org.apache.hadoop.util.functional

Class TaskPool.Builder<I>

java.lang.Object

org.apache.hadoop.util.functional.TaskPool.Builder<I>

Type Parameters:

I - item type

Enclosing class:

org.apache.hadoop.util.functional.TaskPool

public static class TaskPool.Builder<I>
extends Object

Builder for task execution.

Method Summary

Modifier and Type	Method and Description
TaskPool.Builder<I>	abortWith(TaskPool.Task<I,?> task) Task to abort with after another task failed.
TaskPool.Builder<I>	executeWith(TaskPool.Submitter submitter) Declare executor service: if null, the tasks are executed in a single thread.
TaskPool.Builder<I>	onFailure(TaskPool.FailureTask<I,?> task) Task to invoke on failure.
TaskPool.Builder<I>	revertWith(TaskPool.Task<I,?> task) Task to revert with after another task failed.
<E extends Exception> boolean	run(TaskPool.Task<I,E> task) Execute the task across the data.
TaskPool.Builder<I>	sleepInterval(int value) Set the sleep interval.
TaskPool.Builder<I>	stopAbortsOnFailure() Stop trying to abort if one operation fails.
TaskPool.Builder<I>	stopOnFailure()
TaskPool.Builder<I>	stopRevertsOnFailure() Stop trying to revert if one operation fails.
TaskPool.Builder<I>	suppressExceptions() Suppress exceptions from tasks.
TaskPool.Builder<I>	suppressExceptions(boolean suppress) Suppress exceptions from tasks.

Methods inherited from class java.lang.Object

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

Method Detail

executeWith

public TaskPool.Builder<I> executeWith(@Nullable
                                       TaskPool.Submitter submitter)

Declare executor service: if null, the tasks are executed in a single thread.

Parameters:

submitter - service to schedule tasks with.

Returns:

this builder.

onFailure

public TaskPool.Builder<I> onFailure(TaskPool.FailureTask<I,?> task)

Task to invoke on failure.

Parameters:

task - task

Returns:

the builder

stopOnFailure

public TaskPool.Builder<I> stopOnFailure()

suppressExceptions

public TaskPool.Builder<I> suppressExceptions()

Suppress exceptions from tasks. RemoteIterator exceptions are not suppressable.

Returns:

the builder.

suppressExceptions

public TaskPool.Builder<I> suppressExceptions(boolean suppress)

Suppress exceptions from tasks. RemoteIterator exceptions are not suppressable.

Parameters:

suppress - new value

Returns:

the builder.

revertWith

public TaskPool.Builder<I> revertWith(TaskPool.Task<I,?> task)

Task to revert with after another task failed.

Parameters:

task - task to execute

Returns:

the builder

stopRevertsOnFailure

public TaskPool.Builder<I> stopRevertsOnFailure()

Stop trying to revert if one operation fails.

Returns:

the builder

abortWith

public TaskPool.Builder<I> abortWith(TaskPool.Task<I,?> task)

Task to abort with after another task failed.

Parameters:

task - task to execute

Returns:

the builder

stopAbortsOnFailure

public TaskPool.Builder<I> stopAbortsOnFailure()

Stop trying to abort if one operation fails.

Returns:

the builder

sleepInterval

public TaskPool.Builder<I> sleepInterval(int value)

Set the sleep interval.

Parameters:

value - new value

Returns:

the builder

run

public <E extends Exception> boolean run(TaskPool.Task<I,E> task)
                                  throws E extends Exception,
                                         IOException

Execute the task across the data.

Type Parameters:

E - exception which may be raised in execution.

Parameters:

task - task to execute

Returns:

true if the operation executed successfully

Throws:

E - any exception raised.

IOException - IOExceptions raised by remote iterator or in execution.

E extends Exception