ExtensionRegistry (Hippo CMS7 Services 15.6.0 API)

java.lang.Object
- org.onehippo.cms7.services.extension.ExtensionRegistry

```
public class ExtensionRegistry
extends Object
```
Registry of Hippo CMS extensions provided via classloaders other than the main repository classloader. This is typically used to register HST site delivery code loaded via a separate WAR file.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class ExtensionRegistry.ExtensionType

Constructor Summary

Constructors
Constructor Description

ExtensionRegistry()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static ExtensionEvent`	`getExtension(String hstRoot)`
`static Map<String,ExtensionEvent>`	`getHstRoots()`
`static void`	`register(ExtensionEvent extensionEvent, ExtensionRegistry.ExtensionType type)`	Register a extension event
`static void`	`unregister(String hstRoot)`	Unregister extension

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

- Constructor Detail
  - ExtensionRegistry
```
public ExtensionRegistry()
```
- Method Detail
  - register
```
public static void register(ExtensionEvent extensionEvent,
                            ExtensionRegistry.ExtensionType type)
```
    Register a extension event
    
    Parameters:
    
    type - the WebAppType to which the ctx belongs. Not allowed to be null
    
    Throws:
    
    IllegalStateException - if the extension already has been registered by its hst root
  - unregister
```
public static void unregister(String hstRoot)
```
    Unregister extension
    
    Parameters:
    
    hstRoot - the hst root to unregister
    
    Throws:
    
    IllegalStateException - if the extension has not been registered by its hst root
  - getExtension
```
public static ExtensionEvent getExtension(String hstRoot)
```
    Parameters:
    
    hstRoot - The hst root for which of the extension
    
    Returns:
    
    the extension registered under the extension's hst root
  - getHstRoots
```
public static Map<String,ExtensionEvent> getHstRoots()
```
    Returns:
    
    unmodifiable map of all currently registered extensions mapped by their hst root