Package org.jgroups.protocols

Class PingHeader

java.lang.Object

org.jgroups.Header

org.jgroups.protocols.PingHeader

All Implemented Interfaces:

Streamable

public class PingHeader
extends Header

Author:

Bela Ban

Field Summary

Fields

Modifier and Type	Field	Description
PingData	arg
String	cluster_name
static final byte	GET_MBRS_REQ
static final byte	GET_MBRS_RSP
boolean	return_view_only
byte	type

Constructor Summary

Constructors

Constructor	Description
PingHeader()
PingHeader(byte type, String cluster_name)
PingHeader(byte type, PingData arg)
PingHeader(byte type, PingData arg, String cluster_name)

Method Summary

Modifier and Type	Method	Description
void	readFrom(DataInputStream instream)	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()
void	writeTo(DataOutputStream outstream)	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

GET_MBRS_REQ

public static final byte GET_MBRS_REQ

See Also:

• Constant Field Values

GET_MBRS_RSP

public static final byte GET_MBRS_RSP

See Also:

• Constant Field Values

type

public byte type

arg

public PingData arg

cluster_name

public String cluster_name

return_view_only

public boolean return_view_only

Constructor Details

PingHeader

public PingHeader()

PingHeader

public PingHeader(byte type,
 String cluster_name)

PingHeader

public PingHeader(byte type,
 PingData arg)

PingHeader

public PingHeader(byte type,
 PingData arg,
 String cluster_name)

Method Details

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.

Specified by:

size in class Header

toString

public String toString()

Overrides:

toString in class Header

writeTo

public void writeTo(DataOutputStream outstream)
             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

Throws:

IOException

readFrom

public void readFrom(DataInputStream instream)
              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

Throws:

IOException

IllegalAccessException

InstantiationException