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com.tangosol.util
Class SegmentedConcurrentMap.LockAction

java.lang.Object
com.tangosol.util.SegmentedConcurrentMap.LockAction

All Implemented Interfaces:

SegmentedHashMap.EntryAction

Enclosing class:

SegmentedConcurrentMap

protected class SegmentedConcurrentMap.LockAction

extends java.lang.Object

implements SegmentedHashMap.EntryAction

Action support for lock(). This action attempts to lock the specified key in this map, and is expected to run while holding the segment-lock for the specified key.

The context object for a LockAction is the prospective lock-holder.

The result of invoking a LockAction is NO_VALUE if the key is successfully locked, or the Entry object corresponding to the specified key if the key could not be successfully locked.

Constructor Summary

protected

SegmentedConcurrentMap.LockAction()

Method Summary

java.lang.Object	invokeFound(java.lang.Object oKey, java.lang.Object oContext, SegmentedHashMap.Entry[] aeBucket, int nBucket, SegmentedHashMap.Entry entryPrev, SegmentedHashMap.Entry entryCur) Invoke some action, holding the segment lock, when a matching Entry is found.
java.lang.Object	invokeNotFound(java.lang.Object oKey, java.lang.Object oContext, SegmentedHashMap.Entry[] aeBucket, int nBucket) Invoke some action, holding the segment lock, when no matching Entry is found.

Constructor Detail

SegmentedConcurrentMap.LockAction

protected SegmentedConcurrentMap.LockAction()

Method Detail

invokeFound

public java.lang.Object invokeFound(java.lang.Object oKey,
                                    java.lang.Object oContext,
                                    SegmentedHashMap.Entry[] aeBucket,
                                    int nBucket,
                                    SegmentedHashMap.Entry entryPrev,
                                    SegmentedHashMap.Entry entryCur)

Invoke some action, holding the segment lock, when a matching Entry is found.

Specified by:

invokeFound in interface SegmentedHashMap.EntryAction

Parameters:

oKey - the key to which the action is applied

oContext - opaque context specific to the action

aeBucket - the bucket array

nBucket - the index into the bucket array

entryPrev - the Entry object immediately preceding the Entry that was found, or null

entryCur - the Entry object that was found

Returns:

an opaque result value

invokeNotFound

public java.lang.Object invokeNotFound(java.lang.Object oKey,
                                       java.lang.Object oContext,
                                       SegmentedHashMap.Entry[] aeBucket,
                                       int nBucket)

Invoke some action, holding the segment lock, when no matching Entry is found.

Specified by:

invokeNotFound in interface SegmentedHashMap.EntryAction

Parameters:

oKey - the key to which the action is applied

oContext - opaque context specific to the action

aeBucket - the bucket array

nBucket - the index into the bucket array

Returns:

an opaque result value

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