1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* Copyright 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.bluetooth;
import android.provider.DeviceConfig;
import android.provider.DeviceConfig.Properties;
import android.util.Log;
import java.util.ArrayList;
import java.util.HashMap;
/**
* The BluetoothDeviceConfigChangeTracker receives changes to the DeviceConfig for
* NAMESPACE_BLUETOOTH, and determines whether we should queue a restart, if any Bluetooth-related
* INIT_ flags have been changed.
*
* <p>The initialProperties should be fetched from the BLUETOOTH namespace in DeviceConfig
*/
public final class BluetoothDeviceConfigChangeTracker {
private static final String TAG = "BluetoothDeviceConfigChangeTracker";
private final HashMap<String, String> mCurrFlags;
public BluetoothDeviceConfigChangeTracker(Properties initialProperties) {
mCurrFlags = getFlags(initialProperties);
}
/**
* Updates the instance state tracking the latest init flag values, and determines whether an
* init flag has changed (requiring a restart at some point)
*/
public boolean shouldRestartWhenPropertiesUpdated(Properties newProperties) {
if (!newProperties.getNamespace().equals(DeviceConfig.NAMESPACE_BLUETOOTH)) {
return false;
}
ArrayList<String> flags = new ArrayList<>();
for (String name : newProperties.getKeyset()) {
flags.add(name + "='" + newProperties.getString(name, "") + "'");
}
Log.d(TAG, "shouldRestartWhenPropertiesUpdated: " + String.join(",", flags));
boolean shouldRestart = false;
for (String name : newProperties.getKeyset()) {
if (!isInitFlag(name)) {
continue;
}
var oldValue = mCurrFlags.get(name);
var newValue = newProperties.getString(name, "");
if (newValue.equals(oldValue)) {
continue;
}
Log.d(TAG, "Property " + name + " changed from " + oldValue + " -> " + newValue);
mCurrFlags.put(name, newValue);
shouldRestart = true;
}
return shouldRestart;
}
private HashMap<String, String> getFlags(Properties initialProperties) {
var out = new HashMap();
for (var name : initialProperties.getKeyset()) {
if (isInitFlag(name)) {
out.put(name, initialProperties.getString(name, ""));
}
}
return out;
}
private Boolean isInitFlag(String flagName) {
return flagName.startsWith("INIT_");
}
}
|
