Package org.cache2k.io

Interface AsyncCacheLoader<K,V>

All Superinterfaces:

Customization, DataAware<K,V>, DataAwareCustomization<K,V>

All Known Subinterfaces:

AsyncBulkCacheLoader<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 AsyncCacheLoader<K,V>
extends DataAwareCustomization<K,V>

Alternative interface to CacheLoader for asynchronous operation. There is also version with bulk support, AsyncBulkCacheLoader.

Since:

2.0

Author:

Jens Wilke

See Also:

CacheLoader, AsyncBulkCacheLoader

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	AsyncCacheLoader.Callback<V>	Callback for async cache load.
static interface	AsyncCacheLoader.Context<K,V>	Relevant context information for a single load request.

Method Summary

Modifier and Type	Method	Description
void	load(K key, AsyncCacheLoader.Context<K,V> context, AsyncCacheLoader.Callback<V> callback)	Starts an asynchronous load operation.

Method Detail

load

void load(K key,
          AsyncCacheLoader.Context<K,V> context,
          AsyncCacheLoader.Callback<V> callback)
   throws Exception

Starts an asynchronous load operation.

If this call throws an exception, it is assumed that the load operation was not started and the callback will not be called.

Parameters:

key - key of the value to load

context - additional context information for the load operation

callback - interface to notify for load completion

Throws:

Exception - an exception, if the load operation cannot be started