public class QueueingBasicConsumer

extends DefaultBasicConsumer

Summary

Simple IBasicConsumer implementation that uses a SharedQueue to buffer incoming deliveries.

Remarks

Received messages are placed in the SharedQueue as instances of BasicDeliverEventArgs.

Note that messages taken from the SharedQueue may need acknowledging with IModel.BasicAck.

When the consumer is closed, through BasicCancel or through the shutdown of the underlying IModel or IConnection, the SharedQueue's Close() method is called, which causes any Enqueue() operations, and Dequeue() operations when the queue is empty, to throw EndOfStreamException (see the comment for SharedQueue.Close()).

The following is a simple example of the usage of this class:

            	IModel channel = ...;
            	QueueingBasicConsumer consumer = new QueueingBasicConsumer(channel);
            	channel.BasicConsume(queueName, null, consumer);
            	
            	// At this point, messages will be being asynchronously delivered,
            	// and will be queueing up in consumer.Queue.
            	
            	while (true) {
            	    try {
            	        BasicDeliverEventArgs e = (BasicDeliverEventArgs) consumer.Queue.Dequeue();
            	        // ... handle the delivery ...
            	        channel.BasicAck(e.DeliveryTag, false);
            	    } catch (EndOfStreamException ex) {
            	        // The consumer was cancelled, the model closed, or the
            	        // connection went away.
            	        break;
            	    }
            	}

Property Summary

Flags	Type	Name	Summary
public	`SharedQueue`	`Queue` (r)	Retrieves the SharedQueue that messages arrive on.

Constructor Summary

Flags	Name	Summary
public	`QueueingBasicConsumer(IModel model, SharedQueue queue)`	Creates a fresh QueueingBasicConsumer, initialising the Model and Queue properties to the given values.
public	`QueueingBasicConsumer(IModel model)`	Creates a fresh QueueingBasicConsumer, with Model set to the argument, and Queue set to a fresh SharedQueue.
public	`QueueingBasicConsumer()`	Creates a fresh QueueingBasicConsumer, initialising the Model property to null and the Queue property to a fresh SharedQueue.

Method Summary

Flags	Name	Summary
public virtual	`void HandleBasicDeliver(string consumerTag, ulong deliveryTag, bool redelivered, string exchange, string routingKey, IBasicProperties properties, byte[] body)`	Overrides DefaultBasicConsumer's HandleBasicDeliver implementation, building a BasicDeliverEventArgs instance and placing it in the Queue.
public virtual	`void OnCancel()`	Overrides DefaultBasicConsumer's OnCancel implementation, extending it to call the Close() method of the SharedQueue.

Property Detail

public SharedQueue Queue (r)

Summary

Retrieves the SharedQueue that messages arrive on.

Constructor Detail

QueueingBasicConsumer

public QueueingBasicConsumer(IModel model, SharedQueue queue)

Parameters

Name	Type
model	`IModel`
queue	`SharedQueue`

Summary

Creates a fresh QueueingBasicConsumer, initialising the Model and Queue properties to the given values.

QueueingBasicConsumer

public QueueingBasicConsumer(IModel model)

Parameters

Name	Type
model	`IModel`

Summary

Creates a fresh QueueingBasicConsumer, with Model set to the argument, and Queue set to a fresh SharedQueue.

QueueingBasicConsumer

public QueueingBasicConsumer()

Summary

Creates a fresh QueueingBasicConsumer, initialising the Model property to null and the Queue property to a fresh SharedQueue.

Method Detail

HandleBasicDeliver

public virtual void HandleBasicDeliver(string consumerTag, ulong deliveryTag, bool redelivered, string exchange, string routingKey, IBasicProperties properties, byte[] body)

Flags public virtual

Return type void

Parameters

Name	Type
consumerTag	`string`
deliveryTag	`ulong`
redelivered	`bool`
exchange	`string`
routingKey	`string`
properties	`IBasicProperties`
body	`byte[]`

Summary

Overrides DefaultBasicConsumer's HandleBasicDeliver implementation, building a BasicDeliverEventArgs instance and placing it in the Queue.

OnCancel

public virtual void OnCancel()

Flags	public virtual
Return type	`void`

Summary

Overrides DefaultBasicConsumer's OnCancel implementation, extending it to call the Close() method of the SharedQueue.