SCR to R7 Migration (DS annotation)

Hi Team,

I am new to DS annotation.

We were using SCR annotation, now we are getting like this is deprecated and now for any new service (workflow, servlet or scheduler) creation we need to use R7 annotations.

I tried to follow : http://www.sgaemsolutions.com/2017/07/migration-of-scr-annotations-to-osgi-r6.html

To use R7 annotation. but after adding plugin and dependencies to pom.xml and build project still I am seeing error.

So could you please guide me how to Migrate from SCR to DS annotation(R7).
1- is there any help guide documentation SCR to R7?

2- do we need to Migrate all the old code from SCR to DS annotation, if we dn't migrate old code and kept as is SCR annotation what will be the impact?

@kautuk_sahni  @arunpatidar  @vijayalakshmi_s  @vanegi