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