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@@ -0,0 +1,61
1 import { ILifetimeSlot } from "../typings/interfaces";
2 import { isDestroyable } from "./traits";
3
4 const _destroy = (item: unknown) => () => isDestroyable(item) && item.destroy();
5
6 enum State {
7 New,
8
9 Initialized,
10
11 Destroyed
12 }
13
14 export class LifetimeSlot<T> implements ILifetimeSlot<T> {
15 private _value: NonNullable<T> | undefined = undefined;
16
17 private _state = State.New;
18
19 cleanup: () => void;
20
21 readonly remove: () => void;
22
23 constructor(remove: () => void) {
24 this.remove = this._finalizer(remove);
25 this.cleanup = this._finalizer(() => { });
26 }
27
28 has(): boolean {
29 this._assertNotDisposed();
30 return this._value !== undefined;
31 }
32 get(): NonNullable<T> {
33 this._assertNotDisposed();
34 if (this._value === undefined)
35 throw new Error("The slot doesn't have a value");
36 return this._value;
37 }
38
39 initialize(): boolean {
40 return this._state === State.New ?
41 (this._state = State.Initialized, true) :
42 false;
43 }
44
45 store(item: NonNullable<T>, cleanup: ((item: NonNullable<T>) => void) | undefined = _destroy): void {
46 this._assertNotDisposed();
47 this._value = item;
48 if (cleanup)
49 this.cleanup = this._finalizer(() => cleanup(item));
50 }
51
52 private _finalizer(cb: () => void) {
53 return () => this._state !== State.Destroyed ? (this._state = State.Destroyed, cb()) : void (0);
54 }
55
56 private _assertNotDisposed() {
57 if (this._state === State.Destroyed)
58 throw new Error("The slot is disposed");
59 }
60
61 } No newline at end of file
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@@ -30,9 +30,8 typescript {
30 declaration = true
30 declaration = true
31 experimentalDecorators = true
31 experimentalDecorators = true
32 strict = true
32 strict = true
33 module = "commonjs"
33 module = "nodenext"
34 target = "es5"
34 target = "ESNext"
35 lib = ["es2015", "dom", "scripthost"]
36 }
35 }
37 tscCmd = "$projectDir/node_modules/.bin/tsc"
36 tscCmd = "$projectDir/node_modules/.bin/tsc"
38 tsLintCmd = "$projectDir/node_modules/.bin/tslint"
37 tsLintCmd = "$projectDir/node_modules/.bin/tslint"
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@@ -1,15 +1,8
1 import { ActivationError } from "./ActivationError";
1 import { ActivationError, ActivationItem } from "./ActivationError";
2 import { Descriptor, ILifetime, IActivationContext, DescriptorMap, ILifetimeManager, ILifetimeSlot } from "./interfaces";
2 import { IActivationContext, DescriptorMap, ILifetimeManager, ILifetimeSlot, ServiceLocator, IContainerBuilder } from "../typings/interfaces";
3 import { argumentNotNull, prototype } from "./traits";
3 import { argumentNotNull, each, prototype } from "./traits";
4
4 import { LifetimeManager } from "./LifetimeManager";
5 export interface ActivationContextInfo {
5 import { ContainerBuilder } from "./ContainerBuilder";
6 name: string;
7
8 service: string;
9
10 }
11
12 let nextId = 1;
13
6
14 /** This object is created once per `Container.resolve` method call and used to
7 /** This object is created once per `Container.resolve` method call and used to
15 * cache dependencies and to track created instances. The activation context
8 * cache dependencies and to track created instances. The activation context
@@ -21,17 +14,14 let nextId = 1;
21 * this activation context.
14 * this activation context.
22 */
15 */
23 export class ActivationContext<S> implements IActivationContext<S> {
16 export class ActivationContext<S> implements IActivationContext<S> {
24 private readonly _cache: Record<string, unknown>;
25
17
26 private readonly _services: DescriptorMap<S>;
18 private readonly _container: ServiceLocator<S>;
27
28 private readonly _name: string;
29
19
30 private readonly _service: Descriptor<S, unknown>;
20 private readonly _contextScope: ILifetimeManager;
31
21
32 private readonly _lifetimeManagers: ILifetimeManager[];
22 private _services: DescriptorMap<S>;
33
23
34 private readonly _parent: ActivationContext<S> | undefined;
24 private readonly _scope: ILifetimeManager[];
35
25
36 /** Creates a new activation context with the specified parameters.
26 /** Creates a new activation context with the specified parameters.
37 * @param containerLifetimeManager the container which starts the activation process
27 * @param containerLifetimeManager the container which starts the activation process
@@ -41,31 +31,31 export class ActivationContext<S> implem
41 * @param service the service to activate, this parameter is used for the
31 * @param service the service to activate, this parameter is used for the
42 * debug purpose.
32 * debug purpose.
