APT based dependency injection for server side developers - https://avaje.io/inject

import io.avaje.inject.spi.AvajeModule;

module org.example {

    requires io.avaje.inject;

    provides io.avaje.inject.spi.AvajeModule with org.example.ExampleModule;
}

• Uses Java annotation processing for dependency injection
• Generates source code
• Avoids any use of reflection or classpath scanning (so low overhead and fast startup)
• A Library only (a DI library and that's it ~25k in size)

• Aimed specifically for server side development (rather than Andriod)
• Supports lifecycle methods with @PostConstruct and @PreDestroy
• Supports @Factory and @Bean
• Provides API to obtain all bean instances that implement an interface
• Provides API to obtain all bean instances that have an annotation
• Integration with server side web frameworks like Rapidoid, Sparkjava, Javlin etc

• Generates source code rather that bytecode
• Generates construction order at compile time
• Aiming to be a Library only (so a DI library and that's it without any dependencies)
• Expected to stay a lot smaller with minimal dependencies
• Expected to be faster due to the pre-ordering of construction in generated code

• Avaje inject only has Singleton scope
• Avaje inject doesn't support @Value (use avaje config)
• Avaje inject provides similar DI features but with code generation via APT and hence much lower startup time and much lower cost (so better suited to micro-services).
• No use of reflection or scanning even for multi-module dependency injection

• Additionally library for reading configuration / application.yaml
• Configuration supports onChange listening (aka dynamic configuration API)