@ydbjs/core/dist/middleware.js

Core driver for YDB: manages connections, endpoint discovery, authentication, and service client creation. Foundation for all YDB client operations.

import { loggers } from '@ydbjs/debug';
import { ClientError } from 'nice-grpc';
let log = loggers.grpc;
export const debug = async function* (call, options) {
    let hasError = false;
    try {
        return yield* call.next(call.request, options);
    }
    catch (error) {
        hasError = true;
        if (error instanceof ClientError) {
            log.log('%s', error.message);
        }
        else if (error instanceof Error && error.name === 'AbortError') {
            log.log('%s %s: %s', call.method.path, 'CANCELLED', error.message);
        }
        else {
            log.log('%s %s: %s', call.method.path, 'UNKNOWN', error);
        }
        throw error;
    }
    finally {
        if (!hasError) {
            log.log('%s %s', call.method.path, 'OK');
        }
    }
};
// Process-global middleware registry. Drivers compose registered entries
// into their gRPC client middleware chain at construction time. Used by
// `@ydbjs/telemetry` to install W3C trace context propagation without
// pulling `@opentelemetry/api` into `@ydbjs/core`.
//
// Timing: `addClientMiddleware()` must run **before** `new Driver(...)` for
// the middleware to apply. Matches OTel's NodeSDK.start() pattern — start
// instrumentation, then create application objects.
let registeredMiddlewares = [];
export function addClientMiddleware(mw) {
    registeredMiddlewares.push(mw);
    return {
        [Symbol.dispose]() {
            let i = registeredMiddlewares.indexOf(mw);
            if (i >= 0)
                registeredMiddlewares.splice(i, 1);
        },
    };
}
export function getRegisteredClientMiddlewares() {
    return registeredMiddlewares;
}
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