Package org.apache.jackrabbit.oak.commons.jmx

Class ManagementOperation<R>

java.lang.Object

java.util.concurrent.FutureTask<R>

org.apache.jackrabbit.oak.commons.jmx.ManagementOperation<R>

All Implemented Interfaces:

Runnable, Future<R>, RunnableFuture<R>

public class ManagementOperation<R>
extends FutureTask<R>

A ManagementOperation is a background task, which can be executed by an Executor. Its ManagementOperation.Status indicates whether execution has already been started, is currently under the way or has already finished.

See Also:

• RepositoryManagementMBean

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	ManagementOperation.Status	Status of a ManagementOperation.

Nested classes/interfaces inherited from interface java.util.concurrent.Future

Future.State

Method Summary

Modifier and Type	Method	Description
static <R> @NotNull ManagementOperation<R>	done(String name, R result)	An operation that is already done with the given value.
int	getId()	Each instance of a ManagementOperation has an unique id associated with it.
@NotNull String	getName()	Informal name
@NotNull ManagementOperation.Status	getStatus()	The status of this operation: running if the operation is currently being executed. succeeded if the operation has terminated without errors. failed if the operation has been cancelled, its thread has been interrupted during execution or the operation has failed with an exception.
static <R> ManagementOperation<R>	newManagementOperation(@NotNull String name, @NotNull Callable<R> task)	Create a new ManagementOperation of the given name.
static <R> ManagementOperation<R>	newManagementOperation(@NotNull String name, @NotNull Supplier<String> statusMessage, @NotNull Callable<R> task)	Create a new ManagementOperation of the given name.
String	toString()

Methods inherited from class java.util.concurrent.FutureTask

cancel, exceptionNow, get, get, isCancelled, isDone, resultNow, run, state

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Details

newManagementOperation

public static <R> ManagementOperation<R> newManagementOperation(@NotNull
 @NotNull String name,
 @NotNull
 @NotNull Callable<R> task)

Create a new ManagementOperation of the given name. The name is an informal value attached to this instance.

Parameters:

name - informal name

task - task to execute for this operation

newManagementOperation

public static <R> ManagementOperation<R> newManagementOperation(@NotNull
 @NotNull String name,
 @NotNull
 @NotNull Supplier<String> statusMessage,
 @NotNull
 @NotNull Callable<R> task)

Create a new ManagementOperation of the given name. The name is an informal value attached to this instance.

Parameters:

name - informal name

statusMessage - an informal status message describing the status of the background operation at the time of invocation.

task - task to execute for this operation

done

@NotNull
public static <R> @NotNull ManagementOperation<R> done(String name,
 R result)

An operation that is already done with the given value.

Parameters:

name - name of the operation

result - result returned by the operation

Returns:

a ManagementOperation instance that is already done.

getId

public int getId()

Each instance of a ManagementOperation has an unique id associated with it. This id is returned as a part of its status

Returns:

id of this operation

getName

@NotNull
public @NotNull String getName()

Informal name

Returns:

name of this operation

getStatus

@NotNull
public @NotNull ManagementOperation.Status getStatus()

The status of this operation:

• running if the operation is currently being executed.
• succeeded if the operation has terminated without errors.
• failed if the operation has been cancelled, its thread has been interrupted during execution or the operation has failed with an exception.

Returns:

the current status of this operation

toString

public String toString()

Overrides:

toString in class FutureTask<R>