io.lettuce.core.internal

Class Store

java.lang.Object

io.lettuce.core.internal.Store

public final class Store
extends Object

A thread-safe, lazily-populated cache keyed by an opaque Object. The value for a key is built on its first access and reused for every subsequent access with that key.

Each connection holds one Store to cache the command APIs created through its commands(...) accessors, so a given factory key yields a single instance per connection.

Since:

7.8

Author:

Aleksandar Todorov

Constructor Summary

Constructors

Constructor and Description
Store()

Method Summary

Modifier and Type	Method and Description
<T> T	compute(Object key, Supplier<T> builder) Returns the value cached under key, building it via builder on first access.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Store

public Store()

Method Detail

compute

public <T> T compute(Object key,
                     Supplier<T> builder)

Returns the value cached under key, building it via builder on first access. The builder runs at most once per key.

Type Parameters:

T - the value type

Parameters:

key - the cache key

builder - builds the value on a cache miss

Returns:

the cached or newly built value