del Amo https://sergiodelamo.com @sdelamo Member of the Micronaut Foundation Board of Directors Micronaut Developer Advocate Involved with Micronaut since its inception. Micronaut Core committer. Micronaut Guides. Micronaut Starter, Security, AWS, Views, RSS, Problem+JSON, Email, 2
JVM Framework ❖ Micronaut was designed from scratch in 2017, focused on modern architectures like microservices and serverless, with the cloud in mind. 7 All application types ❖ Micronaut is a complete solution for any type of application: microservices, message-driven producers or consumers, command-line apps, serverless functions Highly optimized ❖ Micronaut leverages Java annotation processors and other optimizations to compute the framework infrastructure at compile-time, drastically reducing startup time and memory consumption.
Ahead of Time Micronaut computes at build time: ‣ All dependency and configuration injection ‣ Annotation metadata (meta annotations) ‣ AOP proxies ‣ Bean introspections ‣ All other framework infrastructure At runtime ‣ No reflection. ‣ No proxy generation. ‣ No dynamic classloading. ‣ No classpath scanning. 8
Dependency Injection ❖ Can use JSR-330 (@Inject) annotations 9 ❖ Properties, YAML, TOML, Groovy, Config4K. Validation support ❖ Built-in reflection free, faster startup, smaller JAR, reduced memory. ❖ Hibernate Validation: full Bean Validation API compliance. AOP: Aspect-Oriented Programing ❖ Compile-time, reflection free. HTTP Client ❖ Micronaut includes an HTTP client that has both a low-level API and a higher-level AOP-driven API.
31 Groovy Specific Modules Dependency Description micronaut-inject-groovy Include AST transformations to generate bean definitions. Should be compileOnly on your classpath. micronaut-runtime-groovy Adds the ability to specify configuration placed in src/main/resources in Groovy format (i.e. application.groovy) micronaut-function-groovy Include AST transforms that make it easier to write Functions for AWS Lambda
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