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| import { useEffect, useMemo } from "react";
type AsyncFunc<T, U> = (...args: T[]) => Promise<U>;
type FunctionStatus = 'init' | 'running' | 'stoped' | 'success' | 'fail';
type FunctionStatusChangeCallback<R> = (status: FunctionStatus, result?: R) => void;
interface RetryableFunctionParams<R> {
count?: number;
timeout?: number;
retryDuration?: number;
errorConsumeCount?: boolean;
callback?: FunctionStatusChangeCallback<R>
}
class Retryable<T, U> {
private fn: AsyncFunc<T, U>;
private maxRetries: number;
private retries: number;
private errorConsumeCount: boolean;
private startTime: number;
private timeout: number;
private args: T[];
private retryDuration: number;
private planToStop: boolean;
private resolve: ((value: U | PromiseLike<U>) => void) | null;
private reject: ((reason?: any) => void) | null;
private status: FunctionStatus;
private callback?: FunctionStatusChangeCallback<U>;
constructor(fn: AsyncFunc<T, U>, params: RetryableFunctionParams<U>) {
this.fn = fn;
this.callback = params.callback;
this.maxRetries = params.count ?? 3;
this.retries = params.count ?? 3;
this.retryDuration = params.retryDuration ?? 500;
this.errorConsumeCount = params.errorConsumeCount;
this.startTime = new Date().getTime();
this.timeout = params.timeout ?? 1000;
this.args = [];
this.planToStop = false;
this.resolve = null;
this.reject = null;
this.changeStatus('init');
}
getStatus = () => {
return this.status;
};
stop = (): void => {
this.planToStop = true;
if (this.status !== 'running') {
this.changeStatus('stoped');
}
};
continueRun = (resetTimeout?: boolean): boolean => {
if (resetTimeout) {
this.startTime = new Date().getTime();
}
if (this.canRetry() && this.status === 'success') {
setTimeout(() => {
this.execute();
}, this.retryDuration);
return true;
}
return false;
};
restart = (...args: T[]): Promise<U> => {
if (this.planToStop) return;
this.retries = this.maxRetries;
this.startTime = new Date().getTime();
this.args = args;
return new Promise<U>((resolve, reject) => {
this.resolve = resolve;
this.reject = reject;
this.execute();
});
};
resetFunc = (fn: AsyncFunc<T, U>): void => {
this.fn = fn;
};
private canRetry() {
return !this.planToStop && this.retries > 0 && (new Date().getTime() - this.startTime < this.timeout);
}
private changeStatus: FunctionStatusChangeCallback<U> = (status, result) => {
this.status = status;
this.callback?.(status, result);
};
private execute = async (): Promise<void> => {
try {
if (this.planToStop) {
this.changeStatus('stoped');
return;
}
this.changeStatus('running');
this.retries--;
const result = await this.fn(...this.args);
this.resolve && this.resolve(result);
if (this.planToStop) {
this.changeStatus('stoped', result);
return;
}
this.changeStatus('success', result);
} catch (error) {
if (!this.errorConsumeCount) {
this.retries++;
}
if (this.planToStop) {
this.changeStatus('stoped');
return;
}
if (this.canRetry()) {
setTimeout(() => {
this.execute();
}, this.retryDuration);
} else {
this.reject && this.reject(error);
this.changeStatus('fail');
}
}
};
}
export function useRetryableAsyncFunc<T, U>(fn: AsyncFunc<T, U>, params: RetryableFunctionParams<U>) {
const retryAble = useMemo(() => {
return new Retryable(fn, params);
}, []);
useEffect(() => {
retryAble.resetFunc(fn);
}, [fn]);
return retryAble;
}
|
