| /* |
| * 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.asterix.common.storage; |
| |
| import java.io.File; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| import org.apache.asterix.common.utils.StorageConstants; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.hyracks.storage.am.lsm.common.impls.IndexComponentFileReference; |
| |
| public class ResourceReference { |
| |
| protected final String root; |
| protected final String partition; |
| protected final String dataverse; // == DataverseName.getCanonicalForm() |
| protected final String dataset; |
| protected final String rebalance; |
| protected final String index; |
| protected final String name; |
| private volatile Path relativePath; |
| |
| protected ResourceReference(String path) { |
| // format: root/partition/dataverse/dataset/rebalanceCount/index/fileName |
| final String[] tokens = StringUtils.split(path, File.separatorChar); |
| if (tokens.length < 6) { |
| throw new IllegalStateException("Unrecognized path structure: " + path); |
| } |
| int offset = tokens.length; |
| name = tokens[--offset]; |
| index = tokens[--offset]; |
| rebalance = tokens[--offset]; |
| dataset = tokens[--offset]; |
| dataverse = tokens[--offset]; //TODO(MULTI_PART_DATAVERSE_NAME):REVISIT |
| partition = tokens[--offset]; |
| root = tokens[--offset]; |
| } |
| |
| public static ResourceReference ofIndex(String indexPath) { |
| return of(new File(indexPath, StorageConstants.METADATA_FILE_NAME).toString()); |
| } |
| |
| public static ResourceReference of(String localResourcePath) { |
| return new ResourceReference(localResourcePath); |
| } |
| |
| public String getPartition() { |
| return partition; |
| } |
| |
| public String getDataverse() { //TODO(MULTI_PART_DATAVERSE_NAME):REVISIT |
| return dataverse; |
| } |
| |
| public String getDataset() { |
| return dataset; |
| } |
| |
| public String getRebalance() { |
| return rebalance; |
| } |
| |
| public String getIndex() { |
| return index; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public Path getRelativePath() { |
| if (relativePath == null) { |
| relativePath = Paths.get(root, partition, dataverse, dataset, rebalance, index); |
| } |
| return relativePath; |
| } |
| |
| public ResourceReference getDatasetReference() { |
| return ResourceReference |
| .ofIndex(Paths.get(root, partition, dataverse, dataset, rebalance, dataset).toFile().getPath()); |
| } |
| |
| public Path getFileRelativePath() { |
| return Paths.get(root, partition, dataverse, dataset, rebalance, index, name); |
| } |
| |
| public int getPartitionNum() { |
| return Integer.parseInt(partition.substring(StorageConstants.PARTITION_DIR_PREFIX.length())); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o instanceof ResourceReference) { |
| ResourceReference that = (ResourceReference) o; |
| return getRelativePath().equals(that.getRelativePath()); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return getRelativePath().hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return getRelativePath().toString(); |
| } |
| |
| /** |
| * Gets a component sequence based on its unique timestamp. |
| * e.g. a component file 1_3_b |
| * will return a component sequence 1_3 |
| * |
| * @param componentFile any component file |
| * @return The component sequence |
| */ |
| public static String getComponentSequence(String componentFile) { |
| final ResourceReference ref = of(componentFile); |
| return IndexComponentFileReference.of(ref.getName()).getSequence(); |
| } |
| } |