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com.tangosol.util
Class SegmentedConcurrentMap.RemoveAction

java.lang.Object
com.tangosol.util.SegmentedHashMap.EntryActionAdapter
com.tangosol.util.SegmentedHashMap.RemoveAction
com.tangosol.util.SegmentedConcurrentMap.RemoveAction

All Implemented Interfaces:

SegmentedHashMap.EntryAction, SegmentedHashMap.IterableEntryAction

Enclosing class:

SegmentedConcurrentMap

protected class SegmentedConcurrentMap.RemoveAction

extends SegmentedHashMap.RemoveAction

Action support for remove(). The action performs a logical locked remove, and is expected to run while holding the segment-lock for the specified key. If the Entry corresponding to the specified key is still necessary in the map (e.g. for representing a lock state), the Entry may not be physically removed, but rather converted to be synthetic.

The context object for a RemoveAction is unused.

The result of invoking a RemoveAction is the previous value associated with the specified key, or NO_VALUE if no mapping for the key exists in the map. Note that a synthetic Entry does not represent a key-value mapping, so NO_VALUE is returned if a matching synthetic Entry is found.

Constructor Summary

protected

SegmentedConcurrentMap.RemoveAction()

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.

Methods inherited from class com.tangosol.util.SegmentedHashMap.EntryActionAdapter

invokeNotFound, isComplete

Constructor Detail

SegmentedConcurrentMap.RemoveAction

protected SegmentedConcurrentMap.RemoveAction()

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

Overrides:

invokeFound in class SegmentedHashMap.RemoveAction

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

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