org.springframework.integration.router

Class ExpressionEvaluatingRouter

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.handler.MessageHandlerSupport

org.springframework.integration.handler.AbstractMessageHandler

org.springframework.integration.router.AbstractMessageRouter

org.springframework.integration.router.AbstractMappingMessageRouter

org.springframework.integration.router.ExpressionEvaluatingRouter

All Implemented Interfaces:

org.reactivestreams.Subscriber<Message<?>>, Aware, BeanFactoryAware, BeanNameAware, DisposableBean, InitializingBean, ApplicationContextAware, Lifecycle, Ordered, ExpressionCapable, Orderable, IntegrationPattern, MessageRouter, NamedComponent, IntegrationManagement, ManageableLifecycle, MappingMessageRouterManagement, TrackableComponent, MessageHandler, reactor.core.CoreSubscriber<Message<?>>

public class ExpressionEvaluatingRouter
extends AbstractMappingMessageRouter

A Message Router implementation that evaluates the specified SpEL expression. The result of evaluation will typically be a String to be resolved to a channel name or a Collection (or Array) of strings.

Since:

2.0

Author:

Mark Fisher, Gary Russell

Nested Class Summary

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

IntegrationManagement.ManagementOverrides

Field Summary

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

EXPRESSION_PARSER, logger

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

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

METER_PREFIX, RECEIVE_COUNTER_NAME, SEND_TIMER_NAME

Constructor Summary

Constructors

Constructor and Description
ExpressionEvaluatingRouter(Expression expression) Construct an instance with the supplied Expression.
ExpressionEvaluatingRouter(String expressionString) Construct an instance by parsing the supplied expression string.

Method Summary

Modifier and Type	Method and Description
protected List<Object>	getChannelKeys(Message<?> message) Subclasses must implement this method to return the channel keys.
boolean	isRunning()
void	onInit() Subclasses may implement this for initialization logic.
void	start()
void	stop()

Methods inherited from class org.springframework.integration.router.AbstractMappingMessageRouter

determineTargetChannels, getChannelMappings, getDynamicChannelNames, removeChannelMapping, replaceChannelMappings, setChannelKeyFallback, setChannelMapping, setChannelMappings, setDynamicChannelLimit, setPrefix, setResolutionRequired, setSuffix

Methods inherited from class org.springframework.integration.router.AbstractMessageRouter

getComponentType, getDefaultOutputChannel, getIntegrationPatternType, getMessagingTemplate, getRequiredConversionService, handleMessageInternal, setApplySequence, setDefaultOutputChannel, setDefaultOutputChannelName, setIgnoreSendFailures, setSendTimeout

Methods inherited from class org.springframework.integration.handler.AbstractMessageHandler

handleMessage, onComplete, onError, onNext, onSubscribe

Methods inherited from class org.springframework.integration.handler.MessageHandlerSupport

buildSendTimer, destroy, getManagedName, getManagedType, getMetricsCaptor, getOrder, getOverrides, isLoggingEnabled, registerMetricsCaptor, sendTimer, setLoggingEnabled, setManagedName, setManagedType, setOrder, setShouldTrack, shouldTrack

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

afterPropertiesSet, extractTypeIfPossible, generateId, getApplicationContext, getApplicationContextId, getBeanDescription, getBeanFactory, getBeanName, getChannelResolver, getComponentName, getConversionService, getExpression, getIntegrationProperties, getIntegrationProperty, 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 reactor.core.CoreSubscriber

currentContext

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

getThisAs

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

getBeanName, getComponentName

Constructor Detail

ExpressionEvaluatingRouter

public ExpressionEvaluatingRouter(String expressionString)

Construct an instance by parsing the supplied expression string.

Parameters:

expressionString - the expression string.

ExpressionEvaluatingRouter

public ExpressionEvaluatingRouter(Expression expression)

Construct an instance with the supplied Expression.

Parameters:

expression - the expression.

Method Detail

onInit

public final void onInit()

Description copied from class: IntegrationObjectSupport

Subclasses may implement this for initialization logic.

Overrides:

onInit in class AbstractMessageRouter

start

public void start()

Specified by:

start in interface Lifecycle

Specified by:

start in interface ManageableLifecycle

stop

public void stop()

Specified by:

stop in interface Lifecycle

Specified by:

stop in interface ManageableLifecycle

isRunning

public boolean isRunning()

Specified by:

isRunning in interface Lifecycle

Specified by:

isRunning in interface ManageableLifecycle

getChannelKeys

protected List<Object> getChannelKeys(Message<?> message)

Description copied from class: AbstractMappingMessageRouter

Subclasses must implement this method to return the channel keys. A "key" might be present in this router's "channelMappings", or it could be the channel's name or even the Message Channel instance itself.

Specified by:

getChannelKeys in class AbstractMappingMessageRouter

Parameters:

message - The message.

Returns:

The channel keys.