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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* Copyright (C) 2016 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.voicemailomtp.sync;
import android.annotation.TargetApi;
import android.net.Network;
import android.os.Build.VERSION_CODES;
import android.support.annotation.NonNull;
import android.telecom.PhoneAccountHandle;
import com.android.voicemailomtp.OmtpVvmCarrierConfigHelper;
import com.android.voicemailomtp.VoicemailStatus;
import com.android.voicemailomtp.VvmLog;
import java.io.Closeable;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
/**
* Class to retrieve a {@link Network} synchronously. {@link #getNetwork(OmtpVvmCarrierConfigHelper,
* PhoneAccountHandle)} will block until a suitable network is retrieved or it has failed.
*/
@SuppressWarnings("AndroidApiChecker") /* CompletableFuture is java8*/
@TargetApi(VERSION_CODES.CUR_DEVELOPMENT)
public class VvmNetworkRequest {
private static final String TAG = "VvmNetworkRequest";
/**
* A wrapper around a Network returned by a {@link VvmNetworkRequestCallback}, which should be
* closed once not needed anymore.
*/
public static class NetworkWrapper implements Closeable {
private final Network mNetwork;
private final VvmNetworkRequestCallback mCallback;
private NetworkWrapper(Network network, VvmNetworkRequestCallback callback) {
mNetwork = network;
mCallback = callback;
}
public Network get() {
return mNetwork;
}
@Override
public void close() {
mCallback.releaseNetwork();
}
}
public static class RequestFailedException extends Exception {
private RequestFailedException(Throwable cause) {
super(cause);
}
}
@NonNull
public static NetworkWrapper getNetwork(OmtpVvmCarrierConfigHelper config,
PhoneAccountHandle handle, VoicemailStatus.Editor status) throws RequestFailedException {
FutureNetworkRequestCallback callback = new FutureNetworkRequestCallback(config, handle,
status);
callback.requestNetwork();
try {
return callback.getFuture().get();
} catch (InterruptedException | ExecutionException e) {
callback.releaseNetwork();
VvmLog.e(TAG, "can't get future network", e);
throw new RequestFailedException(e);
}
}
private static class FutureNetworkRequestCallback extends VvmNetworkRequestCallback {
/**
* {@link CompletableFuture#get()} will block until {@link CompletableFuture#
* complete(Object) } has been called on the other thread.
*/
private final CompletableFuture<NetworkWrapper> mFuture = new CompletableFuture<>();
public FutureNetworkRequestCallback(OmtpVvmCarrierConfigHelper config,
PhoneAccountHandle phoneAccount, VoicemailStatus.Editor status) {
super(config, phoneAccount, status);
}
public Future<NetworkWrapper> getFuture() {
return mFuture;
}
@Override
public void onAvailable(Network network) {
super.onAvailable(network);
mFuture.complete(new NetworkWrapper(network, this));
}
@Override
public void onFailed(String reason) {
super.onFailed(reason);
mFuture.complete(null);
}
}
}
|
