lua-resty-ssdb: A Lua repository from demlution

lua-resty-ssdb

The fastest lua client for ssdb and nginx (based on lua-nginx-module).

Ports

Nodejs ssdb client: https://github.com/eleme/node-ssdb
Python ssdb client: https://github.com/hit9/ssdb.py

Version

v0.0.4

Usage

Build and copy directory resty to your nginx's lua path:

$ git clone https://github.com/eleme/lua-resty-ssdb path/to/nginx/lua/resty/ssdb
$ cd path/to/nginx/lua/lua/resty/ssdb
$ git submodule update --init
$ make

lua path and lua cpath should be configured in your nginx conf like this:

lua_package_path 'path/to/nginx/lua/?.lua;';
lua_package_cpath 'path/to/nginx/lua/?.so;';

API Reference

Sample Usage

local ssdb = require('resty.ssdb.client')
local client = ssdb.newclient()
local res, err = client:set('k', 'v')
local res, err = client:get('k')

Pipeline

client:start_pipeline()
client:set('k1', 'v1')
client:set('k2', 'v2')
client:set('k3', 'v3')
vals = client:commit_pipeline()

Returns

err is not nil on any errors.
res is nil on any errors.

Value Types

Values returned from commands can be found from table commands in ssdb.lua.

Errors

All possible err values for all ssdb commands:

'ok', 'not_found', 'server_error', 'client_error', 'timeout', 'connection refused'

newclient(options)

To create a ssdb client:

local ssdb = require 'resty.ssdb.client'
local client = ssdb.newclient()

options (with default values):

{
    host = '127.0.0.1',
    port = 8888,
    auth = nil,  -- lazy auto authed
    timeout = 0
}

client:close()

Close from ssdb server.

client:start_pipeline()

Start pipeline.

client:commit_pipeline()

Commit pipeline to ssdb server, return table of multiple vals like {res, err}.

client:cancel_pipeline()

Cancel current pipeline.

client:setkeepalive(timeout, size)

See tcpsock:setkeepalive.

setkeepalive can be used to make a long connection, e.g., a forever long long connection:

client:setkeepalive(0, 1)

client:connect()

By default, ssdb is lazy connected, but method connect can be used to test if the server is alive, e.g.

ok, err = client.connect()
if not ok then
  ngx.log(ngx.ERR, err)
  return
end

Documentations

Detail docs for ssdb commands can be found at https://github.com/hit9/ssdb.api.docs.

demlution/lua-resty-ssdb