ObserversHandler (canl 2.8.2 API)

java.lang.Object
- eu.emi.security.authn.x509.helpers.ObserversHandler

```
public class ObserversHandler
extends java.lang.Object
```
Thread safe class maintaining a collection of StoreUpdateListeners. Type-safe counterpart of Observable.

Author:

K. Benedyczak

Constructor Summary

Constructors
Constructor Description

ObserversHandler()

ObserversHandler(java.util.Collection<? extends StoreUpdateListener> initialObservers)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addObserver(StoreUpdateListener listener)`	Registers a listener which can react to errors found during refreshing of the trust material: trusted CAs or CRLs.
`void`	`notifyObservers(java.lang.String url, java.lang.String type, StoreUpdateListener.Severity level, java.lang.Exception e)`
`void`	`removeAllObservers()`
`void`	`removeObserver(StoreUpdateListener listener)`	Unregisters a previously registered CA or CRL update listener.

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

- Constructor Detail
  - ObserversHandler
```
public ObserversHandler()
```
  - ObserversHandler
```
public ObserversHandler(java.util.Collection<? extends StoreUpdateListener> initialObservers)
```
- Method Detail
  - addObserver
```
public void addObserver(StoreUpdateListener listener)
```
    Registers a listener which can react to errors found during refreshing of the trust material: trusted CAs or CRLs. This method is useful only if the implementation supports updating of CAs or CRLs, otherwise the listener will not be invoked.
    
    Parameters:
    
    listener - to be registered
  - removeObserver
```
public void removeObserver(StoreUpdateListener listener)
```
    Unregisters a previously registered CA or CRL update listener. If the listener was not registered then the method does nothing.
    
    Parameters:
    
    listener - to be unregistered
  - notifyObservers
```
public void notifyObservers(java.lang.String url,
                            java.lang.String type,
                            StoreUpdateListener.Severity level,
                            java.lang.Exception e)
```
  - removeAllObservers
```
public void removeAllObservers()
```