Package org.springframework.integration.channel

Class DirectChannel

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.channel.AbstractMessageChannel

org.springframework.integration.channel.AbstractSubscribableChannel

org.springframework.integration.channel.DirectChannel

All Implemented Interfaces:

Aware, BeanFactoryAware, BeanNameAware, DisposableBean, InitializingBean, ApplicationContextAware, ExpressionCapable, IntegrationPattern, NamedComponent, IntegrationManagement, SubscribableChannelManagement, TrackableComponent, MessageChannel, SubscribableChannel, InterceptableChannel

public class DirectChannel
extends AbstractSubscribableChannel

A channel that invokes a single subscriber for each sent Message. The invocation will occur in the sender's thread.

Author:

Dave Syer, Mark Fisher, Iwein Fuld, Oleg Zhurakousky, Gary Russell, Artem Bilan

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.integration.channel.AbstractMessageChannel

AbstractMessageChannel.ChannelInterceptorList

Nested classes/interfaces inherited from interface org.springframework.integration.support.management.IntegrationManagement

IntegrationManagement.ManagementOverrides

Field Summary

Fields inherited from class org.springframework.integration.channel.AbstractMessageChannel

interceptors, meters

Fields inherited from class org.springframework.integration.context.IntegrationObjectSupport

EXPRESSION_PARSER, logger

Fields inherited from interface org.springframework.integration.support.management.IntegrationManagement

METER_PREFIX, RECEIVE_COUNTER_NAME, SEND_TIMER_NAME

Fields inherited from interface org.springframework.messaging.MessageChannel

INDEFINITE_TIMEOUT

Constructor Summary

Constructors

Constructor	Description
DirectChannel()	Create a channel with default RoundRobinLoadBalancingStrategy.
DirectChannel(LoadBalancingStrategy loadBalancingStrategy)	Create a DirectChannel with a LoadBalancingStrategy.

Method Summary

Modifier and Type	Method	Description
protected UnicastingDispatcher	getDispatcher()
protected void	onInit()	Subclasses may implement this for initialization logic.
void	setFailover(boolean failover)	Specify whether the channel's dispatcher should have failover enabled.
void	setFailoverStrategy(Predicate<Exception> failoverStrategy)	Configure a strategy whether the channel's dispatcher should have failover enabled for the exception thrown.
void	setMaxSubscribers(int maxSubscribers)	Specify the maximum number of subscribers supported by the channel's dispatcher.

Methods inherited from class org.springframework.integration.channel.AbstractSubscribableChannel

doSend, getSubscriberCount, subscribe, unsubscribe

Methods inherited from class org.springframework.integration.channel.AbstractMessageChannel

addInterceptor, addInterceptor, destroy, getComponentType, getFullChannelName, getIChannelInterceptorList, getIntegrationPatternType, getInterceptors, getMetricsCaptor, getOverrides, isLoggingEnabled, isObserved, registerMetricsCaptor, registerObservationRegistry, removeInterceptor, removeInterceptor, send, send, setDatatypes, setInterceptors, setLoggingEnabled, setMessageConverter, setObservationConvention, setShouldTrack

Methods inherited from class org.springframework.integration.context.IntegrationObjectSupport

afterPropertiesSet, extractTypeIfPossible, generateId, getApplicationContext, getApplicationContextId, getBeanDescription, getBeanFactory, getBeanName, getChannelResolver, getComponentName, getConversionService, getExpression, getIntegrationProperties, getMessageBuilderFactory, getTaskScheduler, isInitialized, setApplicationContext, setBeanFactory, setBeanName, setChannelResolver, setComponentName, setConversionService, setMessageBuilderFactory, setPrimaryExpression, setTaskScheduler, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.integration.support.management.IntegrationManagement

getManagedName, getManagedType, getThisAs, setManagedName, setManagedType

Methods inherited from interface org.springframework.messaging.MessageChannel

send, send

Methods inherited from interface org.springframework.integration.support.context.NamedComponent

getBeanName, getComponentName

Constructor Details

DirectChannel

public DirectChannel()

Create a channel with default RoundRobinLoadBalancingStrategy.

DirectChannel

public DirectChannel(@Nullable
 LoadBalancingStrategy loadBalancingStrategy)

Create a DirectChannel with a LoadBalancingStrategy. Can be null meaning that no balancing is applied; every message is always going to be handled by the first subscriber.

Parameters:

loadBalancingStrategy - The load balancing strategy implementation.

See Also:

• setFailover(boolean)

Method Details

setFailover

public void setFailover(boolean failover)

Specify whether the channel's dispatcher should have failover enabled. By default, it will. Set this value to 'false' to disable it. Overrides setFailoverStrategy(Predicate) option. In other words: or this, or that option has to be set.

Parameters:

failover - The failover boolean.

setFailoverStrategy

public void setFailoverStrategy(Predicate<Exception> failoverStrategy)

Configure a strategy whether the channel's dispatcher should have failover enabled for the exception thrown. Overrides setFailover(boolean) option. In other words: or this, or that option has to be set.

Parameters:

failoverStrategy - The failover boolean.

Since:

6.3

setMaxSubscribers

public void setMaxSubscribers(int maxSubscribers)

Specify the maximum number of subscribers supported by the channel's dispatcher.

Parameters:

maxSubscribers - The maximum number of subscribers allowed.

getDispatcher

protected UnicastingDispatcher getDispatcher()

Specified by:

getDispatcher in class AbstractSubscribableChannel

onInit

protected void onInit()

Description copied from class: IntegrationObjectSupport

Subclasses may implement this for initialization logic.

Overrides:

onInit in class AbstractMessageChannel