43 */
33 */
44 constructor(lifetimeManagers: ILifetimeManager[], services: DescriptorMap<S>, name: string, service: Descriptor<S, unknown>, cache = {}) {
34 constructor(container: ServiceLocator<S>, scope: ILifetimeManager[], services: DescriptorMap<S>, contextScope: ILifetimeManager = new LifetimeManager()) {
45 this._name = name;
35 this._container = container;
46 this._service = service;
36 this._contextScope = contextScope;
47 this._cache = cache;
48 this._services = services;
37 this._services = services;
49 this._lifetimeManagers = lifetimeManagers;
38 this._scope = scope;
50 }
51
52 /** the name of the current resolving dependency */
53 getName() {
54 return this._name;
55 }
39 }
56
40
57 resolve<K extends keyof S>(name: K): NonNullable<S[K]>;
41 resolve<K extends keyof S>(name: K, stack: ActivationItem[]): NonNullable<S[K]>;
58 resolve<K extends keyof S, T>(name: K, def: T): NonNullable<S[K]> | T;
42 resolve<K extends keyof S, T>(name: K, stack: ActivationItem[], def: T): NonNullable<S[K]> | T;
59 resolve<K extends keyof S, T>(name: K, def?: T): NonNullable<S[K]> | T | undefined {
43 resolve<K extends keyof S, T>(name: K, stack: ActivationItem[], def?: T): NonNullable<S[K]> | T | undefined {
60 const d = this._services[name];
44 const service = this._services[name];
61
45
62 if (d !== undefined) {
46 if (service !== undefined) {
63 return this.activate(d, name.toString());
47 return service.activate(
48 this,
49 stack.concat({
50 name: name.toString(),
51 descriptor: service.toString()
52 })
53 );
64 } else {
54 } else {
65 if (arguments.length > 1)
55 if (arguments.length > 2)
66 return def;
56 return def;
67 else
57 else
68 throw new Error(`Service ${String(name)} not found`);
58 throw new Error("Service not found");
69 }
59 }
70 }
60 }
71
61
@@ -75,7 +65,7 export class ActivationContext<S> implem
75 * @name{string} the name of the service
65 * @name{string} the name of the service
76 * @service{string} the service descriptor to register
66 * @service{string} the service descriptor to register
77 */
67 */
78 register<K extends keyof S>(name: K, service: DescriptorMap<S>[K]) {
68 private _register<K extends keyof S>(name: K, service: DescriptorMap<S>[K]) {
79 argumentNotNull(name, "name");
69 argumentNotNull(name, "name");
80
70
81 const d = this._services[name];
71 const d = this._services[name];
@@ -85,69 +75,37 export class ActivationContext<S> implem
85 this._services[name] = service;
75 this._services[name] = service;
86 }
76 }
87
77
88 ownerSlot<T>(slotId: string | number): ILifetimeSlot<T> {
78 scopeSlot<T>(level: number, slotId: string | number): ILifetimeSlot<T> {
89 return this._lifetimeManagers[this._service.level].slot(slotId);
79 if (level < 0 || level >= this._scope.length)
80 throw new Error("The scope level is out of range");
81 return this._scope[level].slot(slotId);
90 }
82 }
91
83
92 containerSlot<T>(slotId: string | number): ILifetimeSlot<T> {
84 hierarchySlot<T>(slotId: string | number): ILifetimeSlot<T> {
93 return this._lifetimeManagers[this._lifetimeManagers.length - 1].slot(slotId);
85 return this._scope[this._scope.length - 1].slot(slotId);
86 }
87
88 selfContainer(): ServiceLocator<S> {
89 return this._container;
90 }
91
92 createChildContainer(): IContainerBuilder<S, keyof S> {
93 return new ContainerBuilder(this._services, this._scope);
94 }
94 }
95
95
96 contextSlot<T>(slotId: string | number): ILifetimeSlot<T> {
96 contextSlot<T>(slotId: string | number): ILifetimeSlot<T> {
97
97 return this._contextScope.slot(slotId);
98 }
99
100 createLifetime<T>(): ILifetime<T> {
101 const id = nextId++;
102 return {
103 initialize() { },
104 has: () => id in this._cache,
105 get: () => {
106 const v = this._cache[id] as T;
107 if (v === undefined || v === null)
108 throw new Error("The value isn't present in the activation context");
109 return v;
110 },
111 store: item => {
112 this._cache[id] = item;
113 }
114 };
115 }
98 }
116
99
117 activate<T>(d: Descriptor<S, T>, name: string) {
100 withOverrides<X>(overrides: DescriptorMap<S>, action: () => X) {
118 // TODO: add logging
101 const services = this._services;
119 // if (trace.isLogEnabled())
102 this._services = prototype(this._services);
120 // trace.log("enter {0} {1}", name, d);
103 try {
121
104 each(overrides, (v, k) => this._register(k, v));
122 const ctx = new ActivationContext(
105 return action();
123 this._containerLifetimeManager,
106 } finally {
124 d.hasOverrides ? prototype(this._services) : this._services,
107 this._services = services;
125 name,
126 d,
127 this._cache
128 );
129
130 const v = d.activate(ctx);
131
132 // if (trace.isLogEnabled())
133 // trace.log(`leave ${name}`);
134
135 return v;
136 }
108 }
137
138 getStack(): ActivationContextInfo[] {
139 const stack = [{
140 name: this._name,
141 service: this._service.toString()
142 }];
143
144 return this._parent ?
