https://github.com/chexiongsheng/luavkv

lua key-value store with version number
https://github.com/chexiongsheng/luavkv

Last synced: 11 days ago
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lua key-value store with version number

• Host: GitHub
• URL: https://github.com/chexiongsheng/luavkv
• Owner: chexiongsheng
• Created: 2014-05-07T08:33:00.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-05-20T09:57:17.000Z (over 10 years ago)
• Last Synced: 2024-10-11T09:54:13.319Z (about 1 month ago)
• Language: Lua
• Homepage:
• Size: 273 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
luavkv

======

key-value store with version number

## Usage

### Basics

```lua

local vkv = require 'vkv'  

local key = 12345  

print(vkv.existed(key)) --false  

--init a value, paramters: version-key-value, that is why this lib named vkv

print(vkv.put(1, key, {b = {c = 1111}, [5] = 1})) -- true  

print(vkv.existed(key)) --true  

-- get two copy

local c1 = vkv.get_copy(key)  

local c2 = vkv.get_copy(key)  

c1.d = 1000  

c2.d = 2000  

print(vkv.set(key, c2)) --true  

--the copy c1 is out of date, so fail to update to the vkv

print(vkv.set(key, c1)) --false  

--the api set_test can test if a copy can commit

print(vkv.set_test(key, c1)) --false  

local c3 = vkv.get_copy(key)  

print(c3.d)  -- 2000  

print(vkv.version_of(key)) --2

print(vkv.version_of(c3))  --3

```

### Intercept the table functions

```lua

local vkv = require 'vkv'

local key = 12345

vkv.put(1, key, {b = {c = 1111}, [5] = 1}) -- true

local c = vkv.get_copy(key)

for k in pairs(c) do

    print(k)

end

--output:

--    __target_obj

vkv.intercept_G() --make pairs, ipairs, next, table.each etc. intercepted

for k in pairs(c) do

    print(k)

end

--output:

--    b

--    5

```