| /* |
| * Copyright 2020 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.server.blob; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.os.Environment; |
| import android.util.Slog; |
| |
| import java.io.File; |
| |
| class BlobStoreConfig { |
| public static final String TAG = "BlobStore"; |
| |
| public static final int CURRENT_XML_VERSION = 1; |
| |
| private static final String ROOT_DIR_NAME = "blobstore"; |
| private static final String BLOBS_DIR_NAME = "blobs"; |
| private static final String SESSIONS_INDEX_FILE_NAME = "sessions_index.xml"; |
| private static final String BLOBS_INDEX_FILE_NAME = "blobs_index.xml"; |
| |
| @Nullable |
| public static File prepareBlobFile(long sessionId) { |
| final File blobsDir = prepareBlobsDir(); |
| return blobsDir == null ? null : getBlobFile(blobsDir, sessionId); |
| } |
| |
| @NonNull |
| public static File getBlobFile(long sessionId) { |
| return getBlobFile(getBlobsDir(), sessionId); |
| } |
| |
| @NonNull |
| private static File getBlobFile(File blobsDir, long sessionId) { |
| return new File(blobsDir, String.valueOf(sessionId)); |
| } |
| |
| @Nullable |
| public static File prepareBlobsDir() { |
| final File blobsDir = getBlobsDir(prepareBlobStoreRootDir()); |
| if (!blobsDir.exists() && !blobsDir.mkdir()) { |
| Slog.e(TAG, "Failed to mkdir(): " + blobsDir); |
| return null; |
| } |
| return blobsDir; |
| } |
| |
| @NonNull |
| public static File getBlobsDir() { |
| return getBlobsDir(getBlobStoreRootDir()); |
| } |
| |
| @NonNull |
| private static File getBlobsDir(File blobsRootDir) { |
| return new File(blobsRootDir, BLOBS_DIR_NAME); |
| } |
| |
| @Nullable |
| public static File prepareSessionIndexFile() { |
| final File blobStoreRootDir = prepareBlobStoreRootDir(); |
| if (blobStoreRootDir == null) { |
| return null; |
| } |
| return new File(blobStoreRootDir, SESSIONS_INDEX_FILE_NAME); |
| } |
| |
| @Nullable |
| public static File prepareBlobsIndexFile() { |
| final File blobsStoreRootDir = prepareBlobStoreRootDir(); |
| if (blobsStoreRootDir == null) { |
| return null; |
| } |
| return new File(blobsStoreRootDir, BLOBS_INDEX_FILE_NAME); |
| } |
| |
| @Nullable |
| public static File prepareBlobStoreRootDir() { |
| final File blobStoreRootDir = getBlobStoreRootDir(); |
| if (!blobStoreRootDir.exists() && !blobStoreRootDir.mkdir()) { |
| Slog.e(TAG, "Failed to mkdir(): " + blobStoreRootDir); |
| return null; |
| } |
| return blobStoreRootDir; |
| } |
| |
| @NonNull |
| public static File getBlobStoreRootDir() { |
| return new File(Environment.getDataSystemDirectory(), ROOT_DIR_NAME); |
| } |
| } |