org.apache.flink.runtime.checkpoint.ZooKeeperCheckpointStoreUtil Maven / Gradle / Ivy
/*
* 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.flink.runtime.checkpoint;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/** Singleton {@link CheckpointStoreUtil} implementation for ZooKeeper. */
public enum ZooKeeperCheckpointStoreUtil implements CheckpointStoreUtil {
INSTANCE;
private static final Logger LOG = LoggerFactory.getLogger(ZooKeeperCheckpointStoreUtil.class);
/**
* Convert a checkpoint id into a ZooKeeper path.
*
* @param checkpointId to convert to the path
* @return Path created from the given checkpoint id
*/
@Override
public String checkpointIDToName(long checkpointId) {
return String.format("/%019d", checkpointId);
}
/**
* Converts a path to the checkpoint id.
*
* @param path in ZooKeeper
* @return Checkpoint id parsed from the path
*/
@Override
public long nameToCheckpointID(String path) {
try {
String numberString;
// check if we have a leading slash
if ('/' == path.charAt(0)) {
numberString = path.substring(1);
} else {
numberString = path;
}
return Long.parseLong(numberString);
} catch (NumberFormatException e) {
LOG.warn(
"Could not parse checkpoint id from {}. This indicates that the "
+ "checkpoint id to path conversion has changed.",
path);
return INVALID_CHECKPOINT_ID;
}
}
}