prosody
3003d041c159
core/moduleapi.lua

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core/moduleapi.lua @ 6639:3003d041c159

moduleapi: Experimental API for modules to measure the rate+duration of events
author Matthew Wild <mwild1@gmail.com>
date Tue, 28 Apr 2015 13:52:07 +0100
parent 6556:74253c7beb9c
child 6640:859e9af53aa1
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2012 Matthew Wild
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3 -- Copyright (C) 2008-2012 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local config = require "core.configmanager";
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10 local modulemanager; -- This gets set from modulemanager
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11 local array = require "util.array";
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12 local set = require "util.set";
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13 local logger = require "util.logger";
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14 local pluginloader = require "util.pluginloader";
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15 local timer = require "util.timer";
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16 local resolve_relative_path = require"util.paths".resolve_relative_path;
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17 local measure = require "core.statsmanager".measure;
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18
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19 local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat;
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20 local error, setmetatable, type = error, setmetatable, type;
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21 local ipairs, pairs, select, unpack = ipairs, pairs, select, unpack;
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22 local tonumber, tostring = tonumber, tostring;
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23 local require = require;
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24
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25 local prosody = prosody;
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26 local hosts = prosody.hosts;
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27
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28 -- FIXME: This assert() is to try and catch an obscure bug (2013-04-05)
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29 local core_post_stanza = assert(prosody.core_post_stanza,
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30 "prosody.core_post_stanza is nil, please report this as a bug");
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31
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32 -- Registry of shared module data
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33 local shared_data = setmetatable({}, { __mode = "v" });
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34
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35 local NULL = {};
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36
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37 local api = {};
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38
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39 -- Returns the name of the current module
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40 function api:get_name()
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41 return self.name;
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42 end
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43
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44 -- Returns the host that the current module is serving
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45 function api:get_host()
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46 return self.host;
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47 end
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48
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49 function api:get_host_type()
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50 return (self.host == "*" and "global") or hosts[self.host].type or "local";
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51 end
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52
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53 function api:set_global()
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54 self.host = "*";
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55 -- Update the logger
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56 local _log = logger.init("mod_"..self.name);
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57 self.log = function (self, ...) return _log(...); end;
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58 self._log = _log;
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59 self.global = true;
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60 end
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61
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62 function api:add_feature(xmlns)
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63 self:add_item("feature", xmlns);
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64 end
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65 function api:add_identity(category, type, name)
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66 self:add_item("identity", {category = category, type = type, name = name});
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67 end
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68 function api:add_extension(data)
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69 self:add_item("extension", data);
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70 end
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71 function api:has_feature(xmlns)
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72 for _, feature in ipairs(self:get_host_items("feature")) do
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73 if feature == xmlns then return true; end
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74 end
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75 return false;
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76 end
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77 function api:has_identity(category, type, name)
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78 for _, id in ipairs(self:get_host_items("identity")) do
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79 if id.category == category and id.type == type and id.name == name then
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80 return true;
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81 end
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82 end
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83 return false;
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84 end
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85
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86 function api:fire_event(...)
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87 return (hosts[self.host] or prosody).events.fire_event(...);
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88 end
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89
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90 function api:hook_object_event(object, event, handler, priority)
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91 self.event_handlers:set(object, event, handler, true);
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92 return object.add_handler(event, handler, priority);
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93 end
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94
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95 function api:unhook_object_event(object, event, handler)
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96 return object.remove_handler(event, handler);
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97 end
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98
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99 function api:hook(event, handler, priority)
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100 return self:hook_object_event((hosts[self.host] or prosody).events, event, handler, priority);
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101 end
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102
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103 function api:hook_global(event, handler, priority)
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104 return self:hook_object_event(prosody.events, event, handler, priority);
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105 end
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106
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107 function api:hook_tag(xmlns, name, handler, priority)
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108 if not handler and type(name) == "function" then
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109 -- If only 2 options then they specified no xmlns
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110 xmlns, name, handler, priority = nil, xmlns, name, handler;
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111 elseif not (handler and name) then
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112 self:log("warn", "Error: Insufficient parameters to module:hook_stanza()");
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113 return;
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114 end
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115 return self:hook("stanza/"..(xmlns and (xmlns..":") or "")..name, function (data) return handler(data.origin, data.stanza, data); end, priority);
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116 end
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117 api.hook_stanza = api.hook_tag; -- COMPAT w/pre-0.9
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118
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119 function api:unhook(event, handler)
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120 return self:unhook_object_event((hosts[self.host] or prosody).events, event, handler);
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121 end
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122
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123 function api:require(lib)
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124 local f, n = pluginloader.load_code(self.name, lib..".lib.lua", self.environment);
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125 if not f then
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126 f, n = pluginloader.load_code(lib, lib..".lib.lua", self.environment);
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127 end
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128 if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message
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129 return f();
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130 end
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131
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132 function api:depends(name)
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133 if not self.dependencies then
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134 self.dependencies = {};
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135 self:hook("module-reloaded", function (event)
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136 if self.dependencies[event.module] and not self.reloading then
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137 self:log("info", "Auto-reloading due to reload of %s:%s", event.host, event.module);
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138 modulemanager.reload(self.host, self.name);
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139 return;
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140 end
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141 end);
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142 self:hook("module-unloaded", function (event)
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143 if self.dependencies[event.module] then
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144 self:log("info", "Auto-unloading due to unload of %s:%s", event.host, event.module);
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145 modulemanager.unload(self.host, self.name);
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146 end
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147 end);
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148 end
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149 local mod = modulemanager.get_module(self.host, name) or modulemanager.get_module("*", name);
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150 if mod and mod.module.host == "*" and self.host ~= "*"
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151 and modulemanager.module_has_method(mod, "add_host") then
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152 mod = nil; -- Target is a shared module, so we still want to load it on our host
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153 end
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154 if not mod then
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155 local err;
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156 mod, err = modulemanager.load(self.host, name);
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157 if not mod then
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158 return error(("Unable to load required module, mod_%s: %s"):format(name, ((err or "unknown error"):gsub("%-", " ")) ));
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159 end
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160 end
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161 self.dependencies[name] = true;
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162 return mod;
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163 end
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164
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165 -- Returns one or more shared tables at the specified virtual paths
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166 -- Intentionally does not allow the table at a path to be _set_, it
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167 -- is auto-created if it does not exist.
