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@eggjs/tegg-aop-plugin
Advanced tools
// plugin.js
export.aopModule = {
enable: true,
package: '@eggjs/tegg-aop-plugin',
};
使用 @Advice 注解来申明一个实现,可以用来监听、拦截方法执行。
注意:Advice 也是一种 Prototype,可以通过 initType 来指定不同的生命周期。
import { Advice, IAdvice } from '@eggjs/tegg/aop';
@Advice()
export class AdviceExample implements IAdvice {
// Advice 中可以正常的注入其他的对象
@Inject()
private readonly callTrace: CallTrace;
// 在函数执行前执行
async beforeCall(ctx: AdviceContext): Promise<void> {
// ...
}
// 在函数成功后执行
async afterReturn(ctx: AdviceContext, result: any): Promise<void> {
// ...
}
// 在函数成功后执行
async afterThrow(ctx: AdviceContext, error: Error): Promise<void> {
// ...
}
// 在函数退出时执行
async afterFinally(ctx: AdviceContext): Promise<void> {
}
// 类似 koa 中间件的模式
// block = next
async around(ctx: AdviceContext, next: () => Promise<any>): Promise<any> {
}
}
使用 @Pointcut 在某个类特定的方法上申明一个 Advice
import { Pointcut } from '@eggjs/tegg/aop';
import { ContextProto } from '@eggjs/tegg';
@ContextProto()
export class Hello {
// 创建 Hello.hello 的切面 AdviceExample,并传递 adviceParams 给 AdviceExample
// AdviceExample 的切面函数可以通过 ctx.adviceParams 拿到注解传入的参数
@Pointcut(AdviceExample, { adviceParams: { foo: 'bar' } })
async hello(name: string) {
return `hello ${name}`;
}
}
使用 @Crosscut 来声明一个通用的 Advice,有三种模式
注意:egg 中的对象无法被 Crosscut 指定到。
import { Crosscut, Advice, IAdvice } from '@eggjs/tegg/aop';
// 通过类型来指定
// 创建 CrosscutClassAdviceExample.hello 的切面 CrosscutExample,并传递 adviceParams 给 CrosscutExample
// CrosscutExample 的切面函数可以通过 ctx.adviceParams 拿到注解传入的参数
@Crosscut({
type: PointcutType.CLASS,
clazz: CrosscutExample,
methodName: 'hello',
}, { adviceParams: { foo: 'bar' } })
@Advice()
export class CrosscutClassAdviceExample implements IAdvice {
}
// 通过正则来指定
@Crosscut({
type: PointcutType.NAME,
className: /crosscut.*/i,
methodName: /hello/,
})
@Advice()
export class CrosscutNameAdviceExample implements IAdvice {
}
// 通过回调来指定
@Crosscut({
type: PointcutType.CUSTOM,
callback: (clazz: EggProtoImplClass, method: PropertyKey) => {
return clazz === CrosscutExample && method === 'hello';
}
})
@Advice()
****export class CrosscutCustomAdviceExample implements IAdvice {
}
FAQs
tegg aop plugin
The npm package @eggjs/tegg-aop-plugin receives a total of 457 weekly downloads. As such, @eggjs/tegg-aop-plugin popularity was classified as not popular.
We found that @eggjs/tegg-aop-plugin demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 8 open source maintainers collaborating on the project.
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