EnvironmentCache (Commons Discovery (Version 0.4))

java.lang.Object
- org.apache.commons.discovery.tools.EnvironmentCache

```
public class EnvironmentCache
extends java.lang.Object
```
Cache by a 'key' unique to the environment: - ClassLoader::groupContext::Object Cache Cache : HashMap Key : Thread Context Class Loader (ClassLoader) Value : groupContext::SPI Cache (HashMap) //- groupContext::Object Cache // Cache : HashMap // Key : groupContext (String) // Value : Object When we 'release', it is expected that the caller of the 'release' have the same thread context class loader... as that will be used to identify cached entries to be released.

Author:

Richard A. Sitze

Field Summary

Fields
Modifier and Type Field Description

static int smallHashSize
Initial hash size for SPI's, default just seem TO big today..

Constructor Summary

Constructors
Constructor Description

EnvironmentCache()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static java.lang.Object`	`get(java.lang.ClassLoader classLoader)`	Get object keyed by classLoader.
`static void`	`put(java.lang.ClassLoader classLoader, java.lang.Object object)`	Put service keyed by spi & classLoader.
`static void`	`release()`	Release all internal references to previously created service instances associated with the current thread context class loader.
`static void`	`release(java.lang.ClassLoader classLoader)`	Release any internal references to a previously created service instance associated with the current thread context class loader.

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

- Field Detail
  - smallHashSize
```
public static final int smallHashSize
```
    Initial hash size for SPI's, default just seem TO big today..
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - EnvironmentCache
```
public EnvironmentCache()
```
- Method Detail
  - get
```
public static java.lang.Object get(java.lang.ClassLoader classLoader)
```
    Get object keyed by classLoader.
  - put
```
public static void put(java.lang.ClassLoader classLoader,
                       java.lang.Object object)
```
    Put service keyed by spi & classLoader.
  - release
```
public static void release()
```
    Release all internal references to previously created service instances associated with the current thread context class loader. The release() method is called for service instances that implement the Service interface. This is useful in environments like servlet containers, which implement application reloading by throwing away a ClassLoader. Dangling references to objects in that class loader would prevent garbage collection.
  - release
```
public static void release(java.lang.ClassLoader classLoader)
```
    Release any internal references to a previously created service instance associated with the current thread context class loader. If the SPI instance implements Service, then call release().