Sloth Bucket

A simple, persistent user slot system to store data sequentially with allocate/deallocate functions.

Get started

1. Install and run redis.
2. We have provided a Dockerfile that will create a simple redis server container

• sudo docker build -t <your namespace>/redis .
• sudo docker run -d -p 6379:6379 <your namespace>/redis

1. Install sloth-bucket

• npm install sloth-bucket --save

1. For using sloth-bucket in production, you can easily configure the underlying redis store:

var sloth = require('sloth-bucket');
 
var options = {
 host: '192.168.2.45',
 port: 8034,
 socket_keepalive: true
}
sloth.init(options);
 

Usage

var sloth = require('sloth-bucket');
var username = 'marvin';
 
//initialize the slots with a starting buffer:
sloth.createUserSlots(username, 1200, 'infantryUnits');
 
var hitPoints = '5';
//assign variable value above to a new slot:
 
sloth.allocateSlotId(username, hitPoints, 'infantryUnits').then((result) => {
  var newId = parseInt(result);
  console.log('NEW ID: ', newId);
});
 
//deallocate a slot at index 3 for user 'marvin':
sloth.deallocateSlotId(username, 3, 'infantryUnits').then((result) => {
  var newIndex = parseInt(result);
  console.log('DEALLOCATED USER DATA AT INDEX: ', newIndex);
});
 
sloth.getSlotContentsByIndex(username, 2, 'infantryUnits').then((result) => {
  console.log('GETTING USER DATA AT INDEX 2: ', result);
}
 
hitPoints = 3;
sloth.setSlotContentsByIndex(username, 2, hitPoints).then((result) => {
  console.log('SETTING USER DATA AT INDEX 2: ', result);
} 

Utilities

//reset all slots for a user:
sloth.deleteUserSlots(username);
 
//get next available slot id:
sloth.nextAllocationSlot(username, 'infantryUnits').then((result) => {
  console.log('NEXT AVAILABLE ID: ', result);
}); 

Configuration

For more redis configuration options, consult the redis documentation.

//configure underlying redis cache:
var options = {
  host: '192.168.2.45',
  port: 8034,
  socket_keepalive: true
}
sloth.init(options);
 
//set slot's hash index as non-zero based:
sloth.nonZeroBased();
 

Changes by release (all versions prior to 2.0 are beta)

v. 1.4.1

• removed the slot prefixing, in favor of enabling multiple slots, like this:

sloth.createUserSlots(username, 1200, 'infantryUnits');
sloth.createUserSlots(username, 20, 'badgesEarned');
 

v. 1.3.12

• new minor feature: nonZeroBased() configures non-zero based hash of slots
• new minor feature: get/setSlotValue() function to get/set slot data

v. 1.2.11

• added nextAvailableSlotId() function for retrieving next unallocated slot Id

Tests

### Set up

1. Install redis on the computer on which you want to run the tests.
2. We have provided a Dockerfile that will create a simple redis server container

• sudo docker build -t <your namespace>/redis .
• sudo docker run -d -p 6379:6379 <your namespace>/redis

1. Install the redis-cli package:

• :$ npm install redis-cli -g

### Run

1. Sloth-bucket tests are simple scripts with no dependencies on unit testing frameworks or test runners.
   Get over it, cd into the /test folder, run:

   • node test
   • node test1
   • node test2

2. Any time you want to check in on what the tests are producing, run the redis CLI:

• :$ redis-cli
• :$ HGETALL user:steve

1. Bask in the [sloth-bucket] goodness! :)
2. run node clean to delete the user slots, or:

• :$ redis-cli
• :$ DEL user:steve