tag:blogger.com,1999:blog-44511740177531225512012-02-16T02:00:17.919-08:00vimalhttp://www.blogger.com/profile/03893375275017194971noreply@blogger.comBlogger21100tag:blogger.com,1999:blog-4451174017753122551.post-46356082135656756302008-10-23T11:39:00.000-07:002008-10-23T11:47:42.348-07:00Software systems that support interoperable network interactions<br /><ul><li>Web service interface described in WSDL (Web Services Description Language)</li><li>Other systems interact with Web services using SOAP (Simple Object Access Protocol) messages</li><li>Data is exchanged using XML format</li><li>Messages are sent using HTTP, SMTP</li></ul><br />WSDL - Platform and Language independent XML description of Web service<br />UDDI - Universal Description, Discovery, and Integration - Registry of organizations and their Web services<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/4451174017753122551-4635608213565675630?l=nwenterprises.blogspot.com' alt='' /></div>vimalhttp://www.blogger.com/profile/03893375275017194971noreply@blogger.com0tag:blogger.com,1999:blog-4451174017753122551.post-35848461619290700802008-10-23T11:22:00.000-07:002008-10-23T11:32:59.514-07:00SOA is a set of distributed software components that publish service descriptions and interact using messages.<br /><br />There are usually 3 participants<br /><br /><span style="font-weight: bold;">1. Service Provider</span> - Creates service and description and publish in registry<br /><span style="font-weight: bold;">2. Service Requester</span> - Finds service description and service and uses the service<br /><span style="font-weight: bold;">3. Service Registry</span> - Publishes services and allows service requester to search registry<br /><br /><span style="font-weight: bold;">Old SOA Implementations</span><br /><br /><span style="font-weight:bold;">DCOM -</span> Distributed Component Object Model<br /><span style="font-weight:bold;">CORBA -</span> Common Object Request Broker Architecture<br /><span style="font-weight:bold;">EDI -</span> Electronic Data Interchange<br /><br /><span style="font-style: italic;">Drawbacks</span><br /><br /><ul><li>DCOM - Microsoft specific; no service registry</li><li>CORBA - complex software; expensive to install and maintain</li><li>EDI - no service registry; no standard for service descriptions</li></ul><br /><span style="font-weight: bold;">New SOA Implementation</span><br /><br />Web Services<br /><br /><span style="font-style: italic;">Advantages</span><br /><br /><ul><li>Common language for writing service descriptions</li><li>Platform/language independent messaging protocol</li></ul><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/4451174017753122551-3584846161929070080?l=nwenterprises.blogspot.com' alt='' /></div>vimalhttp://www.blogger.com/profile/03893375275017194971noreply@blogger.com0