skynet-zookeeper客户端

专为skynet开发的zookeeper客户端，版本：zookeeper-3.4.13

Test

1.先启动zookeeper服务器
2.配置
--Linux动态库，放入到luaclib文件夹
--(已提供源文件luaclib-src/lua-zookeeper.c，参考MakeFile配置)
luaclib/zookeeper.so
--skynet的service
service/zookeeper.lua
--导出api
lualib/zookeeper.lua

--测试代码
service/testzookeeper.lua

测试代码片段(skynet环境下测试)
```

local zookeeper  = require "zookeeper"

skynet.error("测试zookeeper")

zookeeper.set_log_stream("./zookeeper.log")
zookeeper.set_debug_level(zookeeper.ZOO_LOG_LEVEL_ERROR)

--regrister watcher event
skynet.error("注册监听watcher事件")
zookeeper.addwatcher("zookeeperwatcher")

skynet.error("zookeeper.client_id()=",zookeeper.client_id())
skynet.error("zookeeper.is_unrecoverable()=",zookeeper.is_unrecoverable())
skynet.error("zookeeper.recv_timeout()=",zookeeper.recv_timeout())
skynet.error("zookeeper.state()=",zookeeper.get_code_name(zookeeper.state()))
skynet.error("zookeeper.get_connected_host()=",zookeeper.get_connected_host())


local acls = {
    {
        perms = zookeeper.ZOO_PERM_ALL,
        scheme = "world",
        id = "anyone"
    }
}

local flags = 0
local watch = 1

----------------------------------------------
skynet.error("测试exists")
local eret = zookeeper.exists("/root", watch)
print_log(eret,"zookeeper.exists")

if eret.rc == zookeeper.ZNONODE then
    skynet.error("测试create")
    local cret = zookeeper.create("/root", "root_value", acls, flags)
    print_log(cret,"zookeeper.create")

    local path = cret.value
    eret = zookeeper.get(path, watch)
    print_log(eret,"zookeeper.get")

    assert(eret.rc == zookeeper.ZOK)
else
    assert(eret.rc == zookeeper.ZOK)
end

------------------------------------------------
skynet.error("测试set")
local version = eret.stat.version
local sret = zookeeper.set("/root", "set_value", version)
print_log(sret,"zookeeper.set")

skynet.error("测试get")
local gret = zookeeper.get("/root", watch)
print_log(gret,"zookeeper.get")

skynet.error("测试create child")
local cret = zookeeper.create("/root/child1", "child1_value", acls, flags)
print_log(cret,"zookeeper.create")
local cret = zookeeper.create("/root/child2", "child2_value", acls, flags)
print_log(cret,"zookeeper.create")

local gret = zookeeper.get_children("/root", watch)
print_log(gret,"zookeeper.get_children")
local gret = zookeeper.get_children2("/root", watch)
print_log(gret,"zookeeper.get_children2")

skynet.error("测试delete")
local version = gret.stat.version
local dret = zookeeper.delete("/root", version)
print_log(dret,"zookeeper.delete")
```

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skynet-zookeeper客户端

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