pg-transactional-outbox/dist/strategies/message-processing-db-client-strategy.d.ts

A PostgreSQL based transactional outbox and inbox pattern implementation to support exactly once message processing (with at least once message delivery).

import { DatabaseClient } from '../common/database';
import { FullListenerConfig } from '../common/listener-config';
import { TransactionalLogger } from '../common/logger';
import { StoredTransactionalMessage } from '../message/transactional-message';
/**
 * Create a DB client instance from the pool. This can be helpful if some message
 * handlers have to use different PostgreSQL roles or if you need to set some
 * PostgreSQL configuration values for the client connection.
 */
export interface MessageProcessingDbClientStrategy {
    /**
     * Decide based on the message which database client should be used to process
     * the message handler and the update to the message in the outbox/inbox table.
     * @param message The stored message
     * @returns The PostgreSQL client to use to process the message
     */
    getClient: (message: StoredTransactionalMessage) => Promise<DatabaseClient>;
    shutdown: () => Promise<void>;
}
/**
 * The default message processing uses a single pool based on the configured
 * `pgConfig` settings.
 */
export declare const defaultMessageProcessingDbClientStrategy: (config: FullListenerConfig, logger: TransactionalLogger) => MessageProcessingDbClientStrategy;
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