/*
* 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.giraph.partition;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Map;
import org.apache.giraph.conf.ImmutableClassesGiraphConfigurable;
import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
import org.apache.giraph.worker.WorkerInfo;
/**
* Basic partition owner, can be subclassed for more complicated partition
* owner implementations.
*/
public class BasicPartitionOwner implements PartitionOwner,
ImmutableClassesGiraphConfigurable {
/** Configuration */
private ImmutableClassesGiraphConfiguration conf;
/** Partition id */
private int partitionId = -1;
/** Owning worker information */
private WorkerInfo workerInfo;
/** Previous (if any) worker info */
private WorkerInfo previousWorkerInfo;
/** Checkpoint files prefix for this partition */
private String checkpointFilesPrefix;
/**
* Default constructor.
*/
public BasicPartitionOwner() { }
/**
* Constructor with partition id and worker info.
*
* @param partitionId Partition id of this partition.
* @param workerInfo Owner of the partition.
*/
public BasicPartitionOwner(int partitionId, WorkerInfo workerInfo) {
this(partitionId, workerInfo, null, null);
}
/**
* Constructor with partition id and worker info.
*
* @param partitionId Partition id of this partition.
* @param workerInfo Owner of the partition.
* @param previousWorkerInfo Previous owner of this partition.
* @param checkpointFilesPrefix Prefix of the checkpoint files.
*/
public BasicPartitionOwner(int partitionId,
WorkerInfo workerInfo,
WorkerInfo previousWorkerInfo,
String checkpointFilesPrefix) {
this.partitionId = partitionId;
this.workerInfo = workerInfo;
this.previousWorkerInfo = previousWorkerInfo;
this.checkpointFilesPrefix = checkpointFilesPrefix;
}
@Override
public int getPartitionId() {
return partitionId;
}
@Override
public WorkerInfo getWorkerInfo() {
return workerInfo;
}
@Override
public void setWorkerInfo(WorkerInfo workerInfo) {
this.workerInfo = workerInfo;
}
@Override
public WorkerInfo getPreviousWorkerInfo() {
return previousWorkerInfo;
}
@Override
public void setPreviousWorkerInfo(WorkerInfo workerInfo) {
this.previousWorkerInfo = workerInfo;
}
@Override
public String getCheckpointFilesPrefix() {
return checkpointFilesPrefix;
}
@Override
public void setCheckpointFilesPrefix(String checkpointFilesPrefix) {
this.checkpointFilesPrefix = checkpointFilesPrefix;
}
@Override
public void writeWithWorkerIds(DataOutput output) throws IOException {
output.writeInt(partitionId);
output.writeInt(workerInfo.getTaskId());
if (previousWorkerInfo != null) {
output.writeInt(previousWorkerInfo.getTaskId());
} else {
output.writeInt(-1);
}
if (checkpointFilesPrefix != null) {
output.writeBoolean(true);
output.writeUTF(checkpointFilesPrefix);
} else {
output.writeBoolean(false);
}
}
@Override
public void readFieldsWithWorkerIds(DataInput input,
Map<Integer, WorkerInfo> workerInfoMap) throws IOException {
partitionId = input.readInt();
int workerId = input.readInt();
workerInfo = workerInfoMap.get(workerId);
int previousWorkerId = input.readInt();
if (previousWorkerId != -1) {
previousWorkerInfo = workerInfoMap.get(previousWorkerId);
}
boolean hasCheckpointFilePrefix = input.readBoolean();
if (hasCheckpointFilePrefix) {
checkpointFilesPrefix = input.readUTF();
}
}
@Override
public void readFields(DataInput input) throws IOException {
partitionId = input.readInt();
workerInfo = new WorkerInfo();
workerInfo.readFields(input);
boolean hasPreviousWorkerInfo = input.readBoolean();
if (hasPreviousWorkerInfo) {
previousWorkerInfo = new WorkerInfo();
previousWorkerInfo.readFields(input);
}
boolean hasCheckpointFilePrefix = input.readBoolean();
if (hasCheckpointFilePrefix) {
checkpointFilesPrefix = input.readUTF();
}
}
@Override
public void write(DataOutput output) throws IOException {
output.writeInt(partitionId);
workerInfo.write(output);
if (previousWorkerInfo != null) {
output.writeBoolean(true);
previousWorkerInfo.write(output);
} else {
output.writeBoolean(false);
}
if (checkpointFilesPrefix != null) {
output.writeBoolean(true);
output.writeUTF(checkpointFilesPrefix);
} else {
output.writeBoolean(false);
}
}
@Override
public ImmutableClassesGiraphConfiguration getConf() {
return conf;
}
@Override
public void setConf(ImmutableClassesGiraphConfiguration conf) {
this.conf = conf;
}
@Override
public String toString() {
return "(id=" + partitionId + ",cur=" + workerInfo + ",prev=" +
previousWorkerInfo + ",ckpt_file=" + checkpointFilesPrefix + ")";
}
}