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.runtime.job.listener;
  
  import java.util.Map;
  
  import org.apache.asterix.common.api.IJobEventListenerFactory;
  import org.apache.asterix.common.api.INcApplicationContext;
  import org.apache.asterix.common.exceptions.ACIDException;
  import org.apache.asterix.common.transactions.ITransactionContext;
  import org.apache.asterix.common.transactions.ITransactionManager;
  import org.apache.asterix.common.transactions.TransactionOptions;
  import org.apache.asterix.common.transactions.TxnId;
  import org.apache.hyracks.api.context.IHyracksJobletContext;
  import org.apache.hyracks.api.job.IJobletEventListener;
  import org.apache.hyracks.api.job.IJobletEventListenerFactory;
  import org.apache.hyracks.api.job.JobParameterByteStore;
  import org.apache.hyracks.api.job.JobStatus;
  
  /**
   * This Joblet enable transactions on multiple datasets to take place in the same Hyracks Job
   * It takes a list of Transaction job ids instead of a single job Id
   */
  public class MultiTransactionJobletEventListenerFactory implements IJobEventListenerFactory {
  
      private static final long serialVersionUID = 1L;
      private final Map<Integer, TxnId> txnIdMap;
      private final boolean transactionalWrite;
  
      public MultiTransactionJobletEventListenerFactory(Map<Integer, TxnId> txnIdMap, boolean transactionalWrite) {
          this.txnIdMap = txnIdMap;
          this.transactionalWrite = transactionalWrite;
      }
  
      @Override
      public TxnId getTxnId(int datasetId) {
          return txnIdMap.get(datasetId);
      }
  
      @Override
      public IJobletEventListenerFactory copyFactory() {
          return new MultiTransactionJobletEventListenerFactory(txnIdMap, transactionalWrite);
      }
  
      @Override
      public void updateListenerJobParameters(JobParameterByteStore jobParameterByteStore) {
          //no op
      }
  
      @Override
      public IJobletEventListener createListener(final IHyracksJobletContext jobletContext) {
  
          return new IJobletEventListener() {
              @Override
              public void jobletFinish(JobStatus jobStatus) {
                  try {
                      ITransactionManager txnManager =
                              ((INcApplicationContext) jobletContext.getServiceContext().getApplicationContext())
                                      .getTransactionSubsystem().getTransactionManager();
                      for (TxnId subTxnId : txnIdMap.values()) {
                          ITransactionContext txnContext = txnManager.getTransactionContext(subTxnId);
                          txnContext.setWriteTxn(transactionalWrite);
                          if (jobStatus != JobStatus.FAILURE) {
                              txnManager.commitTransaction(subTxnId);
                          } else {
                              txnManager.abortTransaction(subTxnId);
                          }
                      }
                  } catch (ACIDException e) {
                      throw new Error(e);
                  }
              }
  
              @Override
              public void jobletStart() {
                  try {
                      TransactionOptions options =
                              new TransactionOptions(ITransactionManager.AtomicityLevel.ENTITY_LEVEL);
                      for (TxnId subTxnId : txnIdMap.values()) {
                          ((INcApplicationContext) jobletContext.getServiceContext().getApplicationContext())
                                  .getTransactionSubsystem().getTransactionManager().beginTransaction(subTxnId, options);
                      }
                  } catch (ACIDException e) {
                      throw new Error(e);
                  }
              }
  
          };
      }
  }
  