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Haven't come across this one with quite a bit of Googling.
I know I can set the instance by decorating the class name thus:
[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall,
ConcurrencyMode = ConcurrencyMode.Multiple)]
but can I specify this in the web.config file?
I know I can specify throttling (max concurrent users etc) in the web.config / app.config and that the numbers here have a context depending on the instance mode - but how to specify the mode (in most likely the behaviours section of the app.config / web.config)?
Originally we were going for Windows services. Now we are using WAS. Does WAS make any difference - eg. each 'per call' request will still get's it own 'server' as a pipeline operation?
Thanks
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InstanceContextMode property to specify the lifetime of the InstanceContext object. Windows Communication Foundation (WCF) can create a new InstanceContext object for every call, every session, or specify that the InstanceContext object is bound to a single service object. For a working example, see Instancing.
Notice that when the concurrency mode is Multiple , the results are returned in a different order than how they were called, because the service processes multiple messages concurrently.
WCF can maintain a session between a client and a particular service instance. When the client creates a new proxy to a service configured as a sessionful service, the client gets a new dedicated service instance that is independent of all other instances of the same service.
There are three basic types of concurrency supported by WCF 4.0: Single Concurrency Mode. Multiple Concurrency Mode. Reentrant Concurrency Mode.
You can not configure InstanceContextMode and ConcurrencyMode in config files, build in limitation in the WCF, i am sure MS has their reasons.
About hosting in WAS, if you have a web server with IIS 7/7.5 it is recommended to host your service with WAS because you can manage your services with the IIS management and get a lot of built in capabilities from it.
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