org.jcsp.net2

Class BarrierManager

java.lang.Object

org.jcsp.net2.BarrierManager

final class BarrierManager
extends java.lang.Object

Manages the networked Barriers in the system. This object wraps a Hashtable containing the NetBarrier data objects, and manages the allocation and removal of NetBarrier front ends within the JCSP networking architecture. For information on the NetBarrier, see the appropriate documentation.

See Also:

NetBarrier

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Hashtable	barriers The table containing the Barriers.
private static int	index The index for the next Barrier to be created.
private static BarrierManager	instance Singleton instance of the BarrierManager

Constructor Summary

Constructors

Modifier	Constructor and Description
private	BarrierManager() Private default constructor.

Method Summary

Modifier and Type	Method and Description
(package private) void	create(BarrierData bd) Allocates a new number to the Barrier, and stores it in the table.
(package private) void	create(int idx, BarrierData bd) Stores a barrier with the given index in the table.
(package private) BarrierData	getBarrier(int idx) Retrieves a barrier from the table
(package private) static BarrierManager	getInstance() Allows getting of the singleton instance.
(package private) void	removeBarrier(BarrierData data) Removes the given barrier from the table of barriers.

Methods inherited from class java.lang.Object

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

Field Detail

index

private static int index

The index for the next Barrier to be created. We start at 50 as it allows us to have up to 50 default Barriers with set numbers.

barriers

private final java.util.Hashtable barriers

The table containing the Barriers. An Integer (object wrapped int) is used as the key, and the BarrierData as the value.

instance

private static BarrierManager instance

Singleton instance of the BarrierManager

Constructor Detail

BarrierManager

private BarrierManager()

Private default constructor. Used for the singleton instance.

Method Detail

getInstance

static BarrierManager getInstance()

Allows getting of the singleton instance.

Returns:

The singleton instance of the BarrierManager

create

void create(BarrierData bd)

Allocates a new number to the Barrier, and stores it in the table.

Parameters:

bd - The BarrierData for the Barrier

create

void create(int idx,
            BarrierData bd)
     throws java.lang.IllegalArgumentException

Stores a barrier with the given index in the table.

Parameters:

idx - The index to use for the barrier

bd - The BarrierData representing the barrier

Throws:

java.lang.IllegalArgumentException - If a barrier of the given index already exists.

getBarrier

BarrierData getBarrier(int idx)

Retrieves a barrier from the table

Parameters:

idx - Index in the table to retrieve the barrier from.

Returns:

The BarrierData object for the barrier.

removeBarrier

void removeBarrier(BarrierData data)

Removes the given barrier from the table of barriers.

Parameters:

data - The BarrierData object of the barrier to be removed