content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.alibaba.jstorm.daemon.nimbus;
  
  import backtype.storm.utils.Utils;
  import com.alibaba.jstorm.cache.JStormCache;
  import com.alibaba.jstorm.cache.RocksDBCache;
  import com.alibaba.jstorm.cache.TimeoutMemCache;
  import com.alibaba.jstorm.client.ConfigExtension;
  import com.alibaba.jstorm.cluster.StormClusterState;
  import com.alibaba.jstorm.cluster.StormConfig;
  import com.alibaba.jstorm.utils.OSInfo;
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Map;
  
  /**
   * In the old design, DBCache will cache all taskInfo/taskErrors, this will be useful for huge topology
   * But the latest zk design, taskInfo is only one znode, taskErros has few znode
   * So remove them from DBCache Skip timely refresh taskInfo/taskErrors
   */
  public class NimbusCache {
      private static final Logger LOG = LoggerFactory.getLogger(NimbusCache.class);
  
      public static final String TIMEOUT_MEM_CACHE_CLASS = TimeoutMemCache.class.getName();
      public static final String ROCKS_DB_CACHE_CLASS = RocksDBCache.class.getName();
  
      protected JStormCache memCache;
      protected JStormCache dbCache;
      protected StormClusterState zkCluster;
  
      public String getNimbusCacheClass(Map conf) {
          boolean isLinux = OSInfo.isLinux();
          boolean isMac = OSInfo.isMac();
          boolean isLocal = StormConfig.local_mode(conf);
  
          if (isLocal) {
              return TIMEOUT_MEM_CACHE_CLASS;
          }
  
          if (!isLinux && !isMac) {
              return TIMEOUT_MEM_CACHE_CLASS;
          }
  
          String nimbusCacheClass = ConfigExtension.getNimbusCacheClass(conf);
          if (!StringUtils.isBlank(nimbusCacheClass)) {
              return nimbusCacheClass;
          }
  
          return ROCKS_DB_CACHE_CLASS;
      }
  
      public NimbusCache(Map conf, StormClusterState zkCluster) {
          super();
  
          String dbCacheClass = getNimbusCacheClass(conf);
          LOG.info("NimbusCache db cache will use {}", dbCacheClass);
  
          try {
              dbCache = (JStormCache) Utils.newInstance(dbCacheClass);
  
              String dbDir = StormConfig.masterDbDir(conf);
              conf.put(RocksDBCache.ROCKSDB_ROOT_DIR, dbDir);
              conf.put(RocksDBCache.ROCKSDB_RESET, ConfigExtension.getNimbusCacheReset(conf));
  
              dbCache.init(conf);
              if (dbCache instanceof TimeoutMemCache) {
                  memCache = dbCache;
              } else {
                  memCache = new TimeoutMemCache();
                  memCache.init(conf);
              }
          } catch (java.lang.UnsupportedClassVersionError e) {
              if (e.getMessage().contains("Unsupported major.minor version")) {
                  LOG.error("!!!Please update jdk version to 7 or higher!!!");
              }
              LOG.error("Failed to create NimbusCache!", e);
              throw new RuntimeException(e);
          } catch (Exception e) {
              LOG.error("Failed to create NimbusCache!", e);
              throw new RuntimeException(e);
          }
  
          this.zkCluster = zkCluster;
      }
  
      public JStormCache getMemCache() {
          return memCache;
      }
  
      public JStormCache getDbCache() {
          return dbCache;
      }
  
      public void cleanup() {
          dbCache.cleanup();
  
      }
  }
  