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 #pragma once
18 
19 #include "config/ConfigKey.h"
20 
21 #include <utils/RefBase.h>
22 #include <string>
23 
24 namespace android {
25 namespace os {
26 namespace statsd {
27 
28 using android::RefBase;
29 using std::string;
30 
31 /**
32  * Callback for different subsystems inside statsd to implement to find out
33  * when a configuration has been added, updated or removed.
34  */
35 class ConfigListener : public virtual RefBase {
36 public:
37     ConfigListener();
38     virtual ~ConfigListener();
39 
40     /**
41      * A configuration was added or updated.
42      */
43     virtual void OnConfigUpdated(const int64_t timestampNs, const ConfigKey& key,
44                                  const StatsdConfig& config) = 0;
45 
46     /**
47      * A configuration was removed.
48      */
49     virtual void OnConfigRemoved(const ConfigKey& key) = 0;
50 };
51 
52 }  // namespace statsd
53 }  // namespace os
54 }  // namespace android
55