DenkzeitWiki

Web Services

VerteilteObjekte

REST

SOA
LooseCoupling

Amazon

Web services – do people use those any more? We’ve doing a ton of stuff with JAX-RS and our customers seem to have made the switch for the most part too. I apologize for helping propogate WSDL and SOAP in the past. [1]

• http://www.itworld.com/Tech/4535/nls_ebizdarkglue050607/pfindex.html

SOAP, REST, RPC, WS

But SOAP and XML-RPC have always seemed like they're just trying to piggyback on the fact that port 80 is open on virtually every corporate firewalls.[2]

• SOAP -> Simple Object Access Protocol
• SOA -> Service Oriented Architecture
• REST -> Representational State Transfer
• RPC -> Remote Procedure Call
• WS -> Web Service --http://www.webopedia.com/TERM/W/Web_services.html
  
• http://www.tbray.org/ongoing/When/200x/2003/05/12/SoapAgain
  • http://www.w3.org/2001/tag/doc/whenToUseGet.html
  • http://www.xmlrpc.com/
  
  
• http://www.intertwingly.net/stories/2002/07/20/restSoap.html --Rest + Soap
• http://www.w3schools.com/soap/default.asp --SOAP Einführung
• http://www.soapware.org/ --Ressourcen
  
• http://diveintomark.org/archives/2002/04/25/soap_vs_rest
• http://webpages.charter.net/chrisfer/2005/03/11-0.html

Web Services

A Web service is a software system designed to support interoperable machine-to-machine interaction over a network. It has an interface described in a machine-processable format (specifically WSDL). Other systems interact with the Web service in a manner prescribed by its description using SOAP-messages, typically conveyed using HTTP with an XML serialization in conjunction with other Web-related standards.[3]

• http://www.w3.org/2004/Talks/1118-icsoc-tbl/ --Tim Berners Lee: Web Services - Hopes and Fears
• http://msdn.microsoft.com/webservices/understanding/specs/default.aspx --Web Services Development Center - mit Spezifikationen
  • via http://www.tbray.org/ongoing/When/200x/2005/01/14/RWWS
  
  
• http://www.artima.com/weblogs/viewpost.jsp?thread=27269 --Web Services? What has the industry been smoking?
  RMI over HTTP with XML. Messy!
  
• http://www.serviceoriented.org/message_exchange_pattern.html --Message Exchange Pattern

Definition: An association between a fully-specified InterfaceBinding and a network address, specified by a URI [IETF RFC 2396], that may be used to communicate with an instance of a Web Service. An EndPoint indicates a specific location for accessing a Web Service using a specific protocol and data format.[4]

JAX-RPC

JAX-RPC uses SOAP and HTTP to do RPCs over the network.

• http://www.developer.com/java/ent/article.php/2109561

Java API for building and accessing Web services

• http://www.javaworld.com/javaworld/jw-08-2004/jw-0802-ejbws.html

• WS-DuckTyping
  • Don’t validate incoming messages!
  • Use XPath?!
  • Don’t create stubs or skeletons!