protobuf dependency update

[georgweiss]

Turns out that a version update for protobuf might be sufficient. Basic testing does not show any errors, archiver data is retrieved as expected.

[shroffk]

The update of the proto buffer dependency fails.
We are using the archiver appliance snapshot from 17-December-2021

[shroffk]

currently, I do not see any error messages or logs on the client side.. it simply fails silently :(

[georgweiss]

Sadly I now get the same disappointing result using this PR. However, rebuilding the pbrawclient jar against protobuf version 3.21.8 and using that updated jar in the project works for me. Probably had that updated jar in the project when I did my testing, sorry for missing out on that.

Suggest we close this PR for the time being and create a new when we can rely on a new pbrawclient from the "official" source. Issue ticket created: archiver-appliance/epicsarchiverap_pbrawclient#1

[shroffk]

Ok,
I have this working too.
Using the prebuilt protoc binaries (for windows) I was able to rebuild the pbraw client and use it to retrieve pbraw data from our production archiver.
TODO: test with archived waveform pv's
@georgweiss we should update the phoebus dependencies to use the new client ( include the new jar in the install dependencies module )

[georgweiss]

As discussed: pbrawclient dependency updated to use a jar built against protobuf v3. Note however that the data types are still protobuf 2.

[shroffk]

completed testing with waveform pv's too