out_stdout: Fix incomplete printing of traces

This patch fixes print_traces_text() function to print all ctrace contexts

the patch has been tested with opentelemetry-cpp-1.12.0/example_otlp_http
http://localhost:4318/v1/traces DEBUG=yes bin, fluent-bit 2.2.0 and ctrace fix
(fluent/ctraces#46)

Signed-off-by: Srinivasan J <[email protected]>

Author: srini38

plugins/out_stdout/stdout.c

@@ -135,24 +135,26 @@ static void print_traces_text(struct flb_output_instance *ins,
     size_t off = 0;
     cfl_sds_t text;
     struct ctrace *ctr = NULL;
+    int ok = CTR_DECODE_MSGPACK_SUCCESS;
 
-    /* get cmetrics context */
-    ret = ctr_decode_msgpack_create(&ctr, (char *) data, bytes, &off);
-    if (ret != 0) {
-        flb_plg_error(ins, "could not process traces payload (ret=%i)", ret);
-        return;
-    }
-
-    /* convert to text representation */
-    text = ctr_encode_text_create(ctr);
+    /* Decode each ctrace context */
+    while ((ret = ctr_decode_msgpack_create(&ctr,
+                                            (char *) data,
+                                            bytes, &off)) == ok) {
+        /* convert to text representation */
+        text = ctr_encode_text_create(ctr);
 
-    /* destroy cmt context */
-    ctr_destroy(ctr);
+        /* destroy ctr context */
+        ctr_destroy(ctr);
 
-    printf("%s", text);
-    fflush(stdout);
+        printf("%s", text);
+        fflush(stdout);
 
-    ctr_encode_text_destroy(text);
+        ctr_encode_text_destroy(text);
+    }
+    if (ret != ok) {
+        flb_plg_debug(ins, "ctr decode msgpack returned : %d", ret);
+    }
 }
 
 static void cb_stdout_flush(struct flb_event_chunk *event_chunk,