1 /* 2 * Copyright 2022 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.google.android.libraries.mobiledatadownload.populator; 17 18 import com.google.common.base.Optional; 19 import com.google.common.util.concurrent.ListenableFuture; 20 import com.google.mobiledatadownload.populator.MetadataProto.ManifestFileBookkeeping; 21 22 /** Storage mechanism for ManifestFileBookkeeping. */ 23 interface ManifestFileMetadataStore { 24 /** Returns the metadata associated with {@code manifestId} if it exists. */ read(String manifestId)25 ListenableFuture<Optional<ManifestFileBookkeeping>> read(String manifestId); 26 27 /** Inserts or updates the metadata associated with {@code manifestId}. */ upsert(String manifestId, ManifestFileBookkeeping value)28 ListenableFuture<Void> upsert(String manifestId, ManifestFileBookkeeping value); 29 } 30