javascript - 循环依赖，当 ovveriding ExceptionHandler-6ren

javascript - 循环依赖，当 ovveriding ExceptionHandler

转载作者：行者123 更新时间：2023-11-30 16:01:59

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我有这个代码:

import {Injectable, ExceptionHandler, SkipSelf, Host, Optional} from     '@angular/core';
import {ToastNotification} from '../toast-messages/toastNotification.service';

export class UIError extends Error {
    constructor (private toastMessage: string) {
        super();
        this.toastMessage = toastMessage;
    }
}

export class MyUIError extends UIError {}
export class AnotherError extends UIError {}

export class _ArrayLogger {
    res = [];
    log(s: any): void { this.res.push(s); }
    logError(s: any): void { this.res.push(s); }
    logGroup(s: any): void { this.res.push(s); }
    logGroupEnd() {};
}

export class ConsoleLogger {
    log(s: any): void {console.log(s);}
}

@Injectable()
export class CustomExceptionHandler extends ExceptionHandler {
    constructor(private logger: ConsoleLogger, private toast: ToastNotification) {
        super (new _ArrayLogger(), true);
    }

    call(exception: any, stackTrace = null, reason = null) {
        let self = this;
        if (exception.originalException instanceof UIError) {
            self.toast.Error(exception.originalException.toastMessage);
        } else {
            this.logger.log(exception);
        }
    }
}

当我尝试运行它时，我遇到了 toast 问题:ToastNotification。我得到的错误是:

zone.js:260Uncaught EXCEPTION: Error during instantiation of ApplicationRef_! (ApplicationRef -> ApplicationRef_).
ORIGINAL EXCEPTION: Cannot instantiate cyclic dependency! (ExceptionHandler -> ToastNotification)
ORIGINAL STACKTRACE:
Error: DI Exception
    at CyclicDependencyError.BaseException

我也在 boostrap 中注入(inject)了这个组件。如何解决？