Where can I find good Java web services practicals and tutorials (I'm a newbe to JWS so I prefer from the scratch).
Thanks.
Try the Sun Tutorial. These are usually very good
I've always read (though I've never followed) the Sun tutorials. Well written enough for me.
Though, I would suggest to use a framework like CXF or spring web services to avoid the boilerplate.
I used this when learning sth. about web services.
But I'm sure now there are newer ones.
I second the vote for Spring web services. One advantage is that your services can migrate from stack to stack without modification. If you're already using Spring, it's a great way to go.
Related
Some years ago I made a Swing application that uses a MySQL database. Now I must change this app to work through Internet.
I can connect directly to a MySQL server through Internet, but I think that it's insecure, so I'm thinking about using webservices.
I know I must change lots of code in my current application, and I don't worry about that. But my problem is that I have never used webservices nor server side technologies in Java, and I don't know where to start.
Do you know any good "webservices for dummies" tutorial? I need authentication (and ACL or similar) and database access.
Thank you!
Easiest adaptation: have a look at apache axis2, it has everything you need for webservices. That would offer to extend you current applicatino by webservices functionality.
If you need to re-engineer everything, either spring or Java EE should be your friend.
Adding web services won't make it any more secure. The best you can do is to enable SSL with JDBC.
Take a look at the core servlets site. There is an EJB tutorial and an AXIS tutorial. As mentioned by Andreas_D, spring and Java EE are both options. I suspect you want a simple REST implementation, in which case, spring is a good option.
Which is a good java REST framework?
I would like it to be deployed with Tomcat 6.
Also you can try Spring Framework 3.x.x.
You can try RESTEasy. It isn't application server dependent. (Doesn't require an AS at all).
You can also try an alternative, but you really should use a JAX-RS implementation :
Jersey
Restlet
Wink
See my answer on: RESTFul Web Development with Java EE 6:
I'd recommend you have a look at:
RESTLet
Play
Grails with the REST plugin for Grails
Jersey
RestEasy
(One question though: why specifically
do you need to be able to integrate
with Java EE?)
EDIT: In the case where you absolutely
want to use the Java EE APIs, then as
mentioned by BalusC, JAX-RS is
your solution of choice. Restlet and
Jersey both support it. I don't know
about RESTEasy, but the JAX-RS
Wikipedia page mentions it does.
AFAIK, Jersey is the JAX-RS reference implementation. I've used it several times for REST webservice servers.
Minimal configuration, wide use of Annotations
Runs in Tomcat, Grizzly, GlassFish and many others...
The best part, the Jersey Test Framework makes it really easy to completely test your service.
I've had a pretty good experience with Jersey. It's pretty easy to integrate it with Tomcat.
I have had good experiences with Restlet: http://www.restlet.org/
Here is a tutorial on running Restlet in Tomcat: http://danilogurovich.wordpress.com/2008/09/23/a-simple-restlet-demo-application/
Here's the best and easiest: http://sparkjava.com/, it works standalone. And here is how http://sparkjava.com/documentation.html#other-webserver to make it work within a server.
http://www.crnk.io/ might also be of interest. Unlike the other libraries here, it can be considered to be a native resource-oriented library and along the way offers various higher-level features like sorting, paging, inclusions, bulk-updates, etc. out-of-the-box.
Play! framework is very good, also more easier than Jersey. You can use with or without tomcat.
I was thinking which framework would be a good choice to go into. I'm focusing on java apps and tested spring, grails and seam so far. I've also looked aboard java and gave ruby on rails a try too.
In future I will be focusing on portlet development which I've gone through already without a complete framework (just hibernate).
Maybe someone could share some experiences? Or point me to a corner which I don't looked in so far?
Regards and thanks for reading ;)
If you're doing this out of curiosity and to learn something new, rather than to meet specific requirements for a specific project, maybe you'll enjoy the Play! Framework. It contains a lot of stuff from other frameworks and is designed to get you up and going very quickly, with short development cycles and not a lot of arcanae.
Their stated purpose is to be "by Web developers for Web developers". They intend to put the fun back into Web programming.
This sounds good and I've read a few nice things about it in fora and blogs, but I haven't tried it myself yet so that's all the recommendation I can give.
Grails has a plugin for developing portlets, described here.
If you consider Groovy or Grail, you might consider ZK, too. It is an Ajax framework integrated well with Groovy and Grail.
I'd say you go with a framework that targets the programming language you're most proficient in. If you already are good in Java, and you're a quick learner ( to learn Groovy ), Grails could be a good choice.
