org.apache.htrace.core

Class SpanId

java.lang.Object

org.apache.htrace.core.SpanId

All Implemented Interfaces:

Comparable<SpanId>

public final class SpanId
extends Object
implements Comparable<SpanId>

Uniquely identifies an HTrace span. Span IDs are 128 bits in total. The upper 64 bits of a span ID is the same as the upper 64 bits of the parent span, if there is one. The lower 64 bits are always random.

Field Summary

Fields

Modifier and Type	Field and Description
static SpanId	INVALID The invalid span ID, which is all zeroes.

Constructor Summary

Constructors

Constructor and Description
SpanId(long high, long low)

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(SpanId other)
boolean	equals(Object o)
static SpanId	fromRandom()
static SpanId	fromString(String str)
long	getHigh()
long	getLow()
int	hashCode()
boolean	isValid()
SpanId	newChildId()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

INVALID

public static SpanId INVALID

The invalid span ID, which is all zeroes. It is also the "least" span ID in the sense that it is considered smaller than any other span ID.

Constructor Detail

SpanId

public SpanId(long high,
      long low)

Method Detail

fromRandom

public static SpanId fromRandom()

fromString

public static SpanId fromString(String str)

getHigh

public long getHigh()

getLow

public long getLow()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

compareTo

public int compareTo(SpanId other)

Specified by:

compareTo in interface Comparable<SpanId>

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

isValid

public boolean isValid()

newChildId

public SpanId newChildId()