[component] Bump maximum length for component names to 1024 characters (open-telemetry#10818)

#### Description

Bumps component name length limit to 1024 characters.

#### Link to tracking issue

Fixes open-telemetry#10816

#### Testing

Added some unit tests.

Author: mx-psi

.chloggen/mx-psi_limit-for-component-names.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: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: component
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Allow component names of up to 1024 characters in length.
+
+# One or more tracking issues or pull requests related to the change
+issues: [10816]
+
+# (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: []

component/config.go

@@ -166,11 +166,14 @@ var (
 )
 
 // nameRegexp is used to validate the name of a component. A name can consist of
-// 1 to 63 unicode characters excluding whitespace, control characters, and
+// 1 to 1024 unicode characters excluding whitespace, control characters, and
 // symbols.
-var nameRegexp = regexp.MustCompile(`^[^\pZ\pC\pS]{1,63}$`)
+var nameRegexp = regexp.MustCompile(`^[^\pZ\pC\pS]+$`)
 
 func validateName(nameStr string) error {
+	if len(nameStr) > 1024 {
+		return fmt.Errorf("name %q is longer than 1024 characters (%d characters)", nameStr, len(nameStr))
+	}
 	if !nameRegexp.MatchString(nameStr) {
 		return fmt.Errorf("invalid character(s) in name %q", nameStr)
 	}

component/identifiable_test.go

@@ -4,6 +4,7 @@
 package component
 
 import (
+	"strings"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -43,6 +44,11 @@ func TestUnmarshalText(t *testing.T) {
 			idStr:      "valid_type/name-with-dashes",
 			expectedID: ID{typeVal: validType, nameVal: "name-with-dashes"},
 		},
+		// issue 10816
+		{
+			idStr:      "valid_type/Linux-Messages-File_01J49HCH3SWFXRVASWFZFRT3J2__processor0__logs",
+			expectedID: ID{typeVal: validType, nameVal: "Linux-Messages-File_01J49HCH3SWFXRVASWFZFRT3J2__processor0__logs"},
+		},
 		{
 			idStr:      "valid_type/1",
 			expectedID: ID{typeVal: validType, nameVal: "1"},
@@ -71,6 +77,10 @@ func TestUnmarshalText(t *testing.T) {
 			idStr:       "valid_type/invalid name",
 			expectedErr: true,
 		},
+		{
+			idStr:       "valid_type/" + strings.Repeat("a", 1025),
+			expectedErr: true,
+		},
 	}
 
 	for _, test := range testCases {