Jasmine

A distributed cache

its structure like this:

                 /---> node
user -> manager  -----> node  
                 \---> node

use Consistent Hashing algorithm to find designated key

manager

you should config nodes in nodes.json like this:

every object has two attributes: node's name node's address

[
  {
    "name": "pigeon1",
    "address": "localhost:8001"
  },
  {
    "name": "pigeon2",
    "address": "localhost:8002"
  },
  {
    "name": "pigeon3",
    "address": "localhost:8003"
  }
]

after config

use manager -port 7070 to run a manager, and you can use http://localhost:7070/api/?key=114 to get a value

node

define a callback which function signature is func(key string) ([]byte, error)

if node can't find key from its cache, it will call callback(key) to get value and put it into cache