Port a Tomcat Application to App Engine [closed] - java

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I have a tomcat/mysql website that I would like to move over to Google app engine does anyone know of a good tutorial outlining this? Or can anyone make some suggestions on how to do this?

As long as you use standard servlet and JSPs you will be fine.
The limitations for Google App Engine are documented here : http://code.google.com/appengine/docs/java/jrewhitelist.html
Sessions are kind of expensive (read slow) so avoid state on the server as much as possible.
The backing store is also quite different than standard SQL if you use any db calls in your app.

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Database suggestion for chat app Java [closed]

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I am building p2p Chat in Java and I need a DB for accounts, friendlists and whoIsOnline. My idea is to create a server, which is receiving periodicly KeepAlive messages and updates whoIsOnline list, then sends back to clients this list only for their friendlists. Any suggestion what DB should I use?
MySQL is quite easy to learn. You find much tutorials for begginers in MySQL.
Here is a small example of creating the database and using the databse in java.
http://www.vogella.com/tutorials/MySQLJava/article.html
I never had any problem with it and have done a lot with it.
Setting up a MySQL Server on your Server is also very well documented. Just search for it and you will find what fits you

Difficulties in java web programming [closed]

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Hello to all please I need help, I am very versed with java but I have this project I am working on that needs java web programming skills. I have to establish a platform for web development in java. That already done I have to test if the platform is suitable for bot static and dynamic web applications in java.This is my point of difficulty now for the test
There are plenty of tutorials. I have found these ones by Oracle to be the best. They assume you know very little java and work there way up to the complex stuff.
With out knowing what your project it is very hard to give you specific information.
http://docs.oracle.com/javase/tutorial/tutorialLearningPaths.html

Regarding Hosting Java application without dedicated Server [closed]

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my question is that......
I want to host my content management system without java dedicated server,Because of high Cost of java server.And what framework is beneficial for me to make content management system in java......
Help please,Thank you from my side.
You can always try amazon web services for hosting:
AWS
Grails is built on groovy and provides you with features like scaffolding. Groovy is an extension of java and relatively easy and fun to use. See these official sites for groovy and grails and this SO post for more info:
Stackoverflow
Groovy
Grails
Ultimately not a definite answer, but rather just some suggestions

FREE Mockup Tool for Web Applications? [closed]

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what is the best FREE mockup tool for web applications?
I know balsamiq, which is really nice, but lacks the feature of linking different pages together.
I would like to do some kind of prototyping, so not just mocking a view, but also providing interaction between the mockups.
Which tool could I start with?
I think exhibit from mit csail is a good choice.
http://simile-widgets.org/exhibit/
You can load your data from javascript and simulate interaction with jquery and/or passing actions through URL parameters.

Do you know a user management project in Java? [closed]

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I'm looking for a lightweight and easy to install user management system made in JAVA. It should use a free Database System (MySQL for example) and handle basic security after logging (access or not with error message). I'm not looking for anything fancy/flexible like SpringSecurity.
Thank you!
I think OpenLdap would meet your requirements although not written in java, but which db other then derby is written in java?
Here is a tutorial how you access it using JNDI.

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