/**************************
* Author:Bikash Agrawal
* Email: er.bikash21@gmail.com
* Created: 10 May 2013
* Website: www.bikashagrawal.com.np
*
* Description: This class is used to define all the constant used to construct rowkey for timeseries data.
* OpenTSDB has it's own composite rowkey. With 3 bytes Metric ID+ 4 bytes base timestamp + 3 bytes tagkey ID + 3 bytes tagvalue ID +..Tag keys and values keep on appending
* at the end of rowkey. Normally in OpenTSDB there shoudl be at least one tag key and tagvalue.
*/
/** Constants used in various places. */
public final class Const {
/** Number of bytes on which a timestamp is encoded. */
public static final short TIMESTAMP_BYTES = 4;
/** Number of bytes on which a Metrics is encoded. */
public static final short METRICS_BYTES = 3;
/** Maximum number of tags allowed per data point. */
public static final short MAX_NUM_TAGS = 8;
/** Number of LSBs in time_deltas reserved for flags. */
static final short FLAG_BITS = 4;
public static final String DATA_TABLE = "tsdb";
public static final String LOOKUP_TABLE = "tsdb-uid";
//public static String HBASE_CLIENT = "localhost";
/**
* When this bit is set, the value is a floating point value.
* Otherwise it's an integer value.
*/
static final short FLAG_FLOAT = 0x8;
/** Mask to select the size of a value from the qualifier. */
static final short LENGTH_MASK = 0x7;
/** Mask to select all the FLAG_BITS. */
static final short FLAGS_MASK = FLAG_FLOAT | LENGTH_MASK;
/** Max time delta (in seconds) we can store in a column qualifier. */
public static final short MAX_TIMESPAN = 3600;
/**
* Array containing the hexadecimal characters (0 to 9, A to F).
* This array is read-only, changing its contents leads to an undefined
* behavior.
*/
public static final byte[] HEX = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F'
};
}