com.fr.third.jgroups.util

类 ExtendedUUID

java.lang.Object

com.fr.third.jgroups.util.UUID

com.fr.third.jgroups.util.ExtendedUUID

所有已实现的接口:

Address, Streamable, java.io.Externalizable, java.io.Serializable, java.lang.Comparable<Address>

直接已知子类:

AdditionalDataUUID, CanBeSiteMaster, MachineMarker, PayloadUUID, SiteUUID, TopologyUUID

public class ExtendedUUID
extends UUID

Subclass of UUID accommodating additional data such as a flag and a small hashmap. There may be many instances in memory, and as they are serialized a lot and sent across the wire, I tried to make this as compact as possible. As a consequence, the hashmap can have a max size of 255 and a value can have a max length of 255 bytes.

从以下版本开始:

3.5

作者:

Bela Ban

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static short	can_become_site_master
protected short	flags
protected byte[][]	keys
static short	site_master
protected byte[][]	values

从类继承的字段 com.fr.third.jgroups.util.UUID

cache, leastSigBits, mostSigBits, numberGenerator, print_function, print_uuids, SIZE

从接口继承的字段 com.fr.third.jgroups.Address

IP_ADDR, NULL, SITE_MASTER, SITE_UUID, UUID_ADDR

构造器概要

构造器

限定符	构造器和说明
	ExtendedUUID()
protected	ExtendedUUID(byte[] data)
	ExtendedUUID(ExtendedUUID other)
	ExtendedUUID(long mostSigBits, long leastSigBits)

方法概要

方法

限定符和类型	方法和说明
ExtendedUUID	addContents(ExtendedUUID other)
ExtendedUUID	clearFlag(short flag)
protected java.lang.String	flagsToString()
byte[]	get(byte[] key)
byte[]	get(java.lang.String key)
boolean	isFlagSet(short flag)
boolean	keyExists(byte[] key)
boolean	keyExists(java.lang.String key)
int	length() The number of non-null keys
java.lang.String	print()
ExtendedUUID	put(byte[] key, byte[] val)
protected ExtendedUUID	put(int start_index, byte[] key, byte[] val)
ExtendedUUID	put(java.lang.String key, byte[] val)
static ExtendedUUID	randomUUID()
static ExtendedUUID	randomUUID(java.lang.String name)
protected void	read(java.io.DataInput in)
void	readExternal(java.io.ObjectInput in)
void	readFrom(java.io.DataInput in) Read the state of the current object (including superclasses) from instream Note that the input stream must not be closed
byte[]	remove(byte[] key)
byte[]	remove(java.lang.String key)
protected void	resize(int new_length)
ExtendedUUID	setFlag(short flag)
int	size() The number of bytes required to serialize this instance
protected int	sizeofHashMap()
java.lang.String	toString()
protected void	write(java.io.DataOutput out)
void	writeExternal(java.io.ObjectOutput out)
void	writeTo(java.io.DataOutput out) Write the entire state of the current object (including superclasses) to outstream.

从类继承的方法 com.fr.third.jgroups.util.UUID

add, add, compareTo, copy, digits, equals, fromString, generateRandomBytes, get, getByName, getContents, getLeastSignificantBits, getMostSignificantBits, hashCode, printCache, remove, removeAll, retainAll, toStringLong

从类继承的方法 java.lang.Object

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

字段详细资料

flags

protected short flags

keys

protected byte[][] keys

values

protected byte[][] values

site_master

public static final short site_master

另请参阅:

常量字段值

can_become_site_master

public static final short can_become_site_master

另请参阅:

常量字段值

构造器详细资料

ExtendedUUID

public ExtendedUUID()

ExtendedUUID

protected ExtendedUUID(byte[] data)

ExtendedUUID

public ExtendedUUID(long mostSigBits,
            long leastSigBits)

ExtendedUUID

public ExtendedUUID(ExtendedUUID other)

方法详细资料

randomUUID

public static ExtendedUUID randomUUID()

randomUUID

public static ExtendedUUID randomUUID(java.lang.String name)

setFlag

public ExtendedUUID setFlag(short flag)

clearFlag

public ExtendedUUID clearFlag(short flag)

isFlagSet

public boolean isFlagSet(short flag)

get

public byte[] get(byte[] key)

get

public byte[] get(java.lang.String key)

put

public ExtendedUUID put(byte[] key,
               byte[] val)

put

protected ExtendedUUID put(int start_index,
               byte[] key,
               byte[] val)

put

public ExtendedUUID put(java.lang.String key,
               byte[] val)

remove

public byte[] remove(byte[] key)

remove

public byte[] remove(java.lang.String key)

keyExists

public boolean keyExists(byte[] key)

keyExists

public boolean keyExists(java.lang.String key)

addContents

public ExtendedUUID addContents(ExtendedUUID other)

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

指定者:

writeExternal 在接口中 java.io.Externalizable

覆盖:

writeExternal 在类中 UUID

抛出:

java.io.IOException

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

指定者:

readExternal 在接口中 java.io.Externalizable

覆盖:

readExternal 在类中 UUID

抛出:

java.io.IOException

java.lang.ClassNotFoundException

writeTo

public void writeTo(java.io.DataOutput out)
             throws java.lang.Exception

从接口复制的说明: Streamable

Write the entire state of the current object (including superclasses) to outstream. Note that the output stream must not be closed

指定者:

writeTo 在接口中 Streamable

覆盖:

writeTo 在类中 UUID

抛出:

java.lang.Exception

readFrom

public void readFrom(java.io.DataInput in)
              throws java.lang.Exception

从接口复制的说明: Streamable

Read the state of the current object (including superclasses) from instream Note that the input stream must not be closed

指定者:

readFrom 在接口中 Streamable

覆盖:

readFrom 在类中 UUID

抛出:

java.lang.Exception

size

public int size()

The number of bytes required to serialize this instance

指定者:

size 在接口中 Address

覆盖:

size 在类中 UUID

length

public int length()

The number of non-null keys

toString

public java.lang.String toString()

覆盖:

toString 在类中 UUID

print

public java.lang.String print()

write

protected void write(java.io.DataOutput out)
              throws java.io.IOException

抛出:

java.io.IOException

read

protected void read(java.io.DataInput in)
             throws java.io.IOException

抛出:

java.io.IOException

sizeofHashMap

protected int sizeofHashMap()

resize

protected void resize(int new_length)

flagsToString

protected java.lang.String flagsToString()