X-Git-Url: https://git.tokkee.org/?p=sysdb.git;a=blobdiff_plain;f=src%2Finclude%2Fcore%2Fstore.h;h=0cee91362998d55c4f329c031572d5096e68400c;hp=a1e5e179ca5ec03d40fedc20081ec9b9f86a3e7f;hb=9a96acd759c31211aa512e174339a9c178c4eb83;hpb=07d956b72b9b0498b5ef720ea647f2df517b7a90

diff --git a/src/include/core/store.h b/src/include/core/store.h
index a1e5e17..0cee913 100644
--- a/src/include/core/store.h
+++ b/src/include/core/store.h
@@ -118,7 +118,7 @@ typedef struct {
 
 	sdb_time_t last_update;
 	sdb_time_t interval;
-	char **backends;
+	const char * const *backends;
 	size_t backends_num;
 } sdb_store_host_t;
 
@@ -131,7 +131,7 @@ typedef struct {
 
 	sdb_time_t last_update;
 	sdb_time_t interval;
-	char **backends;
+	const char * const *backends;
 	size_t backends_num;
 } sdb_store_service_t;
 
@@ -156,7 +156,7 @@ typedef struct {
 
 	sdb_time_t last_update;
 	sdb_time_t interval;
-	char **backends;
+	const char * const *backends;
 	size_t backends_num;
 } sdb_store_metric_t;
 
@@ -172,7 +172,7 @@ typedef struct {
 
 	sdb_time_t last_update;
 	sdb_time_t interval;
-	char **backends;
+	const char * const *backends;
 	size_t backends_num;
 } sdb_store_attribute_t;
 
@@ -288,15 +288,12 @@ typedef struct {
 	 * execute_query:
 	 * Execute a previously prepared query. The callback may expect that only
 	 * queries prepared by its respective prepare callback will be passed to
-	 * this function.
-	 *
-	 * TODO: Instead of letting the executor write directly to a string buffer
-	 *       (which cannot easily be merged with other results), let it hand
-	 *       all objects to a store-writer.
+	 * this function. The query result will be passed back via the specified
+	 * store writer.
 	 */
 	int (*execute_query)(sdb_object_t *q,
-			sdb_strbuf_t *buf, sdb_strbuf_t *errbuf,
-			sdb_object_t *user_data);
+			sdb_store_writer_t *w, sdb_object_t *wd,
+			sdb_strbuf_t *errbuf, sdb_object_t *user_data);
 } sdb_store_reader_t;
 
 /*
@@ -462,7 +459,7 @@ sdb_store_query_prepare_matcher(sdb_ast_node_t *ast);
  */
 int
 sdb_store_query_execute(sdb_store_t *store, sdb_store_query_t *m,
-		sdb_strbuf_t *buf, sdb_strbuf_t *errbuf);
+		sdb_store_writer_t *w, sdb_object_t *wd, sdb_strbuf_t *errbuf);
 
 /*
  * sdb_store_expr_create:
@@ -731,13 +728,12 @@ sdb_store_json_formatter_t *
 sdb_store_json_formatter(sdb_strbuf_t *buf, int type, int flags);
 
 /*
- * sdb_store_json_emit:
+ * sdb_store_emit:
  * Serialize a single object to JSON adding it to the string buffer associated
  * with the formatter object. The serialized object will not include
  * attributes or any child objects. Instead, call the function again for each
  * of those objects. All attributes have to be emitted before any other
- * children types. Use sdb_store_json_emit_full() to emit a full (filtered)
- * object.
+ * children types. Use sdb_store_emit_full() to emit a full (filtered) object.
  *
  * Note that the output might not be valid JSON before calling
  * sdb_store_json_finish().
@@ -747,10 +743,10 @@ sdb_store_json_formatter(sdb_strbuf_t *buf, int type, int flags);
  *  - a negative value else
  */
 int
-sdb_store_json_emit(sdb_store_json_formatter_t *f, sdb_store_obj_t *obj);
+sdb_store_emit(sdb_store_obj_t *obj, sdb_store_writer_t *w, sdb_object_t *wd);
 
 /*
- * sdb_store_json_emit_full:
+ * sdb_store_emit_full:
  * Serialize a single object including it's attributes and all children to
  * JSON, adding it to the string buffer associated with the formatter object.
  * The filter, if specified, is applied to each attribute and child object.
@@ -764,8 +760,8 @@ sdb_store_json_emit(sdb_store_json_formatter_t *f, sdb_store_obj_t *obj);
  *  - a negative value else
  */
 int
-sdb_store_json_emit_full(sdb_store_json_formatter_t *f, sdb_store_obj_t *obj,
-		sdb_store_matcher_t *filter);
+sdb_store_emit_full(sdb_store_obj_t *obj, sdb_store_matcher_t *filter,
+		sdb_store_writer_t *w, sdb_object_t *wd);
 
 /*
  * sdb_store_json_finish:
@@ -775,6 +771,13 @@ 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