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.activemq.util;
  
  import java.io.IOException;
  import org.apache.activemq.broker.ConnectionContext;
  import org.apache.activemq.store.PersistenceAdapter;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * A helper class for running code with a PersistenceAdapter in a transaction.
   * 
   * 
   */
  public class TransactionTemplate {
      private static final Logger LOG = LoggerFactory.getLogger(TransactionTemplate.class);
      private PersistenceAdapter persistenceAdapter;
      private ConnectionContext context;
  
      public TransactionTemplate(PersistenceAdapter persistenceAdapter, ConnectionContext context) {
          this.persistenceAdapter = persistenceAdapter;
          this.context = context;
      }
  
      public void run(Callback task) throws IOException {
          persistenceAdapter.beginTransaction(context);
          Throwable throwable = null;
          try {
              task.execute();
          } catch (IOException t) {
              throwable = t;
              throw t;
          } catch (RuntimeException t) {
              throwable = t;
              throw t;
          } catch (Throwable t) {
              throwable = t;
              throw IOExceptionSupport.create("Persistence task failed: " + t, t);
          } finally {
              if (throwable == null) {
                  persistenceAdapter.commitTransaction(context);
              } else {
                  LOG.error("Having to Rollback - caught an exception: " + throwable);
                  persistenceAdapter.rollbackTransaction(context);
              }
          }
      }
  
      public ConnectionContext getContext() {
          return context;
      }
  
      public PersistenceAdapter getPersistenceAdapter() {
          return persistenceAdapter;
      }
  }
  