net.opentsdb.core

Class Const

java.lang.Object

net.opentsdb.core.Const

public final class Const
extends Object

Constants used in various places.

Field Summary

Fields

Modifier and Type	Field and Description
static short	FLAG_BITS Number of LSBs in time_deltas reserved for flags.
static short	FLAG_FLOAT When this bit is set, the value is a floating point value.
static short	FLAGS_MASK Mask to select all the FLAG_BITS.
static byte[]	HEX Array containing the hexadecimal characters (0 to 9, A to F).
static short	LENGTH_MASK Mask to select the size of a value from the qualifier.
static long	MAX_INT_IN_DOUBLE Necessary for rate calculations where we may be trying to convert a large Long value to a double.
static short	MAX_NUM_TAGS Maximum number of tags allowed per data point.
static short	MAX_TIMESPAN Max time delta (in seconds) we can store in a column qualifier.
static long	MILLISECOND_MASK Mask to verify a timestamp on 6 bytes in milliseconds
static byte	MS_BYTE_FLAG Mask for the millisecond qualifier flag
static int	MS_FLAG Flag to set on millisecond qualifier timestamps
static short	MS_FLAG_BITS Number of LSBs in time_deltas reserved for flags.
static byte	MS_MIXED_COMPACT Flag to determine if a compacted column is a mix of seconds and ms
static long	SECOND_MASK Mask to verify a timestamp on 4 bytes in seconds
static short	TIMESTAMP_BYTES Number of bytes on which a timestamp is encoded.

Constructor Summary

Constructors

Constructor and Description
Const()

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TIMESTAMP_BYTES

public static final short TIMESTAMP_BYTES

Number of bytes on which a timestamp is encoded.

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Constant Field Values

MAX_NUM_TAGS

public static final short MAX_NUM_TAGS

Maximum number of tags allowed per data point.

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Constant Field Values

FLAG_BITS

public static final short FLAG_BITS

Number of LSBs in time_deltas reserved for flags.

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Constant Field Values

MS_FLAG_BITS

public static final short MS_FLAG_BITS

Number of LSBs in time_deltas reserved for flags.

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Constant Field Values

FLAG_FLOAT

public static final short FLAG_FLOAT

When this bit is set, the value is a floating point value. Otherwise it's an integer value.

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Constant Field Values

LENGTH_MASK

public static final short LENGTH_MASK

Mask to select the size of a value from the qualifier.

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Constant Field Values

MS_BYTE_FLAG

public static final byte MS_BYTE_FLAG

Mask for the millisecond qualifier flag

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Constant Field Values

MS_FLAG

public static final int MS_FLAG

Flag to set on millisecond qualifier timestamps

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Constant Field Values

MS_MIXED_COMPACT

public static final byte MS_MIXED_COMPACT

Flag to determine if a compacted column is a mix of seconds and ms

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Constant Field Values

FLAGS_MASK

public static final short FLAGS_MASK

Mask to select all the FLAG_BITS.

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Constant Field Values

SECOND_MASK

public static final long SECOND_MASK

Mask to verify a timestamp on 4 bytes in seconds

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Constant Field Values

MILLISECOND_MASK

public static final long MILLISECOND_MASK

Mask to verify a timestamp on 6 bytes in milliseconds

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Constant Field Values

MAX_TIMESPAN

public static final short MAX_TIMESPAN

Max time delta (in seconds) we can store in a column qualifier.

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Constant Field Values

HEX

public static final byte[] HEX

Array containing the hexadecimal characters (0 to 9, A to F). This array is read-only, changing its contents leads to an undefined behavior.

MAX_INT_IN_DOUBLE

public static final long MAX_INT_IN_DOUBLE

Necessary for rate calculations where we may be trying to convert a large Long value to a double. Doubles can only take integers up to 2^53 before losing precision.

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Constant Field Values

Constructor Detail

Const

public Const()