145 stack.concat(this._parent.getStack()) :
146 stack;
147 }
148
149 fail(innerException: unknown): never {
150 throw new ActivationError(this._name, this.getStack(), innerException);
151 }
109 }
152
110
153 }
111 }
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@@ -1,6 +1,6
1 export interface ActivationItem {
1 export interface ActivationItem {
2 name: string;
2 name: string;
3 service: string;
3 descriptor: string;
4 }
4 }
5
5
6 /**
6 /**
@@ -17,11 +17,6 export class ActivationError {
17 readonly activationStack: ActivationItem[];
17 readonly activationStack: ActivationItem[];
18
18
19 /**
19 /**
20 * The name of the failed service
21 */
22 readonly service: string;
23
24 /**
25 * The exception which occurred during activation of the service
20 * The exception which occurred during activation of the service
26 */
21 */
27 readonly innerException: unknown;
22 readonly innerException: unknown;
@@ -31,30 +26,32 export class ActivationError {
31 */
26 */
32 readonly message: string;
27 readonly message: string;
33
28
34 constructor(service: string, activationStack: ActivationItem[], innerException: unknown) {
29 constructor(message: string, activationStack: ActivationItem[], innerException?: unknown) {
35 this.message = "Failed to activate the service";
30 this.message = message;
36 this.activationStack = activationStack;
31 this.activationStack = activationStack;
37 this.service = service;
38 this.innerException = innerException;
32 this.innerException = innerException;
39 }
33 }
40
34
41 toString() {
35 toString() {
42 const parts = [this.message];
36 const parts = [this.message];
43 if (this.service)
37
44 parts.push(`when activating: ${String(this.service)}`);
38 if (this.activationStack && this.activationStack.length) {
39 const [{ name, descriptor }, ...before] = this.activationStack;
40
41 parts.push(`when activating: ${name}, ${descriptor}`);
42
43 if (before) {
44 parts.push("at");
45 parts.push.apply(
46 null,
47 before.map(({ name: name, descriptor: service }) => ` ${name} ${service}`)
48 );
49 }
50 }
45
51
46 if (this.innerException)
52 if (this.innerException)
47 parts.push(`caused by: ${String(this.innerException)}`);
53 parts.push(`caused by: ${String(this.innerException)}`);
48
54
49 if (this.activationStack) {
50 parts.push("at");
51 parts.push.apply(null,
52 this.activationStack
53 .map(({ name, service }) => ` ${name} ${service}`)
54 );
55
56 }
57
58 return parts.join("\n");
55 return parts.join("\n");
59 }
56 }
60 }
57 }
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@@ -1,23 +1,34
1 import { ActivationContext } from "./ActivationContext";
1 import { ActivationContext } from "./ActivationContext";
2 import { ActivationError } from "./ActivationError";
3 import { ContainerBuilder } from "./ContainerBuilder";
2 import { ContainerBuilder } from "./ContainerBuilder";
4 import { LifetimeManager } from "./LifetimeManager";
3 import { LifetimeManager, emptySlot } from "./LifetimeManager";
5 import { DescriptorMap, IContainerBuilder, IDestroyable, ILifetimeManager, ServiceLocator } from "./interfaces";
4 import { DescriptorMap, IContainerBuilder, IDestroyable, ILifetimeManager, ILifetimeSlot, ServiceLocator } from "../typings/interfaces";
5
6 let nextId = 1;
6
7
7 export class Container<S> implements ServiceLocator<S>, IDestroyable {
8 export class Container<S> implements ServiceLocator<S>, IDestroyable {
8 private readonly _services: DescriptorMap<S>;
9 private readonly _services: DescriptorMap<S>;
9
10
10 private readonly _lifetimeManagers: ILifetimeManager[];
11 private readonly _scope: ILifetimeManager[];
12
13 private readonly _containerId = `container-${nextId++}`;
14
15 private readonly _slot: ILifetimeSlot<this>;
11
16
12 private _disposed: boolean;
17 private _disposed: boolean;
13
18
14 private readonly _onDestroyed: () => void;
19 constructor(services: DescriptorMap<S>, parentScope: ILifetimeManager[]) {
15
16 constructor(services: DescriptorMap<S>, lifetimeManagers: ILifetimeManager[], destroyed: () => void) {
17 this._services = services;
20 this._services = services;
18 this._disposed = false;
21 this._disposed = false;
19 this._lifetimeManagers = lifetimeManagers.concat(new LifetimeManager());
22 this._scope = parentScope.concat(new LifetimeManager());
20 this._onDestroyed = destroyed;
23
24 // If this container is created inside the parent container scope,
25 // allocated lifetime slot
26 this._slot = parentScope.length ?
27 parentScope[parentScope.length - 1].slot(this._containerId) :
28 emptySlot<this>();
29
30 // store the container reference in the lifetime slot
31 this._slot.store(this);
21
32
22 }
33 }
23
34
@@ -29,9 +40,7 export class Container<S> implements Ser
29 createChildBuilder(): IContainerBuilder<S, keyof S> {
40 createChildBuilder(): IContainerBuilder<S, keyof S> {
30 this._assertNotDestroyed();
41 this._assertNotDestroyed();
31
42
32 const lifetime = this._lifetimeManager.create<IDestroyable>();
43 return new ContainerBuilder(this._services, this._scope);
33
34 return new ContainerBuilder(this._services, lifetime);
35 }
44 }
36
45
37 resolve<K extends keyof S>(name: K): NonNullable<S[K]>;
46 resolve<K extends keyof S>(name: K): NonNullable<S[K]>;
@@ -39,26 +48,24 export class Container<S> implements Ser
39 resolve<K extends keyof S, T>(name: K, def?: T) {
48 resolve<K extends keyof S, T>(name: K, def?: T) {
40 this._assertNotDestroyed();
49 this._assertNotDestroyed();
41
50
42 const d = this._services[name];
51 const context = new ActivationContext(this, this._scope, this._services);
43 if (d === undefined) {
52
44 if (arguments.length > 1)
53 return arguments.length === 1 ?
45 return def;
54 context.resolve(name, []) :
46 else
55 context.resolve(name, [], def);
47 throw new Error(`Service '${String(name)}' isn't found`);
48 } else {
49 const context = new ActivationContext(this._lifetimeManagers, this._services, String(name), d);
50 try {
51 return d.activate(context);
52 } catch (error) {
53 throw new ActivationError(name.toString(), context.getStack(), error);
54 }
56 }
55 }
57
56 }
57 destroy() {
58 destroy() {
58 if (this._disposed)
59 if (this._disposed)
59 return;
60 return;
60 this._disposed = true;
61 this._disposed = true;
61 this._lifetimeManager.destroy();
62
62 (0,this._onDestroyed)();
63 // destroy own scope
64 this._scope[this._scope.length - 1].destroy();
65
66 // release lifetime slot if the container is destroyed before the parent
67 // container. If this container is destroyed during the parent container
68 // cleanup procedure this call will have no effect.
