Use of service units

Hi,
I have a problem trying to understand when to use a Service Unit.
If i need to design for the following flow of control.
1. Client invokes service A
2.A responds to request
3.Client invokes service B, based on the response from A.
Assuming that services A and B are http-soap based web services,
do i need to delpoy service A and B using a service unit on to a http Binding Component ?
Or
Do i need to create two instances of the http Binding component for ServiceA and Service B and configure them to invoke the web services.?
Thanks in advance
vamsi

For a static service dependency situation, such as you describe, external service providers must be configured in the appropriate binding component, so that it a) knows about the provider, and b) can make the service available within the JBI environment. Those configuration data are held in a service unit, deployed to the binding component.
You'll only need one bindiing component; you'll probably create two separate service units for the binding component.

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