dubbo-spring-boot-samples/auto-configure-samples/provider-sample/src/main/java/org/apache/dubbo/spring/boot/sample/provider/service/DefaultDemoService.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *     http://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 org.apache.dubbo.spring.boot.sample.provider.service;

import org.apache.dubbo.config.annotation.DubboService;
import org.apache.dubbo.spring.boot.sample.consumer.DemoService;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;

import java.util.Random;

/**
 * Default {@link DemoService}
 *
 * @see DemoService
 * @since 2.7.0
 */
@DubboService(version = "1.0.0")
public class DefaultDemoService implements DemoService {

    private final Logger logger = LoggerFactory.getLogger(getClass());

    private final Random costTimeRandom = new Random();

    /**
     * The default value of ${dubbo.application.name} is ${spring.application.name}
     */
    @Value("${dubbo.application.name}")
    private String serviceName;

    @Override
    public String sayHello(String name) {
        await();
        return String.format("[%s] : Hello, %s", serviceName, name);
    }

    private void await() {
        try {
            long timeInMillisToWait = costTimeRandom.nextInt(500);
            Thread.sleep(timeInMillisToWait);
            logger.info("execution time : " + timeInMillisToWait + " ms.");
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }
}