org.apache.hadoop.hbase.client

类 ResultBoundedCompletionService<V>

java.lang.Object

org.apache.hadoop.hbase.client.ResultBoundedCompletionService<V>

@InterfaceAudience.Private
public class ResultBoundedCompletionService<V>
extends Object

A completion service for the RpcRetryingCallerFactory. Keeps the list of the futures, and allows to cancel them all. This means as well that it can be used for a small set of tasks only.
Implementation is not Thread safe. CompletedTasks is implemented as a queue, the entry is added based on the time order. I.e, when the first task completes (whether it is a success or failure), it is added as a first entry in the queue, the next completed task is added as a second entry in the queue, ... When iterating through the queue, we know it is based on time order. If the first completed task succeeds, it is returned. If it is failure, the iteration goes on until it finds a success.

构造器概要

构造器

构造器和说明
ResultBoundedCompletionService(RpcRetryingCallerFactory retryingCallerFactory, Executor executor, int maxTasks)

方法概要

方法

限定符和类型	方法和说明
void	cancelAll()
org.apache.hadoop.hbase.client.ResultBoundedCompletionService.QueueingFuture<V>	poll(long timeout, TimeUnit unit) Poll for the first completed task whether it is a success or execution exception.
org.apache.hadoop.hbase.client.ResultBoundedCompletionService.QueueingFuture<V>	pollForFirstSuccessfullyCompletedTask(long timeout, TimeUnit unit, int startIndex, int endIndex) Poll for the first successfully completed task whose completed order is in startIndex, endIndex(exclusive) range
void	submit(RetryingCallable<V> task, int callTimeout, int id)
org.apache.hadoop.hbase.client.ResultBoundedCompletionService.QueueingFuture<V>	take()

从类继承的方法 java.lang.Object

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

构造器详细资料

ResultBoundedCompletionService

public ResultBoundedCompletionService(RpcRetryingCallerFactory retryingCallerFactory,
                              Executor executor,
                              int maxTasks)

方法详细资料

submit

public void submit(RetryingCallable<V> task,
          int callTimeout,
          int id)

take

public org.apache.hadoop.hbase.client.ResultBoundedCompletionService.QueueingFuture<V> take()
                                                                                     throws InterruptedException

抛出:

InterruptedException

poll

public org.apache.hadoop.hbase.client.ResultBoundedCompletionService.QueueingFuture<V> poll(long timeout,
                                                                                   TimeUnit unit)
                                                                                     throws InterruptedException

Poll for the first completed task whether it is a success or execution exception.

参数:

timeout - - time to wait before it times out

unit - - time unit for timeout

抛出:

InterruptedException

pollForFirstSuccessfullyCompletedTask

public org.apache.hadoop.hbase.client.ResultBoundedCompletionService.QueueingFuture<V> pollForFirstSuccessfullyCompletedTask(long timeout,
                                                                                                                    TimeUnit unit,
                                                                                                                    int startIndex,
                                                                                                                    int endIndex)
                                                                                                                      throws InterruptedException,
                                                                                                                             CancellationException,
                                                                                                                             ExecutionException

Poll for the first successfully completed task whose completed order is in startIndex, endIndex(exclusive) range

参数:

timeout - - time to wait before it times out

unit - - time unit for timeout

startIndex - - start index, starting from 0, inclusive

endIndex - - end index, exclusive

返回:

If within timeout time, there is no successfully completed task, return null; If all tasks get execution exception, it will throw out the last execution exception, otherwise return the first successfully completed task's result.

抛出:

InterruptedException

CancellationException

ExecutionException

cancelAll

public void cancelAll()