| /* |
| * 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.jackrabbit.oak.segment.aws; |
| |
| import java.io.IOException; |
| import java.util.Optional; |
| import java.util.concurrent.TimeUnit; |
| |
| import com.amazonaws.services.dynamodbv2.AcquireLockOptions; |
| import com.amazonaws.services.dynamodbv2.AmazonDynamoDBLockClient; |
| import com.amazonaws.services.dynamodbv2.LockItem; |
| |
| import org.apache.jackrabbit.oak.segment.spi.persistence.RepositoryLock; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class AwsRepositoryLock implements RepositoryLock { |
| |
| private static final Logger log = LoggerFactory.getLogger(AwsRepositoryLock.class); |
| |
| private static final int TIMEOUT_SEC = Integer.getInteger("oak.segment.aws.lock.timeout", 0); |
| |
| private static final long INTERVAL = 60; |
| |
| private final AmazonDynamoDBLockClient lockClient; |
| private final String lockName; |
| private final long timeoutSec; |
| |
| private LockItem lockItem; |
| |
| public AwsRepositoryLock(DynamoDBClient dynamoDBClient, String lockName) { |
| this(dynamoDBClient, lockName, TIMEOUT_SEC); |
| } |
| |
| public AwsRepositoryLock(DynamoDBClient dynamoDBClient, String lockName, int timeoutSec) { |
| this.lockClient = new AmazonDynamoDBLockClient( |
| dynamoDBClient.getLockClientOptionsBuilder().withTimeUnit(TimeUnit.SECONDS).withLeaseDuration(INTERVAL) |
| .withHeartbeatPeriod(INTERVAL / 3).withCreateHeartbeatBackgroundThread(true).build()); |
| this.lockName = lockName; |
| this.timeoutSec = timeoutSec; |
| } |
| |
| public AwsRepositoryLock lock() throws IOException { |
| try { |
| Optional<LockItem> lockItemOptional = lockClient.tryAcquireLock(AcquireLockOptions.builder(lockName) |
| .withTimeUnit(TimeUnit.SECONDS).withAdditionalTimeToWaitForLock(timeoutSec) |
| .build()); |
| if (lockItemOptional.isPresent()) { |
| lockItem = lockItemOptional.get(); |
| return this; |
| } else { |
| log.error("Can't acquire the lease in {}s.", timeoutSec); |
| throw new IOException("Can't acquire the lease in " + timeoutSec + "s."); |
| } |
| } catch (InterruptedException e) { |
| throw new IOException(e); |
| } |
| } |
| |
| @Override |
| public void unlock() { |
| lockClient.releaseLock(lockItem); |
| } |
| } |