com.distributed.api
Class Camera

java.lang.Object
  |
  +--com.distributed.api.Camera

public class Camera

extends java.lang.Object

Class used to implement Global Snapshot Algorithm

Field Summary

static boolean	GETVAL Constant used by the entire Class
boolean	globalsnapshotreceived Variable set by users
static boolean	SETVAL Constant used by the entire Class

Constructor Summary

Camera(Environment parent)
Constructor to be normally used by the Environment

Method Summary

protected boolean	accessRED(boolean val, boolean set) Method to get value of RED while setting it if set is true
void	markerReceivedFrom(int pid) Called when the Marker is received from a process
void	saveChannelState(java.lang.String messg, int source) used to save the channel state
void	turnRed(int source, int to) Called when this process should Turn Red

Methods inherited from class java.lang.Object

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

Field Detail

GETVAL

public static final boolean GETVAL

Constant used by the entire Class

See Also:

Constant Field Values

globalsnapshotreceived

public boolean globalsnapshotreceived

Variable set by users

SETVAL

public static final boolean SETVAL

Constant used by the entire Class

See Also:

Constant Field Values

Constructor Detail

Camera

public Camera(Environment parent)

Constructor to be normally used by the Environment

Parameters:

parent - The Parent Environment invoking the Algorithm

Method Detail

accessRED

protected boolean accessRED(boolean val,
                            boolean set)

Method to get value of RED while setting it if set is true

Parameters:

set - Condition to set RED to val

val - New value of RED

Returns:

Value of RED

markerReceivedFrom

public void markerReceivedFrom(int pid)

Called when the Marker is received from a process

Parameters:

pid - Process Id of the source of Marker

saveChannelState

public void saveChannelState(java.lang.String messg,
                             int source)

used to save the channel state

Parameters:

messg - The message to be added to the channel state

source - Process ID of the Source of the Message

turnRed

public void turnRed(int source,
                    int to)

Called when this process should Turn Red

Parameters:

source - The Id of the source process of the Marker

to - The instigator of Algo, to whom the snapshot should be returned