69 this._slot.remove();
63 }
70 }
64 }
71 }
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@@ -1,9 +1,6
1 import { Container } from "./Container";
1 import { Container } from "./Container";
2 import { DescriptorBuilder } from "./DescriptorBuilder";
2 import { DescriptorBuilder } from "./DescriptorBuilder";
3 import { containerSelfDescriptor } from "./DescriptorImpl";
3 import { Descriptor, IContainerBuilder, IDescriptorBuilder, DescriptorMap, ServiceLocator, ILifetimeManager } from "../typings/interfaces";
4 import { Descriptor, IContainerBuilder, IDescriptorBuilder, DescriptorMap, ServiceLocator, ILifetime, IDestroyable, ContainerServices, ContainerServicesConstraint } from "./interfaces";
5 import { emptyLifetime, LifetimeManager } from "./LifetimeManager";
6 import { isDestroyable, prototype } from "./traits";
7
4
8 /**
5 /**
9 * Container builder used to prepare service descriptors and create a IoC container
6 * Container builder used to prepare service descriptors and create a IoC container
@@ -13,20 +10,20 export class ContainerBuilder<S, U exten
13
10
14 private _pending = 1;
11 private _pending = 1;
15
12
16 private readonly _services: DescriptorMap<ContainerServices<S>>;
13 private readonly _services: DescriptorMap<S>;
17
14
18 private readonly _lifetimeManager = new LifetimeManager();
15 private readonly _scope: ILifetimeManager[];
19
16
20 private readonly _lifetime: ILifetime<IDestroyable>;
17 private readonly _level: number;
21
18
22 constructor(parentServices: DescriptorMap<S> | null = null, lifetime?: ILifetime<IDestroyable>) {
19 constructor(parentServices: DescriptorMap<S> | null, scope: ILifetimeManager[] = []) {
23 this._services = { ...parentServices }; // create a copy
20 this._services = { ...parentServices }; // create a copy
24 this._lifetime = lifetime ?? emptyLifetime();
21 this._level = scope.length;
22 this._scope = scope;
25 }
23 }
26 createServiceBuilder<K extends U>(name: K):
24 createServiceBuilder<K extends U>(name: K): IDescriptorBuilder<S, S[K], Record<never, never>, U> {
27 IDescriptorBuilder<S, S[K], Record<never, never>, U> {
28
25
29 return new DescriptorBuilder(this._lifetimeManager, this._register(name), this._fail);
26 return new DescriptorBuilder(this._level, String(name), this._register(name), this._fail);
30
27
31 }
28 }
32
29
@@ -35,13 +32,7 export class ContainerBuilder<S, U exten
35 if (!this._complete())
32 if (!this._complete())
36 throw new Error("The configuration didn't complete.");
33 throw new Error("The configuration didn't complete.");
37
34
38 const {remove, store} = this._lifetime(null);
35 return new Container(this._services, this._scope);
39
40 const container = new Container(this._services, this._lifetimeManager, remove);
41
42 store(container);
43
44 return container;
45 }
36 }
46
37
47 private readonly _register = <K extends U>(name: K) =>
38 private readonly _register = <K extends U>(name: K) =>
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@@ -1,7 +1,7
1 import { BuildDescriptorFn, IDescriptorBuilder, DepsMap, Resolve, DescriptorMap } from "./interfaces";
1 import { BuildDescriptorFn, IDescriptorBuilder, DepsMap, Resolve, DescriptorMap } from "../typings/interfaces";
2 import { Descriptor, ILifetime, ActivationType } from "./interfaces";
2 import { Descriptor, ILifetime, ActivationType } from "../typings/interfaces";
3 import { DescriptorImpl } from "./DescriptorImpl";
3 import { DescriptorImpl } from "./DescriptorImpl";
4 import { containerLifetime, contextLifetime, emptyLifetime, hierarchyLifetime, LifetimeManager, singletonLifetime } from "./LifetimeManager";
4 import { contextLifetime, emptyLifetime, hierarchyLifetime, scopeLifetime, singletonLifetime } from "./LifetimeManager";
5 import { each, isPromise, isString, key, oid } from "./traits";
5 import { each, isPromise, isString, key, oid } from "./traits";
6
6
7 /**
7 /**
@@ -15,6 +15,10 export class DescriptorBuilder<S, T, R,
15
15
16 private readonly _refs: DepsMap<R>;
16 private readonly _refs: DepsMap<R>;
17
17
18 private readonly _level: number;
19
20 private readonly _instanceId: string | number;
21
18 private _lifetime: ILifetime<T> = emptyLifetime<T>();
22 private _lifetime: ILifetime<T> = emptyLifetime<T>();
19
23
20 private _overrides: DescriptorMap<S>;
24 private _overrides: DescriptorMap<S>;
@@ -36,11 +40,13 export class DescriptorBuilder<S, T, R,
36 * @param cb The callback to receive the built service descriptor
40 * @param cb The callback to receive the built service descriptor
37 * @param eb The callback to receive the error due
41 * @param eb The callback to receive the error due
38 */
42 */
39 constructor(cb: (d: Descriptor<S, T>) => void, eb: (err: unknown) => void) {
43 constructor(level: number, instanceId: string | number, cb: (d: Descriptor<S, T>) => void, eb: (err: unknown) => void) {
40 this._cb = cb;
44 this._cb = cb;
41 this._eb = eb;
45 this._eb = eb;
42 this._overrides = {};
46 this._overrides = {};
43 this._refs = {};
47 this._refs = {};
48 this._level = level;
49 this._instanceId = instanceId;
44 }
50 }
45
51
46 /** Declares dependencies to be consumed in the factory method */
52 /** Declares dependencies to be consumed in the factory method */
@@ -85,6 +91,8 export class DescriptorBuilder<S, T, R,
85 if (builder) {
91 if (builder) {
86 this._defer();
92 this._defer();
