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Project Settings

Project settings control application runtime behavior, server configurations, language settings, and workflow configuration. MDL provides commands to inspect and modify all settings categories.

Inspecting Settings

-- Overview of all settings
SHOW SETTINGS;

-- Full MDL output (round-trippable)
DESCRIBE SETTINGS;

ALTER SETTINGS

Settings are organized into categories. Each ALTER SETTINGS command targets one category.

Model Settings

Runtime-level settings such as the after-startup microflow, hashing algorithm, and Java version:

ALTER SETTINGS MODEL <Key> = <Value>;

Examples:

ALTER SETTINGS MODEL AfterStartupMicroflow = 'MyModule.ACT_Startup';
ALTER SETTINGS MODEL HashAlgorithm = 'BCrypt';
ALTER SETTINGS MODEL JavaVersion = '17';

Configuration Settings

Server configuration settings like database type, URL, and HTTP port. Each configuration is identified by name (commonly 'default'):

ALTER SETTINGS CONFIGURATION '<Name>' <Key> = <Value>;

Examples:

ALTER SETTINGS CONFIGURATION 'default' DatabaseType = 'POSTGRESQL';
ALTER SETTINGS CONFIGURATION 'default' DatabaseUrl = 'jdbc:postgresql://localhost:5432/myapp';
ALTER SETTINGS CONFIGURATION 'default' HttpPortNumber = '8080';

Constant Overrides

Override a constant value within a specific configuration:

ALTER SETTINGS CONSTANT '<ConstantName>' VALUE '<value>' IN CONFIGURATION '<cfg>';

Example:

ALTER SETTINGS CONSTANT 'MyModule.ApiBaseUrl' VALUE 'https://staging.example.com' IN CONFIGURATION 'default';

Language Settings

Set the default language for the application:

ALTER SETTINGS LANGUAGE <Key> = <Value>;

Example:

ALTER SETTINGS LANGUAGE DefaultLanguageCode = 'en_US';

Workflow Settings

Configure workflow behavior such as the user entity and task parallelism:

ALTER SETTINGS WORKFLOWS <Key> = <Value>;

Examples:

ALTER SETTINGS WORKFLOWS UserEntity = 'Administration.Account';
ALTER SETTINGS WORKFLOWS DefaultTaskParallelism = '5';

See Also