How to use tomcat apache nio server

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Java

Apache

Good day,

As we know tomcat 7 support servlet 3.1 which is non-blocking just like node.js server.

I would like to know how could i use tomcat as completely non-blocking server.

1) Should i have to change java io functionality to java nio?
2) How should i use database operation.

any good tutorial link on tomcat 7 nio will be best help for me.

thanks.

What I have tried:

I have already searched on google but unfortunately found nothing.