1 /* 2 * Copyright (C) 2019 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 dagger.example.atm; 18 19 import java.math.BigDecimal; 20 import javax.inject.Inject; 21 22 /** Maintains the withdrawal amount available within a user session. */ 23 @PerSession 24 final class WithdrawalLimiter { 25 private BigDecimal remainingWithdrawalLimit; 26 27 @Inject WithdrawalLimiter(@aximumWithdrawal BigDecimal maximumWithdrawal)28 WithdrawalLimiter(@MaximumWithdrawal BigDecimal maximumWithdrawal) { 29 this.remainingWithdrawalLimit = maximumWithdrawal; 30 } 31 recordDeposit(BigDecimal amount)32 void recordDeposit(BigDecimal amount) { 33 remainingWithdrawalLimit = remainingWithdrawalLimit.add(amount); 34 } 35 recordWithdrawal(BigDecimal amount)36 void recordWithdrawal(BigDecimal amount) { 37 remainingWithdrawalLimit = remainingWithdrawalLimit.subtract(amount); 38 } 39 remainingWithdrawalLimit()40 BigDecimal remainingWithdrawalLimit() { 41 return remainingWithdrawalLimit; 42 } 43 } 44