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Lineage.java
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Lineage.java
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/*
* Licensed to the University of California, Berkeley 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 tachyon.master.lineage.meta;
import java.util.Collections;
import java.util.List;
import com.google.common.base.Preconditions;
import tachyon.client.file.TachyonFile;
import tachyon.job.Job;
/**
* A lineage tracks the dependencies imposed by a job, including the input files the job depends on,
* and the output files the job generates.
*/
public final class Lineage {
private final long mId;
private final List<TachyonFile> mInputFiles;
private final List<LineageFile> mOutputFiles;
private final Job mJob;
private LineageState mState;
/**
* Creates a new lineage. The state will be initialized to ADDED.
*
* @param inputFiles the input files.
* @param outputFiles the output files.
* @param job the job
*/
public Lineage(List<TachyonFile> inputFiles, List<LineageFile> outputFiles, Job job) {
mInputFiles = Preconditions.checkNotNull(inputFiles);
mOutputFiles = Preconditions.checkNotNull(outputFiles);
mJob = Preconditions.checkNotNull(job);
mState = LineageState.ADDED;
mId = LineageIdGenerator.generateId();
}
public List<TachyonFile> getInputFiles() {
return Collections.unmodifiableList(mInputFiles);
}
public List<LineageFile> getOutputFiles() {
return Collections.unmodifiableList(mOutputFiles);
}
public Job getJob() {
return mJob;
}
public LineageState getState() {
return mState;
}
public void setState(LineageState newState) {
mState = newState;
}
public long getId() {
return mId;
}
}