What is java web services?

Hi all,
I would like to know what is java web services?What can be done using java webservices?
I just go through the link
http://java.sun.com/webservices/docs/1.6/tutorial/doc/index.html but i couldnt able to get an idea what is web services is?

makpandian wrote:
It describes about web services in common .I want to know what web service is in java platform..
Thanking You.That is a slightly odd question.
There's nothing special about web services in Java against web services in any other language...there are, after all, several web service frameworks in Java, so it's not as if there's even a single answer to it.
Do you understand what a web service is and the associated standards around one? If you do then you should realise that your question doesn't make much sense...unless you're actually asking what ws packages there are around.

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Using Jdeveloper 11.1.1.3.0 on Linux.
Thanks.

These links may helpful for you.
http://download.oracle.com/docs/cd/E14004_01/books/SSDev/SSDev_CustomizingModel22.html
http://download.oracle.com/docs/cd/B31017_01/core.1013/b28764/web_services003.htm

Generation Error - when trying to publish a Java web service

Hi All,
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Without going into any technical discussion about the code, my first question is what JDK version was used to create this which was imported into the form? Understand that Forms 10 runs on JDK 1.4.2, so if you used any newer JDK version, likely there will be problems.

The Best Java Web Services Technology for Developing Web Services

Hi,
I am new to Web services world.
I read the java web services page . there are more than 6 technologies.
JAX-WS,
JAX-RPC,
JAXB,
SAAJ,
JAXP,
WSIT,
XWS-Security
I went through several documents on web services.
I could not get a clear idea of which technolgy to use.
Which Java web service technology will be the best to develop web services independant of language, platform.
or is there any 3rd party implemetations available ? for rapid development of web services.
Could anyone help me !.
Thanks in advance.
Message was edited by:
Siva.Prakash

Which Java web service technology will be the best
to develop web services independant of language,
platform.
Java by nature is a cross-platform language, so if your focus is on the need for portability, the choisce of WS should not be a problem. However, each WS is best suited for paricular uses.
SAAJ, a low-level level API, offers much simplicity, but is not the first choice for programmers, as SOAP (Simple Object Access Protocol)messages need to be constructed piece by piece, making it a quite arduous code to program.
If you are not familiar with XML, your best bet would be to use JAX-RPC (Java API for XML-Remote Procedure Calls), as it hides the underlying detail from the programmer, in terms of SOAP and XML. The shortcoming with RPC-based WS is that it is "restricted to the local programming experience". Another failing is that assumes there is a network path- a reliability concern.
If your program will be contacting other services during downtimes, unlike JAX-RPC, JAXM is quite useful. However, your listing did not mention it, so I wont cover it.
JAXR is a client-side only API that acts as an interface between registries (not referring to JAXP)
I am not famiiar with JAXB, JAXP, WSIT or XWS-Security..
or is there any 3rd party implemetations available ?It depends on what platform you are used to. Assuming you are familiarized with the J2EE platform (now changed to Java EE SDK), the NetBeans IDE (either 5.5, 5.5.1 or the latest editiion) is quite useful. I am using 5.5.1, but have found that it is quite buggy, especially when adding WS operations, a core requirement of a WS. if you will be using to devlop a service for an immediate need, you may find the learning curve to be a bit high, in terms of getting to grips with how to use it. (Download link:
http://www.netbeans.info/downloads/index.php)
The IBM Autonomic IDE (or AIDE), based on the WSDM standard, includes 3 sub-tools, icluding the IBM Manageability Endpoint Builder which, according to their website, allows individuals to build endpoints to allow manageability interface exposure; Manageable Resource Browser and the IBM Manageability Endpoint Simulator. However, I'm not familiar with this IDE. (Download link: http://www.alphaworks.ibm.com/tech/aide/download)
The .NET Framework uses the Visual Studio IDE. For an unbiased comparison of J2EE and the .NET Framework in terms of WS, see http://www.webservicesarchitect.com/content/articles/hanson01.asp.
Apache Axis2, Geronimo and JiBX allows fast development of WS, or so the creators profess.
The PHP environment- you could try NuSPHERE PHPed. According to one website, with it you can develop a web service in under an hour.
I hope this was useful to you.
[Based partly on Topley, K. (2003) [i]Java TM Web Services in a Nutshell: A desktop Quick Reference. 1st ed. California: O�Reilly & Associates, Inc]

