Can someone point me a good step-by-step tutorial to consuming an already running web service in java?
PS: I tried creating the classes with wsconsume, but it cries with
[ERROR] rpc/encoded wsdls are not supported in JAXWS 2.0. (my web service is rpc/encoded)
If I can consume web services entirely by hand (using no wizards), and understand how is it working, then I'll be happy.
Thanks!
Update: I have found out that rpc web services are not consumed using jbossws, but jboss-jaxrpc, which implements the JAX-RPC specification. I've found a guide for JAX-RPC here, but I'm still looking for other guides that could help.
Apache CXF is the easiest way to get webservices running. Specifically look at the Simple Frontend. The simple front end uses reflection to convert the method/data types to a webservice. It doesn't get much easier than that.
CXF is pretty stable, but does not include all the WS specifications (WS-Eventing for example).
How about the JBossWS website? The details on the client side wsconsume tool are probally what you will look at first.
If you have the WSDL and XSD files, you can use the Axis web-services library to create Java classes that will interact with the services they describe. From the stand-point of this library, you are creating a client application.
You can also consume web services with Spring WS.
Related
I know that CXF does not support the rpc/encoded WSDL style and I am looking for a solution to get the way around this. I have to do the implementation of rpc/encoded style web service, the problem is that the service has to be deployed in Apache Karaf 2.2.9 as an OSGi bundle which uses CXF 2.6.2 and there is no way I can implement the rpc/encoded ws.
What I am thinking is to create another web service, which will be running on a different container and would be generated with Axis 1.4. It would work as a wrapper for CXF web service which is deployed into Karaf.
I don't really like this solution, because there has to be another container involved. Maybe someone can suggest me the solution how to make this work without other container? (If it is possible at least).
Glen has a tutorial for that:
http://www.jroller.com/gmazza/entry/calling_rpc_encoded_web_services
but it really isn't that straight forward.
I am new to web services and below I am sharing my understanding so far by reading on net:
Apache Axis and Apache CXF - are web services frameworks used to develop Java web services.
JAX-RS - Java API to develop Restful web services.
JAX-WS - Java API to develop SOAP web services.
Is the above correct? Or if you want to add something to it.
In my project, I am going to use web services with Spring framework.I am told that project will have both SOAP and RESTful web services.I am very much new to this.
Can somebody please guide me in this regard by sharing some valuable information or any good link which will make me understand better?
Your statements are correct, but it's not clear whether you've understood one crucial fact: CXF and Axis are both implementations of the JAX-WS standard. CXF additionally implements JAX-RS, and there are some libraries that only implement JAX-RS, such as Jersey (Oracle's reference implementation) and RESTEasy from JBoss.
For your project, the big question is whether you will only consume those webservices, or also publish them. If you need to publish a webservice, you'll have to include the entire implementation library and learn to use it. If you only consume the services, you'll just need some generated client and data binding classes.
Another question is whether your RESTful services will talk XML or JSON (SOAP always uses XML), as you'll need a parser or binding framework for JSON (JAX-B for XML is included in recent JDKs).
I am in the process of writing a JSON based web service. The service will accept two types of requests: commands (e.g. createOrder) and queries (e.g. getOrders). Each request needs to send user credentials (username/password) for authentication (perhaps in HTTP headers). The service needs to be implemented in Java.
Which frameworks would you recommend for this use case? The very basic stack that I am thinking of is servlets backed by a JSON framework like Jackson. Are they any other frameworks that you would recommend and why? There is no need or desire to make the service RESTful, however smooth integration with Java EE 6 or Spring would be a plus.
Thanks in advance for your time.
Can I then interest you in RESTful Web Services (which is a JAX-RS API)? A library that implements JAX-RS is Jersey, Apache CXF, which is suited to allow JSON Web Service.
A related StackOverflow Post which shows REST clients that conforms to JAX-RS.
You should take a look at spring mvc and read this blog post which cover using spring mvc for restful WS.
Play! Framework would definitely fit your bill. It is not servlet-based but fulfills all of your requirements. Plus development with Play is very fast, you can get a prototype up and running in no time.
I personally use Apache CXF, with JAX-RS and jackson libraries. They are easy to implement and integration is dead easy. JAX-RS is a java standard, Jackson library is fast and handles circular references and Apache CXF needs only a couple of lines of configuration to setup and start running. Go for it!
An Open-Source Services Framework From Apache
-CXF has been designed to provide a pluggable architecture that supports not only XML but also non-XML type bindings, such as JSON and CORBA, in combination with any type of transport.
-Java EE integration: deploy services in Java EE application servers such as Apache Geronimo, JOnAS, Redhat JBoss, OC4J, Oracle WebLogic, and IBM WebSphere
-Standalone Java client/server
I'm trying to create a simple web service application where I can retrieve a collection of strings and store them into a data store on the AppEngine server.
I have knowledge in Java and barely any knowledge of Java Servlets and its WAR standards.
I would like to at least have some direction on how to create a web service using the Java technology AppEngine provides. I've searched but the articles are sparse and too lengthy while not providing any simple solutions.
I'd love it if I can create a web service using Java's annotations just like you can do in .NET with attributes.
I'd appreciate links to articles and guidance a full source answer is not required but would be appreciated.
No python based answers please.
IMO, there is no simple solution to build a Web Service on GAE with Java.
But, it's still achievable. Let's start with the Web Services we want to build.
In common usage the term refers to
clients and servers that communicate
over the Hypertext Transfer Protocol
(HTTP) protocol used on the web. Such
services tend to fall into one of two
camps: Big Web Services and
RESTful Web Services.
"Big Web Services" use SOAP/RPC format and RESTful Web Services use REST style one. You can read more about SOAP vs REST.
There are lots of Java open source Web Services frameworks out there. Most of them are generally based on the Java API for XML Web Services (JAX-WS), part of the Java EE platform.
JAX-WS is not supported by Google App Engine as specified in the list Will it play in App Engine. So forget about the "cool Java's annotations".
But, Restlet seems compatible with GAE. So if you think REST could be an option for you, I would go ahead and take a look at the Hello World tutorial of Restlet. Then, I'd go ahead and read the article on how to integrate Restlet with GAE.
I'm tasked with creating a Java Web Service for a .NET 2.0 client to consume.
What would your suggestions for the implementation be?
The solution doesn't need to be very heavyweight (don't need a full Java EE container I believe) but what do you think is the best solution for this? I have thought about using Glassfish v2 with JAX-WS annotations (#WebService), and JAXB XML Bindings(e.g. #XmlElement), which I assume the .NET client would be able to consume?
Has anyone tried this scenario?
Would Glassfish be overkill though, since I'm merely using the Web Service as a mechanism for .NET on Windows to communicate to the Linux box, the underlying application is extremely small.
Any suggestions are more than welcome :)
Thanks,
James
P.S. Other notes - would you use Axis/CXF instead of Glassfish? Would you use a servlet container such as Tomcat? etc.
I have used Axis2 and it works.
I had the same problem of making Data Exposing API (Web Service in my case) in Java.
I made the web service using Axis2 and Spring (to access database) and the WSDL created via Axis2 was easily consumed via ASP.NET Application via its Add Web Service Dialog Box and the corresponding Proxy Classes were created easily.