RongCache (release 4.1.1.2)

java.lang.Object
- io.rong.imkit.cache.RongCache<K,V>

直接已知子类:

RongCacheWrap
```
public class RongCache<K,V>
extends java.lang.Object
```
Modify by DragonJ on 14/11/28. Add queue for change the way of recycle.

构造器概要

构造器
构造器和说明

RongCache(int maxSize)

构造器
构造器和说明
`RongCache(int maxSize)`

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`void`	`clear()`
`protected V`	`create(K key)` Called after a cache miss to compute a value for the corresponding key.
`int`	`createCount()` Returns the number of times `create(Object)` returned a value.
`protected void`	`entryRemoved(boolean evicted, K key, V oldValue, V newValue)` Called for entries that have been evicted or removed.
`void`	`evictAll()` Clear the cache, calling `entryRemoved(boolean, K, V, V)` on each removed entry.
`int`	`evictionCount()` Returns the number of values that have been evicted.
`V`	`get(K key)` Returns the value for `key` if it exists in the cache or can be created by `#create`.
`int`	`hitCount()` Returns the number of times `get(K)` returned a value that was already present in the cache.
`int`	`maxSize()` For caches that do not override `sizeOf(K, V)`, this returns the maximum number of entries in the cache.
`int`	`missCount()` Returns the number of times `get(K)` returned null or required a new value to be created.
`V`	`put(K key, V value)` Caches `value` for `key`.
`int`	`putCount()` Returns the number of times `put(K, V)` was called.
`V`	`remove(K key)` Removes the entry for `key` if it exists.
`void`	`resize(int maxSize)` Sets the size of the cache.
`int`	`size()` For caches that do not override `sizeOf(K, V)`, this returns the number of entries in the cache.
`protected int`	`sizeOf(K key, V value)` Returns the size of the entry for `key` and `value` in user-defined units.
`java.util.Map<K,V>`	`snapshot()` Returns a copy of the current contents of the cache, ordered from least recently accessed to most recently accessed.
`java.lang.String`	`toString()`

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 构造器详细资料
  - RongCache
```
public RongCache(int maxSize)
```
    参数:
    
    maxSize - for caches that do not override sizeOf(K, V), this is the maximum number of entries in the cache. For all other caches, this is the maximum sum of the sizes of the entries in this cache.
- 方法详细资料
  - resize
```
public void resize(int maxSize)
```
    Sets the size of the cache.
    
    参数:
    
    maxSize - The new maximum size.
  - get
```
public final V get(K key)
```
    Returns the value for key if it exists in the cache or can be created by #create. If a value was returned, it is moved to the head of the queue. This returns null if a value is not cached and cannot be created.
  - put
```
public final V put(K key,
                   V value)
```
    Caches value for key. The value is moved to the head of the queue.
    
    返回:
    
    the previous value mapped by key.
  - remove
```
public final V remove(K key)
```
    Removes the entry for key if it exists.
    
    返回:
    
    the previous value mapped by key.
  - clear
```
public void clear()
```
  - entryRemoved
```
protected void entryRemoved(boolean evicted,
                            K key,
                            V oldValue,
                            V newValue)
```
    Called for entries that have been evicted or removed. This method is invoked when a value is evicted to make space, removed by a call to remove(K), or replaced by a call to put(K, V). The default implementation does nothing.
    The method is called without synchronization: other threads may access the cache while this method is executing.
    
    参数:
    
    evicted - true if the entry is being removed to make space, false if the removal was caused by a put(K, V) or remove(K).
    
    newValue - the new value for key, if it exists. If non-null, this removal was caused by a put(K, V). Otherwise it was caused by an eviction or a remove(K).
  - create
```
protected V create(K key)
```
    Called after a cache miss to compute a value for the corresponding key. Returns the computed value or null if no value can be computed. The default implementation returns null.
    The method is called without synchronization: other threads may access the cache while this method is executing.
    If a value for key exists in the cache when this method returns, the created value will be released with entryRemoved(boolean, K, V, V) and discarded. This can occur when multiple threads request the same key at the same time (causing multiple values to be created), or when one thread calls put(K, V) while another is creating a value for the same key.
  - sizeOf
```
protected int sizeOf(K key,
                     V value)
```
    Returns the size of the entry for key and value in user-defined units. The default implementation returns 1 so that size is the number of entries and max size is the maximum number of entries.
    An entry's size must not change while it is in the cache.
  - evictAll
```
public final void evictAll()
```
    Clear the cache, calling entryRemoved(boolean, K, V, V) on each removed entry.
  - size
```
public final int size()
```
    For caches that do not override sizeOf(K, V), this returns the number of entries in the cache. For all other caches, this returns the sum of the sizes of the entries in this cache.
  - maxSize
```
public final int maxSize()
```
    For caches that do not override sizeOf(K, V), this returns the maximum number of entries in the cache. For all other caches, this returns the maximum sum of the sizes of the entries in this cache.
  - hitCount
```
public final int hitCount()
```
    Returns the number of times get(K) returned a value that was already present in the cache.
  - missCount
```
public final int missCount()
```
    Returns the number of times get(K) returned null or required a new value to be created.
  - createCount
```
public final int createCount()
```
    Returns the number of times create(Object) returned a value.
  - putCount
```
public final int putCount()
```
    Returns the number of times put(K, V) was called.
  - evictionCount
```
public final int evictionCount()
```
    Returns the number of values that have been evicted.
  - snapshot
```
public final java.util.Map<K,V> snapshot()
```
    Returns a copy of the current contents of the cache, ordered from least recently accessed to most recently accessed.
  - toString
```
public final java.lang.String toString()
```
    覆盖:
    
    toString 在类中 java.lang.Object

类 RongCache<K,V>

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

RongCache

方法详细资料

resize

get

put

remove

clear

entryRemoved

create

sizeOf

evictAll

size

maxSize

hitCount

missCount

createCount

putCount

evictionCount

snapshot

toString