Overview

Overview

Tentacolous is a Spring Boot library that runs Java methods when a database table receives an INSERT, UPDATE, or DELETE.

The important difference is that Tentacolous reacts to database changes regardless of where they originate.

Version 0.2.0 adds database-agnostic execution. The same listener and filter API now works with PostgreSQL, MySQL, MariaDB, SQL Server, Oracle, and SQLite through automatically detected dialects.

Version 0.3.0 adds message-broker sinks. Every change can also be forwarded to Kafka or RabbitMQ. See Message brokers.

1. It creates an event table.

2. It creates database-specific event infrastructure and triggers.

3. It creates triggers for tables that have listeners.

4. The triggers write events into db_change_event.

5. A Spring poller reads those events.

6. Tentacolous converts the JSON payload into your Java entity.

7. Tentacolous runs the annotated method.

8. Optionally, Tentacolous forwards the same change to a message broker (Kafka, RabbitMQ) through a ChangeEventSink. See Message brokers.