/* * Copyright (c) 2011-2014 Pivotal Software, Inc. * * Licensed 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.camunda.bpm.extension.reactor.projectreactor.dispatch.wait; import com.lmax.disruptor.AlertException; import com.lmax.disruptor.Sequence; import com.lmax.disruptor.SequenceBarrier; import com.lmax.disruptor.TimeoutException; import com.lmax.disruptor.WaitStrategy; import java.util.concurrent.locks.LockSupport; /** * @author Jon Brisbin */ public class ParkWaitStrategy implements WaitStrategy { private final long parkFor; public ParkWaitStrategy() { this(250); } public ParkWaitStrategy(long parkFor) { this.parkFor = parkFor; } @Override public long waitFor(long sequence, Sequence cursor, Sequence dependentSequence, SequenceBarrier barrier) throws AlertException, InterruptedException, TimeoutException { long availableSequence; while ((availableSequence = dependentSequence.get()) < sequence) { barrier.checkAlert(); LockSupport.parkNanos(parkFor); } return availableSequence; } @Override public void signalAllWhenBlocking() { } }