Handling Java Web Service Exception in ABAP

Hi
I have created a web service in Java using NWDS.
Which has a businessMethod which throws a Exception based on certain business logic.
I have consumed this Web Service Method using .NET Client.
i am able to catch the Exception and get the Exceltion Message.
But when i try to consume the same web service Method in ABAP,
i am not getting the Exception Message .
The Method call works fine.
What am i missing here ?
regards
Rajendra

Hi,
Upon further investigation and comparison of the custom exception object (generated during consumer proxy creation for a CUSTOM web service) with a standard exception object(generated during consumer proxy creation for a STANDARD web service) I found that the sub-elements of the exception structure errorPart are not available in the custom exception object (and one of these sub-elements is the message text).
Call Stack,ExceptionName and MessageText Elements are missing in the errorPart node of Exception
Node. as seen in the ABAP Exception structure generated.
Queries:
1. Are there any standards which need to be followed when coding exceptions in the Java web service for consumption in ABAP such that all sub-elements of the exception object are also created in ABAP during the proxy creation?
2. Can we get the Java code for a standard web service available in SAP Netweaver? Asking the same as the exception object created for the standard web service RoomABAPWS contains the sub-elements. Getting the Java code of the same will be very helpful in resolving the issue.
Regards
Rajendra

When to use Java Web Service from WSDL, Webservice proxy, Web Service DataControl -- JDeveloper 11.1.1.7

Hi Experts!
I am having confusion among these 3 services provided in Oracle ADF. When to use and what service needs to be used?
Once we generate Webservice WSDL. With the WSDL we have 3 options in Jdeveloper to invoke this service.
1. Java Web Service From WSDL.
2. Web Service proxy,
3. Web Service Data Control.
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Please give me your valuable inputs.
Thanks & Regards,
Guravaiah Tata.

Hi,
Can you share your WSDL.
You can send it to me at [email protected]
-Vishal

Newbie question to java web services....

hi,
I used to be a .net programmer for a few years, and am have done web services in .net.... (using IIS, of course)
And i moved onto Java side recently - and am pretty new to tomcat / axis..etc..
I looked at the netbeans ide tutorial, and it covered on how to create a web services and a client using the IDE - with that is with the sun app server. Since I want to stick with Tomcat (which is a servlet container, i believe), the compilation complained that the HelloWSImpl.java is not a servlet, and will not let me run the web app. I have tried the WSDP 2.0 tutorial as well, but I first got the FastSetsource.jar not found? Then I got some other classes not found..etc... so, until now - i still am not able to create a web service, and a cliet to talk back and forth.
I have the following questions..
1. I am confused that how come tomcat itself is already a webserver, why would people use it on top of apache http server, which is another web server?
2. To create a web services, (I am thinking of the .net web services that i have done - that once you deploy it with IIS, and you browse to that service, if the function takes 2 parameter, there will be 2 textboxes waiting for you to put data to, then once you post - the xml response will come back...), does java allow front end interface automatically like that in .net? Or you have to code the JSP pages to include those textboxes yourself, and do a manual post to the web services address?
3. Are there any book out there, explains how to use tomcat for webservices? I have looked thru some of the java books that talks about web services, they mainly explain what webservices are, what is xml..etc... and of course, they did talk about the differenct type of messaging format available. (JAX-RPC..etc..)
4. In the java world - how do you use webservices? Is it the same way that i am familiar with? Like, that we have a front end gui, that it will call the web services, pass it a few param, and get the xml result back, and parse it and display / store.. it? Or that is not the correct way to consume the web services in java world?
5. In .net - as long as i have the .net framework sdk, and a IIS - i am good to go. In java - what do i need in order to deploy a web services?? I already have tomcat / jdk / wsdp / IDE - do i have enough to create a simple ws? if so, can you show me a basic tutorial??
based on some reading, i understand that the ws on the service side, needs an SEI implementing java.rmi.remote, and we need another class implementing this SEI. But I would really want to see more example, or downloads, where i can just download / view the whole thing all at once... I googled "java web service", "jax-rpc example"..etc.. most of the return links are from either java.sun.com, or ibm, or some other vendor's web site, explaining the architecture... I really want to look at the code, to get a better understand, what is the relationship between each of these softwares (tomcat, apache http server, axis...)
Any suggestions??
Thanks,
T

I think I can answer your Q1
Apache is very good at serving simple HTML pages
Tomcat is capable of serving active content
So the two complement each other
Or that's how I understand it.
Steaker

JDeveloper 10g 10.1.3 Web Service Question: java web service calls another

I am looking for what I think should be a simple example/tutorial but so far no luck. I am using JDeveloper 10g 10.1.3 and the Oracle Application Server.
I want to do this:
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- deploy it
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I did what I thought were the right things; generated a proxy for the first web service, and used that proxy in the second web service's source Java class. However when I deployed and tested many classes were missing: all the classes the proxy class depends on.
I actually managed to get something like this working but had to manually create the .ear and .war files for WSfront, explode the archives, and manually add the missing classes to its WEB-INF/classes.
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Is there a simple graphical way to do this in JDeveloper?

