org.apache.ambari.server.api.handlers

Class BaseManagementHandler

java.lang.Object

org.apache.ambari.server.api.handlers.BaseManagementHandler

All Implemented Interfaces:

RequestHandler

Direct Known Subclasses:

CreateHandler, DeleteHandler, QueryCreateHandler, UpdateHandler

public abstract class BaseManagementHandler
extends Object
implements RequestHandler

Base handler for operations that persist state to the back-end.

Field Summary

Fields

Modifier and Type	Field and Description
static String	RESOURCES_NODE_NAME

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BaseManagementHandler() Constructor.

Method Summary

Modifier and Type	Method and Description
protected abstract ResultMetadata	convert(RequestStatusMetaData requestStatusMetaData) Convert RequestStatusMetaData object to ResultMetadata which will be included in Result object.
protected Result	createResult(RequestStatus requestStatus) Create a result from a request status.
protected ClusterController	getClusterController() Get the cluster controller instance.
protected PersistenceManager	getPersistenceManager() Get the persistence manager instance.
Result	handleRequest(Request request) Handle the given request and return a result.
protected abstract Result	persist(ResourceInstance resource, RequestBody body) Persist the operation to the back end.

Methods inherited from class java.lang.Object

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

Field Detail

RESOURCES_NODE_NAME

public static final String RESOURCES_NODE_NAME

See Also:

Constant Field Values

Constructor Detail

BaseManagementHandler

protected BaseManagementHandler()

Constructor.

Method Detail

handleRequest

public Result handleRequest(Request request)

Description copied from interface: RequestHandler

Handle the given request and return a result.

Specified by:

handleRequest in interface RequestHandler

Parameters:

request - the request to handle

Returns:

the result of the request

createResult

protected Result createResult(RequestStatus requestStatus)

Create a result from a request status.

Parameters:

requestStatus - the request status to build the result from.

Returns:

a Result instance for the provided request status

getClusterController

protected ClusterController getClusterController()

Get the cluster controller instance.

Returns:

cluster controller

getPersistenceManager

protected PersistenceManager getPersistenceManager()

Get the persistence manager instance.

Returns:

persistence manager

persist

protected abstract Result persist(ResourceInstance resource,
                                  RequestBody body)

Persist the operation to the back end.

Parameters:

resource - associated resource

body - associated request body

Returns:

the result of the persist operation

convert

protected abstract ResultMetadata convert(RequestStatusMetaData requestStatusMetaData)

Convert RequestStatusMetaData object to ResultMetadata which will be included in Result object.

Parameters:

requestStatusMetaData - request status details

Returns:

result details