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/*
* 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.voicemail.impl.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.voicemail.impl.OmtpVvmCarrierConfigHelper;
import com.android.voicemail.impl.VoicemailStatus;
import com.android.voicemail.impl.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.
*/
@TargetApi(VERSION_CODES.O)
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 network;
private final VvmNetworkRequestCallback callback;
private NetworkWrapper(Network network, VvmNetworkRequestCallback callback) {
this.network = network;
this.callback = callback;
}
public Network get() {
return network;
}
@Override
public void close() {
callback.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> future = new CompletableFuture<>();
public FutureNetworkRequestCallback(
OmtpVvmCarrierConfigHelper config,
PhoneAccountHandle phoneAccount,
VoicemailStatus.Editor status) {
super(config, phoneAccount, status);
}
public Future<NetworkWrapper> getFuture() {
return future;
}
@Override
public void onAvailable(Network network) {
super.onAvailable(network);
future.complete(new NetworkWrapper(network, this));
}
@Override
public void onFailed(String reason) {
super.onFailed(reason);
future.complete(null);
}
}
}
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