1 /*
2  * Copyright (C) 2017 The Android Open Source Project
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 com.android.server.notification;
18 
19 
20 /**
21  * {@hide}
22  */
23 public class AlertRateLimiter {
24     static final long ALLOWED_ALERT_INTERVAL = 1000;
25     private long mLastNotificationMillis = 0;
26 
shouldRateLimitAlert(long now)27    boolean shouldRateLimitAlert(long now) {
28         final long millisSinceLast = now - mLastNotificationMillis;
29         if (millisSinceLast < 0 || millisSinceLast < ALLOWED_ALERT_INTERVAL) {
30             return true;
31         }
32         mLastNotificationMillis = now;
33         return false;
34     }
35 }
36