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LayoutValve xref
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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  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  package org.apache.jetspeed.layout.impl;
18  
19  import org.apache.jetspeed.ajax.AjaxRequestService;
20  import org.apache.jetspeed.pipeline.PipelineException;
21  import org.apache.jetspeed.pipeline.valve.Valve;
22  import org.apache.jetspeed.pipeline.valve.ValveContext;
23  import org.apache.jetspeed.request.RequestContext;
24  
25  public class LayoutValve implements Valve
26  {
27  
28      // Ajax service handler
29      AjaxRequestService ajaxService = null;
30  
31      public LayoutValve(AjaxRequestService ajaxService)
32      {
33          this.ajaxService = ajaxService;
34      }
35  
36      public void initialize() throws PipelineException
37      {
38      }
39  
40      public void invoke(RequestContext requestContext,
41              ValveContext valveContext) throws PipelineException
42      {
43          try
44          {
45              // Delegate the call to the AjaxService
46              ajaxService.process(requestContext);
47  
48              if(valveContext != null) 
49              {
50                  valveContext.invokeNext(requestContext);
51              }            
52          } 
53          catch (Throwable t)
54          {
55              throw new PipelineException(t);
56          }
57      }
58  }