Added pulsar binder support.

[arnogeismar]

In our organisation we only have a pulsar broker, and we want to avoid using a kafka protocol handler to talk to pulsar

[arnogeismar]

@onobc my apologies I modified my original PR and signed off on the commit.
At Acerta we are using spring cloud dataflow which leverages spring cloud stream underneath.
Currently spring cloud stream applications only provides kafka and rabbit flavours of stream applications.
We where investigating vendors which could provide us with a kafka protocol handler so that we could use the kafka flavour of stream applications, however because of budgetairy reasons we decided to try to add native pulsar support to the stream applications project.

[onobc]

Hi @arnogeismar,

Thank you very much for the PR - it is very thorough (including updating the GH workflows).

I am sorry that I just now noticed it and just now replying - my apologies.

At Acerta we are using spring cloud dataflow which leverages spring cloud stream underneath

Which version of dataflow are you using? Are you using the OSS or commercial version (asking because Spring Cloud Data Flow End of Open-Source).

however because of budgetairy reasons we decided to try to add native pulsar support to the stream applications project.

I do love the idea of adding support for the Pulsar binder. Again, super grateful for you submitting this code proposal, the ultimate cost is not the initial add but rather the ongoing maintenance of another set of the apps to test. We will discuss at our next team meeting and get back w/ you on this PR.

[arnogeismar]

Hi @onobc,
We are using the latest OSS version but are looking into purchasing an SCDF licence. Talks are currently underway.
I understand the added maintenance cost might be a deal-breaker. For now we forked the project so we can already use the pulsar binder. Looking forward to whatever the team decides.

[cbonami]

Which version of dataflow are you using? Are you using the OSS or commercial version (asking because Spring Cloud Data Flow End of Open-Source).

I am a colleague of Arno. We've been asking at Broadcom for pricing but haven't received a response yet. We're still using the OSS version (latest one available). We are NOT VMWare Tanzu customers, so we are a bit worried.