Servlet Example Error - with birt runtime 4.2.1 - HTTP Status 500

hi all, 
 
I'm working on the DynamicReport Example : <a class='bbc_url' href='http://wiki.eclipse.org/Java_-_Dynamic_Report_Servlet_(BIRT)'>http://wiki.eclipse.org/Java_-_Dynamic_Report_Servlet_(BIRT)</a> which throws an error: 
 
HTTP Status 500 - 
 
description: The server encountered an internal error that prevented it from fulfilling this request. 
 
exception: 
java.lang.NullPointerException 
BirtEngine.getBirtEngine(BirtEngine.java:81) 
WebReport.doGet(WebReport.java:66) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:617) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
 
This is my folder structure underneath the Tomcat folder: 
 
webapps 
__->DynamicReport 
____->Reports 
______->DynamicTableExample.rpttemplate 
____->WEB-INF 
______->lib 
______->platform 
______->web.xml 
____->Dynamic.html 
 
These are my points I did to run the example: 
 
1. Created a a DynamicReport/WEB-INF/lib underneath the Tomcat webapps directory 
2. Copied all the jars in the birt-runtime-4_2_1/ReportEngine/lib into my DynamicReport/WEB-INF/lib 
3. Created a director named platform in my WEB-INF folder 
4. Copied from my BIRT All in one Designer Package eclipse-reporting-juno-SR1-win32-x86_64/eclipse/configuration and eclipse-reporting-juno-SR1-win32-x86_64/eclipse/plugin 
5. Created a Java Projec which includes the BirtEngine.java , DynamicReport.java and BirtConfig.properties 
6. Added all external jars from birt-runtime-4_2_1/ReportEngine/lib to my Java Project + the serlvet-api.jar from the Tomcat libary 
7. Exported my Project as an Jar file to DynamicReport/WEB-INF/lib 
8. Created the web.xml and placed it in DynamicReport/WEB-INF 
9. Created trhe Dynamic.html and placed it in the DynamicReport folder 
10. started tomcat 7.0.34 
11. Called Dynamic.html 
 
I Use: 
birt runtime 4.2.1 
tomcat 7.0.34 
 
Thanks guys and Cheers!

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Comments

CBR

Hi,

the steps you mentioned will not lead to a valid BIRT installation!
The designer package is for graphical editing of your reports. It will not run in any servlet container.

What you need to do is:
1) Download the birt runtime (e.g. for 4.2.1: http://www.eclipse.org/downloads/download.php?file=/birt/downloads/drops/R-R1-4_2_1-201209181113/birt-runtime-4_2_1.zip)
2) unzip the content to any directory.
3) copy the whole WEB-INF directory to your own WEB-INF
4) replace web.xml with your web.xml

do 5-11

Warning:
This is ok for just some testing purposes (aka quick and very very dirty solution). I would rather not build an webapp like that if it is used in a production environment.
If you want to build a webapp better use eclipse, add everything you need using your development tool. Test it and package it as a war file. In addition the servlet-api is just a compile time dependency. If you run your class within a servlet container it will use the servlet containers servlet-api. Adding it to your webapp will (probably) not cause any harm but is bad practice.

Samo

Hi cbrell,

Thanks a lot! It works now!
Nice to get the additional Information.
Right now I'm just trying sth. quick as you said.
But I will consider it for the future.

Cheers,
Samo