com.amazon.sqs.javamessaging.acknowledge

Class RangedAcknowledger

java.lang.Object

com.amazon.sqs.javamessaging.acknowledge.BulkSQSOperation

com.amazon.sqs.javamessaging.acknowledge.RangedAcknowledger

All Implemented Interfaces:

Acknowledger

public class RangedAcknowledger
extends BulkSQSOperation
implements Acknowledger

Used to acknowledge group of messages. Acknowledging a consumed message acknowledges all messages that the session has consumed before and including that message.

A big backlog of consumed messages can cause memory pressure, as well as an increase on the probability of duplicates.

This class is not safe for concurrent use.

Constructor Summary

Constructors

Constructor and Description
RangedAcknowledger(AmazonSQSMessagingClientWrapper amazonSQSClient, SQSSession session)

Method Summary

Modifier and Type	Method and Description
void	acknowledge(SQSMessage message) Acknowledges all the consumed messages as well as the previously consumed messages on the session via calling deleteMessageBatch until all the messages are deleted.
void	action(String queueUrl, List<String> receiptHandles) Acknowledges up to 10 messages via calling deleteMessageBatch.
void	forgetUnAckMessages() Clears the list of not acknowledged messages.
List<SQSMessageIdentifier>	getUnAckMessages() Returns the list of all consumed but not acknowledged messages.
void	notifyMessageReceived(SQSMessage message) Updates the internal queue for the consumed but not acknowledged messages if the message was not already on queue.

Methods inherited from class com.amazon.sqs.javamessaging.acknowledge.BulkSQSOperation

bulkAction

Methods inherited from class java.lang.Object

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

Constructor Detail

RangedAcknowledger

public RangedAcknowledger(AmazonSQSMessagingClientWrapper amazonSQSClient,
                          SQSSession session)

Method Detail

acknowledge

public void acknowledge(SQSMessage message)
                 throws javax.jms.JMSException

Acknowledges all the consumed messages as well as the previously consumed messages on the session via calling deleteMessageBatch until all the messages are deleted.

Specified by:

acknowledge in interface Acknowledger

Parameters:

message - message to acknowledge.

Throws:

javax.jms.JMSException

notifyMessageReceived

public void notifyMessageReceived(SQSMessage message)
                           throws javax.jms.JMSException

Updates the internal queue for the consumed but not acknowledged messages if the message was not already on queue.

Specified by:

notifyMessageReceived in interface Acknowledger

Parameters:

message - notify acknowledger message is received

Throws:

javax.jms.JMSException

getUnAckMessages

public List<SQSMessageIdentifier> getUnAckMessages()

Returns the list of all consumed but not acknowledged messages.

Specified by:

getUnAckMessages in interface Acknowledger

forgetUnAckMessages

public void forgetUnAckMessages()

Clears the list of not acknowledged messages.

Specified by:

forgetUnAckMessages in interface Acknowledger

action

public void action(String queueUrl,
                   List<String> receiptHandles)
            throws javax.jms.JMSException

Acknowledges up to 10 messages via calling deleteMessageBatch.

Specified by:

action in class BulkSQSOperation

Parameters:

queueUrl - queueUrl of the queue, which the receipt handles belong

receiptHandles - the list of handles, which is be used to (negative)acknowledge the messages.

Throws:

javax.jms.JMSException