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
17package com.android.server.notification;
18
19
20/**
21 * {@hide}
22 */
23public class AlertRateLimiter {
24    static final long ALLOWED_ALERT_INTERVAL = 1000;
25    private long mLastNotificationMillis = 0;
26
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