org.apache.ambari.server.configuration

Class AmbariServerConfigurationProvider<T extends AmbariServerConfiguration>

java.lang.Object

org.apache.ambari.server.configuration.AmbariServerConfigurationProvider<T>

All Implemented Interfaces:

javax.inject.Provider<T>

Direct Known Subclasses:

AmbariLdapConfigurationProvider, AmbariTProxyConfigurationProvider, JwtAuthenticationPropertiesProvider

public abstract class AmbariServerConfigurationProvider<T extends AmbariServerConfiguration>
extends Object
implements com.google.inject.Provider<T>

AmbariServerConfigurationProvider is an abstract class to be extended by Ambari server configuration provider classes.

This implementation registers for the following Ambari server events to help load the relevant properties when available and/or updated:

• AmbariConfigurationChangedEvent
• JpaInitializedEvent

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AmbariServerConfigurationProvider(AmbariServerConfigurationCategory configurationCategory, AmbariEventPublisher publisher, AmbariJpaPersistService persistService)

Method Summary

Modifier and Type	Method and Description
void	ambariConfigurationChanged(AmbariConfigurationChangedEvent event) Upon receiving this event, if the expected configuration category has been updated, the data is reloaded.
T	get()
void	jpaInitialized(JpaInitializedEvent event) Upon receiving this event, the JPA infrastructure has completed initialization and the relevant data may be retrieved.
protected abstract T	loadInstance(Collection<AmbariConfigurationEntity> configurationEntities) Returns a instance of the data configuration container implementation filled with data from the supplied collection of AmbariConfigurationEntitys
protected Map<String,String>	toProperties(Collection<AmbariConfigurationEntity> configurationEntities) Converts a collection of AmbariConfigurationEntitys into a map of property names to values.

Methods inherited from class java.lang.Object

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

Constructor Detail

AmbariServerConfigurationProvider

protected AmbariServerConfigurationProvider(AmbariServerConfigurationCategory configurationCategory,
                                            AmbariEventPublisher publisher,
                                            AmbariJpaPersistService persistService)

Method Detail

ambariConfigurationChanged

public void ambariConfigurationChanged(AmbariConfigurationChangedEvent event)

Upon receiving this event, if the expected configuration category has been updated, the data is reloaded.

Parameters:

event - the received AmbariConfigurationChangedEvent

jpaInitialized

public void jpaInitialized(JpaInitializedEvent event)

Upon receiving this event, the JPA infrastructure has completed initialization and the relevant data may be retrieved.

Parameters:

event - the received JpaInitializedEvent

get

public T get()

Specified by:

get in interface javax.inject.Provider<T extends AmbariServerConfiguration>

toProperties

protected Map<String,String> toProperties(Collection<AmbariConfigurationEntity> configurationEntities)

Converts a collection of AmbariConfigurationEntitys into a map of property names to values.

Parameters:

configurationEntities - the collection of AmbariConfigurationEntitys to process

Returns:

a map of property names to values; or an empty map if no entities are available to process

loadInstance

protected abstract T loadInstance(Collection<AmbariConfigurationEntity> configurationEntities)

Returns a instance of the data configuration container implementation filled with data from the supplied collection of AmbariConfigurationEntitys

Parameters:

configurationEntities - a collection of AmbariConfigurationEntitys

Returns:

an instance of the data configuration container implementation