Package org.apache.cassandra.gms

Class VersionedValue

java.lang.Object

org.apache.cassandra.gms.VersionedValue

All Implemented Interfaces:

java.lang.Comparable<VersionedValue>

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

This abstraction represents the state associated with a particular node which an application wants to make available to the rest of the nodes in the cluster. Whenever a piece of state needs to be disseminated to the rest of cluster wrap the state in an instance of ApplicationState and add it to the Gossiper.

e.g. if we want to disseminate load information for node A do the following:

 
 ApplicationState loadState = new ApplicationState(<string representation of load>);
 Gossiper.instance.addApplicationState("LOAD STATE", loadState);
 
 

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	VersionedValue.VersionedValueFactory

Field Summary

Fields

Modifier and Type	Field	Description
static java.util.Set<java.lang.String>	BOOTSTRAPPING_STATUS
static char	DELIMITER
static java.lang.String	DELIMITER_STR
static java.lang.String	HIBERNATE
static java.lang.String	REMOVAL_COORDINATOR
static java.lang.String	REMOVED_TOKEN
static java.lang.String	REMOVING_TOKEN
static IVersionedSerializer<VersionedValue>	serializer
static java.lang.String	SHUTDOWN
static java.lang.String	STATUS_BOOTSTRAPPING
static java.lang.String	STATUS_BOOTSTRAPPING_REPLACE
static java.lang.String	STATUS_LEAVING
static java.lang.String	STATUS_LEFT
static java.lang.String	STATUS_MOVING
static java.lang.String	STATUS_NORMAL
java.lang.String	value
int	version

Method Summary

Modifier and Type	Method	Description
int	compareTo(VersionedValue value)
byte[]	toBytes()
java.lang.String	toString()
static VersionedValue	unsafeMakeVersionedValue(java.lang.String value, int version)

Methods inherited from class java.lang.Object

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

Field Detail

serializer

public static final IVersionedSerializer<VersionedValue> serializer

DELIMITER

public static final char DELIMITER

See Also:

Constant Field Values

DELIMITER_STR

public static final java.lang.String DELIMITER_STR

STATUS_BOOTSTRAPPING

public static final java.lang.String STATUS_BOOTSTRAPPING

See Also:

Constant Field Values

STATUS_BOOTSTRAPPING_REPLACE

public static final java.lang.String STATUS_BOOTSTRAPPING_REPLACE

See Also:

Constant Field Values

STATUS_NORMAL

public static final java.lang.String STATUS_NORMAL

See Also:

Constant Field Values

STATUS_LEAVING

public static final java.lang.String STATUS_LEAVING

See Also:

Constant Field Values

STATUS_LEFT

public static final java.lang.String STATUS_LEFT

See Also:

Constant Field Values

STATUS_MOVING

public static final java.lang.String STATUS_MOVING

See Also:

Constant Field Values

REMOVING_TOKEN

public static final java.lang.String REMOVING_TOKEN

See Also:

Constant Field Values

REMOVED_TOKEN

public static final java.lang.String REMOVED_TOKEN

See Also:

Constant Field Values

HIBERNATE

public static final java.lang.String HIBERNATE

See Also:

Constant Field Values

SHUTDOWN

public static final java.lang.String SHUTDOWN

See Also:

Constant Field Values

REMOVAL_COORDINATOR

public static final java.lang.String REMOVAL_COORDINATOR

See Also:

Constant Field Values

BOOTSTRAPPING_STATUS

public static final java.util.Set<java.lang.String> BOOTSTRAPPING_STATUS

version

public final int version

value

public final java.lang.String value

Method Detail

unsafeMakeVersionedValue

public static VersionedValue unsafeMakeVersionedValue(java.lang.String value,
                                                      int version)

compareTo

public int compareTo(VersionedValue value)

Specified by:

compareTo in interface java.lang.Comparable<VersionedValue>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

toBytes

public byte[] toBytes()