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-rw-r--r--database/storage_engine.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/database/storage_engine.c b/database/storage_engine.c
new file mode 100644
index 000000000..36f01de16
--- /dev/null
+++ b/database/storage_engine.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "storage_engine.h"
+#include "ram/rrddim_mem.h"
+#ifdef ENABLE_DBENGINE
+#include "engine/rrdengineapi.h"
+#endif
+
+#define im_collect_ops { \
+ .init = rrddim_collect_init,\
+ .store_metric = rrddim_collect_store_metric,\
+ .finalize = rrddim_collect_finalize\
+}
+
+#define im_query_ops { \
+ .init = rrddim_query_init, \
+ .next_metric = rrddim_query_next_metric, \
+ .is_finished = rrddim_query_is_finished, \
+ .finalize = rrddim_query_finalize, \
+ .latest_time = rrddim_query_latest_time, \
+ .oldest_time = rrddim_query_oldest_time \
+}
+
+static STORAGE_ENGINE engines[] = {
+ {
+ .id = RRD_MEMORY_MODE_NONE,
+ .name = RRD_MEMORY_MODE_NONE_NAME,
+ .api = {
+ .collect_ops = im_collect_ops,
+ .query_ops = im_query_ops
+ }
+ },
+ {
+ .id = RRD_MEMORY_MODE_RAM,
+ .name = RRD_MEMORY_MODE_RAM_NAME,
+ .api = {
+ .collect_ops = im_collect_ops,
+ .query_ops = im_query_ops
+ }
+ },
+ {
+ .id = RRD_MEMORY_MODE_MAP,
+ .name = RRD_MEMORY_MODE_MAP_NAME,
+ .api = {
+ .collect_ops = im_collect_ops,
+ .query_ops = im_query_ops
+ }
+ },
+ {
+ .id = RRD_MEMORY_MODE_SAVE,
+ .name = RRD_MEMORY_MODE_SAVE_NAME,
+ .api = {
+ .collect_ops = im_collect_ops,
+ .query_ops = im_query_ops
+ }
+ },
+ {
+ .id = RRD_MEMORY_MODE_ALLOC,
+ .name = RRD_MEMORY_MODE_ALLOC_NAME,
+ .api = {
+ .collect_ops = im_collect_ops,
+ .query_ops = im_query_ops
+ }
+ },
+#ifdef ENABLE_DBENGINE
+ {
+ .id = RRD_MEMORY_MODE_DBENGINE,
+ .name = RRD_MEMORY_MODE_DBENGINE_NAME,
+ .api = {
+ .collect_ops = {
+ .init = rrdeng_store_metric_init,
+ .store_metric = rrdeng_store_metric_next,
+ .finalize = rrdeng_store_metric_finalize
+ },
+ .query_ops = {
+ .init = rrdeng_load_metric_init,
+ .next_metric = rrdeng_load_metric_next,
+ .is_finished = rrdeng_load_metric_is_finished,
+ .finalize = rrdeng_load_metric_finalize,
+ .latest_time = rrdeng_metric_latest_time,
+ .oldest_time = rrdeng_metric_oldest_time
+ }
+ }
+ },
+#endif
+ { .id = RRD_MEMORY_MODE_NONE, .name = NULL }
+};
+
+STORAGE_ENGINE* storage_engine_find(const char* name)
+{
+ for (STORAGE_ENGINE* it = engines; it->name; it++) {
+ if (strcmp(it->name, name) == 0)
+ return it;
+ }
+ return NULL;
+}
+
+STORAGE_ENGINE* storage_engine_get(RRD_MEMORY_MODE mmode)
+{
+ for (STORAGE_ENGINE* it = engines; it->name; it++) {
+ if (it->id == mmode)
+ return it;
+ }
+ return NULL;
+}
+
+STORAGE_ENGINE* storage_engine_foreach_init()
+{
+ // Assuming at least one engine exists
+ return &engines[0];
+}
+
+STORAGE_ENGINE* storage_engine_foreach_next(STORAGE_ENGINE* it)
+{
+ if (!it || !it->name)
+ return NULL;
+
+ it++;
+ return it->name ? it : NULL;
+}