store: Don't report an error if a missing writer callback isn't used.

That is, allow to emit store objects to an incomplete writer as long as all
required callbacks are present.

diff --git a/src/core/store_json.c b/src/core/store_json.c
index 4fd309b3ec4ac6fa81f982fd9e71b2d3226d0af7..961e54c0606ae84206d1199758506ad4ff212cbf 100644 (file)
--- a/src/core/store_json.c
+++ b/src/core/store_json.c
@@ -384,9 +384,7 @@ sdb_store_json_formatter(sdb_strbuf_t *buf, int type, int flags)
 int
 sdb_store_emit(sdb_store_obj_t *obj, sdb_store_writer_t *w, sdb_object_t *wd)
 {
-       if ((! obj) || (! w)
-                       || (! w->store_host) || (! w->store_service)
-                       || (! w->store_metric) || (! w->store_attribute))
+       if ((! obj) || (! w))
                return -1;
 
        switch (obj->type) {
@@ -399,6 +397,8 @@ sdb_store_emit(sdb_store_obj_t *obj, sdb_store_writer_t *w, sdb_object_t *wd)
                                (const char * const *)obj->backends,
                                obj->backends_num,
                        };
+                       if (! w->store_host)
+                               return -1;
                        return w->store_host(&host, wd);
                }
        case SDB_SERVICE:
@@ -411,6 +411,8 @@ sdb_store_emit(sdb_store_obj_t *obj, sdb_store_writer_t *w, sdb_object_t *wd)
                                (const char * const *)obj->backends,
                                obj->backends_num,
                        };
+                       if (! w->store_service)
+                               return -1;
                        return w->store_service(&service, wd);
                }
        case SDB_METRIC:
@@ -427,6 +429,8 @@ sdb_store_emit(sdb_store_obj_t *obj, sdb_store_writer_t *w, sdb_object_t *wd)
                                (const char * const *)obj->backends,
                                obj->backends_num,
                        };
+                       if (! w->store_metric)
+                               return -1;
                        return w->store_metric(&metric, wd);
                }
        case SDB_ATTRIBUTE:
@@ -445,6 +449,8 @@ sdb_store_emit(sdb_store_obj_t *obj, sdb_store_writer_t *w, sdb_object_t *wd)
                        if (obj->parent && (obj->parent->type != SDB_HOST)
                                        && obj->parent->parent)
                                attr.hostname = obj->parent->parent->_name;
+                       if (! w->store_attribute)
+                               return -1;
                        return w->store_attribute(&attr, wd);
                }
        }