org.apache.camel.impl
Class DefaultPollingConsumerPollStrategy

java.lang.Object
  org.apache.camel.impl.DefaultPollingConsumerPollStrategy

All Implemented Interfaces:

PollingConsumerPollStrategy

Direct Known Subclasses:

LimitedPollingConsumerPollStrategy

public class DefaultPollingConsumerPollStrategy
extends java.lang.Object
implements PollingConsumerPollStrategy

A default implementation that just logs a WARN level log in case of rollback.

The implement will not log if the rollback occurred during shutdown.

Version:

Field Summary

protected org.slf4j.Logger

log

Constructor Summary

DefaultPollingConsumerPollStrategy()

Method Summary

boolean	begin(Consumer consumer, Endpoint endpoint) Called when poll is about to begin
void	commit(Consumer consumer, Endpoint endpoint, int polledMessages) Called when poll is completed successfully
boolean	rollback(Consumer consumer, Endpoint endpoint, int retryCounter, java.lang.Exception e) Called when poll failed

Methods inherited from class java.lang.Object

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

Field Detail

log

protected final transient org.slf4j.Logger log

Constructor Detail

DefaultPollingConsumerPollStrategy

public DefaultPollingConsumerPollStrategy()

Method Detail

begin

public boolean begin(Consumer consumer,
                     Endpoint endpoint)

Description copied from interface: PollingConsumerPollStrategy

Called when poll is about to begin

Specified by:

begin in interface PollingConsumerPollStrategy

Parameters:

consumer - the consumer

endpoint - the endpoint being consumed

Returns:

true to begin polling, or false to skip polling this time.

commit

public void commit(Consumer consumer,
                   Endpoint endpoint,
                   int polledMessages)

Description copied from interface: PollingConsumerPollStrategy

Called when poll is completed successfully

Specified by:

commit in interface PollingConsumerPollStrategy

Parameters:

consumer - the consumer

endpoint - the endpoint being consumed

polledMessages - number of messages polled, will be 0 if no message was polled at all.

rollback

public boolean rollback(Consumer consumer,
                        Endpoint endpoint,
                        int retryCounter,
                        java.lang.Exception e)
                 throws java.lang.Exception

Description copied from interface: PollingConsumerPollStrategy

Called when poll failed

Specified by:

rollback in interface PollingConsumerPollStrategy

Parameters:

consumer - the consumer

endpoint - the endpoint being consumed

retryCounter - current retry attempt, starting from 0.

e - the caused exception

Returns:

whether to retry immediately or not. Return false to ignore the problem, true to try immediately again

Throws:

java.lang.Exception - can be used to rethrow the caused exception. Notice that thrown an exception will terminate the scheduler and thus Camel will not trigger again. So if you want to let the scheduler to continue to run then do not throw any exception from this method.