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feat(core): introduce NgModuleRef.destroy and call ngOnDestroy on all providers

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This commit is contained in:
Tobias Bosch
2016-08-02 02:08:10 -07:00
parent c161ed415d
commit ecdaded25f
3 changed files with 104 additions and 3 deletions
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33
modules/@angular/core/src/linker/ng_module_factory.ts
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@ -7,12 +7,14 @@
*/
import {Injector, THROW_IF_NOT_FOUND} from '../di/injector';
import {unimplemented} from '../facade/exceptions';
import {ConcreteType} from '../facade/lang';
import {BaseException, unimplemented} from '../facade/exceptions';
import {ConcreteType, stringify} from '../facade/lang';
import {ComponentFactory} from './component_factory';
import {CodegenComponentFactoryResolver, ComponentFactoryResolver} from './component_factory_resolver';
/**
* Represents an instance of an NgModule created via a {@link NgModuleFactory}.
*
@ -37,6 +39,16 @@ export abstract class NgModuleRef<T> {
* The NgModule instance.
*/
get instance(): T { return unimplemented(); }
/**
* Destroys the module instance and all of the data structures associated with it.
*/
abstract destroy(): void;
/**
* Allows to register a callback that will be called when the module is destroyed.
*/
abstract onDestroy(callback: () => void): void;
}
/**
@ -64,6 +76,9 @@ const _UNDEFINED = new Object();
export abstract class NgModuleInjector<T> extends CodegenComponentFactoryResolver implements
Injector,
NgModuleRef<T> {
private _destroyListeners: (() => void)[] = [];
private _destroyed: boolean = false;
public instance: T;
constructor(public parent: Injector, factories: ComponentFactory<any>[]) {
@ -87,4 +102,18 @@ export abstract class NgModuleInjector<T> extends CodegenComponentFactoryResolve
get injector(): Injector { return this; }
get componentFactoryResolver(): ComponentFactoryResolver { return this; }
destroy(): void {
if (this._destroyed) {
throw new BaseException(
`This module is already destroyed (${stringify(this.instance.constructor)})`);
}
this._destroyed = true;
this.destroyInternal();
this._destroyListeners.forEach((listener) => listener());
}
onDestroy(callback: () => void): void { this._destroyListeners.push(callback); }
abstract destroyInternal(): void;
}