de.otto.synapse.eventsource

Class DelegateEventSource

java.lang.Object

de.otto.synapse.eventsource.DelegateEventSource

All Implemented Interfaces:

EventSource, org.springframework.beans.factory.Aware, org.springframework.context.ApplicationContextAware

public class DelegateEventSource
extends java.lang.Object
implements EventSource, org.springframework.context.ApplicationContextAware

Constructor Summary

Constructors

Constructor and Description
DelegateEventSource(java.lang.String name, java.lang.String channelName, java.lang.String eventSourceBuilder)

Method Summary

Modifier and Type	Method and Description
ChannelPosition	consume(ChannelPosition startFrom, java.util.function.Predicate<Message<?>> stopCondition) Consumes all events from the EventSource, beginning with startFrom, until the stopCondition is met.
java.lang.String	getChannelName() Returns the name of the EventSource.
EventSource	getDelegate()
MessageDispatcher	getMessageDispatcher() Returns registered EventConsumers.
java.lang.String	getName() An event source's name is used to connect event sources to their consumers.
boolean	isStopping()
void	register(MessageConsumer<?> messageConsumer) Registers a new EventConsumer at the EventSource.
void	setApplicationContext(org.springframework.context.ApplicationContext applicationContext)
void	stop()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.otto.synapse.eventsource.EventSource

consume, consume, consume

Constructor Detail

DelegateEventSource

public DelegateEventSource(java.lang.String name,
                           java.lang.String channelName,
                           java.lang.String eventSourceBuilder)

Method Detail

getName

public java.lang.String getName()

Description copied from interface: EventSource

An event source's name is used to connect event sources to their consumers.

Specified by:

getName in interface EventSource

Returns:

the unique name

getDelegate

public EventSource getDelegate()

setApplicationContext

public void setApplicationContext(org.springframework.context.ApplicationContext applicationContext)
                           throws org.springframework.beans.BeansException

Specified by:

setApplicationContext in interface org.springframework.context.ApplicationContextAware

Throws:

org.springframework.beans.BeansException

register

public void register(MessageConsumer<?> messageConsumer)

Registers a new EventConsumer at the EventSource.

consumers have to be thread safe as it may be called from multiple threads (e.g. for kinesis streams there is one thread per shard)

Specified by:

register in interface EventSource

Parameters:

messageConsumer - the registered EventConsumer

getMessageDispatcher

@Nonnull
public MessageDispatcher getMessageDispatcher()

Returns registered EventConsumers.

Specified by:

getMessageDispatcher in interface EventSource

Returns:

EventConsumers

getChannelName

@Nonnull
public java.lang.String getChannelName()

Returns the name of the EventSource.

For streaming event-sources, this is the name of the event stream.

Specified by:

getChannelName in interface EventSource

Returns:

name

consume

public ChannelPosition consume(ChannelPosition startFrom,
                               java.util.function.Predicate<Message<?>> stopCondition)

Consumes all events from the EventSource, beginning with startFrom, until the stopCondition is met.

The registered consumers will be called zero or more times, depending on the number of events retrieved from the EventSource.

Specified by:

consume in interface EventSource

Parameters:

startFrom - the read position returned from earlier executions

stopCondition - the predicate used as a stop condition

Returns:

the new read position

stop

public void stop()

Specified by:

stop in interface EventSource

isStopping

public boolean isStopping()

Specified by:

isStopping in interface EventSource

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object