gov.fnal.controls.acnet
Class AcnetWrite

java.lang.Object
  |
  +--gov.fnal.controls.acnet.AcnetWrite

public class AcnetWrite

extends Object

Support for writing to the Acnet socket. Acnet usage is restricted to server engines.

Version:

2.04
Last modified: 13 Nov 1998 /GCJ - modify header if trunk/node changed

Author:

Kevin Cahill

Field Summary

static int	ACNET_BMAX_MESSAGE_SIZE maximum size of big Acnet message, excluding header
static int	ACNET_MAX_MESSAGE_SIZE
protected static boolean	didPassthru flag set true if passthru required
protected static short	pktrNode Packetter trunk and node
protected static short	pktrTrunk Packetter trunk and node
protected static short	vaxNode VAX trunk and node which may be used for passthru
protected static short	vaxTrunk VAX trunk and node which may be used for passthru

Constructor Summary

AcnetWrite()

Method Summary

protected static int	acnetSendPacket(AcnetHeader aHdr) send a status-only Acnet packet.
protected static int	acnetSendPacket(AcnetHeader aHdr, byte[] userData, int userLen, int userOffset) send an Acnet packet.
static short[]	getAcnetTrunkNode(String name) get an Acnet trunk and node with automatic translation to alternate IP trunk and node (if available)
static String	getLocalAcnet() get local trunk/node text string
static int	getTotalPacketsWritten() get the total number of packets written
static boolean	isClassBugs() inquire on the state of the debug message switch.
static String	reportStatistics() Return a statistics report.
static void	setClassBugs(boolean onOff) set the state of the debug message switch.
static void	setJPassNode(String nodeName) set the default vax JPASS node.
static void	setWriteSocket(DatagramSocket s) set the socket to be used for Acnet communications.

Methods inherited from class java.lang.Object

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

Field Detail

ACNET_MAX_MESSAGE_SIZE

public static final int ACNET_MAX_MESSAGE_SIZE

ACNET_BMAX_MESSAGE_SIZE

public static final int ACNET_BMAX_MESSAGE_SIZE

maximum size of big Acnet message, excluding header

pktrTrunk

protected static short pktrTrunk

Packetter trunk and node

pktrNode

protected static short pktrNode

Packetter trunk and node

vaxTrunk

protected static short vaxTrunk

VAX trunk and node which may be used for passthru

vaxNode

protected static short vaxNode

VAX trunk and node which may be used for passthru

didPassthru

protected static boolean didPassthru

flag set true if passthru required

Constructor Detail

AcnetWrite

public AcnetWrite()

Method Detail

setJPassNode

public static void setJPassNode(String nodeName)

set the default vax JPASS node.

Parameters:

nodeName - JPASS node

setClassBugs

public static void setClassBugs(boolean onOff)

set the state of the debug message switch.

Parameters:

onOff - boolean state for the switch

Returns:

true if debug messaging is on, otherwise false.

isClassBugs

public static boolean isClassBugs()

inquire on the state of the debug message switch.

Returns:

true if debug messaging is on, otherwise false.

getTotalPacketsWritten

public static int getTotalPacketsWritten()

get the total number of packets written

Returns:

total number of packets

getAcnetTrunkNode

public static short[] getAcnetTrunkNode(String name)

get an Acnet trunk and node with automatic translation to alternate IP trunk and node (if available)

Parameters:

name - the Acnet node name

Returns:

trunk + node as array: trunk first (-1,-1 if error)

getLocalAcnet

public static String getLocalAcnet()

get local trunk/node text string

Returns:

String describing local node

setWriteSocket

public static void setWriteSocket(DatagramSocket s)

set the socket to be used for Acnet communications.

Parameters:

s - the Datagram socket

acnetSendPacket

protected static int acnetSendPacket(AcnetHeader aHdr)

send a status-only Acnet packet.

Parameters:

aHdr - the Acnet header

Returns:

the status of the send.

acnetSendPacket

protected static int acnetSendPacket(AcnetHeader aHdr,
                                     byte[] userData,
                                     int userLen,
                                     int userOffset)

send an Acnet packet.

Parameters:

aHdr - the Acnet header

userData - the user data

userLength - the length of the user data

userOffset - the offset from the beginning of the user data to send

Returns:

the status of the send.

reportStatistics

public static String reportStatistics()

Return a statistics report.

Returns:

a statistics report