Hi, No problem in particular. But I have noticed the time difference when running a text mining workflow (single service) rather than running it locally. Just wondering to be honest - child-like curiosity.
cheers, Paul. Simon Felix wrote: >> From: Paul Fisher [mailto:[email protected]] >> >> Hello, >> >> This is probably an easy question to answer, and most likely a stupid >> question to ask. >> I have been thinking of the overhead Taverna imposes due to the nature >> in which Web Services are called. >> At the moment, each service request is handled by Taverna, which is >> then >> sent to the service. Taverna then catches the result, and passes it to >> the next service. Although the new T2 implementation uses a referencing >> system, the data is still sent from and to Taverna.. back and >> forth.....back and forth. >> >> My question: >> Is it possible to design a service/set of services/workflow that is >> capable of accepting pointers to other services. E.g. data is sent from >> one service to the next and is never returned to the user unless >> requested. >> > > Hello Paul, > > this is (in theory) possible. The problem is that most web services are done > in an RPC-like fashion. They will return the results to the caller. This is > how HTTP and most other protocols works. If you were to create something you > described a web service would have to create a new communication channel to > another service. > > Problems with the approach: > - I never heard of a standardized way to do this. > - In most cases the existing approach is good enough > - It's difficult to track status and trace errors > - It's difficult to return the results to a client because a client > seldom offers a public accessible interface which the last web service > in a chain could use. > > What is the exact problem you're trying to solve? > > ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ taverna-users mailing list [email protected] [email protected] Web site: http://www.taverna.org.uk Mailing lists: http://www.taverna.org.uk/taverna-mailing-lists/
