From 1d11788eba8b36d6f7fbf06cca4fd63c30010ed1 Mon Sep 17 00:00:00 2001 From: Coder12a <38924418+Coder12a@users.noreply.github.com> Date: Mon, 5 Nov 2018 20:05:04 -0600 Subject: [PATCH] Upload mod --- LICENSE | 520 +++++++++++++++++++++++++++++++++++++-- README-zh.md | 163 ------------- README.md | 163 +------------ colddb.lua | 629 ++++++++++++++++++++++++++++++++++++++++++++++++ db/.gitignore | 4 - depends.txt | 0 description.txt | 1 + flatdb.lua | 86 ------- init.lua | 8 + mod.conf | 1 + 10 files changed, 1146 insertions(+), 429 deletions(-) delete mode 100644 README-zh.md create mode 100644 colddb.lua delete mode 100644 db/.gitignore create mode 100644 depends.txt create mode 100644 description.txt delete mode 100644 flatdb.lua create mode 100644 init.lua create mode 100644 mod.conf diff --git a/LICENSE b/LICENSE index cf2954d..3cba0cc 100644 --- a/LICENSE +++ b/LICENSE @@ -1,22 +1,508 @@ -The MIT License (MIT) +Based on FlatDB(MIT) +--------------------------- +Copyright (C) 2018 Coder12a -Copyright (c) 2015 Peer Zeng + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. +[This is the first released version of the Lesser GPL. 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-它提供一个由Lua表构成的键值对存储系统。 - -FlatDB的使用情境 -=========== - -当您想使用SQLite存储一些数据，而不必用到SQL查询的时候，可以考虑使用FlatDB代替之。
-如果您的程序使用的语言恰好是Lua，或者嵌入了Lua作为扩展脚本的话，那么就尝试使用FlatDB来存储数据吧。 - -概念 -========== - -| FlatDB | 磁盘 | Lua | -|:--------------:|:------------:|:----------:| -| 数据库 | 目录 | 表 | -| 页（Page） | 文件 | 表 | -| 键值对 | 文件内容 | 键值对 | - -该表反映的是FlatDB、磁盘和Lua三个层面的对应关系。
-FlatDB将一个目录看作数据库，映射到一个Lua表上。 -该Lua表的下级也是一些Lua表，对应FlatDB的页（Page），它将被存储到数据库目录下同名的文件中。 -这些文件的内容正是页（Page）中的键值对，即Lua表序列化后的字符串。 -键值对中的键和值可以是Lua中所有能够被序列化的类型，即除了协程、用户数据、C数据和C函数外的类型。 - -用法 -========== - -将*flatdb.lua*文件复制到你的项目所在或存储Lua扩展库的目录中。
-然后在用到它的Lua文件中写上这句话： -```lua -local flatdb = require 'flatdb' -``` - -1. 将目录作为数据库映射到Lua表中 - - ```lua - local db = flatdb('./db') - ``` - -2. 打开或创建一个页（Page） - - ```lua - if not db.page then - db.page = {} - end - ``` - -3. 往页（Page）中写入键值对数据 - - ```lua - db.page.key = 'value' - -- equivalent to db.page['key'] = 'value' - ``` - -4. 读取页（Page）中的数据 - - ```lua - print(db.page.key) -- prints 'value' - ``` - -5. 将所有页（Page）数据保存在同名的文件中 - - ```lua - db:save() - -- 'page' will be saved to './db/page' - ``` - -更多用法可参考另一个项目[Ledis](https://github.com/uleelx/ledis)（一个使用FlatDB作为存储后端的Redis实现）。 - -范例概览 -========== - -```lua --- 这是一个以FlatDB作为存储引擎的日志系统例子 - -local flatdb = require("flatdb") - -local logger = flatdb("./log") - -local count = 0 - -local function common_log(logger, level, message) - local today = os.date("%Y-%m-%d") - if logger[today] == nil then logger[today] = {} end - if logger[today][level] == nil then logger[today][level] = {} end - table.insert(logger[today][level], { - timestamp = os.time(), - level = level, - message = message - }) - count = (count+1)%10 - if count == 0 then - logger:save() - end -end - -local levels = {"debug", "info", "warn", "error", "fatal"} - -for _, level in ipairs(levels) do - flatdb.hack[level] = function(logger, msg) - common_log(logger, level, msg) - end -end - -flatdb.hack.find = function(logger, level, date) - if logger[date or os.date("%Y-%m-%d")] then - return logger[date or os.date("%Y-%m-%d")][level] - end -end - -for i = 1, 10 do - logger:debug("This is a debug message.") - logger:info("This is an info message.") - logger:warn("This is a warn message.") - logger:error("This is an error message.") - logger:fatal("This is a fatal message.") -end - -local pp = require("pp") -- https://github.com/luapower/pp -pp(logger:find("error")) - -``` - -API -========== - -- **函数** - - - **flatdb(dir) --> db** - - 将一个目录dir映射成数据库对象。若目录不存在，返回nil。否则，返回一个数据库对象db（Lua表）。 - - - **db:save([page])** - - 将指定的页（Page）保存在文件中，若不指定则保存数据库对象中所有的页。参数*page*是指页的名称。 - -- **表** - - - **flatdb** - - 当数据库载入后，flatdb表的键值对有以下关系： - - *flatdb[dir] --> db* - - *flatdb[db] --> dir* - - - **flatdb.hack** - - hack表包含了数据库对象的所有方法。默认情况下，目前数据库对象只有一个db:save([page])方法。 - 该表一般用于扩展数据库对象方法。 - -依赖项 -======= - -- [lua-MessagePack](https://github.com/fperrad/lua-MessagePack) - -许可证 -======= - -FlatDB是在MIT许可证下发布的。 diff --git a/README.md b/README.md index de2dd6f..69529bd 100644 --- a/README.md +++ b/README.md @@ -1,159 +1,4 @@ -FlatDB -=========== - -FlatDB is a lua library that implements a serverless, zero-configuration, NoSQL database engine.
-It provides a key-value storage system using plain Lua tables. - -When To Use FlatDB -=========== - -When you want to use SQLite to store data, just take a glance at FlatDB.
-When Lua acts in your program as the major language or the embedded scripting language, just try using FlatDB. - -Concept -========== - -| FlatDB | Disk | Lua | -|:--------------:|:-------------:|:--------------:| -| Database | Directory | Table | -| Page | File | Table | -| Key-value pair | File content | Key-value pair | - -Keys and values can be all Lua types except coroutines, userdata, cdata and C functions. - -Usage -========== - -Copy *flatdb.lua* file to your project or where your lua libraries stored.
-Then write this in any Lua file where you want to use it: -```lua -local flatdb = require 'flatdb' -``` - -1. Bind a directory as a database - - ```lua - local db = flatdb('./db') - ``` - -2. Open or create a page - - ```lua - if not db.page then - db.page = {} - end - ``` - -3. Store key-value items - - ```lua - db.page.key = 'value' - -- equivalent to db.page['key'] = 'value' - ``` - -4. Retrieve items - - ```lua - print(db.page.key) -- prints 'value' - ``` - -5. Save to file - - ```lua - db:save() - -- 'page' will be saved to './db/page' - ``` - -More usage can be found in the [Ledis](https://github.com/uleelx/ledis)(an alternative of Redis server using FlatDB). - -Quick Look -========== - -```lua --- This is an logging system example using FlatDB - -local flatdb = require("flatdb") - -local logger = flatdb("./log") - -local count = 0 - -local function common_log(logger, level, message) - local today = os.date("%Y-%m-%d") - if logger[today] == nil then logger[today] = {} end - if logger[today][level] == nil then logger[today][level] = {} end - table.insert(logger[today][level], { - timestamp = os.time(), - level = level, - message = message - }) - count = (count+1)%10 - if count == 0 then - logger:save() - end -end - -local levels = {"debug", "info", "warn", "error", "fatal"} - -for _, level in ipairs(levels) do - flatdb.hack[level] = function(logger, msg) - common_log(logger, level, msg) - end -end - -flatdb.hack.find = function(logger, level, date) - if logger[date or os.date("%Y-%m-%d")] then - return logger[date or os.date("%Y-%m-%d")][level] - end -end - -for i = 1, 10 do - logger:debug("This is a debug message.") - logger:info("This is an info message.") - logger:warn("This is a warn message.") - logger:error("This is an error message.") - logger:fatal("This is a fatal message.") -end - -local pp = require("pp") -- https://github.com/luapower/pp -pp(logger:find("error")) - -``` - -API -========== - -- **Functions** - - - **flatdb(dir) --> db** - - Bind a directory as a database, returns nil if 'dir' doesn't exists. Otherwise, it returns a 'db' obeject. - - - **db:save([page])** - - Save all pages or the given page(if specified) contained in db to file. The 'page' argument is a string, the page's name. - -- **Tables** - - - **flatdb** - - When a db is loaded, there is two relations below: - - *flatdb[dir] --> db* - - *flatdb[db] --> dir* - - - **flatdb.hack** - - The 'hack' table contains db's methods. There is only one method 'save(db, page)' in it by default. - It is usually used to extend db methods. - -Dependencies -======= - -- [lua-MessagePack](https://github.com/fperrad/lua-MessagePack) - -License -======= - -FlatDB is distributed under the MIT license. +ColdDB +=========== + +ColdDB is a lua library that implements a serverless, zero-configuration, NoSQL database engine. \ No newline at end of file diff --git a/colddb.lua b/colddb.lua new file mode 100644 index 0000000..e1b1db9 --- /dev/null +++ b/colddb.lua @@ -0,0 +1,629 @@ +colddb = {} + +local ie = ... + +local function createDir(directory) + return minetest.mkdir(directory) +end + +function colddb.file_Exists(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local f = io.open(string.format("%s%s%s.cold",db.directory,t,name),"r") + if f ~= nil then + io.close(f) + return true + else + return false + end + return false +end + +function colddb.get_db(directory) + local directory = string.format("%s/%s",minetest.get_worldpath(),directory) + if not createDir(directory) then + error(string.format("%s is not a directory.",directory)) + end + db = { + global_tag = "", + directory = directory, + tags = {}, + mem_pool = {}, + indexes_pool = {}, + iterate_queue = {}, + indexes = false, + add_to_mem_pool = true, + } + return db +end + +function colddb.add_global_tag(db,tag) + local t = "" + if type(tag) == "table" then + for index in pairs(tag) do + t = string.format("%s%s/",t,index) + end + else + t = string.format("%s/",tag) + end + db.global_tag = string.format("%s%s",db.global_tag,t) + db.directory = string.format("%s/%s",db.directory,t) + if not createDir(db.directory) then + error(string.format("%s is not a directory.",db.directory)) + end +end + +function colddb.add_tag(db,name,tag) + local t = "" + if not db.tags[name] then + db.tags[name] = "" + end + if type(tag) == "table" then + for _index in pairs(tag) do + t = string.format("%s%s/",t,_index) + end + else + t = string.format("%s/",tag) + end + local test_path = string.format("%s%s%s",db.directory,db.tags[name],t) + if not createDir(test_path) then + error(string.format("%s is not a directory.",test_path)) + end + db.tags[name] = string.format("%s%s",db.tags[name],t) +end + +function colddb.get_tag(db,name) + if not name then + return "" + end + local tag = db.tags[name] + if tag then + return tag + end + return "" +end + +function colddb.remove_tag(db,name) + if db.tags[name] then + local delete_path = string.format("%s%s",db.directory,db.tags[name]) + local wc = delete_path:len() + delete_path = delete_path:sub(0,wc-1) + db.tags[name] = nil + local err,msg = os.remove(delete_path) + if err == nil and ie then + assert(ie, "Please add colddb to secure.trusted_mods in the settings") + local cmd = string.format("rmdir %s",delete_path) + ie.os.execute(cmd) + cmd = nil + end + end +end + +function colddb.delete_file(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local text = string.format("%s%s%s.cold",db.directory,t,name) + + local err,msg = os.remove(text) + if err == nil then + print(string.format("error removing db data %s error message: %s",text,msg)) + end +end + +function colddb.load_table(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local f = io.open(string.format("%s%s%s.cold",db.directory,t,name), "r") + if f then + local data = minetest.deserialize(f:read("*a")) + f:close() + return data + end + return nil +end + +function colddb.save_table(db,name, _table,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + return minetest.safe_file_write(string.format("%s%s%s.cold",db.directory,t,name), minetest.serialize(_table)) +end + +function colddb.save_key(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + return minetest.safe_file_write(string.format("%s%s%s.cold",db.directory,t,name), "") +end + +function colddb.load_key(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local f = io.open(string.format("%s%s%s.cold",db.directory,t,name), "r") + if f then + f:close() + return true + end + return false +end + +function colddb.delete_index_table(db,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local p = string.format("%s%sæIndex_table.cold",db.directory,t) + if colddb.file_Exists(db,name,tag_name) then + local err,msg = os.remove(p) + if err == nil then + print(string.format("error removing db data %s error message: %s",p,msg)) + end + return true + end + return false +end + +local function delete_lines_func_begin(args) + local f = io.open(args.copyfile, "w") + local db = args.db + local cs = args.cs + if f then + args.file = f + args.removedlist = {} + return args + end + return false +end + +local function delete_lines_func_i(line,i,args) + local f = args.file + local db = args.db + local cs = args.cs + local om = db.indexes_pool[args.cs] + if om and not om.deleted_items[line] then + f:write(string.format("\n%s",line)) + else + args.count = args.count - 1 + args.removedlist[line] = true + end +end + +local function delete_lines_func_end(args) + local db = args.db + local cs = args.cs + if db.indexes_pool[cs] or db.indexes_pool[cs].file then + db.indexes_pool[cs].file:close() + db.indexes_pool[cs].file = nil + args.file:seek("set") + args.file:write(string.format("%i",args.count)) + args.file:close() + os.remove(args.oldfile) + os.rename(args.copyfile, args.oldfile) + for i,l in pairs(args.removedlist) do + db.indexes_pool[cs].deleted_items[i] = nil + end + db.indexes_pool[cs].deleting = false + end + args = nil +end + +function colddb.delete_lines(db,_lines,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local f = db.indexes_pool[cs] + local k = type(_lines) + if k == "string" then + f.deleted_items[_lines] = true + else + for i,l in pairs(_lines) do + f.deleted_items[i] = true + end + end + if not db.indexes_pool[cs].deleting then + db.indexes_pool[cs].deleting = false + end + if f and f.file and not db.indexes_pool[cs].deleting then + db.indexes_pool[cs].deleting = true + if db.indexes_pool[cs].needs_flushing == true then + f.file:flush() + db.indexes_pool[cs].needs_flushing = false + end + local oldfile = string.format("%s%sæIndex_table.cold",db.directory,t) + local copyfile = string.format("%s%sæIndex_table.cold.replacer",db.directory,t) + local args = {db=db,cs=cs,oldfile=oldfile,copyfile=copyfile,do_not_skip_removed_items=true} + db.indexes_pool[cs] = f + colddb.iterate_index_table(db,delete_lines_func_begin,delete_lines_func_i,delete_lines_func_end,150,args,tag_name) + end +end + +function colddb.create_index_table(db,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local p = string.format("%s%sæIndex_table.cold",db.directory,t) + if not colddb.file_Exists(db,name,tag_name) then + local f = io.open(p, "w") + if f then + f:seek("set") + f:write("0") + f:close() + end + end + local f = io.open(p, "r+") + if f then + f:seek("set") + f:write("0") + db.indexes_pool[string.format("%s%s",t,name)] = {file = f,needs_flushing = false,deleted_items = {},iterating = false,inuse = false} + return true + end + return false +end + +function colddb.open_index_table(db,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local fs = db.indexes_pool[cs] + if not fs then + local p = string.format("%s%sæIndex_table.cold",db.directory,t) + if not colddb.file_Exists(db,name,tag_name) then + local f = io.open(p, "w") + if f then + f:seek("set") + f:write("0") + f:close() + end + end + local f = io.open(p, "r+") + if f then + db.indexes_pool[cs] = {file = f,needs_flushing = false,deleted_items = {},iterating = false,inuse = true} + return f + end + return nil + else + return fs.file + end + return nil +end + +function colddb.append_index_table(db,key,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local f = db.indexes_pool[cs] + local k = type(key) + if f and f.file and k == "string" then + local fl = f.file + if f.needs_flushing == true then + fl:flush() + end + db.indexes_pool[cs].needs_flushing = true + db.indexes_pool[cs].inuse = true + fl:seek("end") + fl:write(string.format("\n%s",key)) + fl:seek("set") + local count = tonumber(fl:read("*l")) + count = count + 1 + fl:seek("set") + fl:write(string.format("%i",count)) + elseif f and f.file then + local fl = f.file + if f.needs_flushing == true then + fl:flush() + end + db.indexes_pool[cs].needs_flushing = true + db.indexes_pool[cs].inuse = true + local c = 0 + for i in pairs(key) do + fl:seek("end") + fl:write(string.format("\n%s",i)) + c = c + 1 + end + fl:seek("set") + local count = tonumber(fl:read("*l")) + count = count + c + fl:seek("set") + fl:write(string.format("%i",count)) + else + return false + end +end + +function colddb.get_count(db,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local f = db.indexes_pool[cs] + if f and f.file then + local fl = f.file + if f.needs_flushing == true then + fl:flush() + f.needs_flushing = true + end + fl:seek("set") + local count = tonumber(fl:read("*l")) + db.indexes_pool[cs].inuse = true + return count + end + return nil +end + +local function iterate(db,func_on_iterate,end_func,cycles_per_tick,count,cs,args) + local f = db.indexes_pool[cs] + f.inuse = true + local fl = f.file + for i=1,cycles_per_tick do + if count < 1 then + break + end + local line = fl:read("*l") + if args.do_not_skip_removed_items or not db.indexes_pool[cs].deleted_items[line] then + func_on_iterate(line,i,args) + end + count = count - 1 + end + db.indexes_pool[cs] = f + if count < 1 then + if end_func then + end_func(args) + end + if db.iterate_queue[cs] and db.iterate_queue[cs][1] then + local copy = db.iterate_queue[cs][1] + if copy.begin_func then + local a = copy.begin_func(copy.args) + if a and type(a) == "table" then + copy.args = a + end + end + minetest.after(0,iterate,copy.db,copy.func_on_iterate,copy.end_func,copy.cycles_per_tick,copy.count,copy.cs,copy.args) + table.remove(db.iterate_queue[cs],1) + return true + else + db.iterate_queue[cs] = nil + end + db.indexes_pool[cs].iterating = false + return true + end + minetest.after(0,iterate,db,func_on_iterate,end_func,cycles_per_tick,count,cs,args) +end + +function colddb.iterate_index_table(db,begin_func,func_on_iterate,end_func,cycles_per_tick,args,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local f = db.indexes_pool[cs] + if not f or not f.file then + colddb.open_index_table(db,tag_name) + f = db.indexes_pool[cs] + end + if f and f.file and db.indexes_pool[cs].iterating == false then + -- set inuse and iterating to true + db.indexes_pool[cs].inuse = true + db.indexes_pool[cs].iterating = true + local fl = f.file + if f.needs_flushing == true then + fl:flush() + f.needs_flushing = true + end + -- Get count + fl:seek("set") + local c = tonumber(fl:read("*l")) + if c < 1 then + -- If theres nothing to index then return + return false + end + if not args then + args = {} + end + args.count = c + -- Run the begin function + if begin_func then + local a = begin_func(args) + if a and type(a) == "table" then + args = a + end + end + -- Start iterating the index table + iterate(db,func_on_iterate,end_func,cycles_per_tick,c,cs,args) + elseif