CODEWITHSUNDEEP
javaweb-applicationsinitializationshutdown
ChRoNoN
ChRoNoN

Reputation: 900

java web-application initialization and shutdown

I'm trying to implements initialization and shutdown of a webapp. That includes initialization and shutdown of:

Using Tomcat 5.5.30 and Java 6. My idea is to avoid resource leaking, mostly because of the redeploy of the webapp in the development environment.

How should I implement this?

Upvotes: 14

Views: 9350

Answers (3)

ziodraw
ziodraw

Reputation: 189

Its also possible to use the HTTP Servlet instead but the listener is a better option.

You have to extend a class with HttpServlet and setting the following stuff to your web.xml:

<servlet>
    <servlet-name>StartupServlet</servlet-name>
    <servlet-class>your.package.servlets.StartupServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

The class can overwrite the init and the destroy method.

Upvotes: 1

lalit
lalit

Reputation: 1475

But still you want to manage your resources in such a way that they do not leak if the application crashes and normal shutdown routines are not called.

Upvotes: 0

Pablo Santa Cruz
Pablo Santa Cruz

Reputation: 181290

Usually for Web initialization and shutdown, you will write a ServletContextListener.

The steps to do this are:

  1. Write a class that implements javax.Servlet.ServletContextListener
  2. Add a tag to web.xml deployment descriptor to register the class you've just created
  3. Deploy your application

When you deploy your application, contextInitialized method will be called. You can place all initialization you want here. On application shutdown contextDestroyed method will be called.

Upvotes: 21

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