[chore] unexport DurationAsMicroseconds (#26565)

Linked issue #26304

Signed-off-by: Jared Tan <jian.tan@daocloud.io>

.chloggen/esexporter-checkapi.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: elasticsearchexporter
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Do not export the function `DurationAsMicroseconds`
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [26304]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [api]

cmd/checkapi/allowlist.txt

@@ -4,7 +4,6 @@ exporter/awskinesisexporter
 exporter/azuremonitorexporter
 exporter/coralogixexporter
 exporter/dynatraceexporter
-exporter/elasticsearchexporter
 exporter/f5cloudexporter
 exporter/kafkaexporter
 exporter/loadbalancingexporter

exporter/elasticsearchexporter/model.go

@@ -75,7 +75,7 @@ func (m *encodeModel) encodeSpan(resource pcommon.Resource, span ptrace.Span) ([
 	document.AddAttributes("Attributes", span.Attributes())
 	document.AddAttributes("Resource", resource.Attributes())
 	document.AddEvents("Events", span.Events())
-	document.AddInt("Duration", DurationAsMicroseconds(span.StartTimestamp().AsTime(), span.EndTimestamp().AsTime())) // unit is microseconds
+	document.AddInt("Duration", durationAsMicroseconds(span.StartTimestamp().AsTime(), span.EndTimestamp().AsTime())) // unit is microseconds
 
 	if m.dedup {
 		document.Dedup()
@@ -102,8 +102,8 @@ func spanLinksToString(spanLinkSlice ptrace.SpanLinkSlice) string {
 	return string(linkArrayBytes)
 }
 
-// DurationAsMicroseconds calculate span duration through end - start nanoseconds and converts time.Time to microseconds,
+// durationAsMicroseconds calculate span duration through end - start nanoseconds and converts time.Time to microseconds,
 // which is the format the Duration field is stored in the Span.
-func DurationAsMicroseconds(start, end time.Time) int64 {
+func durationAsMicroseconds(start, end time.Time) int64 {
 	return (end.UnixNano() - start.UnixNano()) / 1000
 }