| /* |
| * 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.graph.partition; |
| |
| import org.apache.giraph.graph.WorkerInfo; |
| import org.apache.hadoop.io.Writable; |
| |
| /** |
| * Metadata about ownership of a partition. |
| */ |
| public interface PartitionOwner extends Writable { |
| /** |
| * Get the partition id that maps to the relevant {@link Partition} object |
| * |
| * @return Partition id |
| */ |
| int getPartitionId(); |
| |
| /** |
| * Get the worker information that is currently responsible for |
| * the partition id. |
| * |
| * @return Owning worker information. |
| */ |
| WorkerInfo getWorkerInfo(); |
| |
| /** |
| * Set the current worker info. |
| * |
| * @param workerInfo Worker info responsible for partition |
| */ |
| void setWorkerInfo(WorkerInfo workerInfo); |
| |
| /** |
| * Get the worker information that was previously responsible for the |
| * partition id. |
| * |
| * @return Owning worker information or null if no previous worker info. |
| */ |
| WorkerInfo getPreviousWorkerInfo(); |
| |
| /** |
| * Set the previous worker info. |
| * |
| * @param workerInfo Worker info that was previously responsible for the |
| * partition. |
| */ |
| void setPreviousWorkerInfo(WorkerInfo workerInfo); |
| |
| /** |
| * If this is a restarted checkpoint, the worker will use this information |
| * to determine where the checkpointed partition was stored on HDFS. |
| * |
| * @return Prefix of the checkpoint HDFS files for this partition, null if |
| * this is not a restarted superstep. |
| */ |
| String getCheckpointFilesPrefix(); |
| |
| /** |
| * Set the checkpoint files prefix. Master uses this. |
| * |
| * @param checkpointFilesPrefix HDFS checkpoint file prefix |
| */ |
| void setCheckpointFilesPrefix(String checkpointFilesPrefix); |
| } |