9. Engine extensions

Dataway connects application functions, external fragments and host resources through DatawayConfig. It builds execution with HostConfiguration → QueryManager → QueryBuilder → Query. Each guide covers implementation, registration and script usage.

Usage guide

• Custom functions: Expose individual application functions.
• Function libraries: Group functions under a namespace.
• Application imports: Reuse application objects and dependencies through imports.
• Fragment processors: Interpret and execute custom external blocks.
• Finder: Configure object lookup and resource/class loading.
• Custom scopes: Supply default parameters and application environments.
• Engine and query configuration: Configure the engine and queries, and supply application objects to extensions.
• SQL interceptors: Observe or control JDBC execution.
• SQL fragments: Register named SQL fragments shared by queries.
• SQL rules: Add application-specific dynamic SQL rules.
• SQL type handlers: Customize JDBC parameter writing and result reading.
• SQL dialects: Customize SQL generation for page and count queries.