It's inevitable. People leave organizations creating a gap in your service. That's where Percona comes in.
See how Pepper.com relies on Percona to:
-Manage their database
-Guarantee data safety and protection
-Provide database expertise that is available for any situation
Course Of The Month
Become a Premium Member and unlock a new, free course in leading technologies each month.
Solved
Executing a unix shell script from an EJB
Posted on 2006-06-09
Hello,
I'm just starting with J2EE, so I hope you will bear with a very ignorant question. I have a legacy website which I would like to reimplement using some sort of MVC pattern. The site runs ksh scripts, and reads the resulting files, and the new site must do the same.
Can an EJB make calls out to the shell? How do I go about this? (I.e. is there anything special that I should know for it to work within J2EE?)
Many thanks!
Roger Pearse
I'm just starting with J2EE, so I hope you will bear with a very ignorant question. I have a legacy website which I would like to reimplement using some sort of MVC pattern. The site runs ksh scripts, and reads the resulting files, and the new site must do the same.
Can an EJB make calls out to the shell? How do I go about this? (I.e. is there anything special that I should know for it to work within J2EE?)
Many thanks!
Roger Pearse
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
-
2
4 Comments
Hi Roger
We can not call your shell scripts from your EJB. If it is manditory for your requirement you can Use struts frame work for your site. This Frame work will follow MVC 2 Design pattern and from Action class you can call Shell script like bellow
Process someAppProcess; //Handle to the process
try
{
someAppProcess = Runtime.getRuntime().exec(
}
catch(java.io.IOException e)
{
//Handle an IOException here.
return;
}
after getting script results put those results as per your wish. Some best practices are hold results in collection object, prepare DTO and pass it to the middle tier, means pass that DTO to Any session bean (EJB) from that middle tier you can communicate with the database.
Hope you have clear understading about MVC. If you are not willing to use Struts frame work you can write that code in ur Servlet also.
Hope this will help you and all the best for your site improvements :)
We can not call your shell scripts from your EJB. If it is manditory for your requirement you can Use struts frame work for your site. This Frame work will follow MVC 2 Design pattern and from Action class you can call Shell script like bellow
Process someAppProcess; //Handle to the process
try
{
someAppProcess = Runtime.getRuntime().exec(
}
catch(java.io.IOException e)
{
//Handle an IOException here.
return;
}
after getting script results put those results as per your wish. Some best practices are hold results in collection object, prepare DTO and pass it to the middle tier, means pass that DTO to Any session bean (EJB) from that middle tier you can communicate with the database.
Hope you have clear understading about MVC. If you are not willing to use Struts frame work you can write that code in ur Servlet also.
Hope this will help you and all the best for your site improvements :)
Many thanks for this. What is a DTO? (I think that I understand the MVC pattern, so your comment is helpful).
if you are using JBOSS then it comes with BSH deployer. Check http://wiki.jboss.org/wiki/Wiki.jsp?page=BSHDeployer
and check beanshell documentation: http://www.beanshell.org/docs.html
and check beanshell documentation: http://www.beanshell.org/docs.html
Hi Roger
DTO means Data Transfer Object. This is used to transfer data from one tier to another tier. i.e., Presentation Tier to Business Tier or Middle tier. Instead of sending each and every varible or filed value to server we will prepare one DTO and send it to Business tier. That will reduce network usage and improves performance of your application
DTO means Data Transfer Object. This is used to transfer data from one tier to another tier. i.e., Presentation Tier to Business Tier or Middle tier. Instead of sending each and every varible or filed value to server we will prepare one DTO and send it to Business tier. That will reduce network usage and improves performance of your application
Featured Post
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Convert websphere application server default chained Certificates from 1024 to 2048 keysize or higher size and also you can change signatureAlgorithm .
Please make sure Websphere Application Server fixpack 7.0.0.23 or Above. The following steps a…
Meet the world's only “Transparent Cloud™” from Superb Internet Corporation. Now, you can experience firsthand a cloud platform that consistently outperforms Amazon Web Services (AWS), IBM’s Softlayer, and Microsoft’s Azure when it comes to CPU and …
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Suggested Courses
Earn Certification
HTML5 Specialist - Certification
Free withPremium
Course of the Month6 days, 5 hours left to enroll
627 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.