| /* |
| * 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.batchee.container.services.callback; |
| |
| import org.apache.batchee.container.exception.BatchContainerRuntimeException; |
| import org.apache.batchee.container.impl.jobinstance.RuntimeJobExecution; |
| import org.apache.batchee.spi.JobExecutionCallbackService; |
| import org.apache.batchee.util.Batches; |
| |
| import java.util.Collection; |
| import java.util.Properties; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.batch.operations.JobOperator; |
| import javax.batch.runtime.JobExecution; |
| |
| public class SimpleJobExecutionCallbackService implements JobExecutionCallbackService { |
| private final ConcurrentMap<Long, Collection<CountDownLatch>> waiters = new ConcurrentHashMap<Long, Collection<CountDownLatch>>(); |
| |
| @Override |
| public void onJobExecutionDone(final RuntimeJobExecution jobExecution) { |
| final Collection<CountDownLatch> toRealease = waiters.remove(jobExecution.getExecutionId()); |
| if (toRealease != null) { |
| for (final CountDownLatch latch : toRealease) { |
| latch.countDown(); |
| } |
| } |
| } |
| |
| @Override |
| public void waitFor(final JobOperator jobOperator, final long id) { |
| Collection<CountDownLatch> toRelease = waiters.get(id); |
| if (toRelease == null) { |
| toRelease = new CopyOnWriteArrayList<CountDownLatch>(); |
| final Collection<CountDownLatch> existing = waiters.putIfAbsent(id, toRelease); |
| if (existing != null) { |
| toRelease = existing; |
| } |
| } |
| if (checkIsDone(jobOperator, id)) { |
| return; |
| } |
| |
| final CountDownLatch latch = new CountDownLatch(1); |
| toRelease.add(latch); |
| try { |
| while (!latch.await(1, TimeUnit.SECONDS)) { |
| if (checkIsDone(jobOperator, id)) { |
| return; |
| } |
| } |
| waiters.remove(id); |
| } catch (final InterruptedException e) { |
| throw new BatchContainerRuntimeException(e); |
| } |
| } |
| |
| @Override |
| public void init(final Properties batchConfig) { |
| // no-op |
| } |
| |
| private boolean checkIsDone(final JobOperator jobOperator, final long id) { |
| // check before blocking |
| final JobExecution finalCheckExec = jobOperator.getJobExecution(id); |
| if (finalCheckExec != null && Batches.isDone(finalCheckExec.getBatchStatus())) { |
| waiters.remove(id); |
| return true; |
| } |
| return false; |
| } |
| } |