| /* |
| * 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.hadoop.ozone.debug; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| |
| import org.apache.hadoop.hdds.cli.SubcommandWithParent; |
| import org.apache.hadoop.hdds.utils.db.DBColumnFamilyDefinition; |
| import org.apache.hadoop.hdds.utils.db.DBDefinition; |
| import org.apache.hadoop.ozone.OzoneConsts; |
| |
| import com.google.gson.Gson; |
| import com.google.gson.GsonBuilder; |
| import org.kohsuke.MetaInfServices; |
| import org.rocksdb.ColumnFamilyDescriptor; |
| import org.rocksdb.ColumnFamilyHandle; |
| import org.rocksdb.RocksDB; |
| import org.rocksdb.RocksIterator; |
| import picocli.CommandLine; |
| |
| /** |
| * Parser for scm.db file. |
| */ |
| @CommandLine.Command( |
| name = "scan", |
| description = "Parse specified metadataTable" |
| ) |
| @MetaInfServices(SubcommandWithParent.class) |
| public class DBScanner implements Callable<Void>, SubcommandWithParent { |
| |
| @CommandLine.Option(names = {"--column_family"}, |
| required = true, |
| description = "Table name") |
| private String tableName; |
| |
| @CommandLine.Option(names = {"--with-keys"}, |
| description = "List Key -> Value instead of just Value.", |
| defaultValue = "false", |
| showDefaultValue = CommandLine.Help.Visibility.ALWAYS) |
| private static boolean withKey; |
| |
| @CommandLine.Option(names = {"--length", "-l"}, |
| description = "Maximum number of items to list") |
| private static int limit = 100; |
| |
| @CommandLine.ParentCommand |
| private RDBParser parent; |
| |
| private HashMap<String, DBColumnFamilyDefinition> columnFamilyMap; |
| |
| private List<Object> scannedObjects; |
| |
| private static List<Object> displayTable(RocksIterator iterator, |
| DBColumnFamilyDefinition dbColumnFamilyDefinition) throws IOException { |
| List<Object> outputs = new ArrayList<>(); |
| iterator.seekToFirst(); |
| while (iterator.isValid() && limit > 0){ |
| StringBuilder result = new StringBuilder(); |
| if (withKey) { |
| Object key = dbColumnFamilyDefinition.getKeyCodec() |
| .fromPersistedFormat(iterator.key()); |
| Gson gson = new GsonBuilder().setPrettyPrinting().create(); |
| result.append(gson.toJson(key)); |
| result.append(" -> "); |
| } |
| Object o = dbColumnFamilyDefinition.getValueCodec() |
| .fromPersistedFormat(iterator.value()); |
| outputs.add(o); |
| Gson gson = new GsonBuilder().setPrettyPrinting().create(); |
| result.append(gson.toJson(o)); |
| System.out.println(result.toString()); |
| limit--; |
| iterator.next(); |
| } |
| return outputs; |
| } |
| |
| public void setTableName(String tableName) { |
| this.tableName = tableName; |
| } |
| |
| public RDBParser getParent() { |
| return parent; |
| } |
| |
| public void setParent(RDBParser parent) { |
| this.parent = parent; |
| } |
| |
| public static void setLimit(int limit) { |
| DBScanner.limit = limit; |
| } |
| |
| public List<Object> getScannedObjects() { |
| return scannedObjects; |
| } |
| |
| private static ColumnFamilyHandle getColumnFamilyHandle( |
| byte[] name, List<ColumnFamilyHandle> columnFamilyHandles) { |
| return columnFamilyHandles |
| .stream() |
| .filter( |
| handle -> { |
| try { |
| return Arrays.equals(handle.getName(), name); |
| } catch (Exception ex) { |
| throw new RuntimeException(ex); |
| } |
| }) |
| .findAny() |
| .orElse(null); |
| } |
| |
| private void constructColumnFamilyMap(DBDefinition dbDefinition) { |
| if (dbDefinition == null){ |
| System.out.println("Incorrect Db Path"); |
| return; |
| } |
| this.columnFamilyMap = new HashMap<>(); |
| DBColumnFamilyDefinition[] columnFamilyDefinitions = dbDefinition |
| .getColumnFamilies(); |
| for (DBColumnFamilyDefinition definition:columnFamilyDefinitions) { |
| System.out.println("Added definition for table:" + |
| definition.getTableName()); |
| this.columnFamilyMap.put(definition.getTableName(), definition); |
| } |
| } |
| |
| @Override |
| public Void call() throws Exception { |
| List<ColumnFamilyDescriptor> cfs = |
| RocksDBUtils.getColumnFamilyDescriptors(parent.getDbPath()); |
| |
| final List<ColumnFamilyHandle> columnFamilyHandleList = |
| new ArrayList<>(); |
| RocksDB rocksDB = RocksDB.openReadOnly(parent.getDbPath(), |
| cfs, columnFamilyHandleList); |
| this.printAppropriateTable(columnFamilyHandleList, |
| rocksDB, parent.getDbPath()); |
| return null; |
| } |
| |
| private void printAppropriateTable( |
| List<ColumnFamilyHandle> columnFamilyHandleList, |
| RocksDB rocksDB, String dbPath) throws IOException { |
| if (limit < 1) { |
| throw new IllegalArgumentException( |
| "List length should be a positive number"); |
| } |
| dbPath = removeTrailingSlashIfNeeded(dbPath); |
| this.constructColumnFamilyMap(DBDefinitionFactory. |
| getDefinition(new File(dbPath).getName())); |
| if (this.columnFamilyMap !=null) { |
| if (!this.columnFamilyMap.containsKey(tableName)) { |
| System.out.print("Table with name:" + tableName + " does not exist"); |
| } else { |
| DBColumnFamilyDefinition columnFamilyDefinition = |
| this.columnFamilyMap.get(tableName); |
| ColumnFamilyHandle columnFamilyHandle = getColumnFamilyHandle( |
| columnFamilyDefinition.getTableName() |
| .getBytes(StandardCharsets.UTF_8), |
| columnFamilyHandleList); |
| if (columnFamilyHandle == null) { |
| throw new IllegalArgumentException("columnFamilyHandle is null"); |
| } |
| RocksIterator iterator = rocksDB.newIterator(columnFamilyHandle); |
| scannedObjects = displayTable(iterator, columnFamilyDefinition); |
| } |
| } else { |
| System.out.println("Incorrect db Path"); |
| } |
| } |
| |
| private String removeTrailingSlashIfNeeded(String dbPath) { |
| if(dbPath.endsWith(OzoneConsts.OZONE_URI_DELIMITER)){ |
| dbPath = dbPath.substring(0, dbPath.length()-1); |
| } |
| return dbPath; |
| } |
| |
| @Override |
| public Class<?> getParentType() { |
| return RDBParser.class; |
| } |
| } |
| |