address comments

build.json

@@ -19,7 +19,7 @@
       ],
       "headers": [
         "src/core/census/context.h",
-        "src/core/census/resource_id.h"
+        "src/core/census/rpc_stat_id.h"
       ],
       "src": [
         "src/core/census/context.c",

include/grpc/census.h

@@ -100,8 +100,16 @@ int census_context_deserialize(const char *buffer, census_context **context);
  * future census calls will result in undefined behavior. */
 void census_context_destroy(census_context *context);
 
-/* Record a new value against the given stats ID and context. */
-void census_record_stat(census_context *context, int resource_id, double value);
+/* A census statistic to be recorded comprises two parts: an ID for the
+ * particular statistic and the value to be recorded against it. */
+typedef struct {
+  int id;
+  double value;
+} census_stat;
+
+/* Record new stats against the given context. */
+void census_record_stat(census_context *context, census_stat *stats,
+                        size_t nstats);
 
 #ifdef __cplusplus
 }

src/core/census/record_stat.c

@@ -32,7 +32,7 @@
  */
 
 #include <grpc/census.h>
-#include "src/core/census/resource_id.h"
+#include "src/core/census/rpc_stat_id.h"
 
-void census_record_stat(census_context *context, int resource_id,
-                        double value) {}
+void census_record_stat(census_context *context, census_stat *stats,
+                        size_t nstats) {}

src/core/census/rpc_stat_id.h

@@ -31,18 +31,16 @@
  *
  */
 
-#ifndef CENSUS_RESOURCE_ID_H
-#define CENSUS_RESOURCE_ID_H
+#ifndef CENSUS_RPC_STAT_ID_H
+#define CENSUS_RPC_STAT_ID_H
 
-/* Resource ID's used for census measurements. */
-#define RESOURCE_INVALID 0             /* Make default be invalid. */
-#define RESOURCE_RPC_CLIENT_REQUESTS 1 /* Count of client requests sent. */
-#define RESOURCE_RPC_SERVER_REQUESTS 2 /* Count of server requests sent. */
-#define RESOURCE_RPC_CLIENT_ERRORS 3   /* Client error counts. */
-#define RESOURCE_RPC_SERVER_ERRORS 4   /* Server error counts. */
-#define RESOURCE_RPC_CLIENT_LATENCY 5  /* Client side request latency. */
-#define RESOURCE_RPC_SERVER_LATENCY 6  /* Server side request latency. */
-#define RESOURCE_RPC_CLIENT_CPU 7      /* Client CPU processing time. */
-#define RESOURCE_RPC_SERVER_CPU 8      /* Server CPU processing time. */
+/* Stats ID's used for RPC measurements. */
+#define CENSUS_INVALID_STAT_ID 0     /* ID 0 is always invalid */
+#define CENSUS_RPC_CLIENT_REQUESTS 1 /* Count of client requests sent. */
+#define CENSUS_RPC_SERVER_REQUESTS 2 /* Count of server requests sent. */
+#define CENSUS_RPC_CLIENT_ERRORS 3   /* Client error counts. */
+#define CENSUS_RPC_SERVER_ERRORS 4   /* Server error counts. */
+#define CENSUS_RPC_CLIENT_LATENCY 5  /* Client side request latency. */
+#define CENSUS_RPC_SERVER_LATENCY 6  /* Server side request latency. */
 
-#endif /* CENSUS_RESOURCE_ID_H */
+#endif /* CENSUS_RPC_STAT_ID_H */