Package zipkin2

Class Annotation

java.lang.Object

zipkin2.Annotation

All Implemented Interfaces:

Serializable, Comparable<Annotation>

public final class Annotation
extends Object
implements Comparable<Annotation>, Serializable

Associates an event that explains latency with a timestamp.

Unlike log statements, annotations are often codes: Ex. cache.miss.

See Also:

• Serialized Form

Method Summary

Modifier and Type	Method	Description
int	compareTo(Annotation that)	Compares by timestamp, then value.
static Annotation	create(long timestamp, String value)
boolean	equals(Object o)
int	hashCode()
long	timestamp()	Microseconds from epoch.
String	toString()
String	value()	Usually a short tag indicating an event, like cache.miss or error

Methods inherited from class java.lang.Object

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

Method Details

create

public static Annotation create(long timestamp,
 String value)

timestamp

public long timestamp()

Microseconds from epoch.

This value should be set directly by instrumentation, using the most precise value possible. For example, gettimeofday or multiplying System.currentTimeMillis() by 1000.

value

public String value()

Usually a short tag indicating an event, like cache.miss or error

compareTo

public int compareTo(Annotation that)

Compares by timestamp, then value.

Specified by:

compareTo in interface Comparable<Annotation>

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object