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
   *
   *   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.dataflow;
  
  import java.util.List;
  
  import org.apache.asterix.common.ioopcallbacks.LSMIOOperationCallback;
  import org.apache.asterix.common.transactions.ILogManager;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
  import org.apache.hyracks.storage.am.lsm.common.impls.AbstractLSMIndex;
  
  public class LSMIndexUtil {
  
      private LSMIndexUtil() {
      }
  
      public static void checkAndSetFirstLSN(AbstractLSMIndex lsmIndex, ILogManager logManager)
              throws HyracksDataException {
          // If the index has an empty memory component, we need to set its first LSN (For soft checkpoint)
          if (lsmIndex.isCurrentMutableComponentEmpty()) {
              //prevent transactions from incorrectly setting the first LSN on a modified component by checking the index is still empty
              synchronized (lsmIndex.getOperationTracker()) {
                  if (lsmIndex.isCurrentMutableComponentEmpty()) {
                      LSMIOOperationCallback ioOpCallback = (LSMIOOperationCallback) lsmIndex.getIOOperationCallback();
                      ioOpCallback.setFirstLsnForCurrentMemoryComponent(logManager.getAppendLSN());
                  }
              }
          }
      }
  
      public static void waitFor(List<? extends ILSMIOOperation> ioOperations) throws HyracksDataException {
          for (int i = 0; i < ioOperations.size(); i++) {
              try {
                  ioOperations.get(i).sync();
              } catch (InterruptedException e) {
                  Thread.currentThread().interrupt();
                  throw HyracksDataException.create(e);
              }
          }
      }
  }
  