| // Copyright 2018 The Feed Authors. |
| // |
| // 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.google.android.libraries.feed.feedstore; |
| |
| import com.google.android.libraries.feed.api.host.storage.CommitResult; |
| import com.google.android.libraries.feed.api.host.storage.JournalMutation; |
| import com.google.android.libraries.feed.api.host.storage.JournalStorage; |
| import com.google.android.libraries.feed.api.host.storage.JournalStorageDirect; |
| import com.google.android.libraries.feed.common.Result; |
| import com.google.android.libraries.feed.common.concurrent.MainThreadCaller; |
| import com.google.android.libraries.feed.common.concurrent.MainThreadRunner; |
| import java.util.List; |
| |
| /** |
| * An implementation of {@link JournalStorageDirect} which converts {@link JournalStorage} to a |
| * synchronized implementation. This acts as a wrapper class over JournalStorage. It will provide a |
| * consumer calling on the main thread and waiting on a Future to complete to return the consumer |
| * results. |
| */ |
| public final class JournalStorageDirectImpl extends MainThreadCaller |
| implements JournalStorageDirect { |
| private static final String LOCATION = "JournalStorage."; |
| private final JournalStorage journalStorage; |
| |
| public JournalStorageDirectImpl( |
| JournalStorage journalStorage, MainThreadRunner mainThreadRunner) { |
| super(mainThreadRunner); |
| this.journalStorage = journalStorage; |
| } |
| |
| @Override |
| public Result<List<byte[]>> read(String journalName) { |
| return mainThreadCaller( |
| LOCATION + "read", |
| (consumer) -> journalStorage.read(journalName, consumer), |
| Result.failure()); |
| } |
| |
| @Override |
| public CommitResult commit(JournalMutation mutation) { |
| return mainThreadCaller( |
| LOCATION + "commit", |
| (consumer) -> journalStorage.commit(mutation, consumer), |
| CommitResult.FAILURE); |
| } |
| |
| @Override |
| public Result<Boolean> exists(String journalName) { |
| return mainThreadCaller( |
| LOCATION + "exists", |
| (consumer) -> journalStorage.exists(journalName, consumer), |
| Result.failure()); |
| } |
| |
| @Override |
| public Result<List<String>> getAllJournals() { |
| return mainThreadCaller( |
| LOCATION + "getAllJournals", journalStorage::getAllJournals, Result.failure()); |
| } |
| |
| @Override |
| public CommitResult deleteAll() { |
| return mainThreadCaller( |
| LOCATION + "deleteAll", journalStorage::deleteAll, CommitResult.FAILURE); |
| } |
| } |