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annotate src/luan/modules/Rpc.luan @ 1120:e8fc6712b468

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luan Rpc uses luan.lib.rpc
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 07 Aug 2017 23:50:52 -0600
parents bae2d0c2576c
children ba4daf107e07
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 java()
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2 local RpcClient = require "java:luan.lib.rpc.RpcClient"
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3 local RpcServer = require "java:luan.lib.rpc.RpcServer"
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4 local RpcCall = require "java:luan.lib.rpc.RpcCall"
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5 local RpcResult = require "java:luan.lib.rpc.RpcResult"
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6 local RpcException = require "java:luan.lib.rpc.RpcException"
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7 local JavaRpc = require "java:luan.lib.rpc.Rpc"
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8 local JavaLuan = require "java:luan.Luan"
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9 local JavaUtils = require "java:luan.modules.Utils"
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10 local IoLuan = require "java:luan.modules.IoLuan"
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11 local ByteArrayInputStream = require "java:java.io.ByteArrayInputStream"
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12 local Luan = require "luan:Luan.luan"
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13 local error = Luan.error
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14 local set_metatable = Luan.set_metatable or error()
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15 local try = Luan.try or error()
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16 local ipairs = Luan.ipairs or error()
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17 local assert_table = Luan.assert_table or error()
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18 local type = Luan.type or error()
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19 local Io = require "luan:Io.luan"
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20 local Thread = require "luan:Thread.luan"
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21 local Table = require "luan:Table.luan"
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22 local unpack = Table.unpack or error()
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23 require "luan:logging/init.luan" -- initialize logging
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24 local Logging = require "luan:logging/Logging.luan"
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25 local logger = Logging.logger "Rpc"
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27
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28 local Rpc = {}
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29
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30 Rpc.port = 9101
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31
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32 local function java_args(list)
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33 for i,v in ipairs(list) do
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34 list[i] = JavaLuan.toJava(v)
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35 end
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36 return unpack(list)
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37 end
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38
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39 local function luan_args(list,binary_in)
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40 list = assert_table(list)
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41 for i,v in ipairs(list) do
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42 list[i] = JavaLuan.toLuan(v)
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43 end
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44 if binary_in ~= nil then
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45 local i_in = list[#list]
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46 list[#list] = nil
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47 local type = list[i_in]
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48 if type == "binary" then
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49 list[i_in] = JavaUtils.readAll(binary_in)
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50 elseif type == "input" then
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51 list[i_in] = IoLuan.LuanInput.new(binary_in).table()
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52 else
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53 error(type)
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54 end
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55 end
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56 return unpack(list)
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57 end
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58
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59 local function encode_binary(args)
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60 local binary_in, len_in, i_in
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61 for i,v in ipairs(args) do
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62 if type(v) == "binary" then
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63 binary_in==nil or error "can't have multiple binary args"
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64 i_in = i
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65 binary_in = ByteArrayInputStream.new(v)
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66 len_in = #v
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67 args[i] = "binary"
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68 elseif type(v) == "table" and v.java ~= nil and v.java.instanceof(IoLuan.LuanFile) then
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69 binary_in==nil or error "can't have multiple binary args"
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70 i_in = i
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71 binary_in = v.java.inputStream()
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72 len_in = v.length()
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73 args[i] = "input"
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74 end
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75 end
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76 args[#args+1] = i_in
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77 return binary_in, len_in
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78 end
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79
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80 function Rpc.caller(socket)
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81 local java_socket = socket.java.socket
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82 local client = RpcClient.new(java_socket)
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83 return function(fn_name,...)
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84 local args = {...}
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85 local binary_in, len_in = encode_binary(args)
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86 local call
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87 if binary_in == nil then
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88 call = RpcCall.new(fn_name,java_args(args))
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89 else
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90 call = RpcCall.new(binary_in,len_in,fn_name,java_args(args))
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91 end
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92 client.write(call)
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93 if fn_name == "close" then
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94 client.close()
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95 return
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96 end
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97 return try {
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98 function()
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99 local result = client.read()
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100 return luan_args(result.returnValues,result["in"])
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101 end
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102 catch = function(e)
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103 local cause = e.java.getCause()
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104 if cause ~= nil and cause.instanceof(RpcException) and cause.getMessage() == "luan" then
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105 error(cause.values.get(0))
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106 else
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107 e.throw()
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108 end
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109 end
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110 }
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111 end_function
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112 end_function
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113
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114 Rpc.functions = {}
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115
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116 function Rpc.responder(socket,fns)
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117 fns = fns or Rpc.functions
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118 local java_socket = socket.java.socket
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119 local server = RpcServer.new(java_socket)
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120 local responder = {}
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121 function responder.is_closed()
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122 return server.isClosed()
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123 end_function
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124 function responder.respond()
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125 local call = server.read()
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126 if call==nil then return end
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127 local cmd = call.cmd
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128 if cmd == "close" then
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129 server.close()
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130 return
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131 end_if
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132 local fn = fns[cmd]
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133 if fn == nil then
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134 server.write(JavaRpc.COMMAND_NOT_FOUND)
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135 return
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136 end_if
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137 local rtn = try {
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138 function()
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139 return {fn(luan_args(call.args,call["in"]))}
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140 end
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141 catch = function(e)
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142 logger.warn(e)
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143 local ex = RpcException.new("luan",e.get_message())
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144 server.write(ex)
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145 return nil
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146 end
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147 }
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148 if rtn==nil then return end
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149 local binary_in, len_in = encode_binary(rtn)
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150 local result
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151 if binary_in == nil then
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152 result = RpcResult.new(java_args(rtn))
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153 else
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154 result = RpcResult.new(binary_in,len_in,java_args(rtn))
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155 end
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156 server.write(result)
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157 end
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158 return responder
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159 end_function
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160
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161 function Rpc.remote_socket(socket_uri)
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162 local socket = Io.uri(socket_uri)
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163 local call = Rpc.caller(socket)
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164 local mt = {}
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165 function mt.__index(_,key)
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166 return function(...)
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167 return call(key,...)
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168 end
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169 end
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170 local t = {}
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171 set_metatable(t,mt)
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172 return t
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173 end_function
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174
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175 function Rpc.remote(domain)
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176 local socket = "socket:" .. domain .. ":" .. Rpc.port
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177 return Rpc.remote_socket(socket)
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178 end_function
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179
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180 function Rpc.serve(port,fns)
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181 local socket_server = Io.socket_server(port or Rpc.port)
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182 while true do
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183 try {
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184 function()
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185 local socket = socket_server()
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186 local function server()
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187 try {
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188 function()
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189 local responder = Rpc.responder(socket)
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190 while not responder.is_closed() do
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191 responder.respond()
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192 end
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193 end
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194 catch = function(e)
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195 logger.error(e)
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196 end
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197 }
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198 end
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199 Thread.fork(server)
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200 end
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201 catch = function(e)
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202 logger.error(e)
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203 end
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204 }
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205 end_while
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206 end_function
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207
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208 return Rpc