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scdjws design pattern pattern java soap java design pattern spring spring framework dependece injection scwcd servlet scbcd ejb stateful stateless jsp decorator pattern uml decorator xsd schema observer strategy pattern uddi registry uddi wsdl saaj schema xml schema wire bean singleton factory pattern sax jax-p json xml parsing xslt rest stax dom framework httpservletresponse httpservletrequest webservices jax ws jax-ws get post http xsd