@nestjs/core
Version:
Nest - modern, fast, powerful node.js web framework (@core)
45 lines (44 loc) • 1.78 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ContextIdFactory = exports.createContextId = void 0;
const request_constants_1 = require("../router/request/request-constants");
function createContextId() {
/**
* We are generating random identifier to track asynchronous
* execution context. An identifier does not have to be neither unique
* nor unpredictable because WeakMap uses objects as keys (reference comparison).
* Thus, even though identifier number might be equal, WeakMap would properly
* associate asynchronous context with its internal map values using object reference.
* Object is automatically removed once request has been processed (closure).
*/
return { id: Math.random() };
}
exports.createContextId = createContextId;
class ContextIdFactory {
/**
* Generates a context identifier based on the request object.
*/
static create() {
return createContextId();
}
/**
* Generates a random identifier to track asynchronous execution context.
* @param request request object
*/
static getByRequest(request, propsToInspect = ['raw']) {
var _a;
if (!request) {
return ContextIdFactory.create();
}
if (request[request_constants_1.REQUEST_CONTEXT_ID]) {
return request[request_constants_1.REQUEST_CONTEXT_ID];
}
for (const key of propsToInspect) {
if ((_a = request[key]) === null || _a === void 0 ? void 0 : _a[request_constants_1.REQUEST_CONTEXT_ID]) {
return request[key][request_constants_1.REQUEST_CONTEXT_ID];
}
}
return ContextIdFactory.create();
}
}
exports.ContextIdFactory = ContextIdFactory;