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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one
    3    * or more contributor license agreements.  See the NOTICE file
    4    * distributed with this work for additional information
    5    * regarding copyright ownership.  The ASF licenses this file
    6    * to you under the Apache License, Version 2.0 (the
    7    * "License"); you may not use this file except in compliance
    8    * with the License.  You may obtain a copy of the License at
    9    *
    10   *   http://www.apache.org/licenses/LICENSE-2.0
    11   *
    12   * Unless required by applicable law or agreed to in writing,
    13   * software distributed under the License is distributed on an
    14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    15   * KIND, either express or implied.  See the License for the
    16   * specific language governing permissions and limitations
    17   * under the License.
    18   */
    19
    20  package org.apache.myfaces.orchestra.conversation.basic;
    21
    22  import org.apache.commons.logging.Log;
    23  import org.apache.commons.logging.LogFactory;
    24  import org.apache.myfaces.orchestra.conversation.ConversationMessager;
    25
    26  /**
    27   * Handle user-specific notifications about conversation anomalies, when we are running
    28   * in a plain servlet environment (no JSF etc).
    29   * <p>
    30   * Unfortunately there is no standard way of displaying a message to a user in such an
    31   * environment (except possibly throwing an exception, forcing the standard error page
    32   * to be shown). This implementation therefore just logs the message to the standard
    33   * server application log.
    34   * <p>
    35   * If you do not like the default behaviour then implement your own version of this
    36   * class and configure your alternative as the standard "Conversation Messager"
    37   * instead. See the documentation on interface ConversationMessager for details.
    38   * <p>
    39   * As required by the ConversationMessager interface, all methods on this class are thread-safe.
    40   */
    41  public class LogConversationMessager extends ConversationMessager
    42  {
    43      private final Log log = LogFactory.getLog(LogConversationMessager.class);
    44
    45      public void setConversationException(Throwable t)
    46      {
    47          log.info("Conversation exception occurred", t);
    48      }
    49
    50      public void setConversationNotActive(String name)
    51      {
    52          log.info("Conversation not active: " + name);
    53      }
    54  }