de.otto.synapse.journal

Class JournalingInterceptor

java.lang.Object

de.otto.synapse.journal.JournalingInterceptor

All Implemented Interfaces:

MessageInterceptor

public class JournalingInterceptor
extends java.lang.Object
implements MessageInterceptor

Interceptor used to add the messages of event-sourced entities to a Journal.

Constructor Summary

Constructors

Constructor and Description
JournalingInterceptor(java.lang.String channelName, Journal journal) Creates a JournalingInterceptor for a channel, using the given Journal.

Method Summary

Modifier and Type	Method and Description
Journal	getJournal()
TextMessage	intercept(TextMessage message) Intercept a message and return the same message, a modified version of the incoming message, or null, if the message should be filtered out and dropped by the AbstractMessageEndpoint

Methods inherited from class java.lang.Object

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

Constructor Detail

JournalingInterceptor

public JournalingInterceptor(@Nonnull
                             java.lang.String channelName,
                             @Nonnull
                             Journal journal)

Creates a JournalingInterceptor for a channel, using the given Journal.

Parameters:

channelName - the name of the journaled channel

journal - the Journal used to record messages for the channel

Throws:

java.lang.IllegalStateException - if the Journal's MessageStore does not provide an Index.JOURNAL_KEY

Method Detail

intercept

@Nonnull
public TextMessage intercept(@Nonnull
                                      TextMessage message)

Description copied from interface: MessageInterceptor

Intercept a message and return the same message, a modified version of the incoming message, or null, if the message should be filtered out and dropped by the AbstractMessageEndpoint

Specified by:

intercept in interface MessageInterceptor

Parameters:

message - the channel-layer message with payload-type beeing a String

Returns:

intercepted version of the message, or null if the message should be dropped.

getJournal

public Journal getJournal()