Java tutorial
/* * Copyright 2012 Alexander Shabanov - http://alexshabanov.com. * 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.alexshabanov.springrestapi; import com.alexshabanov.springrestapi.rest.client.BankAccountRestClientService; import com.alexshabanov.springrestapi.rest.client.UserRestClientService; import com.alexshabanov.springrestapi.service.BankAccountService; import com.alexshabanov.springrestapi.service.UserService; import org.springframework.context.ConfigurableApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.client.RestOperations; import org.springframework.web.client.RestTemplate; import javax.inject.Inject; import java.security.SecureRandom; import java.util.Random; /** * Entry point. */ public final class App { private static final String APP_URL = "http://127.0.0.1:9090/server-app"; public static void main(String[] args) { System.out.println("Client app demo, expecting server to be available at " + APP_URL); final ConfigurableApplicationContext applicationContext = new AnnotationConfigApplicationContext( App.Config.class); applicationContext.start(); try { applicationContext.getBean(Runnable.class).run(); } finally { applicationContext.close(); } } public static class AppMain implements Runnable { @Inject private UserService userService; private static final String[] NAMES = { "alex", "alice", "ann", "bob", "boris", "cavin", "codd", "dan", "eva", "fred", "harry", "inna", "james", "jane", "jeff", "kael", "laura", "mark", "neil", "ozzy", "peter", "richard", "suzannah", "trevor", "uma", "victor", "victoria", "wolf", "xena", "yvette", "zed" }; private final Random random = new SecureRandom(); @Override public void run() { // run application // [1] add user final int id = userService.register(NAMES[random.nextInt(NAMES.length)] + "#" + random.nextInt(10)); System.out.println("Registered user with ID = " + id); // [2] get all the users System.out.println("Current users: " + userService.findAll()); } } @Configuration public static class Config { @Bean public BankAccountService bankAccountService() { return new BankAccountRestClientService(APP_URL, restOperations()); } @Bean public UserService userRestClientService() { return new UserRestClientService(APP_URL, restOperations()); } @Bean public RestOperations restOperations() { return new RestTemplate(); } @Bean public Runnable runner() { return new AppMain(); } } }