87 const d = new DescriptorBuilder<S, NonNullable<S[K]>, object, U>(
93 const d = new DescriptorBuilder<S, NonNullable<S[K]>, object, U>(
94 this._level,
95 String(nameOrServices),
88 result => {
96 result => {
89 this._overrides[nameOrServices] = result;
97 this._overrides[nameOrServices] = result;
90 this._complete();
98 this._complete();
@@ -145,11 +153,11 export class DescriptorBuilder<S, T, R,
145 _resolveLifetime<T>(activation: ActivationType, typeId?: string | object): ILifetime<T> {
153 _resolveLifetime<T>(activation: ActivationType, typeId?: string | object): ILifetime<T> {
146 switch (activation) {
154 switch (activation) {
147 case "container":
155 case "container":
148 return containerLifetime();
156 return scopeLifetime(this._level, this._instanceId);
149 case "hierarchy":
157 case "hierarchy":
150 return hierarchyLifetime();
158 return hierarchyLifetime(this._instanceId);
151 case "context":
159 case "context":
152 return contextLifetime();
160 return contextLifetime(this._instanceId);
153 case "singleton": {
161 case "singleton": {
154 if (!typeId)
162 if (!typeId)
155 throw Error("The singleton activation requires a typeId");
163 throw Error("The singleton activation requires a typeId");
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@@ -1,9 +1,10
1 import { Descriptor, ILifetime, DepsMap, IActivationContext, DescriptorMap } from "./interfaces";
1 import { Descriptor, ILifetime, IActivationContext, DescriptorMap, DescriptorDepsMap } from "../typings/interfaces";
2 import { ActivationError, ActivationItem } from "./ActivationError";
2 import { each, key } from "./traits";
3 import { each, key } from "./traits";
3
4
4 export interface DescriptorImplArgs<S, T> {
5 export interface DescriptorImplArgs<S, T> {
5
6
6 readonly lifetime: ILifetime<NonNullable<T>>;
7 readonly lifetime: ILifetime<T>;
7
8
8 readonly factory: (refs: Record<key, unknown>) => NonNullable<T>;
9 readonly factory: (refs: Record<key, unknown>) => NonNullable<T>;
9
10
@@ -11,90 +12,73 export interface DescriptorImplArgs<S, T
11
12
12 readonly overrides?: DescriptorMap<S>;
13 readonly overrides?: DescriptorMap<S>;
13
14
14 readonly dependencies?: DepsMap<S>;
15 readonly dependencies?: DescriptorDepsMap<S>;
15 }
16 }
16
17
17 export const containerSelfDescriptor = <S>() => Object.freeze({
18 level: 0,
19 activate(context: IActivationContext<S>) {
20 return context.createChildContainer();
21 }
22 });
23
24
25 export class DescriptorImpl<S, T> implements Descriptor<S, T> {
18 export class DescriptorImpl<S, T> implements Descriptor<S, T> {
26
19
27 private readonly _overrides?: DescriptorMap<S>;
20 private readonly _overrides: DescriptorMap<S> | undefined;
28
21
29 private readonly _lifetime: ILifetime<NonNullable<T>>;
22 private readonly _lifetime: ILifetime<T>;
30
23
31 private readonly _factory: (refs: Record<key, unknown>) => NonNullable<T>;
24 private readonly _factory: (refs: Record<key, unknown>) => NonNullable<T>;
32
25
33 private readonly _cleanup?: (item: NonNullable<T>) => void;
26 private readonly _cleanup: (item: NonNullable<T>) => void;
34
27
35 private readonly _deps?: DepsMap<S>;
28 private readonly _dependencies: DescriptorDepsMap<S> | undefined;
36
37 readonly hasOverrides: boolean;
38
29
39 constructor({ lifetime, factory, cleanup, overrides, dependencies }: DescriptorImplArgs<S, T>) {
30 constructor({ lifetime, factory, cleanup, overrides, dependencies }: DescriptorImplArgs<S, T>) {
40 this._lifetime = lifetime;
31 this._lifetime = lifetime;
41 this._factory = factory;
32 this._factory = factory;
42 if (cleanup)
33 this._cleanup = cleanup ? cleanup : () => { };
43 this._cleanup = cleanup;
44 if (overrides)
45 this._overrides = overrides;
34 this._overrides = overrides;
46 if (dependencies)
35 this._dependencies = dependencies;
47 this._deps = dependencies;
48
49 this.hasOverrides = !!overrides;
50 }
36 }
51
37
52 activate(context: IActivationContext<S>): NonNullable<T> {
38 activate(context: IActivationContext<S>, stack: ActivationItem[]): NonNullable<T> {
53
39
54 const { has, get, initialize, store } = this._lifetime(context);
40 const slot = this._lifetime(context);
41 if (slot.has())
42 return slot.get();
55
43
56 if (has())
44 if (!slot.initialize())
57 return get();
45 throw new Error("Cyclic reference detected");
58
46
59 initialize();
47 const instance = this._overrides ?
48 context.withOverrides(this._overrides, () => this._activate(context, stack)) :
49 this._activate(context, stack);
50
51 slot.store(instance, this._cleanup);
60
52
61 if (this._overrides)
53 return instance;
62 each(this._overrides, (v, k) => context.register(k, v));
54 }
63
55
64 const resolve = <K extends keyof S>({ name, lazy, ...opts }: { name: K; lazy?: boolean; default?: S[K] | null; }) => {
56 private _activate(context: IActivationContext<S>, stack: ActivationItem[]) {
57 const refs: Record<key, unknown> = {};
58 if (this._dependencies) {
59 const resolve = <K extends keyof S>({ name, lazy, ...opts }: { name: K; lazy?: boolean; default?: S[K]; }) => {
65 if (lazy) {
60 if (lazy) {
66 return "default" in opts ?
61 return "default" in opts ?
67 () => context.resolve(name, opts.default) :
62 () => context.resolve(name, stack, opts.default) :
68 () => context.resolve(name);
63 () => context.resolve(name, stack);
69 } else {
64 } else {
70 return "default" in opts ?
65 return "default" in opts ?
