Interface MapInterceptor
- All Superinterfaces:
Serializable
MapInterceptors are chained when added to the map, which means that when an interceptor is added on node initialization, it could be added twice. To prevent this, make sure to implement the hashCode method to return the same value for every instance of the class.
Serialized instances of this interface are used in client-member communication, so changing an implementation's binary format will render it incompatible with its previous versions.
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Method Summary
Modifier and TypeMethodDescriptionvoid
Called after the get(...) operation is completed.void
Called after the put(...) operation is completed.void
afterRemove
(Object oldValue) Called after the remove(...) operation is completed.interceptGet
(Object value) Intercepts the get operation before returning value.interceptPut
(Object oldValue, Object newValue) Intercepts the put operation before modifying the map data.interceptRemove
(Object removedValue) Intercepts the remove operation before removing the data.
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Method Details
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interceptGet
Intercepts the get operation before returning value.Returns another object to change the return value of get(...) operations. Returning
null
will cause the get(...) operation to return the original value, so returnnull
if you do not want to change anything.Mutations made to the value do not affect the stored value. They do affect the returned value.
- Parameters:
value
- the original value to be returned as the result of get(...) operation- Returns:
- the new value that will be returned by the get(...) operation
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afterGet
Called after the get(...) operation is completed.Mutations made to value do not affect the stored value.
- Parameters:
value
- the value returned as the result of the get(...) operation
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interceptPut
Intercepts the put operation before modifying the map data.Returns the object to be put into the map. Returning
null
will cause the put(...) operation to operate as expected, namely no interception. Throwing an exception will cancel the put operation.- Parameters:
oldValue
- the value currently in mapnewValue
- the new value to be put into the map- Returns:
- new value after the intercept operation
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afterPut
Called after the put(...) operation is completed.- Parameters:
value
- the value returned as the result of the put(...) operation
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interceptRemove
Intercepts the remove operation before removing the data.Returns the object to be returned as the result of the remove operation. Throwing an exception will cancel the remove operation.
- Parameters:
removedValue
- the existing value to be removed- Returns:
- the value to be returned as the result of remove operation
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afterRemove
Called after the remove(...) operation is completed.- Parameters:
oldValue
- the value returned as the result of the remove(...) operation
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