InitializerServletContextListener (OpenNMS Web APIs 33.0.7 API)

java.lang.Object
- org.opennms.web.servlet.InitializerServletContextListener

All Implemented Interfaces:

EventListener, javax.servlet.ServletContextListener
```
public class InitializerServletContextListener
extends Object
implements javax.servlet.ServletContextListener
```
This listener is specified in the web.xml to listen to ServletContext lifecyle events. On startup it calls ServletInitializer.init(javax.servlet.ServletContext) to set up OpenNMS-specific properties and starts an RTC subscription timer. On shutdown it stops the RTC timer.

Author:

Lawrence Karnowski

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`InitializerServletContextListener.RTCPostSubscriberTimerTask`	This task is used to call `RTCPostSubscriber.subscribeAll(String)` if the categories have not been updated recently or ever (such as at startup).

Constructor Summary

Constructors
Constructor Description

InitializerServletContextListener()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`contextDestroyed(javax.servlet.ServletContextEvent event)`	Cancel the RTC subscription timer.
`void`	`contextInitialized(javax.servlet.ServletContextEvent event)`

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

- Constructor Detail
  - InitializerServletContextListener
```
public InitializerServletContextListener()
```
- Method Detail
  - contextInitialized
```
public void contextInitialized(javax.servlet.ServletContextEvent event)
```
    Specified by:
    
    contextInitialized in interface javax.servlet.ServletContextListener
  - contextDestroyed
```
public void contextDestroyed(javax.servlet.ServletContextEvent event)
```
    Cancel the RTC subscription timer.
    
    Specified by:
    
    contextDestroyed in interface javax.servlet.ServletContextListener