|
|
import { IDestroyable, MapOf } from "../interfaces";
|
|
|
import { argumentNotNull, isDestroyable, argumentNotEmptyString } from "../safe";
|
|
|
import { ILifetime, ServiceContainer } from "./interfaces";
|
|
|
import { ActivationContext } from "./ActivationContext";
|
|
|
|
|
|
function safeCall(item: () => void) {
|
|
|
try {
|
|
|
item();
|
|
|
} catch {
|
|
|
// silence!
|
|
|
}
|
|
|
}
|
|
|
|
|
|
const emptyLifetime: ILifetime = Object.freeze({
|
|
|
has() {
|
|
|
return false;
|
|
|
},
|
|
|
|
|
|
initialize() {
|
|
|
|
|
|
},
|
|
|
|
|
|
get() {
|
|
|
throw new Error("The specified item isn't registered with this lifetime manager");
|
|
|
},
|
|
|
|
|
|
store() {
|
|
|
// does nothing
|
|
|
}
|
|
|
|
|
|
});
|
|
|
|
|
|
const unknownLifetime: ILifetime = Object.freeze({
|
|
|
has() {
|
|
|
return false;
|
|
|
},
|
|
|
initialize() {
|
|
|
throw new Error("Can't call initialize on the unknown lifetime object");
|
|
|
},
|
|
|
get() {
|
|
|
throw new Error("The lifetime object isn't initialized");
|
|
|
},
|
|
|
store() {
|
|
|
throw new Error("Can't store a value in the unknown lifetime object");
|
|
|
}
|
|
|
});
|
|
|
|
|
|
let nextId = 0;
|
|
|
|
|
|
const singletons: any = {};
|
|
|
|
|
|
export class LifetimeManager implements IDestroyable {
|
|
|
private _cleanup: (() => void)[] = [];
|
|
|
private _cache: MapOf<any> = {};
|
|
|
private _destroyed = false;
|
|
|
|
|
|
private _pending: MapOf<boolean> = {};
|
|
|
|
|
|
create(): ILifetime {
|
|
|
const self = this;
|
|
|
const id = ++nextId;
|
|
|
return {
|
|
|
has() {
|
|
|
return (id in self._cache);
|
|
|
},
|
|
|
|
|
|
get() {
|
|
|
const t = self._cache[id];
|
|
|
if (t === undefined)
|
|
|
throw new Error(`The item with with the key ${id} isn't found`);
|
|
|
return t;
|
|
|
},
|
|
|
|
|
|
initialize() {
|
|
|
if (self._pending[id])
|
|
|
throw Error(`Cyclic reference detected: the item with the key ${id} is already activating.`);
|
|
|
self._pending[id] = true;
|
|
|
},
|
|
|
|
|
|
store(item: any, cleanup?: (item: any) => void) {
|
|
|
argumentNotNull(id, "id");
|
|
|
argumentNotNull(item, "item");
|
|
|
|
|
|
if (this.has())
|
|
|
throw new Error(`The item with with the key ${id} already registered with this lifetime manager`);
|
|
|
delete self._pending[id];
|
|
|
|
|
|
self._cache[id] = item;
|
|
|
|
|
|
if (self._destroyed)
|
|
|
throw new Error("Lifetime manager is destroyed");
|
|
|
if (cleanup) {
|
|
|
self._cleanup.push(() => cleanup(item));
|
|
|
} else if (isDestroyable(item)) {
|
|
|
self._cleanup.push(() => item.destroy());
|
|
|
}
|
|
|
}
|
|
|
};
|
|
|
}
|
|
|
|
|
|
destroy() {
|
|
|
if (!this._destroyed) {
|
|
|
this._destroyed = true;
|
|
|
this._cleanup.forEach(safeCall);
|
|
|
this._cleanup.length = 0;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
static empty(): ILifetime {
|
|
|
return emptyLifetime;
|
|
|
}
|
|
|
|
|
|
static hierarchyLifetime(): ILifetime {
|
|
|
let _lifetime = unknownLifetime;
|
|
|
return {
|
|
|
initialize(context: ActivationContext<any>) {
|
|
|
if (_lifetime !== unknownLifetime)
|
|
|
throw new Error("Cyclic reference activation detected");
|
|
|
|
|
|
_lifetime = context.getContainer().getLifetimeManager().create();
|
|
|
},
|
|
|
get() {
|
|
|
return _lifetime.get();
|
|
|
},
|
|
|
has() {
|
|
|
return _lifetime.has();
|
|
|
},
|
|
|
store(item: any, cleanup?: (item: any) => void) {
|
|
|
return _lifetime.store(item, cleanup);
|
|
|
}
|
|
|
};
|
|
|
}
|
|
|
|
|
|
static contextLifetime(): ILifetime {
|
|
|
let _lifetime = unknownLifetime;
|
|
|
return {
|
|
|
initialize(context: ActivationContext<any>) {
|
|
|
if (_lifetime !== unknownLifetime)
|
|
|
throw new Error("Cyclic reference detected");
|
|
|
_lifetime = context.createLifetime();
|
|
|
},
|
|
|
get() {
|
|
|
return _lifetime.get();
|
|
|
},
|
|
|
has() {
|
|
|
return _lifetime.has();
|
|
|
},
|
|
|
store(item: any) {
|
|
|
_lifetime.store(item);
|
|
|
}
|
|
|
};
|
|
|
}
|
|
|
|
|
|
static singletonLifetime(typeId: string): ILifetime {
|
|
|
argumentNotEmptyString(typeId, "typeId");
|
|
|
let pending = false;
|
|
|
return {
|
|
|
has() {
|
|
|
return typeId in singletons;
|
|
|
},
|
|
|
get() {
|
|
|
if (!this.has())
|
|
|
throw new Error(`The instance ${typeId} doesn't exists`);
|
|
|
return singletons[typeId];
|
|
|
},
|
|
|
initialize() {
|
|
|
if (pending)
|
|
|
throw new Error("Cyclic reference detected");
|
|
|
pending = true;
|
|
|
},
|
|
|
store(item: any) {
|
|
|
singletons[typeId] = item;
|
|
|
pending = false;
|
|
|
}
|
|
|
};
|
|
|
}
|
|
|
|
|
|
static containerLifetime(container: ServiceContainer<any>) {
|
|
|
let _lifetime = unknownLifetime;
|
|
|
return {
|
|
|
initialize(context: ActivationContext<any>) {
|
|
|
if (_lifetime !== unknownLifetime)
|
|
|
throw new Error("Cyclic reference detected");
|
|
|
_lifetime = container.getLifetimeManager().create();
|
|
|
},
|
|
|
get() {
|
|
|
return _lifetime.get();
|
|
|
},
|
|
|
has() {
|
|
|
return _lifetime.has();
|
|
|
},
|
|
|
store(item: any) {
|
|
|
_lifetime.store(item);
|
|
|
}
|
|
|
};
|
|
|
}
|
|
|
}
|
|
|
|
