| /* |
| * Copyright 2022 Google LLC |
| * |
| * 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.mobiledatadownload.populator; |
| |
| import android.util.Log; |
| import com.google.android.libraries.mobiledatadownload.AddFileGroupRequest; |
| import com.google.android.libraries.mobiledatadownload.FileGroupPopulator; |
| import com.google.android.libraries.mobiledatadownload.MobileDataDownload; |
| import com.google.android.libraries.mobiledatadownload.internal.logging.LogUtil; |
| import com.google.common.base.Optional; |
| import com.google.common.base.Supplier; |
| import com.google.common.util.concurrent.FutureCallback; |
| import com.google.common.util.concurrent.Futures; |
| import com.google.common.util.concurrent.ListenableFuture; |
| import com.google.common.util.concurrent.MoreExecutors; |
| import com.google.mobiledatadownload.DownloadConfigProto.DataFileGroup; |
| |
| /** |
| * FileGroupPopulator that gets a single file group from a supplier and populates it. |
| * |
| * <p>Client can set an optional file group overrider to override fields in the {@link |
| * DataFileGroup} if needed. |
| * |
| * <p>The overrider could also be used for on device targeting and filtering in the case that the |
| * file group is provided from a server. |
| */ |
| public final class SingleDataFileGroupPopulator implements FileGroupPopulator { |
| |
| private static final String TAG = "SingleDataFileGroupPop"; |
| |
| /** Builder for {@link SingleDataFileGroupPopulator}. */ |
| public static final class Builder { |
| private Supplier<DataFileGroup> dataFileGroupSupplier; |
| private Optional<DataFileGroupOverrider> overriderOptional = Optional.absent(); |
| |
| public Builder setDataFileGroupSupplier(Supplier<DataFileGroup> dataFileGroupSupplier) { |
| this.dataFileGroupSupplier = dataFileGroupSupplier; |
| return this; |
| } |
| |
| /** |
| * Sets the optional file group overrider that takes the {@link DataFileGroup} and returns a |
| * {@link DataFileGroup} after being overridden. If the overrider returns a null data file |
| * group, nothing will be populated. |
| */ |
| public Builder setOverriderOptional(Optional<DataFileGroupOverrider> overriderOptional) { |
| this.overriderOptional = overriderOptional; |
| return this; |
| } |
| |
| public SingleDataFileGroupPopulator build() { |
| return new SingleDataFileGroupPopulator(this); |
| } |
| } |
| |
| private final Supplier<DataFileGroup> dataFileGroupSupplier; |
| private final Optional<DataFileGroupOverrider> overriderOptional; |
| |
| /** Returns a Builder for SingleDataFileGroupPopulator. */ |
| public static Builder builder() { |
| return new Builder(); |
| } |
| |
| private SingleDataFileGroupPopulator(Builder builder) { |
| this.dataFileGroupSupplier = builder.dataFileGroupSupplier; |
| this.overriderOptional = builder.overriderOptional; |
| } |
| |
| @Override |
| public ListenableFuture<Void> refreshFileGroups(MobileDataDownload mobileDataDownload) { |
| LogUtil.d("%s: Add file group to Mdd.", TAG); |
| |
| // Override data file group if the overrider is present. If the overrider returns an absent |
| // data file group, nothing will be populated. |
| ListenableFuture<Optional<DataFileGroup>> dataFileGroupOptionalFuture = |
| Futures.immediateFuture(Optional.absent()); |
| if (dataFileGroupSupplier.get() != null |
| && !dataFileGroupSupplier.get().getGroupName().isEmpty()) { |
| dataFileGroupOptionalFuture = |
| overriderOptional.isPresent() |
| ? overriderOptional.get().override(dataFileGroupSupplier.get()) |
| : Futures.immediateFuture(Optional.of(dataFileGroupSupplier.get())); |
| } |
| |
| ListenableFuture<Boolean> addFileGroupFuture = |
| Futures.transformAsync( |
| dataFileGroupOptionalFuture, |
| dataFileGroupOptional -> { |
| if (dataFileGroupOptional.isPresent() |
| && !dataFileGroupOptional.get().getGroupName().isEmpty()) { |
| return mobileDataDownload.addFileGroup( |
| AddFileGroupRequest.newBuilder() |
| .setDataFileGroup(dataFileGroupOptional.get()) |
| .build()); |
| } |
| LogUtil.d("%s: Not adding file group because of overrider.", TAG); |
| return Futures.immediateFuture(false); |
| }, |
| MoreExecutors.directExecutor()); |
| |
| Futures.addCallback( |
| addFileGroupFuture, |
| new FutureCallback<Boolean>() { |
| @Override |
| public void onSuccess(Boolean result) { |
| String groupName = dataFileGroupSupplier.get().getGroupName(); |
| if (result.booleanValue()) { |
| Log.d(TAG, "Added file group " + groupName); |
| } else { |
| Log.e(TAG, "Failed to add file group " + groupName); |
| } |
| } |
| |
| @Override |
| public void onFailure(Throwable t) { |
| Log.e(TAG, "Failed to add file group", t); |
| } |
| }, |
| MoreExecutors.directExecutor()); |
| |
| return Futures.whenAllComplete(addFileGroupFuture) |
| .call(() -> null, MoreExecutors.directExecutor()); |
| } |
| } |