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