Package org.springframework.integration.channel

Class AbstractSubscribableChannel

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.channel.AbstractMessageChannel

org.springframework.integration.channel.AbstractSubscribableChannel

All Implemented Interfaces:

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

Direct Known Subclasses:

AbstractExecutorChannel, DirectChannel, PostgresSubscribableChannel

public abstract class AbstractSubscribableChannel
extends AbstractMessageChannel
implements SubscribableChannel, SubscribableChannelManagement

Base implementation of MessageChannel that invokes the subscribed handler(s) by delegating to a MessageDispatcher.

Author:

Mark Fisher, Oleg Zhurakousky, Gary Russell, Artme 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
AbstractSubscribableChannel()

Method Summary

Modifier and Type	Method	Description
protected boolean	doSend(Message<?> message, long timeout)	Subclasses must implement this method.
protected abstract MessageDispatcher	getDispatcher()
int	getSubscriberCount()	The number of message handlers currently subscribed to this channel.
boolean	subscribe(MessageHandler handler)
boolean	unsubscribe(MessageHandler handle)

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

addInterceptor, addInterceptor, destroy, getComponentType, getFullChannelName, getIChannelInterceptorList, getIntegrationPatternType, getInterceptors, getMetricsCaptor, getOverrides, isLoggingEnabled, isObserved, onInit, 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

AbstractSubscribableChannel

public AbstractSubscribableChannel()

Method Details

getSubscriberCount

public int getSubscriberCount()

Description copied from interface: SubscribableChannelManagement

The number of message handlers currently subscribed to this channel.

Specified by:

getSubscriberCount in interface SubscribableChannelManagement

Returns:

the number of subscribers.

subscribe

public boolean subscribe(MessageHandler handler)

Specified by:

subscribe in interface SubscribableChannel

unsubscribe

public boolean unsubscribe(MessageHandler handle)

Specified by:

unsubscribe in interface SubscribableChannel

doSend

protected boolean doSend(Message<?> message,
 long timeout)

Description copied from class: AbstractMessageChannel

Subclasses must implement this method. A non-negative timeout indicates how long to wait if the channel is at capacity (if the value is 0, it must return immediately with or without success). A negative timeout value indicates that the method should block until either the message is accepted or the blocking thread is interrupted.

Specified by:

doSend in class AbstractMessageChannel

Parameters:

message - The message.

timeout - The timeout.

Returns:

true if the send was successful.

getDispatcher

protected abstract MessageDispatcher getDispatcher()