71 context.resolve(name, opts.default) :
66 context.resolve(name, stack, opts.default) :
72 context.resolve(name);
67 context.resolve(name, stack);
73 }
68 }
74 };
69 };
75
70
76 const deps = this._deps;
71 // can throw activation exception
77
72 each(this._dependencies, (v, k) => {
78 const refs = deps ?
73 refs[k] = resolve(v);
79 Object.keys(deps)
74 });
80 .map(k => {
75 }
81 const ref = deps[k];
82 return typeof ref !== "object" ?
83 { [k]: resolve({ name: ref }) } :
84 { [k]: resolve(ref) };
85 })
86 .reduce((a, p) => ({ ...a, ...p }), {}) :
87 {};
88
76
89 try {
77 try {
90 // call the factory method
78 // call the factory method
91 const instance = (0, this._factory)(refs);
79 return (0, this._factory)(refs);
92
80 } catch (e) {
93 // store the instance
81 throw new ActivationError("Error creating instance", stack, e);
94 store(instance, this._cleanup);
95 return instance;
96 } catch (err) {
97 context.fail(err);
98 }
82 }
99 }
83 }
100
84
Show file before | Show file after | Hide comments
@@ -1,4 +1,4
1 import { ConfigurationMap, ConfigurationMapConstraint, ContainerServices, ContainerServicesConstraint, ExtractRequiredKeys, IContainerBuilder } from "./interfaces";
1 import { ConfigurationMap, ConfigurationMapConstraint, ContainerServices, ContainerServicesConstraint, ExtractRequiredKeys, IContainerBuilder } from "../typings/interfaces";
2 import { argumentNotNull, each, isKey } from "./traits";
2 import { argumentNotNull, each, isKey } from "./traits";
3
3
4 type ContainerExtensionConstraint<X, S> = ContainerServicesConstraint<Pick<S, keyof X & keyof S>>;
4 type ContainerExtensionConstraint<X, S> = ContainerServicesConstraint<Pick<S, keyof X & keyof S>>;
Show file before | Show file after | Hide comments
@@ -1,13 +1,6
1 import { IDestroyable, ILifetimeContext, ILifetimeManager, ILifetimeSlot } from "./interfaces";
1 import { ILifetime, ILifetimeContext, ILifetimeManager, ILifetimeSlot } from "../typings/interfaces";
2 import { argumentNotNull, isDestroyable } from "./traits";
2 import { LifetimeSlot } from "./LifetimeSlot";
3
3 import { argumentNotNull } from "./traits";
4 const safeCall = (item: () => void) => {
5 try {
6 item();
7 } catch {
8 // silence!
9 }
10 };
11
4
12 const noop = () => { };
5 const noop = () => { };
13
6
@@ -18,7 +11,7 const fail = (message: string) => (): ne
18 const _emptySlot = Object.freeze({
11 const _emptySlot = Object.freeze({
19 has: () => false,
12 has: () => false,
20
13
21 initialize: noop,
14 initialize: () => false,
22
15
23 get: fail("The specified item isn't registered with a lifetime manager"),
16 get: fail("The specified item isn't registered with a lifetime manager"),
24
17
@@ -29,105 +22,48 const _emptySlot = Object.freeze({
29 cleanup: noop,
22 cleanup: noop,
30 });
23 });
31
24
32 const _destroy = (item: unknown) => () => isDestroyable(item) && item.destroy() ;
33
34 const _makeCleanup = <T>(value: T, cleanup?: (item: T) => void) =>
35 cleanup ? () => cleanup(value) : _destroy(value);
36
37 const newSlot = <T>(put: (item: ILifetimeSlot<T>) => void, remove: () => void): ILifetimeSlot<T> => ({
38 has: () => false,
39
40 initialize: () => put(pendingSlot(put, remove)),
41
42 get: fail("The slot doesn't hold a value"),
43
44 store: (value, cleanup) => put(valueSlot(value, cleanup, remove)),
45
46 remove: noop,
47
48 cleanup: noop,
49 });
50
51 const pendingSlot = <T>(put: (item: ILifetimeSlot<T>) => void, remove: () => void): ILifetimeSlot<T> => ({
52 has: () => false,
53
54 get: fail("The value in this slot doesn't exist"),
55
56 initialize: fail("Cyclic reference detected"),
57
58 store: (value, cleanup) => put(valueSlot(value, cleanup, remove)),
59
60 remove,
61
62 cleanup: noop
63 });
64
65 const valueSlot = <T>(value: T, cleanup: ((item: T) => void) | undefined, remove: () => void) => ({
66 has: () => true,
67
68 get: () => value,
69
70 initialize: fail("The slot already has a value"),
71
72 store: fail("The slot already has a value"),
73
74 cleanup: _makeCleanup(value, cleanup),
75
76 remove: remove
77 });
78
79 export class LifetimeManager implements ILifetimeManager {
25 export class LifetimeManager implements ILifetimeManager {
80 private _destroyed = false;
26 private _destroyed = false;
81
27
82 private readonly _slots: Record<string, ILifetimeSlot<unknown>> = {};
28 private readonly _slots: Record<string, ILifetimeSlot<unknown>> = {};
83
29
84 slot<T>(cookie: string | number): ILifetimeSlot<T> {
30 slot<T>(slotId: string | number): ILifetimeSlot<T> {
85 if (cookie in this._slots)
86 return this._slots[cookie] as ILifetimeSlot<T>;
87
88 return newSlot<T>(this._put(cookie), this._remove(cookie));
89 }
90
91 private readonly _put = (id: string | number) => <T>(slot: ILifetimeSlot<T>) => {
92 this._assertNotDestroyed();
93 this._slots[id] = slot as ILifetimeSlot<unknown>;
94 };
95
96 private readonly _remove = (id: string | number) => () => {
97 this._assertNotDestroyed();
98 delete this._slots[id];
99 };
100
101 private _assertNotDestroyed() {
102 if (this._destroyed)
31 if (this._destroyed)
