Need ODM SDF Syntax to Declare an Expected Response to an odmAction

[gerickson]

In Weave Data Language (WDL), Commands (ODM "Actions") may either be one-way "fire-and-forget" requests or two-way request / responses. A two-way response is declared as a RESPONSE_EVENT.

To be expressed in ODM SDF losslessly, a syntax construct for declaring an odmAction response is required.

This issue is related to #40. Where that declares the name of the response to expect in the request; this issue deals with declaring the response itself.

Relevant Example Schema Input Files

• weave/trait/security/user_pincodes_settings_trait.proto

Example Input WDL

message SetUserPincodeRequest {
    option (wdl.message_type) = COMMAND;

    option (wdl.command) = {
        id: 0x01,
        completion_event: "SetUserPincodeResponse"
    };

    UserPincode  user_pincode = 1;
}

message SetUserPincodeResponse {
    option (wdl.message_type) = RESPONSE_EVENT;

    PincodeErrorCodes status = 1;
}

[mjkoster]

outputData should cover this see #69

[WAvdBeek]

i agree with Michael.

do we want to have a separate error identification?

[asoloway64]

F2F4: We do not have any way to currently represent this. Lack of required output data cannot distinguish between "fire-and-forget" or optional payload. Action: Michael to create a new quality after confirmation on our understanding.

[mjkoster]

It seems like we need to indicate whether the action is expected to have a response or not, separately from whether output data are defined. I.e. if there are no output data defined, there still may be a response (we used to call it "synchronous" but that might be confusing in this context). How about a boolean quality "responseExpected" which could be used as a protocol hint?