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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.core.blackboard

Source Cross Reference

Class Diagram

Java Document (Java Doc)

org.cougaar.core.blackboard .Claimable

All known Subclasses:   org.cougaar.core.blackboard .ClaimableImpl,
Claimable
public interface Claimable (Code)
An object "claimed" by a single actor, typically a plugin instance.
For example, a Claimable object would likely be "claimed" by a plugin when that plugin creates the object or the object is added into the blackboard.
Claiming of objects is done by the infrastruture *only* - plugins should *never* call claim().

Method Summary
Object getClaim()
     the current claim holder, or null if there is none.
boolean isClaimed()
     true IFF this object been claimed.
void resetClaim(Object oldClaimHolder)
     Release a Claim on the object.
void setClaim(Object putativeClaimHolder)
     Stake a Claim on the object.
boolean tryClaim(Object putativeClaimHolder)
     Try to stake a Claim on the object.

Method Detail
getClaim
Object getClaim()(Code)
the current claim holder, or null if there is none.

isClaimed
boolean isClaimed()(Code)
true IFF this object been claimed.

resetClaim
void resetClaim(Object oldClaimHolder)(Code)
Release a Claim on the object.
exception:
  IllegalArgumentExcpeiton - If the object is notcurrently claimed, or is claimed by someone else.

setClaim
void setClaim(Object putativeClaimHolder)(Code)
Stake a Claim on the object.
exception:
  IllegalArgumentException - If there is already a Claimon the object which is not == the putativeClaimHolder.

tryClaim
boolean tryClaim(Object putativeClaimHolder)(Code)
Try to stake a Claim on the object. true IFF success.

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