org.apache.cassandra.utils

Class CounterId

java.lang.Object

org.apache.cassandra.utils.CounterId

All Implemented Interfaces:

java.lang.Comparable<CounterId>

public class CounterId
extends java.lang.Object
implements java.lang.Comparable<CounterId>

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CounterId.CounterIdRecord
static class	CounterId.OneShotRenewer

Field Summary

Fields

Modifier and Type	Field and Description
static int	LENGTH

Method Summary

Methods

Modifier and Type	Method and Description
java.nio.ByteBuffer	bytes()
int	compareTo(CounterId o)
boolean	equals(java.lang.Object o)
static CounterId	fromInt(int n) Function for test purposes, do not use otherwise.
static CounterId	generate()
static CounterId	getLocalId()
static java.util.List<CounterId.CounterIdRecord>	getOldLocalCounterIds() Return the list of old local counter id of this node.
int	hashCode()
boolean	isLocalId()
static void	renewLocalId() Renew the local counter id.
static void	renewLocalId(long now)
java.lang.String	toString()
static CounterId	wrap(java.nio.ByteBuffer id)
static CounterId	wrap(java.nio.ByteBuffer bb, int offset)

Methods inherited from class java.lang.Object

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

Field Detail

LENGTH

public static final int LENGTH

See Also:

Constant Field Values

Method Detail

getLocalId

public static CounterId getLocalId()

renewLocalId

public static void renewLocalId()

Renew the local counter id. To use only when this strictly necessary, as using this will make all counter context grow with time.

renewLocalId

public static void renewLocalId(long now)

getOldLocalCounterIds

public static java.util.List<CounterId.CounterIdRecord> getOldLocalCounterIds()

Return the list of old local counter id of this node. It is guaranteed that the returned list is sorted by growing counter id (and hence the first item will be the oldest counter id for this host)

fromInt

public static CounterId fromInt(int n)

Function for test purposes, do not use otherwise. Pack an int in a valid CounterId so that the resulting ids respects the numerical ordering. Used for creating handcrafted but easy to understand contexts in unit tests (see CounterContextTest).

wrap

public static CounterId wrap(java.nio.ByteBuffer id)

wrap

public static CounterId wrap(java.nio.ByteBuffer bb,
             int offset)

generate

public static CounterId generate()

bytes

public java.nio.ByteBuffer bytes()

isLocalId

public boolean isLocalId()

compareTo

public int compareTo(CounterId o)

Specified by:

compareTo in interface java.lang.Comparable<CounterId>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object