EchoHandler.java

package example.uppercase;

import com.microsoft.azure.functions.ExecutionContext;
import com.microsoft.azure.functions.HttpMethod;
import com.microsoft.azure.functions.HttpRequestMessage;
import com.microsoft.azure.functions.annotation.AuthorizationLevel;
import com.microsoft.azure.functions.annotation.FunctionName;
import com.microsoft.azure.functions.annotation.HttpTrigger;

import java.util.Optional;
import java.util.function.Function;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.function.adapter.azure.FunctionInvoker;
import org.springframework.messaging.Message;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.stereotype.Component;

@Component
public class EchoHandler {

	@Autowired
	private Function<String, String> echo;

	@FunctionName("echo")
	public String execute(@HttpTrigger(name = "req", methods = {HttpMethod.GET,
			HttpMethod.POST}, authLevel = AuthorizationLevel.ANONYMOUS) HttpRequestMessage<Optional<String>> request,
		ExecutionContext context) {
		return echo.apply(request.getBody().get());
	}
}