David A. Chappell, Tyler Jewell's Java Web Services PDF

By David A. Chappell, Tyler Jewell

ISBN-10: 0596002696

ISBN-13: 9780596002695

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Extra info for Java Web Services

Example text

Xml, except that the root level tag is . The other modification we have made is the addition of an element with the name of attachment. This element contains an href attribute: This element helps identify the attachment when processing the document. txt In addition to the purchase order, you should see the following output in the Tomcat console window: Content-ID = the-attachment The attachment is... This is an attachment. Let's see the raw output from our client by redirecting it at the SimpleHTTPReceive servlet.

The sending and receiving parties need to agree on which elements go there and what they mean. Higher- level protocols built on top of SOAP, such as ebXML Message Service (MS), have formalized the use of the SOAP header by defining specific elements such as a , which contains such specific things as , , and . The SOAP body is intended for the actual data, or message payload, to be consumed and processed by the ultimate receiver. When using SOAP for RPC, the distinction between the header and the body is similar.

That's an acceptable way to deal with the message body if the SOAP layer will interact with a backend system that produces and consumes raw XML documents. However, SOAP documents, or parts of them, need to be built dynamically in many cases. In this example, we construct a SOAP

block dynamically. A SOAP header is not generally intended for application 43 Java Web Services data but for carrying information specific to the SOAP processors that are at either endpoint in the conversation. Therefore, it is the most likely candidate for dynamic construction.

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