Package wt.servlet

Class ContextMonitor

java.lang.Object

javax.management.StandardMBean

wt.jmx.core.StandardMBean

wt.servlet.ContextMonitor

All Implemented Interfaces:

EventListener, DynamicMBean, MBeanRegistration, NotificationBroadcaster, NotificationEmitter, javax.servlet.ServletContextListener, BaseObjectNamed, SelfEmailingMBean, ContextMonitorMBean

public final class ContextMonitor
extends StandardMBean
implements ContextMonitorMBean, BaseObjectNamed, javax.servlet.ServletContextListener, NotificationEmitter

Simple ServletContextListener/MBean which provides basic information on a web app context. More importantly, this ensures a proper log4j RepositySelector has been installed where appropriate and possible and loads other MBeans for the web app from a configuration file upon web app startup and shuts these down upon web app shutdown. Note not all MBeans are loaded from file here; in cases where the MBean is also a servlet engine listener of some variety the MBean is configured via web.xml and initialized by the servlet engine.

This MBean's configuration is very simple and is managed by via web app context parameters (in web.xml) with names as indicated by *_PARAM_NAME constants in this class.

Supported API: true

Extendable: false

Field Summary

Fields inherited from interface wt.servlet.ContextMonitorMBean

LOG4J_CONFIG_FILE_REF_PARAM_NAME, MBEAN_CONFIG_CHECK_INTERVAL_PARAM_NAME, MBEAN_CONFIG_FILE_REF_PARAM_NAME, ROOT_LOG4J_CONFIG_CHECK_INTERVAL_PARAM_NAME, WEB_APP_STARTING_NOTIF, WEB_APP_STOPPING_NOTIF

Method Summary

Modifier and Type	Method	Description
static ContextMonitor	getContextMonitor(javax.servlet.ServletContext servletContext)	Retrieve instance associated with a given ServletContext (web app).
MBeanLoader	getMBeanLoader()	Return this MBean's MBeanLoader.

Methods inherited from class wt.jmx.core.StandardMBean

cacheMBeanInfo, cacheMBeanInfoInInstance, createMBeanInfo, emailThisMBean, getAttributes, getCachedInstanceMBeanInfo, getCachedMBeanInfo, getDescription, getDescription, getDescription, getDescription, getImpact, getMBeanInfo, getParameterName, setAttributes

Methods inherited from class javax.management.StandardMBean

getAttribute, getClassName, getConstructors, getDescription, getDescription, getDescription, getImplementation, getImplementationClass, getMBeanInterface, getParameterName, invoke, postDeregister, postRegister, preDeregister, preRegister, setAttribute, setImplementation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface wt.jmx.core.mbeans.SelfEmailingMBean

emailThisMBean

Method Details

getContextMonitor

public static ContextMonitor getContextMonitor(javax.servlet.ServletContext servletContext)

Retrieve instance associated with a given ServletContext (web app).

Supported API: true

getMBeanLoader

public MBeanLoader getMBeanLoader()

Return this MBean's MBeanLoader.

Supported API: true