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A standards body working on protocols for Web services has begun crafting a specification for reliability that will help plug a hole in the budding technology that is stifling enterprise adoption.
The Organization for the Advancement of Structured Information Standards (OASIS) on Wednesday said it is forming a Web Services Reliable Messaging (WS-RM) technical committee that will develop a specification to guarantee the delivery of messages between applications, especially those executing business transactions.
Reliability and security are two areas of Web services development that corporate users are closely watching. Both are needed to ensure that Web services can live up to enterprise demands for distributed computing.
WS-RM will work with Simple Object Access Protocol (SOAP), the standard messaging protocol used for Web services. WS-RM information would be inserted into the headers of SOAP messages.
WS-RM will be crafted from the WS-Reliability specification drafted in early January by Fujitsu, Hitachi, Oracle, NEC, Sonic Software and Sun. Tom Rutt, IT standards manager for Fujitsu, will serve as chair of the committee.
“For a lot of important applications this sort of reliability can go a long way,” says Rutt. He says applications such as those that do financial transactions must have guaranteed delivery to meet quality-of-service standards. For instance, a message requesting a money withdrawal should be received by an application once and only once.
“We are talking about reliability in a straightforward fashion - a specification without a whole lot of complicated protocols,” says Rutt.
WS-RM will include three types of delivery: guaranteed delivery, which means the message is delivered at least once; duplication elimination, which ensures the message is delivered at most once; and message delivery sequencing, which determines the order in which messages are delivered.
Eventually, the specification will be integrated with Web Services Description Language (WSDL), which is used to describe how a Web service operates and would signal that an application has a reliable delivery capability.
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