1 files changed, 143 insertions, 0 deletions
diff --git a/exporting/exporting_engine.c b/exporting/exporting_engine.c
new file mode 100644
index 000000000..6a1320cd1
--- /dev/null
+++ b/exporting/exporting_engine.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "exporting_engine.h"
+
+static struct engine *engine = NULL;
+
+/**
+ * Exporting Clean Engine
+ *
+ * Clean all variables allocated inside engine structure
+ *
+ * @param en a pointer to the strcuture that will be cleaned.
+ */
+static void exporting_clean_engine()
+{
+    if (!engine)
+        return;
+
+#if HAVE_KINESIS
+    if (engine->aws_sdk_initialized)
+        aws_sdk_shutdown();
+#endif
+
+#if ENABLE_PROMETHEUS_REMOTE_WRITE
+    if (engine->protocol_buffers_initialized)
+        protocol_buffers_shutdown();
+#endif
+
+    //Cleanup web api
+    prometheus_clean_server_root();
+
+    for (struct instance *instance = engine->instance_root; instance;) {
+        struct instance *current_instance = instance;
+        instance = instance->next;
+
+        clean_instance(current_instance);
+    }
+
+    freez((void *)engine->config.hostname);
+    freez(engine);
+}
+
+/**
+ * Clean up the main exporting thread and all connector workers on Netdata exit
+ *
+ * @param ptr thread data.
+ */
+static void exporting_main_cleanup(void *ptr)
+{
+    struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
+    static_thread->enabled = NETDATA_MAIN_THREAD_EXITING;
+
+    info("cleaning up...");
+
+    if (!engine) {
+        static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
+        return;
+    }
+
+    engine->exit = 1;
+
+    int found = 0;
+    usec_t max = 2 * USEC_PER_SEC, step = 50000;
+
+    for (struct instance *instance = engine->instance_root; instance; instance = instance->next) {
+        if (!instance->exited) {
+            found++;
+            info("stopping worker for instance %s", instance->config.name);
+            uv_mutex_unlock(&instance->mutex);
+            instance->data_is_ready = 1;
+            uv_cond_signal(&instance->cond_var);
+        } else
+            info("found stopped worker for instance %s", instance->config.name);
+    }
+
+    while (found && max > 0) {
+        max -= step;
+        info("Waiting %d exporting connectors to finish...", found);
+        sleep_usec(step);
+        found = 0;
+
+        for (struct instance *instance = engine->instance_root; instance; instance = instance->next) {
+            if (!instance->exited)
+                found++;
+        }
+    }
+
+    exporting_clean_engine();
+    static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
+}
+
+/**
+ * Exporting engine main
+ *
+ * The main thread used to control the exporting engine.
+ *
+ * @param ptr a pointer to netdata_static_structure.
+ *
+ * @return It always returns NULL.
+ */
+void *exporting_main(void *ptr)
+{
+    netdata_thread_cleanup_push(exporting_main_cleanup, ptr);
+
+    engine = read_exporting_config();
+    if (!engine) {
+        info("EXPORTING: no exporting connectors configured");
+        goto cleanup;
+    }
+
+    if (init_connectors(engine) != 0) {
+        error("EXPORTING: cannot initialize exporting connectors");
+        send_statistics("EXPORTING_START", "FAIL", "-");
+        goto cleanup;
+    }
+
+    RRDSET *st_main_rusage = NULL;
+    RRDDIM *rd_main_user = NULL;
+    RRDDIM *rd_main_system = NULL;
+    create_main_rusage_chart(&st_main_rusage, &rd_main_user, &rd_main_system);
+
+    usec_t step_ut = localhost->rrd_update_every * USEC_PER_SEC;
+    heartbeat_t hb;
+    heartbeat_init(&hb);
+
+    while (!netdata_exit) {
+        heartbeat_next(&hb, step_ut);
+        engine->now = now_realtime_sec();
+
+        if (mark_scheduled_instances(engine))
+            prepare_buffers(engine);
+
+        send_main_rusage(st_main_rusage, rd_main_user, rd_main_system);
+
+#ifdef UNIT_TESTING
+        return NULL;
+#endif
+    }
+
+cleanup:
+    netdata_thread_cleanup_pop(1);
+    return NULL;
+}