content: /**
   * 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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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 storm.trident.topology.state;
  
  
  import backtype.storm.Config;
  import java.util.List;
  import java.util.Map;
  
  public class TransactionalState {
  
      public static final String USER = "user";
      public static final String COORDINATOR = "coordinator";
      private ITransactionalStateStorage transactionalStateStorage;
  
      public static TransactionalState newUserState(Map conf, String id) {
          return new TransactionalState(conf, id, USER);
      }
  
      public static TransactionalState newCoordinatorState(Map conf, String id) {
          return new TransactionalState(conf, id, COORDINATOR);
      }
  
      protected TransactionalState(Map conf, String id, String subroot) {
          try {
              String className = null;
              if (conf.get(Config.STORM_TRANSATION_STATE_STORE_FACTORY) != null) {
                  className = (String) conf.get(Config.STORM_TRANSATION_STATE_STORE_FACTORY);
              } else {
                  className = "storm.trident.topology.state.TransactionalStateStorageZkFactory";
              }
              Class clazz = Class.forName(className);
              ITransactionalStateStorageFactory storageFactory = (ITransactionalStateStorageFactory) clazz.newInstance();
              transactionalStateStorage = storageFactory.mkTransactionalState(conf, id, subroot);
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
  
      public void setData(String path, Object obj) {
          transactionalStateStorage.setData(path, obj);
      }
  
      public void delete(String path) {
          transactionalStateStorage.delete(path);
      }
  
      public List<String> list(String path) {
          return transactionalStateStorage.list(path);
      }
  
      public void mkdir(String path) {
          transactionalStateStorage.mkdir(path);
      }
  
      public Object getData(String path) {
          return transactionalStateStorage.getData(path);
      }
  
      public void close() {
          transactionalStateStorage.close();
      }
  }
  