com.hazelcast.nio

Class Packet

java.lang.Object

com.hazelcast.nio.serialization.DataAdapter

com.hazelcast.nio.Packet

All Implemented Interfaces:

SocketReadable, SocketWritable

public final class Packet
extends DataAdapter
implements SocketWritable, SocketReadable

A Packet is a piece of data send over the line.

Field Summary

Fields

Modifier and Type	Field and Description
static int	HEADER_BIND
static int	HEADER_EVENT
static int	HEADER_OP
static int	HEADER_RESPONSE
static int	HEADER_URGENT
static int	HEADER_WAN_REPLICATION
static byte	VERSION

Fields inherited from class com.hazelcast.nio.serialization.DataAdapter

context, data

Constructor Summary

Constructors

Constructor and Description
Packet(Data value, int partitionId, PortableContext context)
Packet(Data value, PortableContext context)
Packet(PortableContext context)

Method Summary

Methods

Modifier and Type	Method and Description
Connection	getConn() Gets the Connection this Packet was send with.
short	getHeader() Returns the header of the Packet.
int	getPartitionId() Returns the partition id of this packet.
boolean	isHeaderSet(int bit)
boolean	isUrgent() Checks if this SocketWritable is urgent.
boolean	readFrom(ByteBuffer source)
void	setConn(Connection conn) Sets the Connection this Packet is send with.
void	setHeader(int bit)
int	size() Returns an estimation of the packet, including its payload, in bytes.
String	toString()
boolean	writeTo(ByteBuffer destination) Asks the SocketWritable to write its content to the destination ByteBuffer.

Methods inherited from class com.hazelcast.nio.serialization.DataAdapter

done, getData, getDataSize, isStatusSet, reset, setData, setStatus

Methods inherited from class java.lang.Object

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

Field Detail

VERSION

public static final byte VERSION

See Also:

Constant Field Values

HEADER_OP

public static final int HEADER_OP

See Also:

Constant Field Values

HEADER_RESPONSE

public static final int HEADER_RESPONSE

See Also:

Constant Field Values

HEADER_EVENT

public static final int HEADER_EVENT

See Also:

Constant Field Values

HEADER_WAN_REPLICATION

public static final int HEADER_WAN_REPLICATION

See Also:

Constant Field Values

HEADER_URGENT

public static final int HEADER_URGENT

See Also:

Constant Field Values

HEADER_BIND

public static final int HEADER_BIND

See Also:

Constant Field Values

Constructor Detail

Packet

public Packet(PortableContext context)

Packet

public Packet(Data value,
      PortableContext context)

Packet

public Packet(Data value,
      int partitionId,
      PortableContext context)

Method Detail

getConn

public Connection getConn()

Gets the Connection this Packet was send with.

Returns:

the Connection. Could be null.

setConn

public void setConn(Connection conn)

Sets the Connection this Packet is send with.

This is done on the reading side of the Packet to make it possible to retrieve information about the sender of the Packet.

Parameters:

conn - the connection.

setHeader

public void setHeader(int bit)

isHeaderSet

public boolean isHeaderSet(int bit)

getHeader

public short getHeader()

Returns the header of the Packet. The header is used to figure out what the content is of this Packet before the actual payload needs to be processed.

Returns:

the header.

getPartitionId

public int getPartitionId()

Returns the partition id of this packet. If this packet is not for a particular partition, -1 is returned.

Returns:

the partition id.

isUrgent

public boolean isUrgent()

Description copied from interface: SocketWritable

Checks if this SocketWritable is urgent. SocketWritable that are urgent, have priority above regular SocketWritable. This is useful to implement System Operations so that they can be send faster than regular operations; especially when the system is under load you want these operations have precedence.

Specified by:

isUrgent in interface SocketWritable

Overrides:

isUrgent in class DataAdapter

Returns:

true if urgent, false otherwise.

writeTo

public boolean writeTo(ByteBuffer destination)

Description copied from interface: SocketWritable

Asks the SocketWritable to write its content to the destination ByteBuffer.

Specified by:

writeTo in interface SocketWritable

Overrides:

writeTo in class DataAdapter

Parameters:

destination - the ByteBuffer to write to.

Returns:

todo: unclear what return value means.

readFrom

public boolean readFrom(ByteBuffer source)

Specified by:

readFrom in interface SocketReadable

Overrides:

readFrom in class DataAdapter

size

public int size()

Returns an estimation of the packet, including its payload, in bytes.

Returns:

the size of the packet.

toString

public String toString()

Overrides:

toString in class Object