Package org.jgroups.protocols.pbcast

Class NakAckHeader

java.lang.Object

org.jgroups.Header

org.jgroups.protocols.pbcast.NakAckHeader

All Implemented Interfaces:

Externalizable, Serializable, Streamable

public class NakAckHeader
extends Header
implements Streamable

Version:

$Id: NakAckHeader.java,v 1.21 2007/08/20 10:46:53 belaban Exp $

Author:

Bela Ban

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final byte	MSG
static final byte	XMIT_REQ
static final byte	XMIT_RSP

Fields inherited from class org.jgroups.Header

HDR_OVERHEAD

Constructor Summary

Constructors

Constructor	Description
NakAckHeader()
NakAckHeader(byte type, long seqno)	Constructor for regular messages
NakAckHeader(byte type, long low, long high)	Constructor for retransmit requests/responses (low and high define the range of msgs)
NakAckHeader(byte type, long low, long high, Address sender)

Method Summary

Modifier and Type	Method	Description
NakAckHeader	copy()
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
int	size()	To be implemented by subclasses.
String	toString()
static String	type2Str(byte t)
void	writeExternal(ObjectOutput out)
void	writeTo(DataOutputStream out)	Write the entire state of the current object (including superclasses) to outstream.

Methods inherited from class java.lang.Object

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

Field Details

MSG

public static final byte MSG

See Also:

• Constant Field Values

XMIT_REQ

public static final byte XMIT_REQ

See Also:

• Constant Field Values

XMIT_RSP

public static final byte XMIT_RSP

See Also:

• Constant Field Values

Constructor Details

NakAckHeader

public NakAckHeader()

NakAckHeader

public NakAckHeader(byte type,
 long seqno)

Constructor for regular messages

NakAckHeader

public NakAckHeader(byte type,
 long low,
 long high)

Constructor for retransmit requests/responses (low and high define the range of msgs)

NakAckHeader

public NakAckHeader(byte type,
 long low,
 long high,
 Address sender)

Method Details

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

writeTo

public void writeTo(DataOutputStream out)
             throws IOException

Description copied from interface: Streamable

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

Throws:

IOException

readFrom

public void readFrom(DataInputStream in)
              throws IOException,
IllegalAccessException,
InstantiationException

Description copied from interface: Streamable

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

Throws:

IOException

IllegalAccessException

InstantiationException

size

public int size()

Description copied from class: Header

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 class Header

copy

public NakAckHeader copy()

type2Str

public static String type2Str(byte t)

toString

public String toString()

Overrides:

toString in class Header