src/libstack/osrf_system.c

   1 #include "osrf_system.h"
   2 #include <signal.h>
   3 #include "osrf_application.h"
   4 #include "osrf_prefork.h"
   5
   6 void __osrfSystemSignalHandler( int sig );
   7
   8 transport_client* __osrfGlobalTransportClient = NULL;
   9
  10 transport_client* osrfSystemGetTransportClient() {
  11         return __osrfGlobalTransportClient;
  12 }
  13
  14 void osrfSystemIgnoreTransportClient() {
  15         __osrfGlobalTransportClient = NULL;
  16 }
  17
  18 transport_client* osrf_system_get_transport_client() {
  19         return __osrfGlobalTransportClient;
  20 }
  21
  22 int osrf_system_bootstrap_client( char* config_file, char* contextnode ) {
  23         return osrf_system_bootstrap_client_resc(config_file, contextnode, NULL);
  24 }
  25
  26 int osrfSystemBootstrapClientResc( char* config_file, char* contextnode, char* resource ) {
  27         return osrf_system_bootstrap_client_resc( config_file, contextnode, resource );
  28 }
  29
  30
  31 int _osrfSystemInitCache() {
  32
  33         jsonObject* cacheServers = osrf_settings_host_value_object("/cache/global/servers/server");
  34         char* maxCache = osrf_settings_host_value("/cache/global/max_cache_time");
  35
  36         if( cacheServers && maxCache) {
  37
  38                 if( cacheServers->type == JSON_ARRAY ) {
  39                         int i;
  40                         char* servers[cacheServers->size];
  41                         for( i = 0; i != cacheServers->size; i++ ) {
  42                                 servers[i] = jsonObjectGetString( jsonObjectGetIndex(cacheServers, i) );
  43                                 osrfLogInfo( OSRF_LOG_MARK, "Adding cache server %s", servers[i]);
  44                         }
  45                         osrfCacheInit( servers, cacheServers->size, atoi(maxCache) );
  46
  47                 } else {
  48                         char* servers[] = { jsonObjectGetString(cacheServers) };
  49                         osrfLogInfo( OSRF_LOG_MARK, "Adding cache server %s", servers[0]);
  50                         osrfCacheInit( servers, 1, atoi(maxCache) );
  51                 }
  52
  53         } else {
  54                 osrfLogError( OSRF_LOG_MARK,  "Missing config value for /cache/global/servers/server _or_ "
  55                         "/cache/global/max_cache_time");
  56         }
  57
  58         return 0;
  59 }
  60
  61
  62 int osrfSystemBootstrap( char* hostname, char* configfile, char* contextNode ) {
  63         if( !(hostname && configfile && contextNode) ) return -1;
  64
  65         /* first we grab the settings */
  66         if(!osrfSystemBootstrapClientResc(configfile, contextNode, "settings_grabber" )) {
  67                 osrfLogError( OSRF_LOG_MARK, "Unable to bootstrap");
  68                 return -1;
  69         }
  70
  71         osrf_settings_retrieve(hostname);
  72         osrf_system_disconnect_client();
  73
  74         jsonObject* apps = osrf_settings_host_value_object("/activeapps/appname");
  75         osrfStringArray* arr = osrfNewStringArray(8);
  76
  77         _osrfSystemInitCache();
  78
  79         if(apps) {
  80                 int i = 0;
  81
  82                 if(apps->type == JSON_STRING) {
  83                         osrfStringArrayAdd(arr, jsonObjectGetString(apps));
  84
  85                 } else {
  86                         jsonObject* app;
  87                         while( (app = jsonObjectGetIndex(apps, i++)) )
  88                                 osrfStringArrayAdd(arr, jsonObjectGetString(app));
  89                 }
  90
  91                 char* appname = NULL;
  92                 i = 0;
  93                 while( (appname = osrfStringArrayGetString(arr, i++)) ) {
  94
  95                         char* lang = osrf_settings_host_value("/apps/%s/language", appname);
  96
  97                         if(lang && !strcasecmp(lang,"c"))  {
  98
  99                                 char* libfile = osrf_settings_host_value("/apps/%s/implementation", appname);
 100
 101                                 if(! (appname && libfile) ) {
 102                                         osrfLogWarning( OSRF_LOG_MARK, "Missing appname / libfile in settings config");
 103                                         continue;
 104                                 }
 105
 106                                 osrfLogInfo( OSRF_LOG_MARK, "Launching application %s with implementation %s", appname, libfile);
 107
 108                                 int pid;
 109
 110                                 if( (pid = fork()) ) {
 111                                         // storage pid in local table for re-launching dead children...
