From def05cbc32d6aaf17589b8c27f0a8f58f0a6907d Mon Sep 17 00:00:00 2001
From: VihasMakwana <121151420+VihasMakwana@users.noreply.github.com>
Date: Wed, 2 Oct 2024 01:54:59 +0530
Subject: [PATCH] [chore]: deprecate and remove BuildProcessorMetricName
 (#11328)

This helper is no longer needed since introduction of `mdatagen`.

Relates
https://github.com/open-telemetry/opentelemetry-collector/issues/11302

---------

Co-authored-by: Bogdan Drutu <bogdandrutu@gmail.com>
---
 .../deprecate-buildprocessormetricname.yaml   | 25 +++++++++++++++++++
 processor/processorhelper/obsreport.go        |  4 +--
 2 files changed, 26 insertions(+), 3 deletions(-)
 create mode 100644 .chloggen/deprecate-buildprocessormetricname.yaml

diff --git a/.chloggen/deprecate-buildprocessormetricname.yaml b/.chloggen/deprecate-buildprocessormetricname.yaml
new file mode 100644
index 00000000000..eecce6146dd
--- /dev/null
+++ b/.chloggen/deprecate-buildprocessormetricname.yaml
@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: deprecation
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: processorhelper
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Deprecate BuildProcessorMetricName as it's no longer needed since introduction of mdatagen
+
+# One or more tracking issues or pull requests related to the change
+issues: [11302]
+
+# (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:
+
+# 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: []
diff --git a/processor/processorhelper/obsreport.go b/processor/processorhelper/obsreport.go
index 84f3f21d6a7..fd95f51fb9d 100644
--- a/processor/processorhelper/obsreport.go
+++ b/processor/processorhelper/obsreport.go
@@ -17,9 +17,7 @@ import (
 	"go.opentelemetry.io/collector/processor/processorhelper/internal/metadata"
 )
 
-// BuildCustomMetricName is used to be build a metric name following
-// the standards used in the Collector. The configType should be the same
-// value used to identify the type on the config.
+// Deprecated: [v0.111.0] no longer needed. To be removed in future.
 func BuildCustomMetricName(configType, metric string) string {
 	componentPrefix := internal.ProcessorMetricPrefix
 	if !strings.HasSuffix(componentPrefix, internal.MetricNameSep) {