org.apache.ambari.server.orm.dao

Class ExtensionLinkDAO

java.lang.Object

org.apache.ambari.server.orm.dao.ExtensionLinkDAO

public class ExtensionLinkDAO
extends Object

The ExtensionLinkDAO class is used to manage the persistence and retrieval of ExtensionLinkEntity instances. An extension version is like a stack version but it contains custom services. Linking an extension version to the current stack version allows the cluster to install the custom services contained in the extension version.

Constructor Summary

Constructors

Constructor and Description
ExtensionLinkDAO()

Method Summary

Modifier and Type	Method and Description
void	create(ExtensionLinkEntity link) Persists a new extension link instance.
void	createOrUpdate(ExtensionLinkEntity link) Creates or updates the specified entity.
List<ExtensionLinkEntity>	find(ExtensionLinkRequest request) Gets the extension links that match the specified stack name and version.
List<ExtensionLinkEntity>	findAll() Gets all of the defined extension links.
List<ExtensionLinkEntity>	findByExtension(String extensionName, String extensionVersion) Gets the extension links that match the specified extension name and version.
ExtensionLinkEntity	findById(long linkId) Gets an extension link with the specified ID.
List<ExtensionLinkEntity>	findByStack(String stackName, String stackVersion) Gets the extension links that match the specified stack name and version.
ExtensionLinkEntity	findByStackAndExtension(String stackName, String stackVersion, String extensionName, String extensionVersion) Gets the extension link that match the specified stack name, stack version, extension name and extension version.
List<ExtensionLinkEntity>	findByStackAndExtensionName(String stackName, String stackVersion, String extensionName) Gets the extension link that match the specified stack name, stack version and extension name.
ExtensionLinkEntity	merge(ExtensionLinkEntity link) Merge the specified extension link with the existing extension link in the database.
void	refresh(ExtensionLinkEntity link) Refresh the state of the extension instance from the database.
void	remove(ExtensionLinkEntity link) Removes the specified extension link

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtensionLinkDAO

public ExtensionLinkDAO()

Method Detail

find

public List<ExtensionLinkEntity> find(ExtensionLinkRequest request)

Gets the extension links that match the specified stack name and version.

Returns:

the extension links matching the specified stack name and version if any.

findById

public ExtensionLinkEntity findById(long linkId)

Gets an extension link with the specified ID.

Parameters:

linkId - the ID of the extension link to retrieve.

Returns:

the extension or null if none exists.

findAll

public List<ExtensionLinkEntity> findAll()

Gets all of the defined extension links.

Returns:

all of the extension links loaded from resources or an empty list (never null).

findByExtension

public List<ExtensionLinkEntity> findByExtension(String extensionName,
                                                 String extensionVersion)

Gets the extension links that match the specified extension name and version.

Returns:

the extension links matching the specified extension name and version if any.

findByStack

public List<ExtensionLinkEntity> findByStack(String stackName,
                                             String stackVersion)

Gets the extension links that match the specified stack name and version.

Returns:

the extension links matching the specified stack name and version if any.

findByStackAndExtensionName

public List<ExtensionLinkEntity> findByStackAndExtensionName(String stackName,
                                                             String stackVersion,
                                                             String extensionName)

Gets the extension link that match the specified stack name, stack version and extension name.

Returns:

the extension link matching the specified stack name, stack version and extension name if any.

findByStackAndExtension

public ExtensionLinkEntity findByStackAndExtension(String stackName,
                                                   String stackVersion,
                                                   String extensionName,
                                                   String extensionVersion)

Gets the extension link that match the specified stack name, stack version, extension name and extension version.

Returns:

the extension link matching the specified stack name, stack version, extension name and extension version if any.

create

public void create(ExtensionLinkEntity link)
            throws org.apache.ambari.server.AmbariException

Persists a new extension link instance.

Parameters:

link - the extension link to persist (not null).

Throws:

org.apache.ambari.server.AmbariException

refresh

public void refresh(ExtensionLinkEntity link)

Refresh the state of the extension instance from the database.

Parameters:

link - the extension link to refresh (not null).

merge

public ExtensionLinkEntity merge(ExtensionLinkEntity link)

Merge the specified extension link with the existing extension link in the database.

Parameters:

link - the extension link to merge (not null).

Returns:

the updated extension link with merged content (never null).

createOrUpdate

public void createOrUpdate(ExtensionLinkEntity link)
                    throws org.apache.ambari.server.AmbariException

Creates or updates the specified entity. This method will check ExtensionLinkEntity.getLinkId() in order to determine whether the entity should be created or merged.

Parameters:

link - the link to create or update (not null).

Throws:

org.apache.ambari.server.AmbariException

remove

public void remove(ExtensionLinkEntity link)

Removes the specified extension link

Parameters:

link - the extension link to remove.