org.apache.cassandra.utils
Class NodeId

java.lang.Object
  org.apache.cassandra.utils.NodeId

All Implemented Interfaces:

java.lang.Comparable<NodeId>

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

Nested Class Summary

static class	NodeId.NodeIdRecord
static class	NodeId.OneShotRenewer

Field Summary

static int

LENGTH

Method Summary

java.nio.ByteBuffer	bytes()
int	compareTo(NodeId o)
boolean	equals(java.lang.Object o)
static NodeId	fromInt(int n) Function for test purposes, do not use otherwise.
static NodeId	generate()
static NodeId	getLocalId()
static java.util.List<NodeId.NodeIdRecord>	getOldLocalNodeIds() Return the list of old local node id of this node.
int	hashCode()
boolean	isLocalId()
static void	renewLocalId() Renew the local node id.
java.lang.String	toString()
static NodeId	wrap(java.nio.ByteBuffer id)
static NodeId	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 NodeId getLocalId()

renewLocalId

public static void renewLocalId()

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

getOldLocalNodeIds

public static java.util.List<NodeId.NodeIdRecord> getOldLocalNodeIds()

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

fromInt

public static NodeId fromInt(int n)

Function for test purposes, do not use otherwise. Pack an int in a valid NodeId 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 NodeId wrap(java.nio.ByteBuffer id)

wrap

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

generate

public static NodeId generate()

bytes

public java.nio.ByteBuffer bytes()

isLocalId

public boolean isLocalId()

compareTo

public int compareTo(NodeId o)

Specified by:

compareTo in interface java.lang.Comparable<NodeId>

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