablishedCallback when the queue name has changed.

Parameters:

name - the name of the queue

Returns:

a reference to this, so the API can be used fluently

consumerTag

String consumerTag()

Returns:

a consumer tag

cancel

Future<Void> cancel()

Stop message consumption from a queue.

The operation is asynchronous. When consumption is stopped, you can also be notified via endHandler(Handler)

Returns:

a future through which you can find out the operation status.

cancel

void cancel(Handler<AsyncResult<Void>> cancelResult)

Stop message consumption from a queue.

The operation is asynchronous. When consumption is stopped, you can also be notified via endHandler(Handler)

Parameters:

cancelResult - contains information about operation status: success/fail.

isCancelled

boolean isCancelled()

Return true if cancel() has been called.

Returns:

true if cancel() has been called.

isPaused

boolean isPaused()

Returns:

is the stream paused?

fetch

RabbitMQConsumer fetch(long amount)

Fetch the specified amount of elements. If the ReadStream has been paused, reading will recommence with the specified amount of items, otherwise the specified amount will be added to the current stream demand.

Specified by:

fetch in interface ReadStream<RabbitMQMessage>

Returns:

a reference to this, so the API can be used fluently