Java tutorial
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We also recommend that a * file or class name and description of purpose be included on the * same "printed page" as the copyright notice for easier * identification within third-party archives. * * Copyright 2016 Alibaba Group * * 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.taobao.android.builder.tools.cache; import java.io.File; import java.io.IOException; import com.taobao.android.builder.tools.log.FileLogger; import org.apache.commons.io.FileUtils; /** * Created by wuzhong on 2017/6/8. * * Unified file cache center */ public class FileCacheCenter { public static final boolean BUILD_CACHE_ENABLED = true; private static FileLogger logger = FileLogger.getInstance("filecache"); public static Cache networkCache; public static Cache localCache = new SimpleLocalCache(); /** * Cache files or folders * * @param type * @param key * @param file * @throws FileCacheException */ public static void cacheFile(String type, String key, File file, boolean remote) throws FileCacheException { if (!BUILD_CACHE_ENABLED) { return; } localCache.cacheFile(type, key, file); logger.log(type + "." + key + " cache " + file.getAbsolutePath() + " to local success"); if (null != networkCache && remote) { networkCache.cacheFile(type, key, file); logger.log(type + "." + key + " cache " + file.getAbsolutePath() + " to network success"); } } /** * Query the file, if the local file does not exist, try to read the cache from the cloud * * @param type * @param key * @param folder * @return * @throws FileCacheException */ public static File queryFile(String type, String key, boolean folder, boolean remote) throws FileCacheException { if (!BUILD_CACHE_ENABLED) { return null; } File localCacheFile = localCache.getLocalCacheFile(type, key); if (localCacheFile.exists()) { if (folder != localCacheFile.isDirectory()) { try { FileUtils.forceDelete(localCacheFile); } catch (IOException e) { e.printStackTrace(); } throw new FileCacheException("local dir is folder " + folder); } logger.log(type + "." + key + " query local cache " + localCacheFile.getAbsolutePath() + " success"); return localCacheFile; } else { logger.log(type + "." + key + " miss local cache " + localCacheFile.getAbsolutePath()); } if (null == networkCache || !remote) { return localCacheFile; } try { boolean success = networkCache.fetchFile(type, key, localCacheFile, folder); logger.log(type + "." + key + " fetch remote cache " + localCacheFile.getAbsolutePath() + success); if (success) { return localCacheFile; } } catch (Throwable e) { logger.log( type + "." + key + " fetch remote cache " + localCacheFile.getAbsolutePath() + " exception"); e.printStackTrace(); } logger.log(type + "." + key + " get cache file failed " + localCacheFile.getAbsolutePath()); try { FileUtils.forceDelete(localCacheFile); } catch (IOException e) { e.printStackTrace(); } return localCacheFile; } public static void fetchFile(String type, String key, boolean folder, boolean remote, File dest) throws FileCacheException { if (!BUILD_CACHE_ENABLED) { return; } File cacheFile = queryFile(type, key, folder, remote); if (null != cacheFile && cacheFile.exists()) { try { if (cacheFile.isFile()) { FileUtils.copyFile(cacheFile, dest); } else { FileUtils.copyDirectory(cacheFile, dest); } logger.log(type + "." + key + " fech file success " + dest.getAbsolutePath()); } catch (Throwable e) { throw new FileCacheException(e.getMessage(), e); } } } }