uk.ac.ic.doc.automed.p2p
Class Constants

java.lang.Object
  uk.ac.ic.doc.automed.p2p.Constants

public class Constants
extends java.lang.Object

Field Summary

static int	CHANNEL_MULTICAST Send communication messages via multicast
static int	CHANNEL_UNICAST Send communication messages via unicast
static java.lang.String	CLIENT_DEDICATED Dedicated network client
static int	CLIENT_SOCK_TIME_OUT default client time out (in milli-secs), this is especially useful in UDP communication where there is no way of knowing the status of the response (connectionless)
static java.lang.String	CLIENT_SWITCHED Switched network client
static byte[]	FOUND_NWK_HANDLER_FLAG A single-element byte array returned by RequestListener.handleEvent() method when the message that the listener receives is in fact meant for it
static int	KA_STATUS_OFF Keep alive status: -1 means remote is not responding
static int	KA_STATUS_ON Keep alive status: 1 means remote is responding
static java.lang.String	LOOPBACK_ADDRESS The local host address: 127.0.0.1
static int	MAX_SIZE_DIFFERENCE max number of bytes of difference b/w PACKET_SIZE and small data datagrams (used to fine-tune datagram fragmentation)
static java.lang.String	MULTICAST_ALL_DSP_ADDRESS Muticast group address: ALL_DSP (Directory Service Peers)
static int	MULTICAST_ALL_DSP_PORT Muticast group port: ALL_DSP (Directory Service Peers)
static java.lang.String	MULTICAST_HOSTNAME Default multicast hostname which must resolve to the address of the interface used for multicast traffic
static java.lang.String	OPT_HELLO Messaging type: hello protocol
static java.lang.String	OPT_KEEP_ALIVE Messaging type: keep-alive
static java.lang.String	OPT_LOGGING Messaging type: logging
static java.lang.String	OPT_UNREGISTER Messaging type: unregistering client from registry and server
static java.lang.String	OPT_UPDATE_DATA Messaging type: data update with directory server
static int	PACKET_SIZE Send buffer sized for clients
static java.lang.String	PEER_STATUS_ACTIVE Peer active status
static java.lang.String	PEER_STATUS_FLUSH Peer garbage-collect status
static java.lang.String	PEER_STATUS_INACTIVE Peer inactive status
static java.lang.String	PROT_TCP Protocol: TCP
static java.lang.String	PROT_UDP Protocol: UDP
static java.lang.String	PROT_UDP_MULTICAST Protocol: UDP Multicast
static int	RCV_BUFFER_SIZE Received buffer size used for clients
static boolean	SINGLE_HANDLER_PER_EVENT assume that only one hander is registered for a network event
static int	SIZE_THRESHOLD true threshold to differentiate b/w single- and multi-fragment UDP trunks
static int	WAIT_NEXT_RECEIVE Time to wait (in millisecs) for receival of next fragment in the same trunk (used in UDP transmission involved package fragmentation)
static int	WAIT_NEXT_SEND Time to wait (in millisecs) for next send of fragment in the same trunk (used in UDP transmission involved package fragmentation)

