How to execute a java class during nifi bootup ?

[#1]

Hello Experts,

I need to execute java class or a java method during Nifi bootup.

This is to register/integrate my org health check sdk (which has to be done at nifi bootup time)

Is there any option to invoke/execute my java code snippet or a java class during bootup ?
Any suggestion would be appreciated.

One option I have is to write a custom logback appender class and add that custom appender is logback.xml so nifi will run this during bootup.
I am looking for better option.

Thanks,

Mahendra

[#2]

@MattWho @araujo @smdas  Just tagging top solution authors to notify

[#3]

@hegdemahendra 

This is not something I have tried before, but...
When you execute the nifi.sh script to start it bootstrap the NiFi process via the configuration in the bootstrap.conf NiFi configuration file.  It is during the bootstrap process that NiFi starts the main child process that loads NiFi.  Perhaps you can add additional java.args to handle your pre NiFi needs?  

Or maybe modify the the nifi.sh script itself so that is executes your requirements before calling the rest of the NiFi startup process. 

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Thank you,

Matt