The Framework Redefining Java for Microservices and Beyond
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The document introduces Micronaut, a modern JVM-based framework optimized for microservices and cloud-native applications, emphasizing its compile-time processing for faster startup and lower memory usage compared to Spring Boot. It discusses key concepts like ahead-of-time compilation, compile-time dependency injection, and the importance of avoiding runtime reflection for performance benefits. The document also highlights scenarios where reflection is still necessary and provides comparisons between Micronaut and Spring Boot in their operational characteristics.
![Use Cases where Reflection is required
[
{
"name": "org.cm.transformer.StringCapitalizer",
"methods": [
{
"name": "capitalize",
"parameterTypes": [
"java.lang.String"
]
}
]
},
{
"name": "org.cm.transformer.StringReverser",
"methods": [
{
"name": "reverse",
"parameterTypes": [
"java.lang.String"
]
}](https://image.slidesharecdn.com/jdcpp-241221185013-44cddd9a/85/The-Framework-Redefining-Java-for-Microservices-and-Beyond-9-320.jpg)
The Framework Redefining Java for Microservices and Beyond
- 1. The Framework Redefining Java for Microservices and Beyond
- 2. •Introduction to Micronaut •Key differences: Compile-time vs. Runtime •How Micronaut uses Ahead-of-Time (AOT) compilation •Why avoiding runtime reflection is important •Use cases where reflection is still required •Micronaut or Spring Boot Agenda
- 3. Introduction to Micronaut - Modern, JVM-based framework - Designed for microservices and cloud-native applications - Focuses on low memory footprint and fast startup time - Compile-time dependency injection and AOP
- 4. Key differences: Compile-time vs. Runtime Spring Boot Micronaut(Compile time) Startup Time 5-10 seconds 1-2 seconds Memory Usage 250-350MB 50-100MB Bean Creation Runtime reflection Direct instantiation Proxy Generation Runtime dynamic proxies Compile-time generated Configuration Runtime processing Compile-time processing Class Loading Full classpath scan Pre-computed metadata Hot Reload Supported Limited support
- 5. Just In Time (JIT) Image Credit: azul
- 7. Ahead-of-Time (AOT) compilation • Compilation Process •AOT compiles code before the application starts •Generate native machine code that can be directly executed by CPU •Reduce runtime overhead and speed up start up time •Compile time Dependency Injection •Proxy Less Design • Key Benefits • Faster Startup time • Reduce Memory Consumption •Lower Runtime performance overhead • More predictable memory usages
- 9. Use Cases where Reflection is required [ { "name": "org.cm.transformer.StringCapitalizer", "methods": [ { "name": "capitalize", "parameterTypes": [ "java.lang.String" ] } ] }, { "name": "org.cm.transformer.StringReverser", "methods": [ { "name": "reverse", "parameterTypes": [ "java.lang.String" ] }
- 10. Why Runtime Reflection is important •Flexibility •AOP •Dynamic Behavior
- 11. How proxy generates additional reflection-based method invocations
- 12. Micronaut or Spring Boot
- 13. Any Question?