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1   /* 
2    * Copyright (c) 2007, Fraunhofer-Gesellschaft
3    * All rights reserved.
4    * 
5    * Redistribution and use in source and binary forms, with or without
6    * modification, are permitted provided that the following conditions are
7    * met:
8    * 
9    * (1) Redistributions of source code must retain the above copyright
10   *     notice, this list of conditions and the disclaimer at the end.
11   *     Redistributions in binary form must reproduce the above copyright
12   *     notice, this list of conditions and the following disclaimer in
13   *     the documentation and/or other materials provided with the
14   *     distribution.
15   * 
16   * (2) Neither the name of Fraunhofer nor the names of its
17   *     contributors may be used to endorse or promote products derived
18   *     from this software without specific prior written permission.
19   * 
20   * DISCLAIMER
21   * 
22   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33   *  
34   */
35  package org.ogf.graap.wsag.server.monitoring;
36  
37  import java.text.MessageFormat;
38  
39  import org.apache.log4j.Logger;
40  
41  /**
42   * ServiceTermStateMonitor
43   * 
44   * @author Oliver Waeldrich
45   * 
46   */
47  public class ServiceTermStateMonitor
48  {
49  
50      private static final Logger LOG = Logger.getLogger( ServiceTermStateMonitor.class );
51  
52      /**
53       * Calls the service term monitoring
54       * 
55       * @param monitoringContext
56       *            call the {@link ServiceTermStateMonitor} with the given monitoring context
57       * 
58       * @return true if the monitoring was successful, false otherwise.
59       */
60      public boolean monitor( IMonitoringContext monitoringContext )
61      {
62          //
63          // create a copy of the monitoring context
64          //
65          IMonitoringContext currentMonitoringContext;
66          try
67          {
68              currentMonitoringContext = (IMonitoringContext) monitoringContext.clone();
69          }
70          catch ( CloneNotSupportedException e )
71          {
72              throw new IllegalStateException( "Could not clone monitoring context." );
73          }
74  
75          //
76          // let the monitoring handler update the states using the current context
77          //
78          for ( int i = 0; i < monitoringContext.getMonitoringHandler().length; i++ )
79          {
80              IServiceTermMonitoringHandler handler = null;
81  
82              try
83              {
84                  handler = monitoringContext.getMonitoringHandler()[i];
85                  handler.monitor( currentMonitoringContext );
86              }
87              catch ( Exception e )
88              {
89                  String handlerName = ( handler != null ) ? handler.getClass().getName() : null;
90  
91                  String msgSDTUpdateError =
92                      "Monitoring of service term states failed for handler [{0}]. "
93                          + "Service term states are not updated. Reason: {1}";
94  
95                  LOG.error( MessageFormat.format( msgSDTUpdateError,
96                                                   new Object[] { handlerName, e.getMessage() } ) );
97  
98                  if ( LOG.isDebugEnabled() )
99                  {
100                     LOG.debug( e );
101                 }
102 
103                 return false;
104             }
105         }
106 
107         //
108         // after the monitoring process was executed successful,
109         // we update the monitoring context object at once
110         //
111         monitoringContext.setServiceTemState( currentMonitoringContext.getServiceTermStates() );
112 
113         return true;
114     }
115 
116 }