com.rabbitmq.stream

Class ConsumerFlowStrategy.MessageCountConsumerFlowStrategy

java.lang.Object

com.rabbitmq.stream.ConsumerFlowStrategy.MessageCountConsumerFlowStrategy

All Implemented Interfaces:

ConsumerFlowStrategy

Enclosing interface:

ConsumerFlowStrategy

public static class ConsumerFlowStrategy.MessageCountConsumerFlowStrategy
extends Object
implements ConsumerFlowStrategy

Strategy that provides the specified number of initial credits and a credit when the specified ratio of the chunk messages are processed.

Make sure to call MessageHandler.Context.processed() on every message when using this strategy, otherwise the broker may stop sending messages to the consumer.

Nested Class Summary

Nested classes/interfaces inherited from interface com.rabbitmq.stream.ConsumerFlowStrategy

ConsumerFlowStrategy.Context, ConsumerFlowStrategy.CreditOnChunkArrivalConsumerFlowStrategy, ConsumerFlowStrategy.MessageCountConsumerFlowStrategy, ConsumerFlowStrategy.MessageProcessedCallback

Method Summary

Modifier and Type	Method and Description
int	initialCredits() The initial number of credits for a subscription.
ConsumerFlowStrategy.MessageProcessedCallback	start(ConsumerFlowStrategy.Context context) Return the behavior for MessageHandler.Context.processed() calls.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.rabbitmq.stream.ConsumerFlowStrategy

creditOnChunkArrival, creditOnChunkArrival, creditOnProcessedMessageCount, creditWhenHalfMessagesProcessed, creditWhenHalfMessagesProcessed

Method Detail

initialCredits

public int initialCredits()

Description copied from interface: ConsumerFlowStrategy

The initial number of credits for a subscription.

It must be greater than 0. Values are usually between 1 and 10.

Specified by:

initialCredits in interface ConsumerFlowStrategy

Returns:

initial number of credits

start

public ConsumerFlowStrategy.MessageProcessedCallback start(ConsumerFlowStrategy.Context context)

Description copied from interface: ConsumerFlowStrategy

Return the behavior for MessageHandler.Context.processed() calls.

This method is called for each chunk of messages. Implementations return a callback that will be called when applications consider a message dealt with and call MessageHandler.Context.processed(). The callback can count messages and provide credits accordingly.

Specified by:

start in interface ConsumerFlowStrategy

Parameters:

context - chunk context

Returns:

the message processed callback