SimpleConnectionManager xref

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    1   /***
    2    *
    3    * Copyright 2004 Hiram Chirino
    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.ra;
    19
    20  import org.apache.commons.logging.Log;
    21  import org.apache.commons.logging.LogFactory;
    22
    23  import javax.resource.ResourceException;
    24  import javax.resource.spi.ConnectionEvent;
    25  import javax.resource.spi.ConnectionEventListener;
    26  import javax.resource.spi.ConnectionManager;
    27  import javax.resource.spi.ConnectionRequestInfo;
    28  import javax.resource.spi.ManagedConnection;
    29  import javax.resource.spi.ManagedConnectionFactory;
    30  import javax.security.auth.Subject;
    31
    32
    33  /***
    34   * A simple implementation of a ConnectionManager.
    35   * An App Server will have a better implementation with pooling and security etc.
    36   *
    37   * @version $Revision: 1.4 $
    38   */
    39  public class SimpleConnectionManager implements ConnectionManager, ConnectionEventListener {
    40
    41      private static final Log log = LogFactory.getLog(SimpleConnectionManager.class);
    42
    43      /***
    44       * @see javax.resource.spi.ConnectionManager#allocateConnection(javax.resource.spi.ManagedConnectionFactory, javax.resource.spi.ConnectionRequestInfo)
    45       */
    46      public Object allocateConnection(ManagedConnectionFactory connectionFactory, ConnectionRequestInfo info) throws ResourceException {
    47          Subject subject = null;
    48          ManagedConnection connection = connectionFactory.createManagedConnection(subject, info);
    49          connection.addConnectionEventListener(this);
    50          return connection.getConnection(subject, info);
    51      }
    52
    53      /***
    54       * @see javax.resource.spi.ConnectionEventListener#connectionClosed(javax.resource.spi.ConnectionEvent)
    55       */
    56      public void connectionClosed(ConnectionEvent event) {
    57          try {
    58              ((ManagedConnection) event.getSource()).cleanup();
    59          }
    60          catch (ResourceException e) {
    61              log.warn("Error occured during the cleanup of a managed connection: ", e);
    62          }
    63          try {
    64              ((ManagedConnection) event.getSource()).destroy();
    65          }
    66          catch (ResourceException e) {
    67              log.warn("Error occured during the destruction of a managed connection: ", e);
    68          }
    69      }
    70
    71      /***
    72       * @see javax.resource.spi.ConnectionEventListener#localTransactionStarted(javax.resource.spi.ConnectionEvent)
    73       */
    74      public void localTransactionStarted(ConnectionEvent event) {
    75      }
    76
    77      /***
    78       * @see javax.resource.spi.ConnectionEventListener#localTransactionCommitted(javax.resource.spi.ConnectionEvent)
    79       */
    80      public void localTransactionCommitted(ConnectionEvent event) {
    81      }
    82
    83      /***
    84       * @see javax.resource.spi.ConnectionEventListener#localTransactionRolledback(javax.resource.spi.ConnectionEvent)
    85       */
    86      public void localTransactionRolledback(ConnectionEvent event) {
    87      }
    88
    89      /***
    90       * @see javax.resource.spi.ConnectionEventListener#connectionErrorOccurred(javax.resource.spi.ConnectionEvent)
    91       */
    92      public void connectionErrorOccurred(ConnectionEvent event) {
    93          log.warn("Managed connection experiened an error: ", event.getException());
    94          try {
    95              ((ManagedConnection) event.getSource()).cleanup();
    96          }
    97          catch (ResourceException e) {
    98              log.warn("Error occured during the cleanup of a managed connection: ", e);
    99          }
    100         try {
    101             ((ManagedConnection) event.getSource()).destroy();
    102         }
    103         catch (ResourceException e) {
    104             log.warn("Error occured during the destruction of a managed connection: ", e);
    105         }
    106     }
    107
    108 }