Servlets made easy. Write once and run everywhere

Let’s serve your dataFrank van der Linden

About me• Freelance Java and front end developer

• Owner of Elstar IT

• Try to do some running and mountain biking

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Roadmap• Theory

• Prepare

• Set up

• Develop

• Test

• Deploy

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Theory

What is a servlet• Java program to extends the capabilities of a server

• Servlets provide a component-based, platform-independent method for building Web-based applications

• Servlets run in web containers, Servlet containers

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Structure and architecture

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Lifecycle

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XAgent - a sort of servlet

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Servlet in NSF• excellent series of Eric McCormick

• https://edm00se.io/servlet-series/

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Servlet as OSGi plugin• run server wide

• Code can be shared with other processes like DOTS, XPages.

• With small changes, it run also on other Java servers, like Tomcat, WildFly(a.k.a. Boss) and Websphere

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OSGi architecture

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Prepare

Prepare• Download IDE e.g. Eclipse JEE

• Set Target platform

• Install PDE Debug plugin

• Create com.ibm.notes.java.api project

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*See Appendix A for steps to prepare your IDE

Develop

goals• Create a Shared code plugin

• Create a web app plugin which runs on a Java server

• Create a OSGi servlet which run on a Domino server

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* See Appendix B for setup projects

my goals

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Shared plugin

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Domino - Servlet

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Web app - Servlet

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show some code

Logging• Build in via java.util.logging.Logger

• Log an error to the console….

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Logging• ….log to a file, by adding a (File) handler

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Test

Test

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Test

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Test

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Test

• tell http quit

• load http

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Warning• After testing remove the pre.launch.ini from your workspace

directory of the Domino server

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Deploy

Deploy• 2 ways of deployment to Domino

• as deployable jar

• as an update site.

• Add to web server

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As deployable jar• Export as deployable plugin…

• Put the jar in the correct directory on the server

• tell http quit —> load http

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As update site• Create Feature project, add plugin projects

• Create Update site project, add Feature project

• Add update site to update site database

• tell http quit —> load http

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Deploy to web app

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let’s deploy it

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Thank you

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https://bitbucket.org/flinden68/lets-serve-your-data

Appendix A

Target platform

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Target platform

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Target platform

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PDE plugin

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PDE plugin

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PDE plugin

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com.ibm.notes.java.api

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Appendix B

OSGi Plugin set up

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OSGi Plugin set up (servlet)

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OSGi Plugin set up (servlet)

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OSGi Plugin set up (servlet)

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Web app set up

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