@ydbjs/core/dist/conn.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 { createChannel, } from 'nice-grpc';
let dbg = loggers.driver.extend('conn');
export class LazyConnection {
    #endpoint;
    #channel = null;
    #channelOptions;
    #channelCredentials;
    pessimizedUntil;
    constructor(endpoint, channelCredentials, channelOptions) {
        this.#endpoint = endpoint;
        this.#channelOptions = {
            ...channelOptions,
            'grpc.ssl_target_name_override': endpoint.sslTargetNameOverride,
        };
        this.#channelCredentials = channelCredentials;
    }
    get nodeId() {
        return BigInt(this.#endpoint.nodeId);
    }
    get address() {
        return `${this.#endpoint.address}:${this.#endpoint.port}`;
    }
    get channel() {
        if (this.#channel === null) {
            dbg.log('create channel to node id=%d address=%s', this.nodeId, this.address);
            this.#channel = createChannel(this.address, this.#channelCredentials, this.#channelOptions);
        }
        return this.#channel;
    }
    close() {
        if (this.#channel) {
            dbg.log('close channel to node id=%d address=%s', this.nodeId, this.address);
            this.#channel.close();
            this.#channel = null;
        }
    }
}
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