ConcurrentFixedCache (EclipseLink Core 4.0.2 API)

java.lang.Object
- org.eclipse.persistence.internal.helper.ConcurrentFixedCache

All Implemented Interfaces:

Serializable
```
public class ConcurrentFixedCache
extends Object
implements Serializable
```
Provide a concurrent fixed size caching mechanism. This is used for caching EJBQL parsed queries, Update calls, and other places a fixed size cache is needed. The default fixed size is 100.

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

protected Map cache

protected int maxSize

Constructor Summary

Constructors
Constructor	Description
`ConcurrentFixedCache()`	Create a new concurrent cache, with a fixed size of 100.
`ConcurrentFixedCache(int maxSize)`	Create a new concurrent cache, with the max size.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`
`Object`	`get(Object key)`	Return the pre-parsed query that represents the EJBQL string.
`Map`	`getCache()`	Return the cache.
`int`	`getMaxSize()`	Return the fixed size of the parse cache.
`void`	`put(Object key, Object value)`	Add the value to the cache.
`void`	`remove(Object key)`	Remove from cache.
`void`	`setMaxSize(int maxSize)`	Set the fixed size of the parse cache.

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

- Field Detail
  - maxSize
```
protected int maxSize
```
  - cache
```
protected Map cache
```
- Constructor Detail
  - ConcurrentFixedCache
```
public ConcurrentFixedCache()
```
    Create a new concurrent cache, with a fixed size of 100.
  - ConcurrentFixedCache
```
public ConcurrentFixedCache(int maxSize)
```
    Create a new concurrent cache, with the max size.
- Method Detail
  - getMaxSize
```
public int getMaxSize()
```
    Return the fixed size of the parse cache.
  - setMaxSize
```
public void setMaxSize(int maxSize)
```
    Set the fixed size of the parse cache. When the size is exceeded, subsequent EJBQL will not be cached. The default size is 100;
  - get
```
public Object get(Object key)
```
    Return the pre-parsed query that represents the EJBQL string. If the EJBQL has not been cached, null is returned.
  - clear
```
public void clear()
```
  - put
```
public void put(Object key,
                Object value)
```
    Add the value to the cache. Remove the
  - remove
```
public void remove(Object key)
```
    Remove from cache.
  - getCache
```
public Map getCache()
```
    Return the cache.