5. ModelService Advanced Features

The ModelService interface provides system-level controls, particularly for the automatic DDL (Data Definition Language) generation mechanism.

5.1 Dry Run Mode (isDryRun)

If you want to inspect what SQL changes the framework would make to your database schema without actually applying them (safe mode), use Dry Run.

// Enable Dry Run
modelService.setDryRun(true);

// Trigger model update (normally happens at startup)
modelService.update(User.class);

// Disable Dry Run for normal operation
modelService.setDryRun(false);

5.2 DDL Logging (setLogPath)

You can configure the framework to write the generated CREATE TABLE / ALTER TABLE statements to a file instead of (or in addition to) executing them. This is excellent for auditing schema changes.

// Set the path for DDL logs
modelService.setLogPath("/var/logs/app/ddl-changes.sql");

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