Custom 404 Response - Micronaut Typing CST Test

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Custom 404 Response — Micronaut Code

Custom error handling for 404 requests.

import io.micronaut.http.annotation.*;
import io.micronaut.http.HttpResponse;
import io.micronaut.http.server.exceptions.ExceptionHandler;
import javax.inject.Singleton;
import io.micronaut.http.HttpRequest;
import io.micronaut.http.HttpStatus;
import io.micronaut.web.router.exceptions.NoRouteFoundException;

@Singleton
class NotFoundHandler implements ExceptionHandler<NoRouteFoundException, HttpResponse> {
	@Override
	public HttpResponse handle(HttpRequest request, NoRouteFoundException exception) {
		return HttpResponse.status(HttpStatus.NOT_FOUND).body("Custom 404 Not Found");
	}
}

Micronaut Language Guide

Micronaut is a modern, JVM-based full-stack framework for building modular, easily testable microservices and serverless applications. It emphasizes low memory footprint, fast startup, and compile-time dependency injection.

Primary Use Cases

▸Microservices architecture
▸Serverless applications
▸Reactive APIs and streaming services
▸Cloud-native applications with service discovery
▸IoT backends with low memory footprint

Notable Features

▸Compile-time dependency injection
▸Fast startup and low memory footprint
▸Reactive and non-blocking I/O
▸Cloud-native support (Kubernetes, AWS Lambda, etc.)
▸AOP and declarative HTTP clients

Origin & Creator

Micronaut was created by Object Computing, Inc. (OCI), with Graeme Rocher as the lead architect, first released in 2018.

Industrial Note

Micronaut is optimized for microservices, serverless deployments, and environments where fast startup, low memory usage, and reactive I/O are critical.

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Custom 404 Response — Micronaut Code

Custom error handling for 404 requests.

import io.micronaut.http.annotation.*; import io.micronaut.http.HttpResponse; import io.micronaut.http.server.exceptions.ExceptionHandler; import javax.inject.Singleton; import io.micronaut.http.HttpRequest; import io.micronaut.http.HttpStatus; import io.micronaut.web.router.exceptions.NoRouteFoundException; @Singleton class NotFoundHandler implements ExceptionHandler<NoRouteFoundException, HttpResponse> { @Override public HttpResponse handle(HttpRequest request, NoRouteFoundException exception) { return HttpResponse.status(HttpStatus.NOT_FOUND).body("Custom 404 Not Found"); } }

Micronaut Language Guide

Primary Use Cases

▸Microservices architecture
▸Serverless applications
▸Reactive APIs and streaming services
▸Cloud-native applications with service discovery
▸IoT backends with low memory footprint

Notable Features

▸Compile-time dependency injection
▸Fast startup and low memory footprint
▸Reactive and non-blocking I/O
▸Cloud-native support (Kubernetes, AWS Lambda, etc.)
▸AOP and declarative HTTP clients

Origin & Creator

Micronaut was created by Object Computing, Inc. (OCI), with Graeme Rocher as the lead architect, first released in 2018.

Industrial Note

Micronaut is optimized for microservices, serverless deployments, and environments where fast startup, low memory usage, and reactive I/O are critical.