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    1   /***
    2    *
    3    * Copyright 2004 Protique Ltd
    4    *
    5    * Licensed under the Apache License, Version 2.0 (the "License");
    6    * you may not use this file except in compliance with the License.
    7    * You may obtain a copy of the License at
    8    *
    9    * http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   **/
    18  package org.codehaus.activemq.util;
    19
    20  import org.codehaus.activemq.store.PersistenceAdapter;
    21
    22  import javax.jms.JMSException;
    23
    24  /***
    25   * A helper class for running code with a PersistenceAdapter
    26   * in a transaction.
    27   *
    28   * @version $Revision: 1.2 $
    29   */
    30  public class TransactionTemplate {
    31      private PersistenceAdapter persistenceAdapter;
    32
    33      public TransactionTemplate(PersistenceAdapter persistenceAdapter) {
    34          this.persistenceAdapter = persistenceAdapter;
    35      }
    36
    37      public void run(Callback task) throws JMSException {
    38          persistenceAdapter.beginTransaction();
    39          Throwable throwable = null;
    40          try {
    41              task.execute();
    42          }
    43          catch (Throwable t) {
    44              throwable = t;
    45          }
    46          if (throwable == null) {
    47              persistenceAdapter.commitTransaction();
    48          }
    49          else {
    50              persistenceAdapter.rollbackTransaction();
    51          }
    52      }
    53  }