org.apache.ambari.server.stack.upgrade

Class AddComponentTask

java.lang.Object

org.apache.ambari.server.stack.upgrade.Task

org.apache.ambari.server.stack.upgrade.ServerSideActionTask

org.apache.ambari.server.stack.upgrade.AddComponentTask

public class AddComponentTask
extends ServerSideActionTask

The AddComponentTask is used for adding components during an upgrade. Components which are added via the task will also be scheduled for a restart if they appear in the upgrade pack as part of a restart group. This is true even if they do not exist in the cluster yet.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.ambari.server.stack.upgrade.Task

Task.Type

Field Summary

Fields

Modifier and Type	Field and Description
String	component The component to add.
String	hostComponent Specifies the hosts which are valid for adding teh new component, restricted by component.
ExecuteHostType	hosts The hosts to run the task on.
String	hostService Specifies the hosts which are valid for adding the new component, restricted by service.
static String	PARAMETER_SERIALIZED_ADD_COMPONENT_TASK The key which represents this task serialized.
String	service The service which owns the component to add.

Fields inherited from class org.apache.ambari.server.stack.upgrade.ServerSideActionTask

actionVerb, implClass, messages, parameters

Fields inherited from class org.apache.ambari.server.stack.upgrade.Task

condition, GSON, isSequential, scope, summary, timeoutConfig

Constructor Summary

Constructors

Constructor and Description
AddComponentTask() Constructor.

Method Summary

Modifier and Type	Method and Description
String	getActionVerb()
String	getServiceAndComponentAsString() Gets a string which is comprised of serviceName/componentName
StageWrapper.Type	getStageWrapperType()
Task.Type	getType()
String	toJson() Gets a JSON representation of this task.

Methods inherited from class org.apache.ambari.server.stack.upgrade.ServerSideActionTask

getImplementationClass, getParameters, setImplClass

Methods inherited from class org.apache.ambari.server.stack.upgrade.Task

getSummary, toString

Methods inherited from class java.lang.Object

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

Field Detail

PARAMETER_SERIALIZED_ADD_COMPONENT_TASK

public static final String PARAMETER_SERIALIZED_ADD_COMPONENT_TASK

The key which represents this task serialized.

See Also:

Constant Field Values

hosts

public ExecuteHostType hosts

The hosts to run the task on. Default to running on ExecuteHostType.ANY.

service

public String service

The service which owns the component to add.

component

public String component

The component to add.

hostService

public String hostService

Specifies the hosts which are valid for adding the new component, restricted by service.

hostComponent

public String hostComponent

Specifies the hosts which are valid for adding teh new component, restricted by component.

Constructor Detail

AddComponentTask

public AddComponentTask()

Constructor.

Method Detail

getType

public Task.Type getType()

Specified by:

getType in class Task

Returns:

the type of the task

getStageWrapperType

public StageWrapper.Type getStageWrapperType()

Specified by:

getStageWrapperType in class Task

Returns:

when a single Task is constructed, this is the type of stage it should belong to.

getActionVerb

public String getActionVerb()

Overrides:

getActionVerb in class ServerSideActionTask

Returns:

a verb to display that describes the type of task, e.g., "executing".

toJson

public String toJson()

Gets a JSON representation of this task.

Returns:

a JSON representation of this task.

getServiceAndComponentAsString

public String getServiceAndComponentAsString()

Gets a string which is comprised of serviceName/componentName

Returns:

a string which represents this add component task.