@nestjs/typeorm/dist/data-source-name.registry.js

Nest - modern, fast, powerful node.js web framework (@typeorm)

import { Logger } from '@nestjs/common';
/**
 * Tracks active data source names at runtime in order to prevent multiple
 * data sources from being registered under the same name. Registering two
 * data sources with the same name is unsupported by TypeORM — the second
 * registration silently overrides the first — which is a common source
 * of hard-to-debug configuration issues.
 */
export class DataSourceNameRegistry {
    static logger = new Logger(DataSourceNameRegistry.name);
    static registeredNames = new Set();
    static register(dataSourceName) {
        if (this.registeredNames.has(dataSourceName)) {
            // Commented out to avoid throwing an exception as it caused regressions in test suites.
            // throw new DuplicateDataSourceException(dataSourceName);
            this.logger.warn(`A data source with the ${dataSourceName} name is already registered. ` +
                `Multiple data sources must be registered with unique names; otherwise, ` +
                `they will override each other. Please assign a unique "name" property ` +
                `to each TypeOrmModule.forRoot()/forRootAsync() registration.`);
        }
        this.registeredNames.add(dataSourceName);
    }
    static unregister(dataSourceName) {
        this.registeredNames.delete(dataSourceName);
    }
    static has(dataSourceName) {
        return this.registeredNames.has(dataSourceName);
    }
    static clear() {
        this.registeredNames.clear();
    }
}