Frontend.java

/*
 * Copyright 2018 Expedia, Inc.
 *
 *       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
 *
 *           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 com.expedia.haystack.opentracing.spring.example;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@EnableAutoConfiguration
@RestController
public class Frontend {
    @Value("${backend.url:http://localhost:9091}")
    private String backendBaseUrl;

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping("/hello")
    public String callBackend() {
        return restTemplate.getForObject(backendBaseUrl + "/api/hello", String.class);
    }

    @Bean
    RestTemplate restTemplate() {
        return new RestTemplate();
    }
}