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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  package org.apache.myfaces.orchestra.lib.jsf;
    20
    21  import javax.faces.FacesException;
    22  import javax.faces.context.FacesContext;
    23
    24  import org.apache.myfaces.orchestra.conversation.ConversationManager;
    25
    26  /**
    27   * RequestHandler that simply ensures that a ConversationManager exists for the current user
    28   * at the start of a request.
    29   * <p>
    30   * However if there is no session then one is not created, as that would force the creation
    31   * of a session to store it in. Creating the session is particularly unfriendly for apps
    32   * that use weblets and disable cookies..
    33   *
    34   * @since 1.1
    35   */
    36  class ConversationManagerRequestHandler implements RequestHandler
    37  {
    38      public void init(FacesContext facesContext) throws FacesException
    39      {
    40          Object session = facesContext.getExternalContext().getSession(false);
    41          if (session != null)
    42          {
    43              ConversationManager.getInstance();
    44          }
    45      }
    46
    47      public void deinit() throws FacesException
    48      {
    49      }
    50  }
    51