Extend Error and simplify.

Author: skh

x-pack/plugins/ingest_manager/server/errors.ts

@@ -4,26 +4,19 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-export class IngestManagerError {
-  private type: IngestManagerErrorType;
-  private message: string;
+export class IngestManagerError extends Error {
+  public type: IngestManagerErrorType;
+  public message: string;
 
   constructor(type: IngestManagerErrorType, message: string) {
+    super(message);
     this.type = type;
     this.message = message;
   }
-
-  public getType = (): IngestManagerErrorType => {
-    return this.type;
-  };
-
-  public getMessage = (): string => {
-    return this.message;
-  };
 }
 
 export const getHTTPResponseCode = (error: IngestManagerError): number => {
-  switch (error.getType()) {
+  switch (error.type) {
     case IngestManagerErrorType.RegistryError:
       return 502; // Bad Gateway
     default:

x-pack/plugins/ingest_manager/server/routes/setup/handlers.ts

@@ -83,10 +83,10 @@ export const ingestManagerSetupHandler: RequestHandler = async (context, request
     });
   } catch (e) {
     if (e instanceof IngestManagerError) {
-      logger.error(e.getMessage());
+      logger.error(e.message);
       return response.customError({
         statusCode: getHTTPResponseCode(e),
-        body: { message: e.getMessage() },
+        body: { message: e.message },
       });
     }
     if (e.isBoom) {