Package org.jgroups.protocols

Class UNICAST.UnicastHeader

java.lang.Object

org.jgroups.Header

org.jgroups.protocols.UNICAST.UnicastHeader

All Implemented Interfaces:

Externalizable, Serializable, Streamable

Enclosing class:

UNICAST

public static class UNICAST.UnicastHeader
extends Header
implements Streamable

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final byte	ACK
static final byte	DATA
static final byte	SEND_FIRST_SEQNO

Fields inherited from class org.jgroups.Header

HDR_OVERHEAD

Constructor Summary

Constructors

Constructor	Description
UnicastHeader()
UnicastHeader(byte type, long seqno)
UnicastHeader(byte type, long seqno, long conn_id)
UnicastHeader(byte type, long seqno, long conn_id, boolean first)

Method Summary

Modifier and Type	Method	Description
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
final 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

DATA

public static final byte DATA

See Also:

• Constant Field Values

ACK

public static final byte ACK

See Also:

• Constant Field Values

SEND_FIRST_SEQNO

public static final byte SEND_FIRST_SEQNO

See Also:

• Constant Field Values

Constructor Details

UnicastHeader

public UnicastHeader()

UnicastHeader

public UnicastHeader(byte type,
 long seqno)

UnicastHeader

public UnicastHeader(byte type,
 long seqno,
 long conn_id)

UnicastHeader

public UnicastHeader(byte type,
 long seqno,
 long conn_id,
 boolean first)

Method Details

toString

public String toString()

Overrides:

toString in class Header

type2Str

public static String type2Str(byte t)

size

public final 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

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