Nerf Herder

A companion service to mongod to keep long running queries from causing chaos.
Every so often config.interval nerfHerder will poll mongo to find a list of
current operations. nerfHerder will then loop through each operation and
evaluate each rule in config.rules. Each λ rule has the operation set as the
context this. The λ can due whatever logic it wants and then return a
thruthy value. true means the nerf lives, false means the nerf dies,
killOp will be called to kill it.

Install

```bash
git clone git@github.com:thurmda/nerfHerder.git
npm install
npm test
``

Usage

``bash
nerfHerder -d MONGO_CONNECTION_STRING -f PATH_TO_CONFIG
``
example
``bash
nerfHerder -d mongodb://localhost:27017/local -f test/config/config.js
``

$3

``js
module.exports = {
"interval" : .3 * 1000, //Polling interval in miliseconds
"rules" : [
function(){/ 'Print op and let it live.' / console.log(JSON.stringify(this)); return true;},
function(){/Kill everything over 2 secs! / return (this.secs_running < 2);}
]
}
```

###ref
http://www.youtube.com/watch?v=1f6Xc3PsOkc