| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.blur.command; |
| |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import org.apache.blur.thrift.generated.CommandStatus; |
| |
| public class ResponseFuture<T> implements Future<T> { |
| |
| private final Future<T> _future; |
| private final AtomicLong _timeWhenNotRunningObserved = new AtomicLong(); |
| private final long _tombstone; |
| private final Command<?> _commandExecuting; |
| private final CommandStatus _originalCommandStatusObject; |
| private final AtomicBoolean _running; |
| |
| public ResponseFuture(long tombstone, Future<T> future, Command<?> commandExecuting, |
| CommandStatus originalCommandStatusObject, AtomicBoolean running) { |
| _tombstone = tombstone; |
| _future = future; |
| _commandExecuting = commandExecuting; |
| _originalCommandStatusObject = originalCommandStatusObject; |
| _running = running; |
| } |
| |
| public CommandStatus getOriginalCommandStatusObject() { |
| return _originalCommandStatusObject; |
| } |
| |
| public Command<?> getCommandExecuting() { |
| return _commandExecuting; |
| } |
| |
| public boolean cancel(boolean mayInterruptIfRunning) { |
| _running.set(false); |
| return _future.cancel(mayInterruptIfRunning); |
| } |
| |
| public boolean isCancelled() { |
| return _future.isCancelled(); |
| } |
| |
| public boolean isDone() { |
| return _future.isDone(); |
| } |
| |
| public T get() throws InterruptedException, ExecutionException { |
| return _future.get(); |
| } |
| |
| public T get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException { |
| return _future.get(timeout, unit); |
| } |
| |
| public boolean isRunning() { |
| if (isDone() || isCancelled()) { |
| _timeWhenNotRunningObserved.compareAndSet(0, System.currentTimeMillis()); |
| return false; |
| } |
| return true; |
| } |
| |
| public boolean hasExpired() { |
| long timeWhenNotRunningObserved = _timeWhenNotRunningObserved.get(); |
| if (timeWhenNotRunningObserved + _tombstone < System.currentTimeMillis()) { |
| return true; |
| } |
| return false; |
| } |
| |
| } |