As projection can be restarted, deleted and created differently. When the projection knows how to setup it itself, it's easy to rebuild it when change is needed.
And inside the projection we need to implement ProjectionInitialization to tell Ecotone what to do:
#[ProjectionInitialization]
public function initialization() : void
{
$this->connection->executeStatement(<<<SQL
CREATE TABLE IF NOT EXISTS in_progress_tickets (
ticket_id VARCHAR(36) PRIMARY KEY,
ticket_type VARCHAR(25)
)
SQL);
}
With Polling projections, your projection will be initialized automatically.
With Event Driven projections, your projections will not be created on startup, consider running command first.
Resetting/Rebuilding the projection
In order to restart the projection in case we want to provide incompatible change, we can simply reset the projection and it will build up from the beginning.
This can come in handy is specific situations. E.g. in case of asynchronous event-driven projection failed in the middle of resetting. Instead of resetting it again or waiting for event which will trigger your projection, you can do it manually.