org.apache.ambari.server.orm.dao

Class StackDAO

java.lang.Object

org.apache.ambari.server.orm.dao.StackDAO

public class StackDAO
extends Object

The StackDAO class is used to manage the persistence and retrieval of StackEntity instances.

Constructor Summary

Constructors

Constructor and Description
StackDAO()

Method Summary

Modifier and Type	Method and Description
void	create(StackEntity stack) Persists a new stack instance.
void	createOrUpdate(StackEntity stack) Creates or updates the specified entity.
StackEntity	find(StackId stackId) Gets the stack that matches the specified stack ID by name and version.
StackEntity	find(String stackName, String stackVersion) Gets the stack that matches the specified name and version.
List<StackEntity>	findAll() Gets all of the defined stacks.
StackEntity	findById(long stackId) Gets a stack with the specified ID.
StackEntity	findByMpack(Long mpackId) Gets the stack that matches the specified mpackid.
StackEntity	merge(StackEntity stack) Merge the speicified stack with the existing stack in the database.
void	refresh(StackEntity stack) Refresh the state of the stack instance from the database.
void	remove(StackEntity stack) Removes the specified stack and all related clusters, services and components.
void	removeByMpack(Long mpackId) Removes the specified stack based on mpackid.

Methods inherited from class java.lang.Object

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

Constructor Detail

StackDAO

public StackDAO()

Method Detail

findById

public StackEntity findById(long stackId)

Gets a stack with the specified ID.

Parameters:

stackId - the ID of the stack to retrieve.

Returns:

the stack or null if none exists.

findAll

public List<StackEntity> findAll()

Gets all of the defined stacks.

Returns:

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

find

public StackEntity find(String stackName,
                        String stackVersion)

Gets the stack that matches the specified name and version.

Returns:

the stack matching the specified name and version or null if none.

find

public StackEntity find(StackId stackId)

Gets the stack that matches the specified stack ID by name and version.

Parameters:

stackId - the stack ID to find (not null).

Returns:

the stack matching the specified name and version or null if none.

create

public void create(StackEntity stack)
            throws org.apache.ambari.server.AmbariException

Persists a new stack instance.

Parameters:

stack - the stack to persist (not null).

Throws:

org.apache.ambari.server.AmbariException

refresh

public void refresh(StackEntity stack)

Refresh the state of the stack instance from the database.

Parameters:

stack - the stack to refresh (not null).

merge

public StackEntity merge(StackEntity stack)

Merge the speicified stack with the existing stack in the database.

Parameters:

stack - the stack to merge (not null).

Returns:

the updated stack with merged content (never null).

createOrUpdate

public void createOrUpdate(StackEntity stack)
                    throws org.apache.ambari.server.AmbariException

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

Parameters:

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

Throws:

org.apache.ambari.server.AmbariException

remove

public void remove(StackEntity stack)

Removes the specified stack and all related clusters, services and components.

Parameters:

stack - the stack to remove.

removeByMpack

public void removeByMpack(Long mpackId)

Removes the specified stack based on mpackid.

Parameters:

mpackId -

findByMpack

public StackEntity findByMpack(Long mpackId)

Gets the stack that matches the specified mpackid.

Returns:

the stack matching the specified mpackid or null if none.