Hello again,
I am quite surprised I got no responses to my query below.
Can anyone explain how I might do this?
Please feel free to respond to [email protected]
I am looking for what I think should be a simple
example/tutorial but so far no luck. I am using
JDeveloper 10g 10.1.3 and the Oracle Application
Server.
want to do this:
create a simple Java web service
deploy it
create another simple Java web service, that makes a
call to a method on the first service
deploy it
client->WSfront->WSback
want to keep this as basic as possible.
lthough I have found examples of how to create a web
service proxy, there are no examples that I have
found that show how to use that proxy in another web
service:
I did what I thought were the right things; generated
a proxy for the first web service, and used that
proxy in the second web service's source Java class.
However when I deployed and tested many classes were
missing: all the classes the proxy class depends
on.
I actually managed to get something like this working
but had to manually create the .ear and .war files
for WSfront, explode the archives, and manually add
the missing classes to its WEB-INF/classes.

Help on Sun Certified Developer for Java Web Services (CX-310-220) exam

Hi,
I am planing for Sun Certified Developer for Java Web Services (CX-310-220) certification. Can anyone provide me the links for resouces? can anyone provide me books/publications/author best preparation material to score good marks in exam? can anyone provide me the download resources available over internet?
thanks in advance..!!!
regards
gaveesha

yes, that's the only decent book covering most of the exam curiculum (but NOT all of it, check the exam specs versus the book content to know what you are missing).
I'm working on the same material, and boy is it a lot...
Dry, boring stuff most of it.

Sun Certified Developer for Java Web Services (CX-310-220)

Hello All,
I'm planning to study for Sun Certified Developer for Java Web Services (CX-310-220). I really appreciate any help in suggesting the books and the material requiered for the above certification.
Thanks,
Greeshma...

yes, that's the only decent book covering most of the exam curiculum (but NOT all of it, check the exam specs versus the book content to know what you are missing).
I'm working on the same material, and boy is it a lot...
Dry, boring stuff most of it.

Java Web Services Developer Pack 1.5 and SOAP?

Hi all,
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Olia

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I'm also facing the same problem with you to understand what is web service and how to go about it. Until today I still confusing but I tried to understand it by running a few tutorials. So far the cool one is at http://www.myeclipseide.com/documentation/quickstarts/webservices_jaxws/.

Java Web Services Editor?

Hai there. I am new for Java Web Services.
Can anyone tell what editor that can I use to write the Java Web Services?
All the tutorial here are compile and run using dos environment.
Then what editor that I can use for writing the code?
Is that using jBuilder or else?

Hi,
You can use anything to write the web services. Even a notepad is good enough.
But if you have anything that can format and highlight xml tags/java source in different color scemes it might be better. A simple text editor is sufficient for you to get started with web services.
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Aviroop
MCSE
(Minesweeper Consultant & Solitaire Expert)

Java Web Services Developer Pack 1.3 now available

All,
The Java Web Services Developer Pack 1.3 is now available for
download from http://java.sun.com/webservices. This release of JWSDP includes the fcs release of JAXRPC 1.1 and SAAJ 1.2 based on the WS-I basic profile 1.0 in addition to bug fixes /maintenance relases of the other components that have been in there in the previous releases. Feel free to download and send us comments at [email protected]
- Rajiv
:wq

I was pumped when I saw this post, then deflated when I read what was new...
No new JSF. I'm sooo ready for an update :-)
TTFN,
-bd-
http://bill.dudney.net/roller/page/bill

Java Web Services wrapper and connection management.

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No Problem at all
Nomally the Web Service is big different between Web application. or you can build your Web service structure like web application structure. It depends on the web server:
If the Web Server of hosting company has WEB Service framework, you just need know how to deploy your Web service to Web Service framework and How to deploy to Web Server. In this case, you need deploy it two time, one is for Web Server framework and one is for Web Service framework
If the Web Server of hosting company doesn't has WEB Service framework, you need build your own Web Service framework into a web application, then you just need know how to deploy your web application with Web service into Web Server framework

What is java web services?

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