Debugging Servlets

• Use print statements; run server on desktop
• Use Apache Log4J
• Integrated debugger in IDE
– Right-click in left margin in source to set breakpoint (Eclipse)
– R-click Tomcat and use “Debug” instead of “Start”
R click
Debug
Start
• Look at the HTML source
• Return error pages to the client
– Plan ahead for missing or malformed data
g
• Use the log file
– log(“message”) or log(“message”, Throwable)
• Separate the request and response data.
p
q
p
– Request: see EchoServer at http://www.coreservlets.com
– Response: see WebClient at http://www.coreservlets.com
• Make sure browser is not caching
– Internet Explorer: use Shift-RELOAD
– Firefox: use Control-RELOAD
• Stop and restart the server

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About lorddisk

WebCenter Content, WebCenter Portal, WebCenter Sites,Weblogic, Identity and Access Management (IAM),SSO,OAM,OIM,OAAM,OUD, OPAM,OID, OVD ,Oracle API Gateway ,OBIEE,OEDQ, Oracle ADF, Oracle SOA,J2EE, CackePHP ,PHP,J2SE,J2EE,Spring,Hibernate,JQuery,CSS,Java Script ,Joomla,Drupal,Worpress
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