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Its been a while since I used Java and persistence, but it was a great way to manage tables, queries, and objects.
I have an application that doesn't call for a full-blown database server (I want to share a database file on a cloud service like Google Drive with a few users, one of which will be doing most of the database updates) so I settled on SQLite.
I started with persistence (because that's what I remember) and immediately fell down a rabbit hole trying to get it to work with modern Java. I tried ormlite, but even their examples don't work out of the box. I don't mind fooling with them to get them to work, but I have to believe there is a modern database interface (like persistence or what ormlite appears to do) that works with Java, is current, and has some working examples.
Everything I find seems to be many years old :-(
Any suggestions?
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Currently we are working on an existing system that uses C# webserver interacting with OSGEO Mapguide and MS-SQL Server. Displays the map and layers in a JS client app using openlayers.
Mapguide is very slow and we'd like to run on Linux, so I am researching for how to do it using Java or Scala. I'd like to develop a GIS server using Java and client app using JS with openlayers (without mapguide). For now I don't mind wich DB to use (SQL or NoSQL).
Is there a 3rd-party that can help me? An example perhaps.
If you prefer java based GIS system, the GeoServer which is written in Java would be one of the best choice you can have. It supports various of DB and use OGC WMS as its output and it runs fast at least for me. This works with OL3 naturally and there are many examples from the large user community and detailed tutorials that you can find online. Good luck!
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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
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I'm starting some new code aiming Mysql and Oracle, plus H2 for in memory testing. This code has then to be deployed on our customer's sites.
Since it'll evolve over time, I'm planning to use flywaydb.org java migration, however I haven't found any java/jvm library allowing me to declare/alter tables and query/insert them through typesafe code for the required DBs.
Any hint of a library doing so?
My investigation so far:
Hibernate doesn't support migration & programmatic creation/alter of
table (just startup time create/update options, which are way less
powerful)
querydsl doesn't support table creation/alter
typesafe's slick required paid support for oracle
I would have to have to fallback to plain old SQL written 3 times...
best
Turns out http://www.jooq.org/ does it, jooq's motto being to provide all SQL functionalities in Java through a DSL and in a cross database way. Really sweet :)
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My requirement is to access moodle as a backend engine and front end will be mint in Java[jsf]
now I want to know that is there any interface available to access Moodle from Java , using WebServices or any APIs or anything.
Initially I tried using Sakai which is in Java, but the problem is there is no clear API written for it.
So let me know the option for using Moodle from JAVA.
Also if it is possible than what will be the feature available through the WebServices or API. ?
Or any other LMS that is in Java and provide API or WebService to make this working.
I reviewed many LMS (dokeos, docebo, ATutor) last year and to be frank all of them sucked. Moodle was the most stable, had more plugins and a huge community.
I came across Project Sakai, I havn't tried it, but sounds promising. Something very interesting from Google is cloudcourse (in python I guess, but looks awesome demo). But not a complete LMS (compared to moodle).
You forgot to add Chamilo they have a list of available web services (SOAP) that you can use to create courses, users, add users to courses, etc
https://www.olat.org/ and https://www.openolat.com seem a good alternative to moodle.
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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.