content: package com.alibaba.datax.plugin.reader.otsreader.utils;
  
  public class Constant {
      /**
       * Json中的Key名字定义
       */
  public class ConfigKey {
          public static final String CONF = "conf";
          public static final String RANGE = "range";
          public static final String META = "meta";
          public static final String SPLIT_INFO = "splitInfo";
  
          public static final String TIME_RANGE = "timeRange";
          public static final String MAX_VERSION = "maxVersion";
          
          public static final String RETRY = "maxRetryTime";
          public static final String RETRY_PAUSE_IN_MILLISECOND = "retryPauseInMillisecond";
          public static final String IO_THREAD_COUNT = "ioThreadCount";
          public static final String MAX_CONNECTION_COUNT = "maxConnectionCount";
          public static final String SOCKET_TIMEOUTIN_MILLISECOND = "socketTimeoutInMillisecond";
          public static final String CONNECT_TIMEOUT_IN_MILLISECOND = "connectTimeoutInMillisecond";
  
          public class Range {
              public static final String BEGIN = "begin";
              public static final String END = "end";
              public static final String SPLIT = "split";
          };
  
          public class PrimaryKeyColumn {
              public static final String TYPE = "type";
              public static final String VALUE = "value";
          };
  
          public class TimeseriesPKColumn {
              public static final String MEASUREMENT_NAME = "_m_name";
              public static final String DATA_SOURCE = "_data_source";
              public static final String TAGS = "_tags";
              public static final String TIME = "_time";
          }
          
          public class Column {
              public static final String NAME = "name";
              public static final String TYPE = "type";
              public static final String VALUE = "value";
              public static final String IS_TAG = "is_timeseries_tag";
          };
          
          public class TimeRange {
              public static final String BEGIN = "begin";
              public static final String END = "end";
          }
      };
      
      /**
       * 定义的配置文件中value type中可取的值
       */
      public class ValueType {
          public static final String INF_MIN = "INF_MIN";
          public static final String INF_MAX = "INF_MAX";
          public static final String STRING = "string";
          public static final String INTEGER = "int";
          public static final String BINARY = "binary";
          public static final String DOUBLE = "double";
          public static final String BOOLEAN = "bool";
      };
      
      /**
       * 全局默认常量定义
       */
      public class ConfigDefaultValue {
          public static final int RETRY = 18;
          public static final int RETRY_PAUSE_IN_MILLISECOND = 100;
          public static final int IO_THREAD_COUNT = 1;
          public static final int MAX_CONNECTION_COUNT = 1;
          public static final int SOCKET_TIMEOUT_IN_MILLISECOND = 10000;
          public static final int CONNECT_TIMEOUT_IN_MILLISECOND = 10000;
          
          public static final int MAX_VERSION = Integer.MAX_VALUE;
  
          public static final String DEFAULT_NAME = "DEFAULT_NAME";
          
          public class Mode {
              public static final String NORMAL = "normal";
              public static final String MULTI_VERSION = "multiVersion";
          }
          
          public class TimeRange {
              public static final long MIN = 0;
              public static final long MAX = Long.MAX_VALUE;
          }
      }
  }
  