EventHandler (OFBiz R18.12 API)

All Known Implementing Classes:

GroovyEventHandler, JavaEventHandler, RomeEventHandler, ScriptEventHandler, ServiceEventHandler, ServiceMultiEventHandler, SimpleEventHandler, SOAPEventHandler
```
public interface EventHandler
```
EventHandler - Event Handler Interface

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`init(javax.servlet.ServletContext context)`	Initializes the handler.
`java.lang.String`	`invoke(ConfigXMLReader.Event event, ConfigXMLReader.RequestMap requestMap, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)`	Invoke the web event

- Method Detail
  - init
```
void init(javax.servlet.ServletContext context)
   throws EventHandlerException
```
    Initializes the handler. Since handlers use the singleton pattern this method should only be called the first time the handler is used.
    
    Parameters:
    
    context - ServletContext This may be needed by the handler in order to lookup properties or XML definition files for rendering pages or handler options.
    
    Throws:
    
    EventHandlerException
  - invoke
```
java.lang.String invoke(ConfigXMLReader.Event event,
                        ConfigXMLReader.RequestMap requestMap,
                        javax.servlet.http.HttpServletRequest request,
                        javax.servlet.http.HttpServletResponse response)
                 throws EventHandlerException
```
    Invoke the web event
    
    Parameters:
    
    event - Contains information about what to execute
    
    requestMap - Contains information about the request-map the event was called from
    
    request - The servlet request object
    
    response - The servlet response object
    
    Returns:
    
    String Result code
    
    Throws:
    
    EventHandlerException