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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.ExternalContext;
    23  import javax.faces.context.FacesContext;
    24
    25  import org.apache.commons.logging.Log;
    26  import org.apache.commons.logging.LogFactory;
    27  import org.apache.myfaces.orchestra.CoreConfig;
    28  import org.apache.myfaces.orchestra.frameworkAdapter.FrameworkAdapter;
    29  import org.apache.myfaces.orchestra.frameworkAdapter.jsf.JsfFrameworkAdapter;
    30
    31  /**
    32   * RequestHandler that ensures that the FrameworkAdapter is initialised as a JsfFrameworkAdapter.
    33   *
    34   * @since 1.1
    35   */
    36  class FrameworkAdapterRequestHandler implements RequestHandler
    37  {
    38      private final static String CONVERSATION_MESSAGER_CLASS =
    39          "org.apache.myfaces.orchestra.CONVERSATION_MESSAGER"; // NON-NLS
    40
    41      private final Log log = LogFactory.getLog(FrameworkAdapterRequestHandler.class);
    42
    43      private JsfFrameworkAdapter adapter;
    44
    45      public void init(FacesContext facesContext) throws FacesException
    46      {
    47          if (log.isDebugEnabled())
    48          {
    49              log.debug("init");
    50          }
    51
    52          if (FrameworkAdapter.getCurrentInstance() == null)
    53          {
    54              if (log.isDebugEnabled())
    55              {
    56                  log.debug("creating jsfFrameworkAdapter");
    57              }
    58              // No filter has yet initialised the adapter, so do it here.
    59              String conversationMessagerClass = getConversationMessagerClass(facesContext);
    60              adapter = new JsfFrameworkAdapter(conversationMessagerClass);
    61              adapter.beginRequest();
    62          }
    63      }
    64
    65      public void deinit() throws FacesException
    66      {
    67          if (adapter != null)
    68          {
    69              adapter.endRequest();
    70          }
    71      }
    72
    73      private static String getConversationMessagerClass(FacesContext facesContext)
    74      {
    75          ExternalContext ec = facesContext.getExternalContext();
    76
    77          String cn = ec.getInitParameter(CONVERSATION_MESSAGER_CLASS);
    78          if (cn != null)
    79          {
    80              return cn;
    81          }
    82
    83          cn = ec.getInitParameter(CoreConfig.CONVERSATION_MESSAGER);
    84          return cn;
    85      }
    86  }