/**
* Copyright 2017-2020 Plexus Interop Deutsche Bank AG
* SPDX-License-Identifier: Apache-2.0
*
* 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 { RetryConfig } from '../../RetryConfig';
export const defaultPromiseRetryConfig: RetryConfig = {
retriesNum: 3,
retryTimeoutInMillis: 500
};
type CatchHandler<T> = (error: any) => Promise<T>;
export function retriable<T>(
action: () => Promise<T>,
{ retriesNum, retryTimeoutInMillis, errorHandler }: RetryConfig = defaultPromiseRetryConfig): () => Promise<T> {
let count = retriesNum;
const catchHandler: CatchHandler<T> = (error) => {
if (count === 0) {
throw error;
}
if (errorHandler) {
errorHandler(error);
}
count--;
return delayed(action, retryTimeoutInMillis)
.catch(catchHandler);
};
return () => action().catch(catchHandler);
}
export function delayed<T>(action: () => Promise<T>, ItimeoutInMillis: number = defaultPromiseRetryConfig.retryTimeoutInMillis): Promise<T> {
return new Promise<T>((resolve, reject) => {
setTimeout(() => {
action()
.then(resolve)
.catch(reject);
}, timeoutInMillis);
});
} |