From: Sebastian Harl <sh@tokkee.org>
Date: Wed, 30 Sep 2015 09:17:07 +0000 (+0200)
Subject: store_json: Let the formatter implement the store-writer interface.
X-Git-Tag: sysdb-0.8.0~19
X-Git-Url: https://git.tokkee.org/?p=sysdb.git;a=commitdiff_plain;h=6a09adcd03cbb0ee7f32a523c6d9d4895979c8d9

store_json: Let the formatter implement the store-writer interface.
---

diff --git a/src/core/store_json.c b/src/core/store_json.c
index 26a0854..5d0408a 100644
--- a/src/core/store_json.c
+++ b/src/core/store_json.c
@@ -260,10 +260,118 @@ json_emit(sdb_store_json_formatter_t *f, obj_t *obj)
 	return 0;
 } /* json_emit */
 
+static int
+emit_host(sdb_store_host_t *host, sdb_object_t *user_data)
+{
+	sdb_store_json_formatter_t *f = F(user_data);
+
+	if ((! host) || (! user_data))
+		return -1;
+
+	{
+		obj_t o = {
+			SDB_HOST,
+			host->name,
+
+			/* value */ NULL,
+			/* timeseries */ -1,
+
+			host->last_update,
+			host->interval,
+			host->backends_num,
+			(const char * const *)host->backends,
+		};
+
+		return json_emit(f, &o);
+	}
+} /* emit_host */
+
+static int
+emit_service(sdb_store_service_t *service, sdb_object_t *user_data)
+{
+	sdb_store_json_formatter_t *f = F(user_data);
+
+	if ((! service) || (! user_data))
+		return -1;
+
+	{
+		obj_t o = {
+			SDB_SERVICE,
+			service->name,
+
+			/* value */ NULL,
+			/* timeseries */ -1,
+
+			service->last_update,
+			service->interval,
+			service->backends_num,
+			(const char * const *)service->backends,
+		};
+
+		return json_emit(f, &o);
+	}
+} /* emit_service */
+
+static int
+emit_metric(sdb_store_metric_t *metric, sdb_object_t *user_data)
+{
+	sdb_store_json_formatter_t *f = F(user_data);
+
+	if ((! metric) || (! user_data))
+		return -1;
+
+	{
+		obj_t o = {
+			SDB_METRIC,
+			metric->name,
+
+			/* value */ NULL,
+			/* timeseries */ metric->store.type != NULL,
+
+			metric->last_update,
+			metric->interval,
+			metric->backends_num,
+			(const char * const *)metric->backends,
+		};
+
+		return json_emit(f, &o);
+	}
+} /* emit_metric */
+
+static int
+emit_attribute(sdb_store_attribute_t *attr, sdb_object_t *user_data)
+{
+	sdb_store_json_formatter_t *f = F(user_data);
+
+	if ((! attr) || (! user_data))
+		return -1;
+
+	{
+		obj_t o = {
+			SDB_ATTRIBUTE,
+			attr->key,
+
+			/* value */ &attr->value,
+			/* timeseries */ -1,
+
+			attr->last_update,
+			attr->interval,
+			attr->backends_num,
+			(const char * const *)attr->backends,
+		};
+
+		return json_emit(f, &o);
+	}
+} /* emit_attribute */
+
 /*
  * public API
  */
 
+sdb_store_writer_t sdb_store_json_writer = {
+	emit_host, emit_service, emit_metric, emit_attribute,
+};
+
 sdb_store_json_formatter_t *
 sdb_store_json_formatter(sdb_strbuf_t *buf, int type, int flags)
 {
diff --git a/src/include/core/store.h b/src/include/core/store.h
index ea0cd97..ddd0400 100644
--- a/src/include/core/store.h
+++ b/src/include/core/store.h
@@ -775,6 +775,13 @@ sdb_store_json_emit_full(sdb_store_json_formatter_t *f, sdb_store_obj_t *obj,
 int
 sdb_store_json_finish(sdb_store_json_formatter_t *f);
 
+/*
+ * sdb_store_json_writer:
+ * A store writer implementation that generates JSON output. It expects a
+ * store JSON formatter as its user-data argument.
+ */
+extern sdb_store_writer_t sdb_store_json_writer;
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif