Cache (Flowable - Engine Common 6.8.1 API)

java.lang.Object
- org.flowable.common.engine.impl.de.odysseus.el.tree.impl.Cache

All Implemented Interfaces:

TreeCache
```
public final class Cache
extends Object
implements TreeCache
```
Concurrent (thread-safe) FIFO tree cache (using classes from java.util.concurrent). After the cache size reached a certain limit, some least recently used entry are removed, when adding a new entry.

Author:

Christoph Beck

Constructor Summary

Constructors
Constructor	Description
`Cache(int capacity)`	Creates a new cache with the specified capacity and default concurrency level (16).
`Cache(int capacity, int concurrencyLevel)`	Creates a new cache with the specified capacity and concurrency level.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Tree`	`get(String expression)`	Lookup tree
`void`	`put(String expression, Tree tree)`	Cache tree
`int`	`size()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Cache
```
public Cache(int capacity)
```
    Creates a new cache with the specified capacity and default concurrency level (16).
    
    Parameters:
    
    capacity - Cache size. The actual size may exceed it temporarily.
  - Cache
```
public Cache(int capacity,
             int concurrencyLevel)
```
    Creates a new cache with the specified capacity and concurrency level.
    
    Parameters:
    
    capacity - Cache size. The actual map size may exceed it temporarily.
    
    concurrencyLevel - The estimated number of concurrently updating threads. The implementation performs internal sizing to try to accommodate this many threads.
- Method Detail
  - size
```
public int size()
```
  - get
```
public Tree get(String expression)
```
    Description copied from interface: TreeCache
    
    Lookup tree
    
    Specified by:
    
    get in interface TreeCache
  - put
```
public void put(String expression,
                Tree tree)
```
    Description copied from interface: TreeCache
    
    Cache tree
    
    Specified by:
    
    put in interface TreeCache