org.apache.ambari.server.orm.dao

Class AmbariConfigurationDAO

java.lang.Object

org.apache.ambari.server.orm.dao.CrudDAO<AmbariConfigurationEntity,AmbariConfigurationEntityPK>

org.apache.ambari.server.orm.dao.AmbariConfigurationDAO

@Singleton
public class AmbariConfigurationDAO
extends CrudDAO<AmbariConfigurationEntity,AmbariConfigurationEntityPK>

DAO dealing with ambari configuration related JPA operations. Operations delegate to the JPA provider implementation of CRUD operations.

Constructor Summary

Constructors

Constructor and Description
AmbariConfigurationDAO()

Method Summary

Modifier and Type	Method and Description
void	create(AmbariConfigurationEntity entity) Creates entity.
List<AmbariConfigurationEntity>	findByCategory(String categoryName) Returns the Ambari configuration properties with the requested category name from the database.
AmbariConfigurationEntity	merge(AmbariConfigurationEntity entity) Updates entity.
boolean	reconcileCategory(String categoryName, Map<String,String> properties, boolean removeIfNotProvided) Reconciles the properties associted with an Ambari confgiration category (for example, ldap-configuration) using persisted properties and the supplied properties.
int	removeByCategory(String categoryName) Removes the Ambari configuration properties with the requested category name from the database.

Methods inherited from class org.apache.ambari.server.orm.dao.CrudDAO

findAll, findByPK, findMaxId, refresh, remove, remove, removeByPK

Methods inherited from class java.lang.Object

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

Constructor Detail

AmbariConfigurationDAO

@Inject
public AmbariConfigurationDAO()

Method Detail

findByCategory

public List<AmbariConfigurationEntity> findByCategory(String categoryName)

Returns the Ambari configuration properties with the requested category name from the database.

Parameters:

categoryName - the configuration category name

Returns:

the configuration entity

removeByCategory

public int removeByCategory(String categoryName)

Removes the Ambari configuration properties with the requested category name from the database.

Parameters:

categoryName - the configuration category name

Returns:

the number of items removed

create

public void create(AmbariConfigurationEntity entity)

Description copied from class: CrudDAO

Creates entity.

Overrides:

create in class CrudDAO<AmbariConfigurationEntity,AmbariConfigurationEntityPK>

Parameters:

entity - entity to create

merge

public AmbariConfigurationEntity merge(AmbariConfigurationEntity entity)

Description copied from class: CrudDAO

Updates entity.

Overrides:

merge in class CrudDAO<AmbariConfigurationEntity,AmbariConfigurationEntityPK>

Parameters:

entity - entity to update

Returns:

updated entity

reconcileCategory

public boolean reconcileCategory(String categoryName,
                                 Map<String,String> properties,
                                 boolean removeIfNotProvided)

Reconciles the properties associted with an Ambari confgiration category (for example, ldap-configuration) using persisted properties and the supplied properties.

if removeIfNotProvided is true, only properties that exist in the new set of properties will be persisted; others will be removed.

If removeIfNotProvided is false, then the new properties will be used to update or append to the set of persisted properties.

Parameters:

categoryName - the category name for the set of properties

properties - a map of name to value pairs

removeIfNotProvided - true to explicitly set the set of properties for the category; false to upadate the set of properties for the category

Returns:

true if changes were made; false if not changes were made.