src/c-apps/osrf_math.c

   1 #include "opensrf/osrf_app_session.h"
   2 #include "opensrf/osrf_application.h"
   3 #include "objson/object.h"
   4 #include "opensrf/osrf_log.h"
   5
   6 #define MODULENAME "opensrf.math"
   7
   8 int osrfAppInitialize();
   9 int osrfAppChildInit();
  10 int osrfMathRun( osrfMethodContext* );
  11
  12
  13 int osrfAppInitialize() {
  14
  15         osrfAppRegisterMethod(
  16                         MODULENAME,                             /* which application has this method */
  17                         "add",                                  /* the name of the method */
  18                         "osrfMathRun",                  /* the symbol that runs the method */
  19                         "Adds two numbers",     /* description of the method */
  20                         2,                                                      /* the minimum number of params required to run the method */
  21                         0 );                                            /* method options, 0 for not special options */
  22
  23         osrfAppRegisterMethod(
  24                         MODULENAME,
  25                         "sub",
  26                         "osrfMathRun",
  27                         "Subtracts two numbers", 2, 0 );
  28
  29         osrfAppRegisterMethod(
  30                         MODULENAME,
  31                         "mult",
  32                         "osrfMathRun",
  33                         "Multiplies two numbers", 2, 0 );
  34
  35         osrfAppRegisterMethod(
  36                         MODULENAME,
  37                         "div",
  38                         "osrfMathRun",
  39                         "Divides two numbers", 2, 0 );
  40
  41         return 0;
  42 }
  43
  44 int osrfAppChildInit() {
  45         return 0;
  46 }
  47
  48 int osrfMathRun( osrfMethodContext* ctx ) {
  49
  50         OSRF_METHOD_VERIFY_CONTEXT(ctx); /* see osrf_application.h */
  51
  52         osrfLog( OSRF_DEBUG, "Running opensrf.math %s", ctx->method->name );
  53
  54         /* collect the request params */
  55         jsonObject* x = jsonObjectGetIndex(ctx->params, 0);
  56         jsonObject* y = jsonObjectGetIndex(ctx->params, 1);
  57
  58         if( x && y ) {
  59
  60                 /* pull out the params as strings since they may be either
  61                         strings or numbers depending on the client */
  62                 char* a = jsonObjectToSimpleString(x);
  63                 char* b = jsonObjectToSimpleString(y);
  64
  65                 if( a && b ) {
  66
  67                         /* construct a new params object to send to dbmath */
  68                         jsonObject* newParams = jsonParseString( "[ %s, %s ]", a, b );
  69                         free(a); free(b);
  70
  71                         /* connect to db math */
  72                         osrfAppSession* ses = osrfAppSessionClientInit("opensrf.dbmath");
  73
  74                         /* dbmath uses the same method names that math does */
  75                         int req_id = osrfAppSessionMakeRequest( ses, newParams, ctx->method->name, 1, NULL );
  76                         osrfMessage* omsg = osrfAppSessionRequestRecv( ses, req_id, 60 );
  77
  78                         if(omsg) {
  79                                 /* return dbmath's response to the user */
  80                                 osrfAppRespondComplete( ctx, osrfMessageGetResult(omsg) );
  81                                 osrfMessageFree(omsg);
  82                                 osrfAppSessionFree(ses);
  83                                 return 0;
  84                         }
  85
  86                         osrfAppSessionFree(ses);
  87                 }
  88         }
  89
  90         return -1;
  91 }
  92
  93
  94