程序包 com.alicp.jetcache

类 RefreshCache<K,V>

java.lang.Object

com.alicp.jetcache.SimpleProxyCache<K,V>

com.alicp.jetcache.LoadingCache<K,V>

com.alicp.jetcache.RefreshCache<K,V>

所有已实现的接口:

Cache<K,V>, ProxyCache<K,V>, Closeable, AutoCloseable

public class RefreshCache<K,V>
extends LoadingCache<K,V>

Created on 2017/5/25.

作者:

huangli

字段概要

字段

修饰符和类型	字段	说明
static final byte[]	LOCK_KEY_SUFFIX
static final byte[]	TIMESTAMP_KEY_SUFFIX

构造器概要

构造器

构造器	说明
RefreshCache(Cache cache)

方法概要

修饰符和类型	方法	说明
void	close()	Clean resources created by this cache.
V	computeIfAbsent(K key, Function<K,V> loader)	If there is a value associated with the key, return the value; otherwise use the loader load the value and return, and then update the cache.
V	computeIfAbsent(K key, Function<K,V> loader, boolean cacheNullWhenLoaderReturnNull)	If there is a value associated with the key, return the value; otherwise use the loader load the value and return, and then update the cache.
V	computeIfAbsent(K key, Function<K,V> loader, boolean cacheNullWhenLoaderReturnNull, long expireAfterWrite, TimeUnit timeUnit)	If there is a value associated with the key, return the value; otherwise use the loader load the value and return, and then update the cache.
V	get(K key)	Gets an entry from the cache.
Map<K,V>	getAll(Set<? extends K> keys)	Gets a collection of entries from the Cache, returning them as Map of the values associated with the set of keys requested.

从类继承的方法 com.alicp.jetcache.SimpleProxyCache

config, GET, GET_ALL, getTargetCache, put, put, PUT, PUT, PUT_ALL, PUT_ALL, PUT_IF_ABSENT, putAll, putAll, putIfAbsent, remove, REMOVE, REMOVE_ALL, removeAll, tryLock, tryLockAndRun, unwrap

从类继承的方法 java.lang.Object

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

字段详细资料

LOCK_KEY_SUFFIX

public static final byte[] LOCK_KEY_SUFFIX

TIMESTAMP_KEY_SUFFIX

public static final byte[] TIMESTAMP_KEY_SUFFIX

构造器详细资料

RefreshCache

public RefreshCache(Cache cache)

方法详细资料

close

public void close()

从接口复制的说明: Cache

Clean resources created by this cache.

指定者:

close 在接口中 AutoCloseable

指定者:

close 在接口中 Cache<K,V>

指定者:

close 在接口中 Closeable

覆盖:

close 在类中 SimpleProxyCache<K,V>

computeIfAbsent

public V computeIfAbsent(K key,
 Function<K,V> loader)

从接口复制的说明: Cache

If there is a value associated with the key, return the value; otherwise use the loader load the value and return, and then update the cache.

指定者:

computeIfAbsent 在接口中 Cache<K,V>

覆盖:

computeIfAbsent 在类中 SimpleProxyCache<K,V>

参数:

key - the key

loader - the value loader

返回:

the value

另请参阅:

• CacheConfig.isCacheNullValue()

computeIfAbsent

public V computeIfAbsent(K key,
 Function<K,V> loader,
 boolean cacheNullWhenLoaderReturnNull)

从接口复制的说明: Cache

If there is a value associated with the key, return the value; otherwise use the loader load the value and return, and then update the cache.

指定者:

computeIfAbsent 在接口中 Cache<K,V>

覆盖:

computeIfAbsent 在类中 SimpleProxyCache<K,V>

参数:

key - the key

loader - the value loader

cacheNullWhenLoaderReturnNull - true if null value returned by loader should put into cache use the key

返回:

the value

computeIfAbsent

public V computeIfAbsent(K key,
 Function<K,V> loader,
 boolean cacheNullWhenLoaderReturnNull,
 long expireAfterWrite,
 TimeUnit timeUnit)

从接口复制的说明: Cache

If there is a value associated with the key, return the value; otherwise use the loader load the value and return, and then update the cache.

指定者:

computeIfAbsent 在接口中 Cache<K,V>

覆盖:

computeIfAbsent 在类中 SimpleProxyCache<K,V>

参数:

key - the key

loader - the value loader

cacheNullWhenLoaderReturnNull - true if null value returned by loader should put into cache use the key

expireAfterWrite - the TTL(time to live) of the KV association

timeUnit - the time unit of expireAfterWrite

返回:

the value

get

public V get(K key)
      throws CacheInvokeException

从接口复制的说明: Cache

Gets an entry from the cache.

If the cache's builder has specified a CacheLoader and there is no association in the cache , it will attempt to load the entry.

If error occurs during cache access, the method return null instead of throwing an exception.

指定者:

get 在接口中 Cache<K,V>

覆盖:

get 在类中 LoadingCache<K,V>

参数:

key - the key whose associated value is to be returned

返回:

the associated value. null may indicates:

• the entry does not exist or expired
• the entry value is null
• error occurs during cache access(no exception throws)

抛出:

CacheInvokeException - only if loader throws an exception

另请参阅:

• CacheLoader
• Cache.GET(Object)

getAll

public Map<K,V> getAll(Set<? extends K> keys)
                throws CacheInvokeException

从接口复制的说明: Cache

Gets a collection of entries from the Cache, returning them as Map of the values associated with the set of keys requested.

If the cache's builder has specified a CacheLoader and there is no association in the cache , it will attempt to load the entry.

If error occurs during cache access, the method will not throw an exception.

指定者:

getAll 在接口中 Cache<K,V>

覆盖:

getAll 在类中 LoadingCache<K,V>

参数:

keys - The keys whose associated values are to be returned.

返回:

A map of entries that were found for the given keys. Keys not found in the cache are not in the returned map.

抛出:

CacheInvokeException - only if loader throws an exception

另请参阅:

• CacheLoader
• Cache.GET_ALL(Set)