Spring cloud functions with Fn

Spring cloud function is a Spring project for building Java functions with the (optional) support of the spring framework.

We support execution of Spring cloud functions through the SpringCloudFunctionInvoker which manages the discovery and invocation of your functions.

Tutorial

The minimal necessary function you must provide is:

cmd: com.example.fn.FunctionConfig::handleRequest

package com.example.fn;

import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;


@Configuration
@Import(ContextFunctionCatalogAutoConfiguration.class)
public class FunctionConfig {
    public static String consumedValue;
    public static String suppliedValue = "Hello";

    @FnConfiguration
    public static void configure(RuntimeContext ctx) {
        ctx.setInvoker(new SpringCloudFunctionInvoker(FunctionConfig.class));
    }


    // Blank entrypoint necessary to load the FunctionConfig class, this isn't invoked
    public void handleRequest() { }
	
	@Bean
	public Function<String, String> upperCase(){
	    return String::toUpperCase;
	}
}