| /** |
| * 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.atlas.services; |
| |
| import org.apache.atlas.AtlasException; |
| import org.apache.atlas.typesystem.TypesDef; |
| import org.apache.atlas.typesystem.json.TypesSerialization; |
| import org.apache.atlas.typesystem.types.ClassType; |
| import org.apache.atlas.typesystem.types.HierarchicalTypeDefinition; |
| import org.apache.atlas.typesystem.types.TypeSystem; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.nio.file.Files; |
| import java.util.Arrays; |
| import java.util.Comparator; |
| |
| public class ReservedTypesRegistrar implements IBootstrapTypesRegistrar { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(ReservedTypesRegistrar.class); |
| |
| static String getTypesDir() { |
| return System.getProperty("atlas.home")+ File.separator+"models"; |
| } |
| |
| @Override |
| public void registerTypes(String typesDirName, TypeSystem typeSystem, MetadataService metadataService) |
| throws AtlasException { |
| File typesDir = new File(typesDirName); |
| if (!typesDir.exists()) { |
| LOG.info("No types directory {} found - not registering any reserved types", typesDirName); |
| return; |
| } |
| |
| File[] typeDefFiles = typesDir.listFiles(); |
| //TODO - Enforce a dependency order among models registered by definition and not by modifiedTime as below |
| // Workaround - Sort by modifiedTime to get the dependency of models in the right order - first hdfs, followed by hive and hive is needed by storm, falcon models. |
| // Sorting them by time will ensure the right order since the modules are in the correct order in pom. |
| Arrays.sort(typeDefFiles, new Comparator<File>() { |
| public int compare(File f1, File f2) { |
| return Long.valueOf(f1.lastModified()).compareTo(f2.lastModified()); |
| } |
| }); |
| |
| for (File typeDefFile : typeDefFiles) { |
| try { |
| String typeDefJSON = new String(Files.readAllBytes(typeDefFile.toPath()), StandardCharsets.UTF_8); |
| registerType(typeSystem, metadataService, typeDefFile.getAbsolutePath(), typeDefJSON); |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| } |
| |
| void registerType(TypeSystem typeSystem, MetadataService metadataService, String typeDefName, String typeDefJSON) |
| throws AtlasException { |
| TypesDef typesDef = null; |
| try { |
| typesDef = TypesSerialization.fromJson(typeDefJSON); |
| } catch (Exception e) { |
| LOG.error("Error while deserializing JSON in {}", typeDefName); |
| throw new ReservedTypesRegistrationException("Error while deserializing JSON in " + typeDefName, e); |
| } |
| HierarchicalTypeDefinition<ClassType> classDef = typesDef.classTypesAsJavaList().get(0); |
| if (!typeSystem.isRegistered(classDef.typeName)) { |
| metadataService.createType(typeDefJSON); |
| LOG.info("Registered types in {}", typeDefName); |
| } else { |
| LOG.warn("class {} already registered, ignoring types in {}", classDef.typeName, |
| typeDefName); |
| } |
| } |
| } |