If you'd like to go with another scripting language, say Ruby/Python, then choose Rails or Django, or Pylons ( the list could go on here ).
If you're going for a Java only framework, I'd go with Spring MVC.
You should have a look at the play framework (SO question).
Finally a Java framework made by Web developers. Discover a clean alternative to bloated enterprise Java stacks. Play focuses on developer productivity and targets RESTful architectures.
I was thinking which framework would be a good choice to go into. I'm focusing on java apps and tested spring, grails and seam so far. I've also looked aboard java and gave ruby on rails a try too.
FYI - Grails is using Spring and Hibernate underneath; SEAM uses JSF and Hibernate.
Grails is the Java equivalent of RoR. It's based on the same idea: "convention over configuration".
It's also important to be clear that Spring is far more than a mere web MVC framework. It's based on DI and AOP and encompasses persistence, remoting, enterprise services, etc. It supports portlet MVC, which is a plus given your requirements.
Personally, I would recommend straight Spring over any of your choices so far if you stick with Java. It's important to know something about what's going on under the covers. If you know Spring well, Grails will be easy.
I'd use Wicket rather than Play! because Play! requires Python as a semi-dependency. With Wicket, you only need Apache and Java and thats it.
I suggest you also check out here:
http://gokhan.ozar.net/best-java-web-frameworks/
I have pretty big background of .net, and I've decided that i want to port one of my websites to Java. (now with the asp.net MVC craze, I've figured I'd better learn a more mature approach to MVC).
i've downloaded eclipse (easyeclipse distro to be exact, and am ready and willing to develop my first website in java).
i've programmed j2me application before, so i know the language and some of the framework.
can someone guide me? any advice?
Although I'm not very aware of "asp.net mvc" is all about, I would suggest you to take a look at Spring it may be interesting.
Probably is too complicated at the beginning but when you get the concept it turns out very easy to follow.
Spring has 5 core modules ( which I don't remember exactly ) but they were like:
AOP
ORM
MVC
Core
( some other I'm missing here )
The MVC part uses a lot of annotations to make life easier. There's a very big community around Spring.
Here's an introductory article about spring.
Java has a ton of frameworks you can choose from. The technology stack that I use for my Java development is either:
Spring for IoC.
Hibernate for the data layer.
Struts2 for the MVC framework.
I have also swapped out spring and used Guice for the IoC.
Spring also has MVC, but I tend to like Struts2 better.
I'd recommend looking at Grails, it lets you become comfortable with all the java libraries and frameworks like Spring, SpringMVC, Hibernate, SiteMesh, and so on but gives you a much better DSL for web applications and much more concise code with the Groovy language (think of it as Java with dynamic typing, blocks, closures, and so on).
If you'd rather stick to pure Java I'd recommend looking at the Stripes framework and the following book:
http://pragprog.com/titles/fdstr/stripes
If you interested in web applications specifically, I would recommend using MyEclipse http://www.myeclipseide.com. Basically, this is a version of eclipse with all the web server integration and functionality built in. I've been using it for a few years and it's much easier to develop with than with plain vanilla eclipse. Depending on how much your going to use it, you have to decide whether the $55 annual subscription is worth it for you.
I'm a little confused. does spring framework actually a full blown framework? doesn't Java already have a framework? (by framework i mean all those misc libraries).
We need to add WorkFlow to our Spring managed application. Does anyone have any useful experience in using any of the myriad of OSS Work Flow solutions? Which one is best? Which one integrates with Spring best? Which ones should we avoid?
If you only need some simple process orchestration, Spring's own Web Flow, despite its name can serve as a orchestration task manager. If you need to preserve state for several days then you will need to become an 'early adopter' of one of the open-source projects. You may want to look at Eclipse's BPEL project.
My hunch is that once a clearer picture of the BPEL/BPM/Workflow space emerges you will see Spring provide an abstraction layer the same way they have for JDBC, Transactions, ORM frameworks etc...
Like Brian said if you're doing anything of great complexity you might look at using BPEL.
There are a number of open source BPEL engines, one that comes to mind is Apache Orchestration Director Engine
I second Spring Web Flow. Depending on how complex the process is, Web Flow is great for managing various states and I've found that it's pretty easy to pick up and there's a good amount of documentation out there for it.
ActiveVOS is by far the best BPEL engine in my opinion. Download the evaluation version and give it a go. JBoss have even adopted their open source offering.
We're looking at Drools/Guvnor, possibly integrated with jBPM (as in this presentation), to add a workflow engine to our Spring/Java EE app, but we're still in the very early phases of trying it out.