1 /* 2 * Copyright (C) 2020 The Dagger Authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package example.dagger; 18 19 import dagger.Lazy; 20 import javax.inject.Inject; 21 22 /** A coffee maker to brew the coffee. */ 23 public class CoffeeMaker { 24 private final CoffeeLogger logger; 25 private final Lazy<Heater> heater; // Create a possibly costly heater only when we use it. 26 private final Pump pump; 27 28 @Inject CoffeeMaker(CoffeeLogger logger, Lazy<Heater> heater, Pump pump)29 CoffeeMaker(CoffeeLogger logger, Lazy<Heater> heater, Pump pump) { 30 this.logger = logger; 31 this.heater = heater; 32 this.pump = pump; 33 } 34 brew()35 public void brew() { 36 heater.get().on(); 37 pump.pump(); 38 logger.log(" [_]P coffee! [_]P "); 39 heater.get().off(); 40 } 41 } 42