/*
 * Copyright 2019-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package example;

import java.util.function.Function;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.integration.dsl.IntegrationFlow;
import org.springframework.integration.dsl.IntegrationFlows;
import org.springframework.integration.handler.LoggingHandler;
import org.springframework.messaging.Message;

@SpringBootApplication
public class FunctionSampleSpringIntegrationApplication {

	public static void main(String[] args) {
		SpringApplication.run(FunctionSampleSpringIntegrationApplication.class, args);
	}

	@Bean
	public IntegrationFlow uppercaseFlow() {
		return IntegrationFlows.from(MessageFunction.class, (gateway) -> gateway.beanName("uppercase"))
				.<String, String>transform(String::toUpperCase)
				.logAndReply(LoggingHandler.Level.WARN);
	}

	public interface MessageFunction extends Function<Message<String>, Message<String>> {

	}

}
