net.vattp.data
Class Msg

java.lang.Object
  |
  +--net.vattp.data.Msg

public class Msg

extends Object

Untamed: Define the allowable message types for the VatTP system. This class only contains static final values. It can not be instantiated.

This class only defines static final values.

Author:

Bill Frantz

Field Summary

static byte	E_MSG Enabled: E level message to an object at the remote end
(package private) static byte	HIGH_MSG_TYPE Highest message type allocated (used to allocate arrays)
(package private) static int	MAX_INBOUND_MSG_LENGTH Maximum length message we will receive.
static int	MAX_OUTBOUND_MSG_LENGTH Enabled: Maximum length message permitted on a connection.
(package private) static byte	PING Ping other end to ensure connection still intact
(package private) static long	PING_SENDTIME The timeout for no messages received.
(package private) static long	PING_TIMEOUT The timeout for a ping.
(package private) static byte	PONG Response to a PING message
(package private) static byte	PROTOCOL_ACCEPTED STARTUP response showing which protocol version to use
(package private) static byte	PROTOCOL_VERSION Supported versions of the E protocol.
(package private) static byte	STARTUP Initial connection setup message
(package private) static byte	SUSPEND Suspend or shutdown this connection.
(package private) static long	TICK_RATE The tick rate for the connection keep alive clock.
private static long	TIME_FUDGE A fudge factor with which to multiply the timeouts for purposes of debugging.
static byte	TUNNEL_MSG Enabled: RMI Comm message to a stream at the other end
(package private) static String[]	Version The protocol versions this implementations supports.

Constructor Summary

private

Msg()

Methods inherited from class java.lang.Object

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

Field Detail

Version

static final String[] Version

The protocol versions this implementations supports.

PROTOCOL_VERSION

static final byte PROTOCOL_VERSION

Supported versions of the E protocol.

STARTUP

static final byte STARTUP

Initial connection setup message

PROTOCOL_ACCEPTED

static final byte PROTOCOL_ACCEPTED

STARTUP response showing which protocol version to use

SUSPEND

static final byte SUSPEND

Suspend or shutdown this connection. A shutdown message has only the message type. A suspend messages also has the suspendID as an encoded string parameter.

PING

static final byte PING

Ping other end to ensure connection still intact

PONG

static final byte PONG

Response to a PING message

E_MSG

public static final byte E_MSG

Enabled: E level message to an object at the remote end

TUNNEL_MSG

public static final byte TUNNEL_MSG

Enabled: RMI Comm message to a stream at the other end

HIGH_MSG_TYPE

static final byte HIGH_MSG_TYPE

Highest message type allocated (used to allocate arrays)

MAX_OUTBOUND_MSG_LENGTH

public static final int MAX_OUTBOUND_MSG_LENGTH

Enabled: Maximum length message permitted on a connection. This limit is enforced by the VatTPConnection object.

MAX_INBOUND_MSG_LENGTH

static final int MAX_INBOUND_MSG_LENGTH

Maximum length message we will receive. This length is set longer than MAX_OUTBOUND_MSG_LENGTH to allow for MAC overhead etc. This limit is enforced by the RecvThread.

TIME_FUDGE

private static final long TIME_FUDGE

A fudge factor with which to multiply the timeouts for purposes of debugging.

TICK_RATE

static final long TICK_RATE

The tick rate for the connection keep alive clock. Used in conjunction with PING_SENDTIME and PING_TIMEOUT to ensure that the connection is still in good working order. In milliseconds.

PING_SENDTIME

static final long PING_SENDTIME

The timeout for no messages received. When this timeout is exceeded, we send a ping message. In milliseconds.

PING_TIMEOUT

static final long PING_TIMEOUT

The timeout for a ping. If we don't receive a message within this time after we have sent a ping, we declare the connection down. In milliseconds.

Constructor Detail

Msg

private Msg()