The Send Adapter commits changes per message and per object. This means commits cannot span messages. Within a message, changes to an object are all committed together. To ensure changes are all or nothing, therefore, the strategy you need to use is one message per object.
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Both. The query is sent out by the send adapter. The actual querying is done by components of the receive adapter. Therefore, to be licensed to create Solicit-Response send ports, you need to be licensed for both the ActiveADAPTER send and receive adapters.
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