103 throw new Error("The lifetime manager is destroyed");
32 throw new Error("The lifetime manager is destroyed");
104
33
34 if (slotId in this._slots)
35 return this._slots[slotId] as ILifetimeSlot<T>;
36
37 return this._slots[slotId] = new LifetimeSlot<T>(() => delete this._slots[slotId]);
105 }
38 }
106
39
40
107 destroy() {
41 destroy() {
108 if (!this._destroyed) {
42 if (!this._destroyed) {
109 this._destroyed = true;
43 this._destroyed = true;
110 Object.values(this._slots).forEach(({ cleanup }) => safeCall(cleanup));
44 Object.values(this._slots).forEach(slot => {
45 try {
46 slot.cleanup();
47 } catch {
48 // ignore
49 }
50 });
111 }
51 }
112 }
52 }
113
53
114 }
54 }
115
55
116 export const emptyLifetime = <T>() => () => _emptySlot as ILifetimeSlot<T>;
56 export const emptySlot = <T>() => _emptySlot as ILifetimeSlot<T>;
117
57
118 let nextId = 1;
58 export const emptyLifetime = <T>() => emptySlot as ILifetime<T>;
119
59
120 export const containerLifetime = <T>() => {
60 export const scopeLifetime = <T>(level: number, slotId: string | number) =>
121 const slotId = nextId ++;
61 (context: ILifetimeContext) =>
122 return (context: ILifetimeContext) =>
62 context.scopeSlot<T>(level, slotId);
123 context.ownerSlot<T>(slotId);
124 };
125
63
126 export const hierarchyLifetime = <T>() => {
64 export const hierarchyLifetime = <T>(slotId: string | number) =>
127 const slotId = nextId++;
65 (context: ILifetimeContext) =>
128 return (context: ILifetimeContext) =>
66 context.hierarchySlot<T>(slotId);
129 context.containerSlot<T>(slotId);
130 };
131
67
132 /**
68 /**
133 * Creates a lifetime instance bound to the current activation context. This
69 * Creates a lifetime instance bound to the current activation context. This
@@ -138,12 +74,9 export const hierarchyLifetime = <T>() =
138 *
74 *
139 * @returns The instance of the lifetime.
75 * @returns The instance of the lifetime.
140 */
76 */
141 export const contextLifetime = <T>() => {
77 export const contextLifetime = <T>(slotId: string | number) =>
142 const slotId = nextId++;
78 (context: ILifetimeContext) =>
143
144 return (context: ILifetimeContext) =>
145 context.contextSlot<T>(slotId);
79 context.contextSlot<T>(slotId);
146 };
147
80
148 const singletons = new LifetimeManager();
81 const singletons = new LifetimeManager();
149
82
@@ -162,13 +95,3 export const singletonLifetime = <T>(typ
162
95
163 return () => singletons.slot<T>(typeId);
96 return () => singletons.slot<T>(typeId);
164 };
97 };
165
166 /** Creates a lifetime bound to the specified container. Using this lifetime
167 * will create a single service instance per the specified container.
168 *
169 * @param container The container which will manage the lifetime for the service
170 */
171 export const containerLifetime = <T>(manager: ILifetimeManager) => {
172 const slotId = nextId++;
173 return () => manager.slot<T>(slotId);
174 };
Show file before | Show file after | Hide comments
@@ -1,5 +1,5
1 import { FluentConfiguration } from "./FluentConfiguration";
1 import { FluentConfiguration } from "./FluentConfiguration";
2 import { ContainerServices, ContainerServicesConstraint, IDestroyable } from "./interfaces";
2 import { ContainerServicesConstraint, IDestroyable } from "../typings/interfaces";
3
3
4 export function fluent<S extends ContainerServicesConstraint<S>>() {
4 export function fluent<S extends ContainerServicesConstraint<S>>() {
5 return new FluentConfiguration<S>();
5 return new FluentConfiguration<S>();
Show file before | Show file after | Hide comments
@@ -1,5 +1,5
1 import { ContainerBuilder } from "./ContainerBuilder";
1 import { ActivationItem } from "../ts/ActivationError";
2 import { key } from "./traits";
2 import { key } from "../ts/traits";
3
3
4 export interface IDestroyable {
4 export interface IDestroyable {
5 destroy(): void;
5 destroy(): void;
@@ -32,6 +32,10 export type DepsMap<S> = {
32 [k in key]: Refs<S> | keyof S;
32 [k in key]: Refs<S> | keyof S;
33 };
33 };
34
34
35 export type DescriptorDepsMap<S> = {
36 [k in key]: Refs<S>;
37 };
38
35 export type Refs<S> = {
39 export type Refs<S> = {
36 [k in keyof S]: Ref<k, S[k]>;
40 [k in keyof S]: Ref<k, S[k]>;
37 }[keyof S];
41 }[keyof S];
@@ -47,7 +51,7 export type Ref<K extends key, D> = {
47 * When specified the dependency becomes optional, the default value can be
51 * When specified the dependency becomes optional, the default value can be
48 * `null` or `undefined`
52 * `null` or `undefined`
49 */
53 */
50 default?: D | null
54 default?: D;
51 };
55 };
52
56
53 export type Lazy<T, L extends boolean> = L extends true ? () => T : T;
57 export type Lazy<T, L extends boolean> = L extends true ? () => T : T;
@@ -55,14 +59,14 export type Lazy<T, L extends boolean> =
55 /** Возвращает тип свойства `default` в типе {@link T} */
59 /** Возвращает тип свойства `default` в типе {@link T} */
56 export type InferDefault<T> = T extends { default: infer D } ? D : never;
60 export type InferDefault<T> = T extends { default: infer D } ? D : never;
57
61
58 export type InferLazy<R> = R extends { lazy: infer L } ?
