abee | template-based meteor scaffolding application | Web Framework library

I would like to omit dots within a word like a.b.c.d (becomes abcd), But under some conditions:

• There should be at least 2 dots within the word, For example, a.b remains a.b, But a.b.c is a match.
• This should match on 1 or 2 letters only. For example, a.bb.c is a match (because a, bb and c are 1 or 2 letters each), but aaa.b.cc is not a match (because aaa consists of 3 letters)

Here is what I've tried so far:

Im trying to implement this joins according this kafka documentation.

I've no idea why this joins does not work...

First I passed all values.

Here it try to force generics to be of type Object, this is very wrong.

Without Joined with serialization options I receive this runtime exception:

Exception in thread "StreamAPP-stream-event-b3dc5fff-abee-4fa0-92f9-e1690f8fd152-StreamThread-1" org.apache.kafka.streams.errors.StreamsException: ClassCastException while producing data to topic StreamAPP-stream-event-KSTREAM-KEY-SELECT-0000000025-repartition. A serializer (key: org.apache.kafka.common.serialization.ByteArraySerializer / value: org.apache.kafka.common.serialization.ByteArraySerializer) is not compatible to the actual key or value type (key type: br.com.calebebrim.kafka.entities.stream.sharing.registry.StreamRegistryKey / value type: br.com.calebebrim.kafka.entities.stream.sharing.stream.Event). Change the default Serdes in StreamConfig or provide correct Serdes via method parameters (for example if using the DSL, #to(String topic, Produced produced) with Produced.keySerde(WindowedSerdes.timeWindowedSerdeFrom(String.class)))

Can anyone help me?

Thanks!

I know I can do something like this in Java:

String foo = 'a' + "bee";

If I print foo to the console I'd get abee. What is actually happening under the covers here? I assume 'a' is being promoted to a String, but I'm not sure what rules govern this type of conversion. It doesn't seem to be a case of autoboxing as far as I can tell, as autoboxing maps from a primitive type to a wrapper class (e.g. int -> Integer). Is a String considered a wrapper for a char?

One thing that makes this a bit more interesting is that if I do something like String test = 'a' + 'b'; I get a compilation error. I understand that this is because characters are treated as integers when they're added, though it seems reasonable to expect that I'd get something like "ab" in test given the behaviour when adding char and String.