f and f.file then + -- If its iterating some other function then add this one to the queue list + fl:seek("set") + local c = tonumber(fl:read("*l")) + if c < 1 then + -- If theres nothing to index then return + return false + end + if not db.iterate_queue[cs] then + db.iterate_queue[cs] = {} + end + local _table = {db=db,begin_func=begin_func,func_on_iterate=func_on_iterate,end_func=end_func,cycles_per_tick=cycles_per_tick,count=c,cs=cs,tag_name=tag_name,args=args} + table.insert(db.iterate_queue[cs],_table) + end +end + +local function check_use(db,name,tag_name,d) + if not d then + d = 0 + end + local delay = 30 + d + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + if not db.mem_pool or not db.mem_pool[cs] then + return false + end + if db.mem_pool[cs].inuse == false then + if db.mem_pool[cs].indexes == true then + local cs2 = string.format("%s%s",t,"æIndex_table") + local fs = db.indexes_pool[cs2] + if fs and fs.file then + if fs.inuse == true or fs.iterating == true then + db.indexes_pool[cs2].inuse = false + minetest.after(delay,check_use,name,tag_name,delay,d) + return false + else + fs.file:close() + db.indexes_pool[cs2] = nil + end + end + end + db.mem_pool[cs] = nil + else + db.mem_pool[cs].inuse = false + minetest.after(delay,check_use,name,tag_name,delay,d) + return false + end +end + +local function load_into_mem(db,name,_table,tag_name) + if db.add_to_mem_pool then + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + if not db.mem_pool[cs] then + db.mem_pool[cs] = {mem = {},inuse = false,check_timer = false,indexes = db.indexes} + end + db.mem_pool[cs].mem = _table + if not db.mem_pool[cs].check_timer then + db.mem_pool[cs].inuse = false + db.mem_pool[cs].indexes = db.indexes + db.mem_pool[cs].check_timer = true + check_use(db,name,tag_name) + end + end +end + +function colddb.set(db,name,_table,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + if db.indexes and not colddb.file_Exists(db,name,tag_name) then + local cs2 = string.format("%s%s",t,"æIndex_table") + local om = db.indexes_pool[cs2] + if not colddb.file_Exists(db,"æIndex_table",tag_name) or not (om and om.file) then + colddb.open_index_table(db,tag_name) + end + minetest.after(0,function(db,name,tag_name)colddb.append_index_table(db,name,tag_name)end,db,name,tag_name) + end + minetest.after(1,function(db,name, _table,tag_name)colddb.save_table(db,name, _table,tag_name)end,db,name, _table,tag_name) + local cs = string.format("%s%s",t,name) + if db.add_to_mem_pool and not (db.mem_pool or db.mem_pool[cs]) then + db.mem_pool[cs] = {mem = {},inuse = false,check_timer = false,indexes = db.indexes} + load_into_mem(db,name,_table,tag_name) + end +end + +function colddb.set_key(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + if db.indexes and not colddb.file_Exists(db,name,tag_name) then + local cs2 = string.format("%s%s",t,"æIndex_table") + local om = db.indexes_pool[cs2] + if not colddb.file_Exists(db,"æIndex_table",tag_name) or not (om and om.file) then + colddb.open_index_table(db,tag_name) + end + minetest.after(0,function(db,name,tag_name)colddb.append_index_table(db,name,tag_name)end,db,name,tag_name) + end + minetest.after(1,function(db,name, tag_name)colddb.save_key(db,name, tag_name)end,db,name, tag_name) + local cs = string.format("%s%s",t,name) + if db.add_to_mem_pool and not (db.mem_pool or db.mem_pool[cs]) then + db.mem_pool[cs] = {mem = {},inuse = false,check_timer = false,indexes = db.indexes} + load_into_mem(db,name,_table,tag_name) + end +end + +function colddb.get(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local pm = db.mem_pool[cs] + if pm then + db.mem_pool[cs].inuse = true + return pm.mem + else + local _table = colddb.load_table(db,name,tag_name) + if _table then + load_into_mem(db,name,_table,tag_name) + return _table + end + end + return nil +end + +function colddb.get_key(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local pm = db.mem_pool[cs] + if pm then + db.mem_pool[cs].inuse = true + return true + else + local bool = colddb.load_key(db,name,tag_name) + if bool then + load_into_mem(db,name,bool,tag_name) + return bool + end + end + return nil +end + +function colddb.remove(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + if db.mem_pool and db.mem_pool[cs] then + db.mem_pool[cs] = nil + end + if db.indexes and colddb.file_Exists(db,"æIndex_table",tag_name) then + local cs2 = string.format("%s%s",t,"æIndex_table") + local om = db.indexes_pool[cs2] + if not om and not om.file then + colddb.open_index_table(db,tag_name) + end + colddb.delete_lines(db,name,tag_name) + end + minetest.after(0,function(db,name,tag_name)colddb.delete_file(db,name,tag_name)end,db,name,tag_name) +end \ No newline at end of file diff --git a/db/.gitignore b/db/.gitignore deleted file mode 100644 index 5e7d273..0000000 --- a/db/.gitignore +++ /dev/null @@ -1,4 +0,0 @@ -# Ignore everything in this directory -* -# Except this file -!.gitignore diff --git a/depends.txt b/depends.txt new file mode 100644 index 0000000..e69de29 diff --git a/description.txt b/description.txt new file mode 100644 index 0000000..9934151 --- /dev/null +++ b/description.txt @@ -0,0 +1 @@ +pure lua No-sql database mod. \ No newline at end of file diff --git a/flatdb.lua b/flatdb.lua deleted file mode 100644 index 60916f5..0000000 --- a/flatdb.lua +++ /dev/null @@ -1,86 +0,0 @@ -local mp = require("MessagePack") - -local function isFile(path) - local f = io.open(path, "r") - if f then - f:close() - return true - end - return false -end - -local function isDir(path) - path = string.gsub(path.."/", "//", "/") - local ok, err, code = os.rename(path, path) - if ok or code == 13 then - return true - end - return false -end - -local function load_page(path) - local ret - local f = io.open(path, "rb") - if f then - ret = mp.unpack(f:read("*a")) - f:close() - end - return ret -end - -local function store_page(path, page) - if type(page) == "table" then - local f = io.open(path, "wb") - if f then - f:write(mp.pack(page)) - f:close() - return true - end - end - return false -end - -local pool = {} - -local db_funcs = { - save = function(db, p) - if p then - if type(p) == "string" and type(db[p]) == "table" then - return store_page(pool[db].."/"..p, db[p]) - else - return false - end - end - for p, page in pairs(db) do - if not store_page(pool[db].."/"..p, page) then - return false - end - end - return true - end -} - -local mt = { - __index = function(db, k) - if db_funcs[k] then return db_funcs[k] end - if isFile(pool[db].."/"..k) then - db[k] = load_page(pool[db].."/"..k) - end - return rawget(db, k) - end -} - -pool.hack = db_funcs - -return setmetatable(pool, { - __mode = "kv", - __call = function(pool, path) - assert(isDir(path), path.." is not a directory.") - if pool[path] then return pool[path] end - local db = {} - setmetatable(db, mt) - pool[path] = db - pool[db] = path - return db - end -}) diff --git a/init.lua b/init.lua new file mode 100644 index 0000000..bc7e835 --- /dev/null +++ b/init.lua @@ -0,0 +1,8 @@ +modpath = minetest.get_modpath("colddb") + +local ie = minetest.request_insecure_environment() +if ie then + loadfile(modpath .. "/colddb.lua")(ie) +else + dofile(modpath .. "/colddb.lua") +end \ No newline at end of file diff --git a/mod.conf b/mod.conf new file mode 100644 index 0000000..6c7c4a7 --- /dev/null +++ b/mod.conf @@ -0,0 +1 @@ +name = colddb \ No newline at end of file