org.flowable.common.engine.impl.de.odysseus.el.tree.impl

Class Cache

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 and 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

Modifier and Type	Method and 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