com.lucidworks.fusion.connector.plugin.api.cache

Interface CacheManager<T>

public interface CacheManager<T>

Method Summary

Modifier and Type	Method and Description
void	clear() clear plugins cache
boolean	contains(java.lang.String key) Clear plugins cache.
java.util.Optional<T>	get(java.lang.String key) Returns a populated #Optional if the value exists, otherwise Optional.empty().
T	get(java.lang.String key, java.util.function.BiFunction<java.lang.String,T,T> loader) Get or load a value by supplying a key, value, and function.
T	get(java.lang.String key, java.util.function.Function<java.lang.String,T> loader) Get or load a value by supplying a key and function.
void	init(java.lang.String pluginType) Initialize cache for pluginType
java.util.Optional<T>	invalidate(java.lang.String key) Invalidates, or removes the associated cache entry.
java.util.Optional<T>	put(java.lang.String key, T value) Populate a cache with value.

Method Detail

init

void init(java.lang.String pluginType)

Initialize cache for pluginType

Parameters:

pluginType - pluginType

get

java.util.Optional<T> get(java.lang.String key)

Returns a populated #Optional if the value exists, otherwise Optional.empty().

Parameters:

key - key

Returns:

The return value.

put

java.util.Optional<T> put(java.lang.String key,
                          T value)

Populate a cache with value.

Parameters:

key - key

value - value

Returns:

The return value is previous value.

get

T get(java.lang.String key,
      java.util.function.Function<java.lang.String,T> loader)

Get or load a value by supplying a key and function. The function is provided an #Optional, representing the existing value, if any.

Parameters:

key - key

loader - loader

Returns:

existing or new value

get

T get(java.lang.String key,
      java.util.function.BiFunction<java.lang.String,T,T> loader)

Get or load a value by supplying a key, value, and function. The bi function can access existing value and produce new value from it.

Parameters:

key - key

loader - bi function loader

Returns:

null if key is not present, otherwise return new value

invalidate

java.util.Optional<T> invalidate(java.lang.String key)

Invalidates, or removes the associated cache entry.

Parameters:

key - key

Returns:

Returns a populated #Optional if the entry existed, otherwise Optional.empty().

contains

boolean contains(java.lang.String key)

Clear plugins cache.

Parameters:

key - key

Returns:

boolean value indicating whether cache contains key or not

clear

void clear()

clear plugins cache