Constructor Summary

Constants()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

OPT_KEEP_ALIVE

public static final java.lang.String OPT_KEEP_ALIVE

Messaging type: keep-alive

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Constant Field Values

OPT_UNREGISTER

public static final java.lang.String OPT_UNREGISTER

Messaging type: unregistering client from registry and server

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Constant Field Values

OPT_UPDATE_DATA

public static final java.lang.String OPT_UPDATE_DATA

Messaging type: data update with directory server

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Constant Field Values

OPT_LOGGING

public static final java.lang.String OPT_LOGGING

Messaging type: logging

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Constant Field Values

OPT_HELLO

public static final java.lang.String OPT_HELLO

Messaging type: hello protocol

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Constant Field Values

PROT_TCP

public static final java.lang.String PROT_TCP

Protocol: TCP

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Constant Field Values

PROT_UDP

public static final java.lang.String PROT_UDP

Protocol: UDP

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Constant Field Values

PROT_UDP_MULTICAST

public static final java.lang.String PROT_UDP_MULTICAST

Protocol: UDP Multicast

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Constant Field Values

CLIENT_DEDICATED

public static final java.lang.String CLIENT_DEDICATED

Dedicated network client

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Constant Field Values

CLIENT_SWITCHED

public static final java.lang.String CLIENT_SWITCHED

Switched network client

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Constant Field Values

KA_STATUS_ON

public static final int KA_STATUS_ON

Keep alive status: 1 means remote is responding

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Constant Field Values

KA_STATUS_OFF

public static final int KA_STATUS_OFF

Keep alive status: -1 means remote is not responding

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Constant Field Values

MAX_SIZE_DIFFERENCE

public static final int MAX_SIZE_DIFFERENCE

max number of bytes of difference b/w PACKET_SIZE and small data datagrams (used to fine-tune datagram fragmentation)

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Constant Field Values

RCV_BUFFER_SIZE

public static final int RCV_BUFFER_SIZE

Received buffer size used for clients

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Constant Field Values

PACKET_SIZE

public static final int PACKET_SIZE

Send buffer sized for clients

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Constant Field Values

SIZE_THRESHOLD

public static final int SIZE_THRESHOLD

true threshold to differentiate b/w single- and multi-fragment UDP trunks

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Constant Field Values

CLIENT_SOCK_TIME_OUT

public static final int CLIENT_SOCK_TIME_OUT

default client time out (in milli-secs), this is especially useful in UDP communication where there is no way of knowing the status of the response (connectionless)

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Constant Field Values

WAIT_NEXT_SEND

public static final int WAIT_NEXT_SEND

Time to wait (in millisecs) for next send of fragment in the same trunk (used in UDP transmission involved package fragmentation)

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Constant Field Values

WAIT_NEXT_RECEIVE

public static final int WAIT_NEXT_RECEIVE

Time to wait (in millisecs) for receival of next fragment in the same trunk (used in UDP transmission involved package fragmentation)

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Constant Field Values

MULTICAST_ALL_DSP_ADDRESS

public static final java.lang.String MULTICAST_ALL_DSP_ADDRESS

Muticast group address: ALL_DSP (Directory Service Peers)

Note:
Use this attribute and MULTICAST_HOSTNAME to add a multicast route as follows (e.g. in Linux):
ip route add multicast 226.4.5.6/32 dev lo
OR
ip route add multicast 226.4.5.6/8 dev lo
where: lo (127.0.0.1) is, as resolved by MULTICAST_HOSTNAME, the interface used for multicast traffic.

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Constant Field Values

MULTICAST_ALL_DSP_PORT

public static final int MULTICAST_ALL_DSP_PORT

Muticast group port: ALL_DSP (Directory Service Peers)

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Constant Field Values

MULTICAST_HOSTNAME

public static final java.lang.String MULTICAST_HOSTNAME

Default multicast hostname which must resolve to the address of the interface used for multicast traffic

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Constant Field Values

LOOPBACK_ADDRESS

public static final java.lang.String LOOPBACK_ADDRESS

The local host address: 127.0.0.1

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Constant Field Values

CHANNEL_UNICAST

public static final int CHANNEL_UNICAST

Send communication messages via unicast

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Constant Field Values

CHANNEL_MULTICAST

public static final int CHANNEL_MULTICAST

Send communication messages via multicast

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Constant Field Values

PEER_STATUS_ACTIVE

public static final java.lang.String PEER_STATUS_ACTIVE

Peer active status

PEER_STATUS_INACTIVE

public static final java.lang.String PEER_STATUS_INACTIVE

Peer inactive status

FOUND_NWK_HANDLER_FLAG

public static final byte[] FOUND_NWK_HANDLER_FLAG

A single-element byte array returned by RequestListener.handleEvent() method when the message that the listener receives is in fact meant for it

SINGLE_HANDLER_PER_EVENT

public static final boolean SINGLE_HANDLER_PER_EVENT

assume that only one hander is registered for a network event

See Also:

Constant Field Values

PEER_STATUS_FLUSH

public static final java.lang.String PEER_STATUS_FLUSH

Peer garbage-collect status

Constructor Detail

Constants

public Constants()