spring.travel.site.services.UserService.java Source code

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Here is the source code for spring.travel.site.services.UserService.java

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/**
 * Copyright 2014 Andy Godwin
 *
 * 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 spring.travel.site.services;

import com.fasterxml.jackson.core.type.TypeReference;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import spring.travel.site.model.user.User;

import java.util.Optional;
import java.util.concurrent.CompletableFuture;

import static uk.co.sdev.async.Futures.none;
import static uk.co.sdev.async.Futures.withFallback;

@Service
public class UserService {

    @Autowired
    private HttpClient client;

    @Value("${user.service.url}")
    private String userServiceUrl;

    public CompletableFuture<Optional<User>> user(Optional<String> id) {
        return id.<CompletableFuture<Optional<User>>>map(
                i -> client.get(url(i), new TypeReference<Optional<User>>() {
                }).handle(withFallback(Optional.<User>empty()))).orElse(none());
    }

    private String url(String id) {
        return new StringBuilder(userServiceUrl).append("?id=").append(id).toString();
    }
}