Package org.springframework.cloud.zookeeper.discovery.watcher

Class DefaultDependencyWatcher

java.lang.Object

org.springframework.cloud.zookeeper.discovery.watcher.DefaultDependencyWatcher

All Implemented Interfaces:

EventListener, DependencyRegistrationHookProvider, org.springframework.context.ApplicationListener<org.springframework.cloud.client.discovery.event.InstanceRegisteredEvent<?>>

public class DefaultDependencyWatcher
extends Object
implements DependencyRegistrationHookProvider, org.springframework.context.ApplicationListener<org.springframework.cloud.client.discovery.event.InstanceRegisteredEvent<?>>

This Dependency Watcher will verify the presence of dependencies upon startup and registers listeners to changing of state of dependencies during the application's lifecycle.

Since:

1.0.0

Author:

Marcin Grzejszczak, Michal Chmielarz, 4financeIT

See Also:

• DependencyPresenceOnStartupVerifier
• DependencyWatcherListener

Constructor Summary

Constructors

Constructor	Description
DefaultDependencyWatcher(org.apache.curator.x.discovery.ServiceDiscovery<ZookeeperInstance> serviceDiscovery, DependencyPresenceOnStartupVerifier dependencyPresenceOnStartupVerifier, List<DependencyWatcherListener> dependencyWatcherListeners, ZookeeperDependencies zookeeperDependencies)

Method Summary

Modifier and Type	Method	Description
void	clearDependencyRegistrationHooks()	Unregister hooks upon dependencies registration.
void	onApplicationEvent(org.springframework.cloud.client.discovery.event.InstanceRegisteredEvent<?> event)
void	registerDependencyRegistrationHooks()	Register hooks upon dependencies registration.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.context.ApplicationListener

supportsAsyncExecution

Constructor Details

DefaultDependencyWatcher

public DefaultDependencyWatcher(org.apache.curator.x.discovery.ServiceDiscovery<ZookeeperInstance> serviceDiscovery,
 DependencyPresenceOnStartupVerifier dependencyPresenceOnStartupVerifier,
 List<DependencyWatcherListener> dependencyWatcherListeners,
 ZookeeperDependencies zookeeperDependencies)

Method Details

onApplicationEvent

public void onApplicationEvent(org.springframework.cloud.client.discovery.event.InstanceRegisteredEvent<?> event)

Specified by:

onApplicationEvent in interface org.springframework.context.ApplicationListener<org.springframework.cloud.client.discovery.event.InstanceRegisteredEvent<?>>

registerDependencyRegistrationHooks

public void registerDependencyRegistrationHooks()

Description copied from interface: DependencyRegistrationHookProvider

Register hooks upon dependencies registration.

Specified by:

registerDependencyRegistrationHooks in interface DependencyRegistrationHookProvider

clearDependencyRegistrationHooks

public void clearDependencyRegistrationHooks()
                                      throws IOException

Description copied from interface: DependencyRegistrationHookProvider

Unregister hooks upon dependencies registration.

Specified by:

clearDependencyRegistrationHooks in interface DependencyRegistrationHookProvider

Throws:

IOException - if clearing fails.