1 martin 1.5 //%LICENSE////////////////////////////////////////////////////////////////

  2 martin 1.6 //

  3 martin 1.5 // Licensed to The Open Group (TOG) under one or more contributor license
  4            // agreements.  Refer to the OpenPegasusNOTICE.txt file distributed with
  5            // this work for additional information regarding copyright ownership.
  6            // Each contributor licenses this file to you under the OpenPegasus Open
  7            // Source License; you may not use this file except in compliance with the
  8            // License.

  9 martin 1.6 //

 10 martin 1.5 // Permission is hereby granted, free of charge, to any person obtaining a
 11            // copy of this software and associated documentation files (the "Software"),
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 15            // Software is furnished to do so, subject to the following conditions:

 16 martin 1.6 //

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 21 martin 1.6 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

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 27 martin 1.6 //

 28 martin 1.5 //////////////////////////////////////////////////////////////////////////

 29 kumpf  1.1 //
 30            //%/////////////////////////////////////////////////////////////////////////////
 31            
 32            #ifndef Pegasus_ServerRunStatus_h
 33            #define Pegasus_ServerRunStatus_h
 34            

 35 dave.sudlik 1.2 #ifdef PEGASUS_OS_TYPE_WINDOWS
 36                 #include <windows.h>
 37                 #endif

 38 kumpf       1.1 #include <Pegasus/Common/Config.h>
 39                 #include <Pegasus/Common/String.h>
 40                 #include <Service/Linkage.h>
 41                 
 42                 PEGASUS_NAMESPACE_BEGIN
 43                 

 44 ouyang.jian 1.3 #if defined(PEGASUS_OS_TYPE_WINDOWS)

 45 kumpf       1.1 typedef int PEGASUS_PID_T;
 46                 #else
 47                 typedef pid_t PEGASUS_PID_T;
 48                 #endif
 49                 
 50                 /**
 51                     The ServerRunStatus class is used to manage the run status of a
 52                     server.  It can be used to determine if an instance of the server is
 53                     already running, to kill a running instance, and to indicate that an
 54                     instance is being started.
 55                 
 56                     The implementation varies per platform.  On Unix platforms, a PID file
 57                     is used to record the process ID of the running server.  On Windows,
 58                     an event handle is used and the PID parameters are not meaningful.
 59                 */
 60                 class PEGASUS_SERVICE_LINKAGE ServerRunStatus
 61                 {
 62                 public:
 63                 
 64                     /**
 65                         Constructs a ServerRunStatus instance with the specified server
 66 kumpf       1.1         parameters.
 67                     */
 68                     ServerRunStatus(
 69                         const char* serverName,
 70                         const char* pidFilePath);
 71                 
 72                     /**
 73                         Destructs the ServerRunStatus instance.  On Windows, this
 74                         indicates to the system that this instance of the server is no
 75                         longer running.
 76                     */
 77                     ~ServerRunStatus();
 78                 
 79                     /**
 80                         Determines whether the server is running, based on the parameters
 81                         specified in the constructor.
 82                     */
 83                     Boolean isServerRunning();
 84                 
 85                     /**
 86                         Indicates that this instance of the server is now running.
 87 kumpf       1.1     */
 88                     void setServerRunning();
 89                 
 90                     /**

 91 venkat.puvvada 1.7         Indicates that this instance of the server is not running.
 92                        */
 93                        void setServerNotRunning();
 94                    
 95                        /**

 96 kumpf          1.1         On platforms that use a PID file, this method allows a parent process
 97                            ID to be specified.  This allows the isServerRunning() method to take
 98                            the parent process into consideration.
 99                        */
100                        void setParentPid(PEGASUS_PID_T parentPid);
101                    
102                        /**
103                            Sends a SIGKILL signal to the running server process on platforms
104                            that support signals.
105                        */
106                        Boolean kill();
107                    
108                    private:
109                    
110                        /**
111                            Determines whether the specified process ID is an instance of the
112                            server specified in the constructor.
113                        */
114                        Boolean _isServerProcess(PEGASUS_PID_T pid);
115                    
116                        const char* _serverName;

117 kumpf          1.4 
118                        /**
119                            The path to the PID file for this server.  The PID of the server
120                            process is written to this file by setServerRunning().  The
121                            isServerRunning() and kill() methods also use this file.
122                            NOTE: The PID file is not used in the Windows implementation.
123                        */

124 kumpf          1.1     const char* _pidFilePath;

125 kumpf          1.4 
126                        /**
127                            Indicates whether this ServerRunStatus instance is for the server that
128                            is actually running.  A call to setServerRunning() sets this to true.
129                            If this flag is true when the ServerRunStatus instance is destructed,
130                            the PID file is removed.
131                        */
132                        Boolean _isRunningServerInstance;
133                    

134 kumpf          1.1     PEGASUS_PID_T _parentPid;
135                    
136                    #ifdef PEGASUS_OS_TYPE_WINDOWS
137                        HANDLE _event;
138                        Boolean _wasAlreadyRunning;
139                    #endif
140                    };
141                    
142                    PEGASUS_NAMESPACE_END
143                    
144                    #endif // Pegasus_ServerRunStatus_h