Why I love WSE 3.0

I have been using WSE 3.0 for a while now and I really like it. I really like the policy mechanism in the WSE, it affords me a kind of AOP (aspect orientated programming) that I am really starting to get into. For instance I have made a lot of SoapFilters recently, some handy, some just for tests, but each of them allow me to add an aspect of functionality into the webservice that I am creating in a configuration and not a design time.


This content originally appeared on Modern Web Development with Chrome and was authored by Paul Kinlan

<p>I have been using WSE 3.0 for a while now and I really like it.  I really like the policy mechanism in the WSE, it affords me a kind of AOP (aspect orientated programming) that I am really starting to get into.   For instance I have made a lot of SoapFilters recently, some handy, some just for tests, but each of them allow me to add an aspect of functionality into the webservice that I am creating in a configuration and not a design time.  If I want security, just add a policy line in the XML config, if I want auditing another line, if I want exception shielding another line.   All of these aspects of the system I am creating can be added at deployment time thus leaving my web service code clean and simple.</p> <p>An example, pseudo code: </p><div class="wlWriterSmartContent" style="padding-right: 0px; display: inline; padding-left: 0px; float: none; padding-bottom: 0px; margin: 0px; padding-top: 0px;"> <div class="CodeRay"> <div class="code"><pre></pre></div> </div> <div> Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><span style="color: #000000;">[Webservice]</span><span style="color: #0000FF;">public</span><span style="color: #000000;"> </span><span style="color: #0000FF;">class</span><span style="color: #000000;"> OrderService{ [WebMethod] [Policy(ServerPolicy)] </span><span style="color: #0000FF;">public</span><span style="color: #000000;"> OrderList SubmitOrders(OrderList input) { </span><span style="color: #0000FF;">return</span><span style="color: #000000;"> OrderListRepository.InsertNewOrders(input); }}</span> </div> </div><p>And a policy file (not an actual file that would work in this example) would say:</p><div class="wlWriterSmartContent" style="padding-right: 0px; display: inline; padding-left: 0px; float: none; padding-bottom: 0px; margin: 0px; padding-top: 0px;"> <div class="CodeRay"> <div class="code"><pre></pre></div> </div> <div> Code highlighting produced by Actipro CodeHighlighter (freeware)<a href="http://www.CodeHighlighter.com/">http://www.CodeHighlighter.com/</a><p />--><span style="color: #0000FF;"><</span><span style="color: #800000;">Policy</span><span style="color: #0000FF;">></span><span style="color: #000000;"> </span><span style="color: #0000FF;"><</span><span style="color: #800000;">add </span><span style="color: #FF0000;">type</span><span style="color: #0000FF;">="Security"</span><span style="color: #FF0000;"> MustHaveRole</span><span style="color: #0000FF;">="Add"</span><span style="color: #0000FF;">/></span><span style="color: #000000;"> </span><span style="color: #0000FF;"><</span><span style="color: #800000;">add </span><span style="color: #FF0000;">type</span><span style="color: #0000FF;">="Auditing"</span><span style="color: #FF0000;"> </span><span style="color: #0000FF;">/></span><span style="color: #000000;"> </span><span style="color: #0000FF;"><</span><span style="color: #800000;">add </span><span style="color: #FF0000;">type</span><span style="color: #0000FF;">="ExceptionSheilding"</span><span style="color: #FF0000;"> </span><span style="color: #0000FF;">/></span><span style="color: #000000;"></span><span style="color: #0000FF;"></</span><span style="color: #800000;">Policy</span><span style="color: #0000FF;">></span> </div> </div><p>This service code and policy file model is so much cleaner and simpler than what you would have to write if you didn't have an AOP style policy system:</p><div class="wlWriterSmartContent" style="padding-right: 0px; display: inline; padding-left: 0px; float: none; padding-bottom: 0px; margin: 0px; padding-top: 0px;"> <p /> <div> Code highlighting produced by Actipro CodeHighlighter (freeware)<a href="http://www.CodeHighlighter.com/">http://www.CodeHighlighter.com/</a><p />--><span style="color: #000000;">[Webservice]</span><span style="color: #0000FF;">public</span><span style="color: #000000;"> </span><span style="color: #0000FF;">class</span><span style="color: #000000;"> OrderService{<p /> [WebMethod] [Policy(ServerPolicy)] </span><span style="color: #0000FF;">public</span><span style="color: #000000;"> OrderList SubmitOrders(OrderList input) { </span><span style="color: #0000FF;">try</span><span style="color: #000000;"> { </span><span style="color: #0000FF;">if</span><span style="color: #000000;">(User.IsInRole(</span><span style="color: #000000;">"</span><span style="color: #000000;">Add</span><span style="color: #000000;">"</span><span style="color: #000000;">) </span><span style="color: #000000;">&&</span><span style="color: #000000;"> User.IsAuthenticated) { OrderListRepository.InsertNewOrders(input); Log.Audit(Success); } </span><span style="color: #0000FF;">else</span><span style="color: #000000;"> { Log.Error(SecurityError); } } </span><span style="color: #0000FF;">catch</span><span style="color: #000000;">(RepositoryException ex) { </span><span style="color: #0000FF;">throw</span><span style="color: #000000;"> SheildedException(ex, </span><span style="color: #000000;">"</span><span style="color: #000000;">Problem in Repository</span><span style="color: #000000;">"</span><span style="color: #000000;">); } </span><span style="color: #0000FF;">catch</span><span style="color: #000000;">(Exception ex) { </span><span style="color: #0000FF;">throw</span><span style="color: #000000;"> SheildedException(ex, </span><span style="color: #000000;">"</span><span style="color: #000000;">Unkown Exception</span><span style="color: #000000;">"</span><span style="color: #000000;">); } }}</span> </div> </div><p>Now tell me which code you would like to maintain! :)</p><p> </p><div class="wlWriterSmartContent" style="padding-right: 0px; display: inline; padding-left: 0px; padding-bottom: 0px; margin: 0px; padding-top: 0px;">Tags: <a href="http://www.kinlan.co.uk/tag/asp.net" rel="tag">asp.net</a>, <a href="http://www.kinlan.co.uk/tag/WSE" rel="tag">WSE</a>, <a href="http://www.kinlan.co.uk/tag/WSE3" rel="tag">WSE3</a>, <a href="http://www.kinlan.co.uk/tag/c#" rel="tag">c#</a>, <a href="http://www.kinlan.co.uk/tag/.net" rel="tag">.net</a>, <a href="http://www.kinlan.co.uk/tag/webservice" rel="tag">webservice</a> </div>


This content originally appeared on Modern Web Development with Chrome and was authored by Paul Kinlan


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