org.elasticsearch.watcher

Class ResourceWatcherService

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

org.elasticsearch.common.component.AbstractLifecycleComponent<ResourceWatcherService>

org.elasticsearch.watcher.ResourceWatcherService

All Implemented Interfaces:

AutoCloseable, LifecycleComponent<ResourceWatcherService>, Releasable

public class ResourceWatcherService
extends AbstractLifecycleComponent<ResourceWatcherService>

Generic resource watcher service Other elasticsearch services can register their resource watchers with this service using add(ResourceWatcher) method. This service will call ResourceWatcher.checkAndNotify() method of all registered watcher periodically. The frequency of checks can be specified using resource.reload.interval setting, which defaults to 60s. The service can be disabled by setting resource.reload.enabled setting to false.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ResourceWatcherService.Frequency

Field Summary

Fields inherited from class org.elasticsearch.common.component.AbstractLifecycleComponent

lifecycle

Fields inherited from class org.elasticsearch.common.component.AbstractComponent

deprecationLogger, logger, settings

Constructor Summary

Constructors

Constructor and Description
ResourceWatcherService(Settings settings, ThreadPool threadPool)

Method Summary

Modifier and Type	Method and Description
<W extends ResourceWatcher> WatcherHandle<W>	add(W watcher) Register new resource watcher that will be checked in default MEDIUM frequency
<W extends ResourceWatcher> WatcherHandle<W>	add(W watcher, ResourceWatcherService.Frequency frequency) Register new resource watcher that will be checked in the given frequency
protected void	doClose()
protected void	doStart()
protected void	doStop()
void	notifyNow()
void	notifyNow(ResourceWatcherService.Frequency frequency)

Methods inherited from class org.elasticsearch.common.component.AbstractLifecycleComponent

addLifecycleListener, close, lifecycleState, removeLifecycleListener, start, stop

Methods inherited from class org.elasticsearch.common.component.AbstractComponent

logDeprecatedSetting, logRemovedSetting, nodeName

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceWatcherService

@Inject
public ResourceWatcherService(Settings settings,
                                      ThreadPool threadPool)

Method Detail

doStart

protected void doStart()

Specified by:

doStart in class AbstractLifecycleComponent<ResourceWatcherService>

doStop

protected void doStop()

Specified by:

doStop in class AbstractLifecycleComponent<ResourceWatcherService>

doClose

protected void doClose()

Specified by:

doClose in class AbstractLifecycleComponent<ResourceWatcherService>

add

public <W extends ResourceWatcher> WatcherHandle<W> add(W watcher)
                                                 throws IOException

Register new resource watcher that will be checked in default MEDIUM frequency

Throws:

IOException

add

public <W extends ResourceWatcher> WatcherHandle<W> add(W watcher,
                                                        ResourceWatcherService.Frequency frequency)
                                                 throws IOException

Register new resource watcher that will be checked in the given frequency

Throws:

IOException

notifyNow

public void notifyNow()

notifyNow

public void notifyNow(ResourceWatcherService.Frequency frequency)