62 export type IsLazy<R> = R extends { lazy: infer L } ?
59 L extends true ? true : false :
63 L extends true ? true : false :
60 false;
64 false;
61 export type Resolve<S, R> =
65 export type Resolve<S, R> =
62 R extends keyof S ? NonNullable<S[R]> :
66 R extends keyof S ? NonNullable<S[R]> :
63 R extends Ref<infer K, unknown> ?
67 R extends Ref<infer K, unknown> ?
64 K extends keyof S ?
68 K extends keyof S ?
65 Lazy<NonNullable<S[K]> | InferDefault<R>, InferLazy<R>> :
69 Lazy<NonNullable<S[K]> | InferDefault<R>, IsLazy<R>> :
66 never :
70 never :
67 never;
71 never;
68
72
@@ -161,34 +165,38 export interface Descriptor<S, T> {
161 /** This flags indicates that this registration can be replaced or overridden. */
165 /** This flags indicates that this registration can be replaced or overridden. */
162 readonly configurable?: boolean;
166 readonly configurable?: boolean;
163
167
164 /** If specified signals the activation context that a new service scope
168 activate(context: IActivationContext<S>, stack: ActivationItem[]): NonNullable<T>;
165 * should be created to isolate service overrides.
166 */
167 readonly hasOverrides?: boolean;
168
169 activate(context: IActivationContext<S>): NonNullable<T>;
170 }
169 }
171
170
172 /** The context used to initialize lifetime instance {@linkcode ILifetime} */
171 /** The context used to initialize lifetime instance {@linkcode ILifetime} */
173 export interface ILifetimeContext {
172 export interface ILifetimeContext {
174
173
175 ownerSlot<T>(slotId: string | number): ILifetimeSlot<T>;
176
177 contextSlot<T>(slotId: string | number): ILifetimeSlot<T>;
174 contextSlot<T>(slotId: string | number): ILifetimeSlot<T>;
178
175
179 containerSlot<T>(slotId: string | number): ILifetimeSlot<T>;
176 /**
177 *
178 * @param slotId
179 */
180 scopeSlot<T>(level: number, slotId: string | number): ILifetimeSlot<T>;
180
181
182 hierarchySlot<T>(slotId: string | number): ILifetimeSlot<T>;
181 }
183 }
182
184
183 export interface IActivationContext<S> extends ILifetimeContext, ServiceLocator<S> {
185 export interface IActivationContext<S> extends ILifetimeContext {
184
186
185 register<K extends keyof S>(name: K, service: DescriptorMap<S>[K]): void;
187 /**
186
188 * @param overrides
187 fail(error: unknown): never;
189 * @param action
190 * @throws
191 */
192 withOverrides<X>(overrides: DescriptorMap<S>, action: () => X): X;
188
193
189 selfContainer(): ServiceLocator<S>;
194 selfContainer(): ServiceLocator<S>;
190
195
191 createChildContainer(): IContainerBuilder<S, Exclude<keyof S, ContainerKeys>>;
196 createChildContainer(): IContainerBuilder<S, keyof S>;
197
198 resolve<K extends keyof S>(name: K, stack: ActivationItem[]): NonNullable<S[K]>;
199 resolve<K extends keyof S, T>(name: K, stack: ActivationItem[], def: T): NonNullable<S[K]> | T;
192 }
200 }
193
201
194 /**
202 /**
@@ -202,7 +210,7 export type DescriptorMap<S> = {
202 [k in keyof S]?: Descriptor<S, S[k]>;
210 [k in keyof S]?: Descriptor<S, S[k]>;
203 };
211 };
204
212
205 type ContainerKeys = keyof ContainerProvided<object>;
213 export type ContainerKeys = keyof ContainerProvided<object>;
206
214
207 export type ContainerProvided<S, U extends keyof S = keyof S> = {
215 export type ContainerProvided<S, U extends keyof S = keyof S> = {
208 container: ServiceLocator<ContainerProvided<S>>;
216 container: ServiceLocator<ContainerProvided<S>>;
@@ -251,17 +259,28 export type ActivationType = "singleton"
251 export type ILifetime<T> = (context: ILifetimeContext) => ILifetimeSlot<T>;
259 export type ILifetime<T> = (context: ILifetimeContext) => ILifetimeSlot<T>;
252
260
253 export interface ILifetimeSlot<T> {
261 export interface ILifetimeSlot<T> {
254 readonly has: () => boolean;
262 has(): boolean;
263
264 get(): NonNullable<T>;
255
265
256 readonly get: () => T;
266 /**
257
267 * Initializes the slot, if the slot is already initialized returns false,
258 readonly initialize: () => void;
268 * otherwise returns true. This method is used to detect cyclic references.
269 */
270 initialize(): boolean;
259
271
260 readonly store: (item: T, cleanup?: (item: T) => void) => void;
272 store(item: NonNullable<T>, cleanup?: (item: NonNullable<T>) => void): void;
261
273
262 readonly remove: () => void;
274 /**
275 * Removes the slot from the lifetime manager. The inner value will not be
276 * disposed. If the slot is cleaned up calling this method has no effect.
277 */
278 remove(): void;
263
279
264 readonly cleanup: () => void;
280 /**
281 * Disposed inner value of this slot.
282 */
283 cleanup(): void;
265 }
284 }
266
285
267 export interface ILifetimeManager extends IDestroyable {
286 export interface ILifetimeManager extends IDestroyable {
Show file before | Show file after | Hide comments
@@ -6,7 +6,6
6 "listFiles": true,
6 "listFiles": true,
7 "strict": true,
7 "strict": true,
8 "types": [],
8 "types": [],
9 "target": "ES2018",
9 "target": "ESNext"
10 "lib": ["ES2018", "DOM", "ScriptHost"]
11 }
10 }
12 } No newline at end of file
11 }
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