diff options
Diffstat (limited to 'java/com/android/voicemail/impl/sync/VvmNetworkRequest.java')
-rw-r--r-- | java/com/android/voicemail/impl/sync/VvmNetworkRequest.java | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/java/com/android/voicemail/impl/sync/VvmNetworkRequest.java b/java/com/android/voicemail/impl/sync/VvmNetworkRequest.java new file mode 100644 index 000000000..189dc8f2b --- /dev/null +++ b/java/com/android/voicemail/impl/sync/VvmNetworkRequest.java @@ -0,0 +1,120 @@ +/* + * 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. + */ +@SuppressWarnings("AndroidApiChecker") /* CompletableFuture is java8*/ +@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 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); + } + } +} |