refactor: create a void logger service impl

Signed-off-by: Camila Belo <camilaibs@gmail.com>

packages/backend-app-api/api-report.md

@@ -347,6 +347,22 @@ export const userInfoServiceFactory: () => ServiceFactory<
   'plugin'
 >;
 
+// @public
+export class VoidLogger implements RootLoggerService {
+  // (undocumented)
+  child(_meta: JsonObject): LoggerService;
+  // (undocumented)
+  static create(): VoidLogger;
+  // (undocumented)
+  debug(_message: string, _meta?: JsonObject): void;
+  // (undocumented)
+  error(_message: string, _meta?: JsonObject): void;
+  // (undocumented)
+  info(_message: string, _meta?: JsonObject): void;
+  // (undocumented)
+  warn(_message: string, _meta?: JsonObject): void;
+}
+
 // @public
 export class WinstonLogger implements RootLoggerService {
   // (undocumented)

packages/backend-app-api/src/logging/VoidLogger.ts

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2023 The Backstage 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.
+ */
+
+import {
+  LoggerService,
+  RootLoggerService,
+} from '@backstage/backend-plugin-api';
+import { JsonObject } from '@backstage/types';
+
+/**
+ * An empty {@link @backstage/backend-plugin-api#LoggerService} implementation.
+ *
+ * @public
+ */
+export class VoidLogger implements RootLoggerService {
+  static create(): VoidLogger {
+    return new VoidLogger();
+  }
+
+  error(_message: string, _meta?: JsonObject): void {}
+
+  warn(_message: string, _meta?: JsonObject): void {}
+
+  info(_message: string, _meta?: JsonObject): void {}
+
+  debug(_message: string, _meta?: JsonObject): void {}
+
+  child(_meta: JsonObject): LoggerService {
+    return new VoidLogger();
+  }
+}

packages/backend-app-api/src/logging/index.ts

@@ -14,5 +14,6 @@
  * limitations under the License.
  */
 
+export { VoidLogger } from './VoidLogger';
 export { WinstonLogger } from './WinstonLogger';
 export type { WinstonLoggerOptions } from './WinstonLogger';