com.vaadin.collaborationengine

Class LocalBackend

java.lang.Object

com.vaadin.collaborationengine.LocalBackend

All Implemented Interfaces:

Backend

public class LocalBackend
extends Object
implements Backend

A simple backend implementation that only distributes events locally and assumes that there is no previous history for event logs.

Author:

Vaadin Ltd

Nested Class Summary

Nested classes/interfaces inherited from interface com.vaadin.collaborationengine.Backend

Backend.EventLog

Constructor Summary

Constructors

Constructor and Description
LocalBackend()

Method Summary

Modifier and Type	Method and Description
Backend.EventLog	openEventLog(String topicId) Opens an event log with the given id.

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalBackend

public LocalBackend()

Method Detail

openEventLog

public Backend.EventLog openEventLog(String topicId)

Description copied from interface: Backend

Opens an event log with the given id. The returned object can be used to capture any common state related to this particular event log. An actual underlying connection is not needed until EventLog#subscribe(Consumer) is invoked, but it is still recommended to make this method fail fast in case it would not be possible to open an actual underlying connection later.

Specified by:

openEventLog in interface Backend

Parameters:

topicId - the id of the event log to open, not null

Returns:

an object representing the event log, not null