Understanding the SPI Extension Pattern
Why SPI matters Framework authors often need to hand over execution to third parties without touching the core code. Java’s Service Provider Interface (SPI) solves this by letting the framework publish contracts while external providers deliver implementations. The two sides meet through a well-defined loading routine. Visualising the flow briefly: Framework interface -> Provider implementation -> Runtime invocation | | | API contract META-INF/services file ServiceLoader wiring The framework owns the interfaces and life-cycle, providers contribute implementations, and ServiceLoader stitches things together at runtime. ...