nl.nn.adapterframework.core

Interface IPeekableListener<M>

All Superinterfaces:

org.springframework.context.ApplicationContextAware, org.springframework.beans.factory.Aware, IConfigurable, IConfigurationAware, IListener<M>, INamedObject, IPullingListener<M>, IScopeProvider

All Known Implementing Classes:

JdbcListener, JdbcQueryListener, JdbcTableListener, MessageStoreListener

public interface IPeekableListener<M>
extends IPullingListener<M>

PullingListener extension that checks for available messages to retrieve without starting a XA transaction. With a MS SQL database and a high load it has been noticed that the application and database transaction coordinator were out of sync which resulted in hanging distributed transactions.

Method Summary

Modifier and Type	Method and Description
boolean	hasRawMessageAvailable()
boolean	isPeekUntransacted()
void	setPeekUntransacted(boolean b) when true, then PollingListener container will execute getRawMessage() only when hasRawMessageAvailable() has returned true.

Methods inherited from interface nl.nn.adapterframework.core.IPullingListener

closeThread, getRawMessage, openThread

Methods inherited from interface nl.nn.adapterframework.core.IListener

afterMessageProcessed, close, configure, extractMessage, open

Methods inherited from interface nl.nn.adapterframework.core.INamedObject

getName, setName

Methods inherited from interface nl.nn.adapterframework.core.IConfigurationAware

getApplicationContext, getName

Methods inherited from interface nl.nn.adapterframework.core.IScopeProvider

getConfigurationClassLoader

Methods inherited from interface org.springframework.context.ApplicationContextAware

setApplicationContext

Method Detail

hasRawMessageAvailable

boolean hasRawMessageAvailable()
                        throws ListenerException

Throws:

ListenerException

setPeekUntransacted

void setPeekUntransacted(boolean b)

when true, then PollingListener container will execute getRawMessage() only when hasRawMessageAvailable() has returned true. This avoids rolling back a lot of XA transactions, that appears to be problematic on MS SQL Server

Default value

true

isPeekUntransacted

boolean isPeekUntransacted()