(I am fairly new to web services, kindly excuse any incorrect terminology)
Given a WSDL URL, how does one determine what methods are available in that web service by looking at the source of the WSDL file?
Also, how does one construct a SOAP response to use with the WSDL file to post data back to the web service?
I think what you ask is how to interpret a wsdl. Following articles[1][2] may help you.
[1] http://wso2.org/library/2873
[2] http://wso2.org/library/2935
Unlike the others, I'm not going to go into details about the WSDL file and how you can read it. You will eventually learn all of that by yourself by reading books, articles, experimenting with web services etc.
What I'm going to do is recommend you a very simple to use, yet powerful tool, than must be in the toolbox of every web service developer (especially someone new to web services): SoapUI.
You create a simple project in SoapUI and point it to the WSDL file of the web service. It will discover the operations, create sample request and response messages, create mocks of the web service and much more.
You can then look at the WSDL code and with the help of what's presented inside SoapUI discover which elements are involved in each method.
Just open this url to WSDL (looks like http://host:port/ddfdgfgd?wsdl) in your browser or download it to file.
Find all WSDL sections portType (portType is similar Java interface). All WSDL port types contains operations linked to input/output messages. These messages linked with XSD elements or types (it depends SOAP encoding type).
Also you can import WSDL with Java with wsimport command line tool and implement client or server side.
Related
I want to write a java client to use some medical api. On there website they have uploaded a bunch of WSDL files and corresponding XSD files, along with documentation explaining the SOAP messages format to consume each service.
In past I have used REST API of Amazon and Azure to write java client but this seems to be different.
I have read about JAX-WS and also tried to create a dynamic web project in Eclipse using Tomcat but nothing working (https://wiki.eclipse.org/Creating_a_Java_Web_Service_Client).
Could some one explain me basic steps on how to write a simple java
client to **consume these WSDL and XSD files using SOAP messages** and
point me to really good tutorial where I can understand the underlying
concepts?
Till now:
I read about basic wsdl and xsd structure.
Tried to use Postman and SoapUI to make service call to these services.
But struggling to make first step towards making a simple java client project to interact with these services.
I would recommend you go check SAAJ API
I wanna create a web service client to send some XML data to other web service. Google for the solution for a while but can’t find the correct answer. Now I suffered problem is how to import the WSDL file or ws-addressing to the workspace (if necessary)?
When I used eclipse built-in method to create a web service client it will automatically create some source code (Tomcat v7.0 Apache Axis2). How to use it to connect to other service and should I fallow the XML schema?
Here is the example below
http://help.eclipse.org/luna/index.jsp?topic=%2Forg.eclipse.jst.ws.cxf.doc.user%2Ftasks%2Fcreate_client.html
When I used some source code that I search from internet. The code looks like create a XML by itself. How to I follow the XML schema according to this code?
Here is the example below Working Soap client example
Hopefully someone may give me some clues or more detail information.
Try to use Jaxb & jax-ws which enable to generate and client stub from your WSDL and all XSD dependencies (if reachable). You will have java beans for all objects that will be passed in arguments (ie Jaxb will handle the XML conversion).
you can also refer to this thread: Web service client given WSDL
If you are comfortable using Spring and Maven , find below link which might be useful :
https://spring.io/guides/gs/consuming-web-service/
I am new to web service and WSDL. I have a MySQL database stored in a server and I need to create a very simple web service that allows third party Java applications to input an integer (say 'membership number') and receive a string (say 'member name'). This should be done with WSDL.
Can someone please tell me what files do I need? A WSDL file, a schema file? Do I need a Java class stored in the server responsible to communicate with the database?
I am pretty lost, I would be thankful if you could give me some suggestion
As the simplest form of webservice is you can continue with JAX-WS, upon deployment of appilication it will publish a WSDL file and you can use this WSDL to communicate it from client
JAX-WS is the simplest way to convert an existing method into a web service endpoint, with a few annotations, and the simple web server in the standard Java 6 JRE. It can autogenerate the WSDL too.
This tutorial covers the essentials for getting started: http://java.dzone.com/articles/jax-ws-hello-world
I have found this to be a very robust technology.
Using the SOAP Webservices can get pretty messy. Unless you are forced, I would recommend you use REST for webservices, it is much less complex than SOAP. You can find a good REST tutorial here.
If on the other hand you must use SOAP, you could strat by taking a look here.
I need comunicating using java with a WebService that uses the WSDL technology.
I tried some libraries but with no success, thus, I decided to do it manually.
My plan is getting a .xml which uses the comunication (filtering with fiddler for example) and copy it manually building a string. So the .xml will be ok. Do I need to take care of anything else?
Do I have to do any more? Http request, response?
I wouldn't like to create all the structure for the xml and after that, find that I can't continue the comunication.
Thanks
Java comes with a complete API for XML Web Services, this is JAX-WS. (lot of documentation available with a simple serach with google)
it allows developers to build a working client with very little effort starting from a WSDL file (seems your case)
I really discourage you to build the client by yourself. You should care about SOAP message building, message sending, response parsing and so on.
I wrote a java web service on Netbeans 6.9.1 and deployed on GlassFish 3.0.1
I have a wsdl url like this "http://localhost:8080/web2/service2Service?wsdl".
How can I use this url to access this web service from another java application.
Thanks
You need to generate some Java that represents the client's view of the Web Service and then invoke that Java. Here's an article which explains some of the detail.
Generating client from WSDL in Eclipse
The general idea is that you generate some Java classes from the WSDL. Those classes act as a proxy for the service you want to call. Your java invokes methods on the proxy objects, the generated code creates the appropriate SOAP messages, sends the HTTP request, interprets the response and your code just sees a Java result.
I just use the tooling built into Eclipse, but you will also find other suitable generators, for example in Apache's Axis
1º U must save the content in a "myWebServices.wsdl" file
2º Run your Wsdl converter, all compilers have one of this, normally the name is WDSL.EXE
This process will create a new file with NameSpace or Package with the definitions of webservices built in.
3º Then imports this package or built a library.
Develop web service Client in second application.
You can use Netbeans to create web service client by giving your wsdl url
The document at this url is the actual wsdl (a description of the actual webservice, written in WebService Definfition Language).
The description includes information about the services url, the protocol(s), the method names and and data objects. Your application will use that information to call the remote methods of that service.
The protocol may or may not be SOAP, and without knowing the webservice details, it's quite impossible to recommend a toolset or methodology to use the webservice, there is no general approach. In most cases we see SOAP, for those services I recomment soapUI as a general tool to use and test SOAP based webservices and apache axis to implement java based service consumers.