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Messages vs. Types
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generate, create code128b security none in word documents projects BusinessRefinery.com/code 128bc# crystal reports barcode bmp code39 ttf generate, create code 39 extended unicode none on .net projects BusinessRefinery.com/barcode 3 of 9Remember that all Web service specifications are composable. Routing does not implement any kind of security for referred messages. However, you can use WS-Security in conjunction with routing to provide a security solution for the referred messages. For example, you can digitally sign or encrypt incoming messages, as you saw in the SOAPSender solution. Note that encrypted messages can pass through intermediary routers even if those routers do not know how to decrypt the message. Routing configuration is separate from the message contents. The intermediary only needs to decrypt the message if this is required in order to make a specialized routing decision. But in most cases this will not be necessary. If the routers do need to decrypt the message and you use X.509 certificates for encryption, you must ensure that each of the intermediary services has access to the necessary keys. In fact, this applies whenever you use an X.509 certificate, whether for digital signatures or encryption. In a chain routing model, it is likely that intermediary services will modify the contents of an incoming SOAP request message. If the incoming SOAP message is digitally signed, the intermediary service will need to re-sign the message before forwarding it on to the next service. However, as the SOAPSender solution shows you, digital signature validation will not fail if the SOAP router simply passes on the SOAP message to a destination endpoint without altering the message contents. There is no question that routing solutions add an administrative and development burden to implementing an SOA. And when you add security policies into the mix, the burden will become even greater. It is likely that future releases of WSE will include provisions to address this issue. To this date, subsequent releases of WSE have always managed to reduce complexity compared to earlier releases of the same features. Note For excellent discussions of the general structure of .NET and its components, see Introducing Flow-of-Control Statements
Figure 8-6. ExecuteSQL is now available to be added to the Toolbox.
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