org.gcube.data.tmf.api
Interface SourceEvent

public interface SourceEvent

An event in the lifetime of a Source.

There are two pre-defined lifetime events for which the service subscribes ( CHANGE,REMOVE). Plugins notify these events to SourceNotifiers so as to inform the service of changes in the lifetime of data sources. In turn, the service broadcasts them to clients that have expressed an interest in them.

Plugins that desire increased decoupling between some of their components may define additional source events, subscribe some components as consumers of these events, and notify these events from yet other components.

Author:

Fabio Simeoni

See Also:

SourceNotifier, Source.notifier(), SourceConsumer

Field Summary

static SourceEvent	CHANGE Signals a change in the data source.
static SourceEvent	REMOVE Signals that the data source is no longer accessible to the plugin.

Field Detail

CHANGE

static final SourceEvent CHANGE

Signals a change in the data source.

A notification of this event tells the service to broadcast the change to its clients.

REMOVE

static final SourceEvent REMOVE

Signals that the data source is no longer accessible to the plugin.

A notification of this event tells the service to stop exposing the data source to its client and to reclaim resources allocated to its management.