| /* |
| * 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.accumulo.manager.tableOps.create; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import java.io.IOException; |
| import java.util.SortedSet; |
| import java.util.TreeSet; |
| |
| import org.apache.accumulo.core.Constants; |
| import org.apache.accumulo.fate.Repo; |
| import org.apache.accumulo.manager.Manager; |
| import org.apache.accumulo.manager.tableOps.ManagerRepo; |
| import org.apache.accumulo.manager.tableOps.TableInfo; |
| import org.apache.accumulo.manager.tableOps.Utils; |
| import org.apache.accumulo.server.tablets.UniqueNameAllocator; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.Text; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| class ChooseDir extends ManagerRepo { |
| private static final long serialVersionUID = 1L; |
| |
| private final TableInfo tableInfo; |
| private static final Logger log = LoggerFactory.getLogger(ChooseDir.class); |
| |
| ChooseDir(TableInfo ti) { |
| this.tableInfo = ti; |
| } |
| |
| @Override |
| public long isReady(long tid, Manager environment) { |
| return 0; |
| } |
| |
| @Override |
| public Repo<Manager> call(long tid, Manager manager) throws Exception { |
| if (tableInfo.getInitialSplitSize() > 0) { |
| createTableDirectoriesInfo(manager); |
| } |
| return new PopulateMetadata(tableInfo); |
| } |
| |
| @Override |
| public void undo(long tid, Manager manager) throws Exception { |
| // Clean up split files if ChooseDir operation fails |
| Path p = null; |
| try { |
| if (tableInfo.getInitialSplitSize() > 0) { |
| p = tableInfo.getSplitDirsPath(); |
| FileSystem fs = p.getFileSystem(manager.getContext().getHadoopConf()); |
| fs.delete(p, true); |
| } |
| } catch (IOException e) { |
| log.error("Failed to undo ChooseDir operation and failed to clean up split files at {}", p, |
| e); |
| } |
| } |
| |
| /** |
| * Create unique table directory names that will be associated with split values. Then write these |
| * to the file system for later use during this FATE operation. |
| */ |
| private void createTableDirectoriesInfo(Manager manager) throws IOException { |
| SortedSet<Text> splits = Utils.getSortedSetFromFile(manager, tableInfo.getSplitPath(), true); |
| SortedSet<Text> tabletDirectoryInfo = createTabletDirectoriesSet(manager, splits.size()); |
| writeTabletDirectoriesToFileSystem(manager, tabletDirectoryInfo); |
| } |
| |
| /** |
| * Create a set of unique table directories. These will be associated with splits in a follow-on |
| * FATE step. |
| */ |
| private static SortedSet<Text> createTabletDirectoriesSet(Manager manager, int num) { |
| String tabletDir; |
| UniqueNameAllocator namer = manager.getContext().getUniqueNameAllocator(); |
| SortedSet<Text> splitDirs = new TreeSet<>(); |
| for (int i = 0; i < num; i++) { |
| tabletDir = Constants.GENERATED_TABLET_DIRECTORY_PREFIX + namer.getNextName(); |
| splitDirs.add(new Text(tabletDir)); |
| } |
| return splitDirs; |
| } |
| |
| /** |
| * Write the SortedSet of Tablet Directory names to the file system for use in the next phase of |
| * the FATE operation. |
| */ |
| private void writeTabletDirectoriesToFileSystem(Manager manager, SortedSet<Text> dirs) |
| throws IOException { |
| Path p = tableInfo.getSplitDirsPath(); |
| FileSystem fs = p.getFileSystem(manager.getContext().getHadoopConf()); |
| if (fs.exists(p)) |
| fs.delete(p, true); |
| try (FSDataOutputStream stream = fs.create(p)) { |
| for (Text dir : dirs) |
| stream.write((dir + "\n").getBytes(UTF_8)); |
| } |
| } |
| |
| } |