1 files changed, 101 insertions, 0 deletions
diff --git a/fluent-bit/src/flb_input_metric.c b/fluent-bit/src/flb_input_metric.c
new file mode 100644
index 00000000..f332d420
--- /dev/null
+++ b/fluent-bit/src/flb_input_metric.c
@@ -0,0 +1,101 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/*  Fluent Bit
+ *  ==========
+ *  Copyright (C) 2015-2022 The Fluent Bit Authors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include <fluent-bit/flb_info.h>
+#include <fluent-bit/flb_input.h>
+#include <fluent-bit/flb_input_chunk.h>
+#include <fluent-bit/flb_input_metric.h>
+#include <fluent-bit/flb_input_plugin.h>
+
+static int input_metrics_append(struct flb_input_instance *ins,
+                                size_t processor_starting_stage,
+                                const char *tag, size_t tag_len,
+                                struct cmt *cmt)
+{
+    int ret;
+    char *mt_buf;
+    size_t mt_size;
+    int processor_is_active;
+
+    processor_is_active = flb_processor_is_active(ins->processor);
+    if (processor_is_active) {
+        if (!tag) {
+            if (ins->tag && ins->tag_len > 0) {
+                tag = ins->tag;
+                tag_len = ins->tag_len;
+            }
+            else {
+                tag = ins->name;
+                tag_len = strlen(ins->name);
+            }
+        }
+
+        ret = flb_processor_run(ins->processor,
+                                processor_starting_stage,
+                                FLB_PROCESSOR_METRICS,
+                                tag,
+                                tag_len,
+                                (char *) cmt,
+                                0, NULL, NULL);
+
+        if (ret == -1) {
+            return -1;
+        }
+    }
+
+    /* Convert metrics to msgpack */
+    ret = cmt_encode_msgpack_create(cmt, &mt_buf, &mt_size);
+    if (ret != 0) {
+        flb_plg_error(ins, "could not encode metrics");
+        return -1;
+
+    }
+
+    /* Append packed metrics */
+    ret = flb_input_chunk_append_raw(ins, FLB_INPUT_METRICS, 0,
+                                     tag, tag_len, mt_buf, mt_size);
+
+    cmt_encode_msgpack_destroy(mt_buf);
+
+    return ret;
+}
+
+/* Take a metric context and enqueue it as a Metric's Chunk */
+int flb_input_metrics_append(struct flb_input_instance *ins,
+                             const char *tag, size_t tag_len,
+                             struct cmt *cmt)
+{
+    return input_metrics_append(ins,
+                                0,
+                                tag, tag_len,
+                                cmt);
+}
+
+/* Take a metric context and enqueue it as a Metric's Chunk */
+int flb_input_metrics_append_skip_processor_stages(
+        struct flb_input_instance *ins,
+        size_t processor_starting_stage,
+        const char *tag, size_t tag_len,
+        struct cmt *cmt)
+{
+    return input_metrics_append(ins,
+                                processor_starting_stage,
+                                tag, tag_len,
+                                cmt);
+}