SDK v2 Migration guide

[janossch]

Dear azure-iot-sdk-java developers,

Currently I'm trying to migrate my code to v2 libraries. And the very first thing I wanted to modify is the ModuleClient.createEnvironment(...) method.
As per the migration guide suggesting the users can still depend on JNR unixsocket implementation. Nothing is simplier I've copied the provided sample code.

1. However I don't really understand why there is a System.arraycopy(...) call is needed in the read() method?
   ByteBuffer.wrap(...) "modifications to the buffer will cause the array to be modified and vice versa" source.

2. Since our project is based on Java17 do you think it is a good choice to use its built in unix socket support?
   ... even if it is not among supported JDK platforms yet...

Thank you! I'm looking forward to your reply!

[timtay-microsoft]

However I don't really understand why there is a System.arraycopy(...) call is needed in the read() method?
ByteBuffer.wrap(...) "modifications to the buffer will cause the array to be modified and vice versa" source.

This may be an unnecessary line in our sample code, and we'll take a look at it. You are right that it appears the wrapped buffer will
be updated without needing to call System.ArrayCopy(...) here as well.

Since our project is based on Java17 do you think it is a good choice to use its built in unix socket support?
... even if it is not among supported JDK platforms yet...

Go for it! We use the JNR unix socket library in our samples largely because there was no native unix socket support in Java at the time.