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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.frameworkAdapter.jsf;
    21
    22  import org.apache.commons.logging.Log;
    23  import org.apache.commons.logging.LogFactory;
    24  import org.apache.myfaces.orchestra.lib._UrlMatcher;
    25
    26  import javax.servlet.Filter;
    27  import javax.servlet.FilterChain;
    28  import javax.servlet.FilterConfig;
    29  import javax.servlet.ServletException;
    30  import javax.servlet.ServletRequest;
    31  import javax.servlet.ServletResponse;
    32  import java.io.IOException;
    33
    34  /**
    35   * Configures the JsfFrameworkAdapter.
    36   * <p>
    37   * Orchestra accesses information about the request, response, session, etc via a
    38   * FrameworkAdapter so that it can be used with multiple web tier frameworks. This
    39   * class selects and configures the JSF version of this adapter.
    40   * <p>
    41   * Note that the conversation.jsf.OrchestraServletFilter class executes this class
    42   * as a "subfilter", so defining this filter is not required if that filter is
    43   * already defined.
    44   * <p>
    45   * If filter config parameter "conversationMessagerClass" is set, then this is
    46   * passed to the BasicFrameworkAdapter, meaning that this can be either a
    47   * beanname defined in the dependency-injection framework, or an absolute
    48   * classname of a type implementing ConversationMessager.
    49   * <p>
    50   * Note that this class is generally only needed in Orchestra 1.0. In later
    51   * releases the OrchestraFacesContextFactory configures the JsfFrameworkAdapter
    52   * instead, requiring less configuration. However this class can be used if the
    53   * OrchestraFacesContextFactory approach cannot be used for some reason.
    54   */
    55  public class JsfFrameworkAdapterFilter implements Filter
    56  {
    57      private final static String INIT_CONVERSATION_MESSAGER = "conversationMessagerClass";
    58
    59      private final Log log = LogFactory.getLog(JsfFrameworkAdapterFilter.class);
    60      private JsfFrameworkAdapter adapter;
    61      private _UrlMatcher urlMatcher;
    62
    63      public void init(FilterConfig filterConfig) throws ServletException
    64      {
    65          String conversationMessager = filterConfig.getInitParameter(INIT_CONVERSATION_MESSAGER);
    66
    67          adapter =  new JsfFrameworkAdapter(conversationMessager);
    68          urlMatcher = new _UrlMatcher(filterConfig);
    69      }
    70
    71      public void doFilter(ServletRequest req, ServletResponse rsp, FilterChain filterChain)
    72      throws IOException, ServletException
    73      {
    74          if (!urlMatcher.accept(req))
    75          {
    76              filterChain.doFilter(req, rsp);
    77              return;
    78          }
    79
    80          if (log.isDebugEnabled())
    81          {
    82              log.debug("doFilter");
    83          }
    84          try
    85          {
    86              adapter.beginRequest();
    87              filterChain.doFilter(req, rsp);
    88          }
    89          finally
    90          {
    91              adapter.endRequest();
    92          }
    93      }
    94
    95      public void destroy()
    96      {
    97      }
    98  }