org.apache.ignite.internal.processors.metastorage

Interface DistributedMetaStorageListener<T extends Serializable>

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 DistributedMetaStorageListener<T extends Serializable>

Listener for distributed metastorage data updates.

See Also:

ReadableDistributedMetaStorage.listen(Predicate, DistributedMetaStorageListener)

Method Summary

Modifier and Type	Method and Description
void	onUpdate(@NotNull String key, T oldVal, T newVal) Invoked in two cases: data was dynamicaly updated; node was started.

Method Detail

onUpdate

void onUpdate(@NotNull
              @NotNull String key,
              @Nullable
              T oldVal,
              @Nullable
              T newVal)

Invoked in two cases:

• data was dynamicaly updated;
• node was started. In this case oldVal and newVal might be different only if new data was received from cluster

Parameters:

key - The key.

oldVal - Previous value associated with the key.

newVal - New value after update.