CountConcurrencyListener (AO Servlet Filter 2.3.0-POST-SNAPSHOT API)

java.lang.Object
- com.aoindustries.servlet.filter.CountConcurrencyListener

All Implemented Interfaces:

EventListener, ServletRequestListener
```
@WebListener
public class CountConcurrencyListener
extends Object
implements ServletRequestListener
```
Tracks the request concurrency, used to decide to use concurrent or sequential implementations.

Field Summary

Fields
Modifier and Type Field Description

static String REQUEST_ATTRIBUTE

Constructor Summary

Constructors
Constructor Description

CountConcurrencyListener()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static Integer`	`getConcurrency(ServletRequest request)`	Gets the concurrency at the beginning of the request or `null` when listener not active.
`void`	`requestDestroyed(ServletRequestEvent event)`
`void`	`requestInitialized(ServletRequestEvent event)`

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

- Field Detail
  - REQUEST_ATTRIBUTE
```
public static final String REQUEST_ATTRIBUTE
```
- Constructor Detail
  - CountConcurrencyListener
```
public CountConcurrencyListener()
```
- Method Detail
  - getConcurrency
```
public static Integer getConcurrency(ServletRequest request)
```
    Gets the concurrency at the beginning of the request or null when listener not active.
  - requestInitialized
```
public void requestInitialized(ServletRequestEvent event)
```
    Specified by:
    
    requestInitialized in interface ServletRequestListener
  - requestDestroyed
```
public void requestDestroyed(ServletRequestEvent event)
```
    Specified by:
    
    requestDestroyed in interface ServletRequestListener