 112                                         osrfLogInfo( OSRF_LOG_MARK, "Launched application child %d", pid);
 113
 114                                 } else {
 115
 116                                         fprintf(stderr, " * Running application %s\n", appname);
 117                                         if( osrfAppRegisterApplication( appname, libfile ) == 0 )
 118                                                 osrf_prefork_run(appname);
 119
 120                                         osrfLogDebug( OSRF_LOG_MARK, "Server exiting for app %s and library %s", appname, libfile );
 121                                         exit(0);
 122                                 }
 123                         } // language == c
 124                 }
 125         }
 126
 127         /** daemonize me **/
 128
 129         /* background and let our children do their thing */
 130         daemonize();
 131         while(1) {
 132                 signal(SIGCHLD, __osrfSystemSignalHandler);
 133                 sleep(10000);
 134         }
 135
 136         return 0;
 137 }
 138
 139 int osrf_system_bootstrap_client_resc( char* config_file, char* contextnode, char* resource ) {
 140
 141         if(osrfSystemGetTransportClient()) {
 142                 osrfLogInfo(OSRF_LOG_MARK, "Client is already bootstrapped");
 143                 return 1; /* we already have a client connection */
 144         }
 145
 146         if( !( config_file && contextnode ) && ! osrfConfigHasDefaultConfig() ) {
 147                 osrfLogError( OSRF_LOG_MARK, "No Config File Specified\n" );
 148                 return -1;
 149         }
 150
 151         if( config_file ) {
 152                 osrfConfigCleanup();
 153                 osrfConfig* cfg = osrfConfigInit( config_file, contextnode );
 154                 osrfConfigSetDefaultConfig(cfg);
 155         }
 156
 157
 158         char* log_file          = osrfConfigGetValue( NULL, "/logfile");
 159         char* log_level = osrfConfigGetValue( NULL, "/loglevel" );
 160         osrfStringArray* arr = osrfNewStringArray(8);
 161         osrfConfigGetValueList(NULL, arr, "/domains/domain");
 162         char* username          = osrfConfigGetValue( NULL, "/username" );
 163         char* password          = osrfConfigGetValue( NULL, "/passwd" );
 164         char* port                      = osrfConfigGetValue( NULL, "/port" );
 165         char* unixpath          = osrfConfigGetValue( NULL, "/unixpath" );
 166         char* facility          = osrfConfigGetValue( NULL, "/syslog" );
 167         char* actlog            = osrfConfigGetValue( NULL, "/actlog" );
 168
 169         char* domain = strdup(osrfStringArrayGetString( arr, 0 )); /* just the first for now */
 170         osrfStringArrayFree(arr);
 171
 172
 173         int llevel = 0;
 174         int iport = 0;
 175         if(port) iport = atoi(port);
 176         if(log_level) llevel = atoi(log_level);
 177
 178         if(!log_file) { fprintf(stderr, "Log file needed\n"); return -1; }
 179
 180         if(!strcmp(log_file, "syslog")) {
 181                 osrfLogInit( OSRF_LOG_TYPE_SYSLOG, contextnode, llevel );
 182                 osrfLogSetSyslogFacility(osrfLogFacilityToInt(facility));
 183                 if(actlog) osrfLogSetSyslogActFacility(osrfLogFacilityToInt(actlog));
 184
 185         } else {
 186                 osrfLogInit( OSRF_LOG_TYPE_FILE, contextnode, llevel );
 187                 osrfLogSetFile( log_file );
 188         }
 189
 190         osrfLogInfo( OSRF_LOG_MARK, "Bootstrapping system with domain %s, port %d, and unixpath %s", domain, iport, unixpath );
 191
 192         transport_client* client = client_init( domain, iport, unixpath, 0 );
 193
 194         char* host;
 195         host = getenv("HOSTNAME");
 196
 197         if(!host) host = "";
 198         if(!resource) resource = "";
 199
 200         int len = strlen(resource) + 256;
 201         char buf[len];
 202         memset(buf,0,len);
 203         snprintf(buf, len - 1, "%s_%s_%d", resource, host, getpid() );
 204
 205         if(client_connect( client, username, password, buf, 10, AUTH_DIGEST )) {
 206                 /* child nodes will leak the parents client... but we can't free
 207                         it without disconnecting the parents client :( */
 208                 __osrfGlobalTransportClient = client;
 209         }
 210
 211         free(actlog);
 212         free(facility);
 213         free(log_level);
 214         free(log_file);
 215         free(username);
 216         free(password);
 217         free(port);
 218         free(unixpath);
 219         free(domain);
 220
 221         if(__osrfGlobalTransportClient)
 222                 return 1;
 223
 224         return 0;
 225 }
 226
 227 int osrf_system_disconnect_client() {
 228         client_disconnect( __osrfGlobalTransportClient );
 229         client_free( __osrfGlobalTransportClient );
 230         __osrfGlobalTransportClient = NULL;
 231         return 0;
 232 }
 233
 234 int osrf_system_shutdown() {
 235         osrfConfigCleanup();
 236         osrf_system_disconnect_client();
 237         osrf_settings_free_host_config(NULL);
 238         osrfAppSessionCleanup();
 239         osrfLogCleanup();
 240         return 1;
 241 }
 242
 243
 244
 245
 246 void __osrfSystemSignalHandler( int sig ) {
 247
 248         pid_t pid;
 249         int status;
 250
 251         while( (pid = waitpid(-1, &status, WNOHANG)) > 0) {
 252                 osrfLogWarning( OSRF_LOG_MARK, "We lost child %d", pid);
 253         }
 254
 255         /** relaunch the server **/
 256 }
 257
 258