ISPN-14064 RESP server should implement COMMAND command

[wburns]

• ERR for any command arguments

https://issues.redhat.com/browse/ISPN-14064

[jabolina]

CI was crazy, just restarted. Should we add a test for this?

[wburns]

CI was crazy, just restarted. Should we add a test for this?

Sure, I can add a simple one real quick

[wburns]

Actually I don't see a way with lettuce to invoke COMMAND DOCS. Guessing the API was only designed for redis 6, probably why lettuce is on release 6 as well. Guessing once Lettuce 7 comes out we can add a test if we ever remember.

[tristantarrant]

Actually I don't see a way with lettuce to invoke COMMAND DOCS. Guessing the API was only designed for redis 6, probably why lettuce is on release 6 as well. Guessing once Lettuce 7 comes out we can add a test if we ever remember.

You can use https://github.com/lettuce-io/lettuce-core/wiki/Custom-commands,-outputs-and-command-mechanics

Command<...> response = redis.dispatch(CommandType.COMMAND, new StatusOutput<>(StringCodec.UTF8),
               new CommandArgs<>(StringCodec.UTF8).add("DOCS"));

[tristantarrant]

I've created wburns#3

[wburns]

Pulled in your changes, thanks @tristantarrant Just added a very small tweak to limit lines changed.

[jabolina]

Merged, thanks @wburns