@triviality/core
Version:
Purely typed service container
256 lines • 13.1 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
Object.defineProperty(exports, "__esModule", { value: true });
var TaggedServiceFactoryReference_1 = require("../Value/TaggedServiceFactoryReference");
var ImmutableServiceReferenceList_1 = require("../Value/ImmutableServiceReferenceList");
var AsyncServiceFunctionReferenceError_1 = require("../Value/AsyncServiceFunctionReferenceError");
var BuildingState;
(function (BuildingState) {
BuildingState[BuildingState["defineServices"] = 0] = "defineServices";
BuildingState[BuildingState["buildServices"] = 1] = "buildServices";
BuildingState[BuildingState["done"] = 2] = "done";
})(BuildingState = exports.BuildingState || (exports.BuildingState = {}));
/**
* Responsible for knowing about the wiring of the different services.
*
* The application only knows about references to a service, as function callback, ServiceReference,
* for the end user this is named SF.
*
* - Protects the application of using the references for the application is fully done with
* wiring everything.
* - Stores the usage tree of the SF, as a dependency tree.
*/
var ServiceFunctionReferenceContainer = /** @class */ (function () {
function ServiceFunctionReferenceContainer() {
var _this = this;
this.getService = (function (tag) { return function () { return _this.serviceReferences.getService(tag).getProxy()(); }; });
this.state = BuildingState.defineServices;
this.serviceReferences = new ImmutableServiceReferenceList_1.ImmutableServiceReferenceList();
this.dependencyCallStack = new ImmutableServiceReferenceList_1.ImmutableServiceReferenceList();
/**
* The global reference where all service functions are bound to, so
* the 'this' keyword keeps working.
*/
this.servicesReferences = {};
this.currentBuild = function () { return _this.dependencyCallStack.last(); };
this.assertBuildServices = function () {
if (_this.state !== BuildingState.buildServices) {
throw new Error('Should be in build services');
}
};
this.assertDefineServices = function () {
if (_this.state !== BuildingState.defineServices) {
throw new Error('Should be in define services');
}
};
}
ServiceFunctionReferenceContainer.prototype.references = function () {
return this.serviceReferences;
};
ServiceFunctionReferenceContainer.prototype.getCallStack = function () {
return this.dependencyCallStack;
};
/**
* Return the actual referenced used by the application to fetch the service instance.
* The first run it preserves a dependencyCallStack, to know the dependency tree.
*/
ServiceFunctionReferenceContainer.prototype.add = function (reference, bound) {
var _this = this;
if (bound === void 0) { bound = this.servicesReferences; }
this.assertDefineServices();
this.serviceReferences = this.serviceReferences.add(reference);
reference.setContainerConfiguration({
uuid: this.createUuid(),
proxy: function () {
if (_this.state === BuildingState.done) {
return reference.getService();
}
_this.assertBuildServices();
var current = _this.currentBuild();
if (current) {
current.addDependency(reference);
}
if (reference.hasServiceInstance()) {
return reference.getService();
}
_this.dependencyCallStack = _this.dependencyCallStack.add(reference);
try {
/**
* This will cause a chain of dependencies to be called.
*/
reference.callServiceFactory(bound);
}
finally {
_this.dependencyCallStack = _this.dependencyCallStack.remove(reference);
}
return reference.getService();
},
});
if (reference instanceof TaggedServiceFactoryReference_1.TaggedServiceFactoryReference) {
this.servicesReferences[reference.tag] = reference.getProxy();
}
return reference.configuration.proxy;
};
ServiceFunctionReferenceContainer.prototype.build = function () {
return __awaiter(this, void 0, void 0, function () {
function handlePendingPromise(promise) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, promise.catch(function (e) {
if (!(e instanceof AsyncServiceFunctionReferenceError_1.AsyncServiceFunctionReferenceError)) {
return Promise.reject(e);
}
pending.push(handlePendingPromise(e.wait()));
return Promise.resolve();
})];
});
});
}
function invokeProxy(reference) {
return __awaiter(this, void 0, void 0, function () {
var instance;
return __generator(this, function (_a) {
try {
instance = reference.getProxy()();
if (reference instanceof TaggedServiceFactoryReference_1.TaggedServiceFactoryReference) {
container[reference.tag] = instance;
}
}
catch (e) {
/**
* This service can be depended on a sync service, wait for it first.
*/
if (!(e instanceof AsyncServiceFunctionReferenceError_1.AsyncServiceFunctionReferenceError)) {
return [2 /*return*/, Promise.reject(e)];
}
pending.push(handlePendingPromise(e.wait()));
}
return [2 /*return*/, Promise.resolve()];
});
});
}
function invokeProxies(references) {
return __awaiter(this, void 0, void 0, function () {
var waitForPending, _a, _b, dependency, e_1_1;
var e_1, _c;
return __generator(this, function (_d) {
switch (_d.label) {
case 0:
waitForPending = Promise.all(pending);
pending = [];
return [4 /*yield*/, waitForPending];
case 1:
_d.sent();
_d.label = 2;
case 2:
_d.trys.push([2, 7, 8, 9]);
_a = (e_1 = void 0, __values(references.toArray())), _b = _a.next();
_d.label = 3;
case 3:
if (!!_b.done) return [3 /*break*/, 6];
dependency = _b.value;
return [4 /*yield*/, invokeProxy(dependency)];
case 4:
_d.sent();
_d.label = 5;
case 5:
_b = _a.next();
return [3 /*break*/, 3];
case 6: return [3 /*break*/, 9];
case 7:
e_1_1 = _d.sent();
e_1 = { error: e_1_1 };
return [3 /*break*/, 9];
case 8:
try {
if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
}
finally { if (e_1) throw e_1.error; }
return [7 /*endfinally*/];
case 9:
if (pending.length !== 0) return [3 /*break*/, 0];
_d.label = 10;
case 10: return [2 /*return*/];
}
});
});
}
var container, pending;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
this.assertDefineServices();
this.state = BuildingState.buildServices;
container = {};
pending = [];
// Resolve all async service references first.
return [4 /*yield*/, invokeProxies(this.serviceReferences.async())];
case 1:
// Resolve all async service references first.
_a.sent();
return [4 /*yield*/, invokeProxies(this.serviceReferences.notASync())];
case 2:
_a.sent();
this.state = BuildingState.done;
return [2 /*return*/, container];
}
});
});
};
ServiceFunctionReferenceContainer.prototype.override = function (override) {
this.serviceReferences.getService(override.tag).override(override);
return this;
};
ServiceFunctionReferenceContainer.prototype.createUuid = function () {
return "" + this.references().count();
};
return ServiceFunctionReferenceContainer;
}());
exports.ServiceFunctionReferenceContainer = ServiceFunctionReferenceContainer;
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