[Cases] Case action: Error handling and retries

x-pack/plugins/cases/server/connectors/cases/cases_connector_error.ts

@@ -0,0 +1,24 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { CaseError } from '../../common/error';
+
+export class CasesConnectorError extends Error {
+  public readonly statusCode: number;
+
+  constructor(message: string, statusCode: number) {
+    super(message);
+
+    this.statusCode = statusCode;
+  }
+}
+
+export const isCasesConnectorError = (error: unknown): error is CasesConnectorError =>
+  error instanceof CasesConnectorError;
+
+export const isCasesClientError = (error: unknown): error is CaseError =>
+  error instanceof CaseError;