Java tutorial
/** * This file is part of mycollab-config. * * mycollab-config is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * mycollab-config is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with mycollab-config. If not, see <http://www.gnu.org/licenses/>. */ package com.esofthead.mycollab.configuration; import org.apache.commons.lang3.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.esofthead.mycollab.core.MyCollabException; /** * * @author MyCollab Ltd. * @since 4.5.1 * */ public class StorageManager { private static final Logger LOG = LoggerFactory.getLogger(StorageManager.class); private static final String S3_CONF_CLS = "com.esofthead.mycollab.ondemand.configuration.S3StorageConfiguration"; private static StorageManager instance = new StorageManager(); private StorageConfiguration storageConf; private String storageSystem; private StorageManager() { } @SuppressWarnings("unchecked") static void loadStorageConfig() { // Load storage configuration String storageSystem = ApplicationProperties.getString(ApplicationProperties.STORAGE_SYSTEM, StorageConfiguration.FILE_STORAGE_SYSTEM); instance.storageSystem = storageSystem; if (StorageConfiguration.FILE_STORAGE_SYSTEM.equals(storageSystem)) { LOG.debug("MyCollab uses file storage system"); instance.storageConf = new FileStorageConfiguration(); } else if (StorageConfiguration.S3_STORAGE_SYSTEM.equals(storageSystem)) { LOG.debug("MyCollab uses amazon s3 system"); try { Class<StorageConfiguration> s3Conf = (Class<StorageConfiguration>) Class.forName(S3_CONF_CLS); StorageConfiguration newInstance = s3Conf.newInstance(); instance.storageConf = newInstance; } catch (Exception e) { LOG.error("Can not load s3 file system with class " + S3_CONF_CLS, e); System.exit(-1); } } else { throw new MyCollabException("Can not load storage " + storageSystem); } } public static String getAvatarLink(String userAvatarId, int size) { if (StringUtils.isBlank(userAvatarId)) { return MyCollabAssets.newResourceLink("icons/default_user_avatar_" + size + ".png"); } else { return instance.storageConf.getAvatarPath(userAvatarId, size); } } public static StorageConfiguration getConfiguration() { return instance.storageConf; } public static boolean isFileStorage() { return StorageConfiguration.FILE_STORAGE_SYSTEM.equals(instance.storageSystem); } public static boolean isS3Storage() { return StorageConfiguration.S3_STORAGE_SYSTEM.equals(instance.storageSystem); } }