eu.stratosphere.nephele.jobgraph.JobID Maven / Gradle / Ivy
/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.nephele.jobgraph;
import javax.xml.bind.DatatypeConverter;
import eu.stratosphere.nephele.io.AbstractID;
/**
* A class for statistically unique job IDs.
*
* This class is thread-safe.
*
*/
public final class JobID extends AbstractID {
/**
* Constructs a new random ID from a uniform distribution.
*/
public JobID() {
super();
}
/**
* Constructs a new job ID.
*
* @param lowerPart
* the lower bytes of the ID
* @param upperPart
* the higher bytes of the ID
*/
private JobID(final long lowerPart, final long upperPart) {
super(lowerPart, upperPart);
}
/**
* Constructs a new job ID from the given bytes.
*
* @param bytes
* the bytes to initialize the job ID with
*/
public JobID(final byte[] bytes) {
super(bytes);
}
/**
* Generates a new statistically unique job ID.
*
* @return a new statistically unique job ID
*/
public static JobID generate() {
final long lowerPart = AbstractID.generateRandomBytes();
final long upperPart = AbstractID.generateRandomBytes();
return new JobID(lowerPart, upperPart);
}
/**
* Constructs a new job ID and initializes it with the given bytes.
*
* @param bytes
* the bytes to initialize the new job ID with
* @return the new job ID
*/
public static JobID fromByteArray(final byte[] bytes) {
return new JobID(bytes);
}
/**
* Constructs a new job ID and initializes it with the given bytes.
*
* @param bytes
* the bytes to initialize the new job ID with
* @return the new job ID
*/
public static JobID fromHexString(final String hexString) {
return new JobID(DatatypeConverter.parseHexBinary(hexString));
}
}