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 org.apache.carbondata.core.util;
  
  import org.apache.hadoop.conf.Configuration;
  
  /**
   * This class maintains ThreadLocal session params
   */
  public class ThreadLocalSessionInfo {
    static final InheritableThreadLocal<CarbonSessionInfo> threadLocal =
        new InheritableThreadLocal<CarbonSessionInfo>();
  
    public static void setCarbonSessionInfo(CarbonSessionInfo carbonSessionInfo) {
      threadLocal.set(carbonSessionInfo);
    }
  
    public static CarbonSessionInfo getCarbonSessionInfo() {
      return threadLocal.get();
    }
  
    public static synchronized CarbonSessionInfo getOrCreateCarbonSessionInfo() {
      CarbonSessionInfo info = threadLocal.get();
      if (info == null || info.getSessionParams() == null) {
        info = new CarbonSessionInfo();
        info.setSessionParams(new SessionParams());
        threadLocal.set(info);
      }
      return info;
    }
  
    public static void setConfigurationToCurrentThread(Configuration configuration) {
      getOrCreateCarbonSessionInfo().getNonSerializableExtraInfo().put("carbonConf", configuration);
    }
  
    public static void unsetAll() {
      threadLocal.remove();
    }
  
    /**
     * use to check whether the thread has the hadoop configuration or not
     */
    public static void shouldHaveCarbonConf() {
      CarbonSessionInfo sessionInfo = getCarbonSessionInfo();
      if (sessionInfo == null) {
        throw new RuntimeException("the thread not contain CarbonSessionInfo");
      }
      Object conf = sessionInfo.getNonSerializableExtraInfo().get("carbonConf");
      if (conf == null) {
        throw new RuntimeException("the thread not contain hadoop configuration");
      }
    }
  }
  