• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Liutauras Vilda
  • Jeanne Boyarsky
  • Devaka Cooray
  • Paul Clapham
Sheriffs:
  • Tim Cooke
  • Knute Snortum
  • Bear Bibeault
Saloon Keepers:
  • Ron McLeod
  • Tim Moores
  • Stephan van Hulst
  • Piet Souris
  • Ganesh Patekar
Bartenders:
  • Frits Walraven
  • Carey Brown
  • Tim Holloway

Question on Deployment descriptor - Order of Listeners and Servlets

 
Greenhorn
Posts: 8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Does the order of Listeners and Servlets matter in DD ?

I came across this question (in italics below) on JavaRanch Mock exam and as per it the order does matter. But on Pg 174 of HFSJ, I see a DD with "listener" element after "servlet" element. Any thoughts ??

<web-app>
<servlet>
.....
</servlet>
<listener>
<listener-class>com.javaranch.LogListener</listener-class>
</listener>
</web-app>

The above entry in the Deployment Descriptor(DD) will result in which of the following?


Answer: The webapp will not be loaded due to a parse exception of the DD.

Explanation: The ordering of the DD is listener then servlet.
 
Ranch Hand
Posts: 42
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The question in JavaRanch targes Servlet spec 2.3. In 2.3, <listener> must appear before <servlet> element in deployment descriptor. As of 2.4, the order of <servlet> and <listener> does not matter.
 
It is sorta covered in the JavaRanch Style Guide.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!