Hi Arun,
how do i make sure the dependency of first interface ad second and third interfaces are processing in sequence
1. ICO1, file to BPM (async)
2. BPM automated activity calls ICO2 , BPM to SOAP (sync)
3. BPM automated activity calls ICO3, BPM to SOAP (sync) , in the mapping of this ICO , write udf to pick the file and send to soap receiver. note, this ICO is no longer file to SOAP.
4. ICO4 BPM to JDBC (async)
arrange these activities in sequence in BPM
this is just a way for your scenario, but if there is a chance, you may be able to redesign your scenario based on your business requirements and may be able to accomplish everything without BPM.
how do i start all 3 different service interface with one start interface option in BPM
you cannot use 3 different interface to start BPM process. there will be one start event, and then there can be intermediate message events which will wait for additional events to join the running BPM process based on some correlation condition. but in your case as the interfaces are triggered from file sender, and if second interface is triggered before the BPM is instantiated from first process, your second interface message will be lost as there is no intermediate event waiting to this message.
so you can achieve your scenario using the above option where you pick the files in mapping.