I want to add checkpoints in my scipts/Recording controller.
You can use Assertions in Apache Jmeter,Jmeter is providing different assertions to verify the samples as required,please read more details with examples here.
Try this as a start point. Very good site I used to get into basic Jmeter:
This is the best article I've ever seen. Go through this. You will get a good knowledge.
Here is the link: http://www.guru99.com/assertions-in-jmeter.html