perfSONAR User Q&A and Other Discussion

["Michael Maul" <>]

Since it looks like rrdjtool seems to live here , below is a fix for rrdtool versions < 1.2.23. Now you can have your graphs if you use rrdjtool for that.

If one of the commiteres would like to commit this that would be great.

----------Repo path:perfsonar/trunk/perfsonar/contrib/rrdjtool/native/Rrd.c ---------------

JNIEXPORT jint JNICALL Java_rrd_Rrd_createRrdGraph

 (JNIEnv *env, jobject obj, jobjectArray ar) {
 int n = (*env)->GetArrayLength(env, ar);
 char **tokens = getTokens(env, ar, n);
 char **calcpr;
  jboolean iscopy;
  FILE *stream = NULL;
  double ymin=0;
  double ymax=0;
 int xsize, ysize, i;
  /* Starting with rrdtool 1.2.23 introduced the additional arguments FILE *stream, double *ymin, double *ymax
  stream is used as the image output sink if the filename passed to rrd_graph is equal to "-" and stream in non zero 
  otherwise stdout is used. I don't really see a use for that here so passing NULL as stream value.
  ymin and ymax appear to be minimum and ts values in the database. They are not be preserved. */
   
 int status = rrd_graph(n, tokens, &calcpr, &xsize, &ysize,stream,&ymin,&ymax);
 preserveError();
 if(status != -1) {
  preserveGraphOutput(calcpr, xsize, ysize);
 }
 releaseTokens(tokens, n);
 return status;
}