[Webinar] Streamline your web hosting managementRegister Today

x
?
Solved

HOWTO invoke a method on another Servlet from my Servlet?

Posted on 2001-08-14
7
Medium Priority
?
332 Views
Last Modified: 2013-11-24
Hello!

How can my Servlet invoke a public method on another Servlet?

Thanks.
0
Comment
Question by:jussara
7 Comments
 
LVL 1

Expert Comment

by:dviji
ID: 6386015
By using " InterServlet Communication" we will achive it.

Example:-

ServletContext sc = getServletConfig().getServletContext();
Enumeration  servletNames = sc.getServletNames(); //will return the available servlet names
MyServlet myServlet = (MyServlet)sc.getServlet("servletName "); //get the MyServlet instance from ServletContext
String name = myServlet.getNames(); //execute the public method.


...dviji





0
 
LVL 7

Expert Comment

by:tomboshell
ID: 6387238
Hmmm, interesting.  I was reading that the method 'getServletNames()' is deprecated.  It wont be along much longer.  So, I would guess in such a situation the use of reflection would work.  But it is an interesting problem.  

Tom
0
 
LVL 19

Accepted Solution

by:
Jim Cakalic earned 140 total points
ID: 6388476
My understanding, also. Prior to Servlet 2.1 it was possible for one servlet to call the methods of another servlet directly. A strictly-conforming 2.1 engine will not allow this. Instead, there are other mechanisms to accomplish "servlet-chaining". For details of both the pre-2.1 and post-2.1 techniques and examples, have a look at:
    http://novocode.de/doc/servlet-essentials/chapter3.html

Best regards,
Jim Cakalic
0
Never miss a deadline with monday.com

The revolutionary project management tool is here!   Plan visually with a single glance and make sure your projects get done.

 
LVL 6

Expert Comment

by:jwenting
ID: 6409120
interservlet communication was deprecated and will be (has been?) removed in later versions because of security reasons.

The best way to achieve it is by having the servlets call one another over HTTP, and having the service method throw back the response based on the parameters passed (passing in the function to be called as a parameter, and parameters to it as other parameters for example).
0
 

Expert Comment

by:CleanupPing
ID: 9061865
jussara:
This old question needs to be finalized -- accept an answer, split points, or get a refund.  For information on your options, please click here-> http:/help/closing.jsp#1 
EXPERTS:
Post your closing recommendations!  No comment means you don't care.
0
 
LVL 19

Expert Comment

by:Jim Cakalic
ID: 9072392
Recommendation: points to jim_cakalic
0
 
LVL 20

Expert Comment

by:Venabili
ID: 9330390
No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:

- Points for jim_cakalic

Please leave any comments here within the next seven days.
 
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
 
Venabili
EE Cleanup Volunteer
0

Featured Post

The new generation of project management tools

With monday.com’s project management tool, you can see what everyone on your team is working in a single glance. Its intuitive dashboards are customizable, so you can create systems that work for you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.
Suggested Courses
Course of the Month8 days, 7 hours left to enroll

611 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question