Is it possible to implement a program written in Java on a website coded using Ruby? Currently developing a website where data from a form must be taken in, parsed, and used to fill out objects in the application. Currently a Java Programmer which is why using Java to develop the application would be much easier. However, Ruby is similar enough that it will work if need be.
I know that there are applications such as JRuby that allow Ruby to be used in Java. Is the reverse true, and if so, how does it work?
JRuby allows you to call Java from Ruby as well: https://github.com/jruby/jruby/wiki/CallingJavaFromJRuby
Before going this route, if you prefer to write your web application in Java (you mentioned that you are more comfortable with Java), why not use Spring Boot? Spring Boot lets you develop with minimal setup like Ruby on Rails.
You can go the jRuby way and mix Ruby and Java and yes it wors in both directions.
See this wiki for examples and how to.
CallingJavaFromJRuby
In theory you can call a java Jar and catch the results in Ruby but for a website I advise against it.
You could present the Java functionality as a webservice but you could program the whole thing in Java or Ruby also.
Related
I have a complete and pure Java project (GUI game) which I want to run it on my website.
What is the best to do without creating the whole java project from scratch or is there any technologies I can use to embedded my java project on my website.
I know it became more difficult to do this as most broswer do not support java anymore. I know there is a way to do using Java Web Application using Apache Tomcat, but I do not want to do route. I am trying to find more easier and better to solution to this
Thank you
Unfortunately, It is quite possible that you need to rewrite some parts of your application. Mainly because it is a different language (I assume SWING, AWT, or another Java-based library, but you could tell more about your project and used libraries).
There is usually two parts of a game/application (super simplified):
backend,
frontend,
I am quite sure you can use most of your backend code. But the frontend probably needs to be rewritten. It is even better if you loosely coupled those two parts meaning there is no code in the backend for the frontend because you will have a harder time now breaking it down.
For example, you could check Vaadin and see what you could use from there to refactor your GUI application to be work on a plain browser.
Vaadin basically lets you write only or MOSTLY Java code and still create a website, webpage.
Good luck!
p.s: Next time I recommend you (if you wanna publish it to a different platform) a cross-platform language, you write once and you can run it publish it on multiple platforms.
As I've recently started using JRuby, more specifically building Java applications using Ruby code, I've started using Java Libraries such as LWJGL and Slick.
I know JRuby changes Java method names to a more ruby-esque structure, my question is, is there any current way to generate Ruby documentation, either from source or by conversion of current documentation or even based on what JRuby exposes the methods themselves as?
At some point when JRuby 1.6.7 is out I plan on cleaning this really rough project for just such a thing:
https://github.com/enebo/noridoc
The intention is it will weave both Java and Ruby syntax together and give reasonable documentation for a Rubyist wanting to know all Ruby methods. In it's current form you should be able to generate a reasonable set of HTML docs of Java code showing you all ruby aliased methods. You will need to screw around with the javadoc comment.
Oh and we plan on making this tool available out of the box in JRuby once it is good enough to merge.
I am currently developing a search engine and I have some implemented algorithms that are written in Java but also I need to get some Database communication which is easy thing in Ruby an Rails. Thus, Is there any way to use both language in the web application development
Regards :)
Easily. You can run Ruby on top of the JVM by using JRuby, or you can have Ruby communicate with Java by using RJB (Ruby-Java Bridge). Or you could reimplement the algorithms in Ruby.
Sounds like JRuby is the sort of thing you're looking for, although I haven't (yet) used it myself.
JRuby with Rails - including guides for Rails 3
https://github.com/jruby/jruby/wiki/JRubyOnRails
Making Java calls
https://github.com/jruby/jruby/wiki/CallingJavaFromJRuby
I'd rather not "reinvent the wheel" and I've found a Ruby project that provides functionality I need in my Java app (there is no preexisting Java project that does what I need - trust me, I've looked). So, best case scenario, I am able to run the Ruby code from my Java code (ala JSR223).
However, this Ruby project depends on having several gems installed. I'm not at all interested in converting the entire Java app into a JRuby app, but I'd like to be able to leverage this project. Is there an easy way to load the code from a gem into a ScriptEngine, or am I just asking for headaches?
JRuby is a solid platform and integrates well with Java. But Rubygems do not integrate so well with Java build tools.
If any of the gems include native C code, then forget it, you can't use them from JRuby.
If all the gems (and all their dependencies) are pure Ruby, it is technically possible to use them from JRuby, but you will have headaches getting them packaged in JARs so that the JRuby runtime can find them.
Mostly I'd say no because of complexity. Although it's subjective, I'd personally rather take the time to re-write it anyway--you can make improvements and when you're done, you'll understand it better.
One option you might consider is splitting your application into two pieces, which interact using either something like pipes/files (or simply stdin and stdout) or some sort of an RPC mechanism. Whether an approach like this makes sense really depends on what the Ruby library does - creating the interface between the two applications might be more complex than actually reimplementing the stuff in Java.
I've reused Java code from JRuby, I don't see why this can't go both ways.
Another thought, can you run the Ruby code and then just tack on a web service or set of web services to call from the Java app? Sinatra makes it ridiculously simple to write a web service wrapper for ruby code. And Java has no shortage of tools to call Web Services.
i am currently using php as backend language in webdevelopment. but im wondering what you need to install to get running with python and java.
with php i need apache and mysql.
can i use those for java and python too?
i cant find good guides equivalent to LAMP/MAMP/WAMP so i understand the parts when using either java or python. would be great if you could give me some good links on the installation and what is required.
and i have read that its easier with python. but is this the only advantage of using python instead of java. cause with java i can create java applets, desktop and mobile applications. they all tend to have java installed. but not python.
so why should i use python instead of java.
I can only give suggestions for web development in python:
Use Tornado - A non blocking web server.
Use Jinja2 - A templating engine.
Use MongoDB - A schema less database server | You can also use any RDBMS according to your requirement.
Above 3 tools are enough to build a web application in python.
or you can always choose Django - The giant web framework with all the features required to build a scalable web application in python.
You need to look into the Web Application Framework subject. Some SO pointers:
simple-webserver-or-web-testing-framework
web-application-frameworks-c-vs-python
django-vs-other-python-web-frameworks
what-web-application-framework-for-java-is-recommended
can-anyone-recommend-a-simple-java-web-app-framework
...
Good luck.
web2py is a python web framework that is completely self-contained, runs portably off a USB drive even. The manual is available on scribd, and after an hour or two of tutorial you will have a pretty good idea of what a python web framework will be like. I can't comment on Java at all.
EDIT: Django and web2py are very, very similar. I think I prefer web2py because it does more for me that I don't have to do, but from the POV of, say, Java frameworks, Django and web2py may as well be the same thing.