60 lines
1.8 KiB
TypeScript
60 lines
1.8 KiB
TypeScript
import * as plugins from './smartclickhouse.plugins.js';
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import { TimeDataTable } from './smartclickhouse.classes.timedatatable.js';
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import { ClickhouseHttpClient } from './smartclickhouse.classes.httpclient.js';
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export interface IClickhouseConstructorOptions {
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url: string;
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database: string;
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username?: string;
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password?: string;
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}
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export class SmartClickHouseDb {
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public options: IClickhouseConstructorOptions;
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public clickhouseClient: ClickhouseHttpClient;
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constructor(optionsArg: IClickhouseConstructorOptions) {
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this.options = optionsArg;
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}
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/**
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* starts the connection to the Clickhouse db
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*/
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public async start(dropOld = false) {
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console.log(`Connecting to default database first.`);
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// lets connect
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this.clickhouseClient = await ClickhouseHttpClient.createAndStart(this.options);
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await this.pingDatabaseUntilAvailable();
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console.log(`Create database ${this.options.database}, if it does not exist...`);
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await this.createDatabase(dropOld);
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}
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public async createDatabase(dropOld: boolean = false) {
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if (dropOld) {
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await this.clickhouseClient.queryPromise(`DROP DATABASE IF EXISTS ${this.options.database}`);
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}
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await this.clickhouseClient.queryPromise(`CREATE DATABASE IF NOT EXISTS ${this.options.database}`);
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}
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public async pingDatabaseUntilAvailable() {
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let available = false;
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while(!available) {
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available = await this.clickhouseClient.ping().catch(err => {
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return false;
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});
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if (!available) {
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console.log(`NOT OK: tried pinging ${this.options.url}... Trying again in 5 seconds.`);
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await plugins.smartdelay.delayFor(5000);
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}
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}
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}
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/**
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* gets a table
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*/
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public async getTable(tableName: string) {
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const newTable = TimeDataTable.getTable(this, tableName);
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return newTable;
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}
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}
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