passing objects to web service
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passing objects to web service
by wakeup
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Re: passing objects to web service
by Arthur Ryman-2
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Just say no. Don't view Web services as a distributed object technology. View it as message exchange technology. Design your messages as nice, easy to understand XML documents and then you can bind them to objects inside your implementation. If you use an implementation language like Java or C#, you can generate code from the XML document description, i.e. the XSD, that is part of the Web service description (WSDL). Arthur Ryman, IBM Software Group, Rational Division blog: http://ryman.eclipsedevelopersjournal.com/ phone: +1-905-413-3077, TL 969-3077 assistant: +1-905-413-2411, TL 969-2411 fax: +1-905-413-4920, TL 969-4920 mobile: +1-416-939-5063, text: 4169395063@...
I'm not sure which is the best form to passing objects in web services. How do you do it? - Returning the class? public myclas exampleMethod() - Returning a XML string? public string exampleMethod() - Another form? Thanks __________________ Hip Hop Chistes -- View this message in context: http://www.nabble.com/passing-objects-to-web-service-t1374219.html#a3687980 Sent from the w3.org - www-ws-desc forum at Nabble.com. |
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Re: passing objects to web service
by wakeup
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RE: passing objects to web service
by Rogers, Tony
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I don't believe Arthur was
advocating returning a string.
Speaking for myself, I think you are mixing
layers. The string / XML is the transmission format. If you are using an RPC
model, then you should be thinking of the internal model when defining the RPC
signature, not the way in which it is transmitted. You should define a
structured object that you want returned, and specify that in the method's
signature.
Assuming that you have a structured object
type called, for example, MyStructuredType, then the signature should
be:
public MyStructuredType
exampleMethod()
The fact that this type will be transmitted
as XML is irrelevant to the method signature. That fact only becomes relevant
when defining the WSDL that will describe the call. That's a different
layer.
Does that clarify things?
Tony Rogers From: www-ws-desc-request@... on behalf of wakeup (sent by Nabble.com) Sent: Mon 03-Apr-06 17:09 To: www-ws-desc@... Subject: Re: passing objects to web service Then you recomend this? |
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RE: passing objects to web service
by wakeup
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Re: passing objects to web service
by Arthur Ryman-2
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No. There are two approaches that work well. 1. Design an XML schema for you input and output messages, put those in the WSDL and then use a tool to generate code from WSDL, and fill in the implementation of the code by delegating to your existing objects. 2. Design data transfer objects in you programming language and write a wrapper class for you existing code. The wrapper uses the data transfer objects in its method signature and its implementation delegates to you existing object. Then generate WSDL for your wrapper class instead of your original code. Both of these approaches produce simple XML messages that can be easily processed by other clients. Arthur Ryman, IBM Software Group, Rational Division blog: http://ryman.eclipsedevelopersjournal.com/ phone: +1-905-413-3077, TL 969-3077 assistant: +1-905-413-2411, TL 969-2411 fax: +1-905-413-4920, TL 969-4920 mobile: +1-416-939-5063, text: 4169395063@...
Then you recomend this? Returning a XML string? public string exampleMethod() But with this option, you spend time formatin xml to objects, I'm not sure. -- View this message in context: http://www.nabble.com/passing-objects-to-web-service-t1374219.html#a3720932 Sent from the w3.org - www-ws-desc forum at Nabble.com. |
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