org.jgroups.protocols

Class FD_SOCK.FdHeader

Enclosing Class:
FD_SOCK
Implemented Interfaces:
Externalizable, Streamable

public static class FD_SOCK.FdHeader
extends Header
implements Streamable

Field Summary

static byte
GET_CACHE
static byte
GET_CACHE_RSP
static byte
I_HAVE_SOCK
static byte
SUSPECT
static byte
WHO_HAS_SOCK

Fields inherited from class org.jgroups.Header

HDR_OVERHEAD

Constructor Summary

FdHeader()
FdHeader(byte type)
FdHeader(byte type, Hashtable cachedAddrs)
FdHeader(byte type, Vector mbrs)
FdHeader(byte type, Address mbr)

Method Summary

void
readExternal(ObjectInput in)
void
readFrom(DataInputStream in)
Read the state of the current object (including superclasses) from instream Note that the input stream must not be closed
long
size()
To be implemented by subclasses.
String
toString()
static String
type2String(byte type)
void
writeExternal(ObjectOutput out)
void
writeTo(DataOutputStream out)
Write the entire state of the current object (including superclasses) to outstream.

Methods inherited from class org.jgroups.Header

size, toString

Field Details

GET_CACHE

public static final byte GET_CACHE
Field Value:
13

GET_CACHE_RSP

public static final byte GET_CACHE_RSP
Field Value:
14

I_HAVE_SOCK

public static final byte I_HAVE_SOCK
Field Value:
12

SUSPECT

public static final byte SUSPECT
Field Value:
10

WHO_HAS_SOCK

public static final byte WHO_HAS_SOCK
Field Value:
11

Constructor Details

FdHeader

public FdHeader()

FdHeader

public FdHeader(byte type)

FdHeader

public FdHeader(byte type,
                Hashtable cachedAddrs)

FdHeader

public FdHeader(byte type,
                Vector mbrs)

FdHeader

public FdHeader(byte type,
                Address mbr)

Method Details

readExternal

public void readExternal(ObjectInput in)
            throws IOException,
                   ClassNotFoundException

readFrom

public void readFrom(DataInputStream in)
            throws IOException,
                   IllegalAccessException,
                   InstantiationException
Read the state of the current object (including superclasses) from instream Note that the input stream must not be closed
Specified by:
readFrom in interface Streamable

size

public long size()
To be implemented by subclasses. Return the size of this object for the serialized version of it. I.e. how many bytes this object takes when flattened into a buffer. This may be different for each instance, or can be the same. This may also just be an estimation. E.g. FRAG uses it on Message to determine whether or not to fragment the message. Fragmentation itself will be accurate, because the entire message will actually be serialized into a byte buffer, so we can determine the exact size.
Overrides:
size in interface Header

toString

public String toString()
Overrides:
toString in interface Header

type2String

public static String type2String(byte type)

writeExternal

public void writeExternal(ObjectOutput out)
            throws IOException

writeTo

public void writeTo(DataOutputStream out)
            throws IOException
Write the entire state of the current object (including superclasses) to outstream. Note that the output stream must not be closed
Specified by:
writeTo in interface Streamable

Copyright B) 1998-2005 Bela Ban. All Rights Reserved.