software.chronicle.datagrid.map.event

Interface MapEventListener<K,V>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface MapEventListener<K,V>

This breaks down the events on a Map. This is useful for providing one interface to handle all event types.

Method Summary

Modifier and Type	Method and Description
default void	onInsert(@NotNull String assetFullName, K key, V value) This method is invoked when an existing entry in a Map is changed.
default void	onRemove(@NotNull String assetFullName, K key, V value) This method is invoked when an existing entry in a Map is removed.
void	onUpdate(@NotNull String assetFullName, K key, V oldValue, V newValue) This method is invoked when an existing entry in a Map is changed.

Method Detail

onUpdate

void onUpdate(@NotNull
              @NotNull String assetFullName,
              @NotNull
              K key,
              @Nullable
              V oldValue,
              @Nullable
              V newValue)

This method is invoked when an existing entry in a Map is changed.

By default, this method is invoked by onInsert(String, Object, Object) and onRemove(String, Object, Object) if not specific implementations are supplied for them. In this case, the oldValue and newValue may be null.

Parameters:

assetFullName - full name of the asset to which the map belongs

key - of the existing entry that changed

oldValue - of the existing entry that changed

newValue - of the existing entry that changed

onInsert

default void onInsert(@NotNull
                      @NotNull String assetFullName,
                      @NotNull
                      K key,
                      @NotNull
                      V value)

This method is invoked when an existing entry in a Map is changed.

Parameters:

assetFullName - full name of the asset to which the map belongs

key - of the newly inserted entry

value - of the newly inserted entry

onRemove

default void onRemove(@NotNull
                      @NotNull String assetFullName,
                      @NotNull
                      K key,
                      @NotNull
                      V value)

This method is invoked when an existing entry in a Map is removed.

Parameters:

assetFullName - full name of the asset to which the map belongs

key - of the newly removed entry

value - of the newly removed entry