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168 function api:shared(...)
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169 if not self.shared_data then self.shared_data = {}; end
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170 local paths = { n = select("#", ...), ... };
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171 local data_array = {};
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172 local default_path_components = { self.host, self.name };
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173 for i = 1, paths.n do
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174 local path = paths[i];
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175 if path:sub(1,1) ~= "/" then -- Prepend default components
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176 local n_components = select(2, path:gsub("/", "%1"));
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177 path = (n_components<#default_path_components and "/" or "")..t_concat(default_path_components, "/", 1, #default_path_components-n_components).."/"..path;
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178 end
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179 local shared = shared_data[path];
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180 if not shared then
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181 shared = {};
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182 if path:match("%-cache$") then
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183 setmetatable(shared, { __mode = "kv" });
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184 end
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185 shared_data[path] = shared;
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186 end
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187 t_insert(data_array, shared);
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188 self.shared_data[path] = shared;
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189 end
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190 return unpack(data_array);
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191 end
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192
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193 function api:get_option(name, default_value)
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194 local value = config.get(self.host, name);
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195 if value == nil then
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196 value = default_value;
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197 end
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198 return value;
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199 end
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200
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201 function api:get_option_string(name, default_value)
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202 local value = self:get_option(name, default_value);
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203 if type(value) == "table" then
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204 if #value > 1 then
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205 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
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206 end
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207 value = value[1];
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208 end
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209 if value == nil then
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210 return nil;
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211 end
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212 return tostring(value);
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213 end
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214
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215 function api:get_option_number(name, ...)
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216 local value = self:get_option(name, ...);
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217 if type(value) == "table" then
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218 if #value > 1 then
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219 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
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220 end
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221 value = value[1];
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222 end
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223 local ret = tonumber(value);
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224 if value ~= nil and ret == nil then
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225 self:log("error", "Config option '%s' not understood, expecting a number", name);
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226 end
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227 return ret;
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228 end
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229
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230 function api:get_option_boolean(name, ...)
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231 local value = self:get_option(name, ...);
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232 if type(value) == "table" then
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233 if #value > 1 then
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234 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
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235 end
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236 value = value[1];
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237 end
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238 if value == nil then
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239 return nil;
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240 end
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241 local ret = value == true or value == "true" or value == 1 or nil;
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242 if ret == nil then
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243 ret = (value == false or value == "false" or value == 0);
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244 if ret then
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245 ret = false;
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246 else
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247 ret = nil;
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248 end
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249 end
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250 if ret == nil then
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251 self:log("error", "Config option '%s' not understood, expecting true/false", name);
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252 end
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253 return ret;
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254 end
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255
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256 function api:get_option_array(name, ...)
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257 local value = self:get_option(name, ...);
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258
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259 if value == nil then
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260 return nil;
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261 end
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262
4531
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263 if type(value) ~= "table" then
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264 return array{ value }; -- Assume any non-list is a single-item list
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265 end
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266
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267 return array():append(value); -- Clone
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268 end
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269
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270 function api:get_option_set(name, ...)
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271 local value = self:get_option_array(name, ...);
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272
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273 if value == nil then
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274 return nil;
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275 end
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276
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277 return set.new(value);
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278 end
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279
5527
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parents: 5526
diff changeset
280 function api:get_option_inherited_set(name, ...)
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281 local value = self:get_option_set(name, ...);
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parents: 5526
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282 local global_value = self:context("*"):get_option_set(name, ...);
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parents: 5526
diff changeset
283 if not value then
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parents: 5526
diff changeset
284 return global_value;
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parents: 5526
diff changeset
285 elseif not global_value then
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286 return value;
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287 end
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288 value:include(global_value);
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289 return value;
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diff changeset
290 end
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291
5526
d54011a23b20 moduleapi: Add module:context(host) to produce a fake API context for a given host (or global). module:context("*"):get_option("foo") to get global options.
Matthew Wild <mwild1@gmail.com>
parents: 5498
diff changeset
292 function api:context(host)
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parents: 5498
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293 return setmetatable({host=host or "*"}, {__index=self,__newindex=self});
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parents: 5498
diff changeset
294 end
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295
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296 function api:add_item(key, value)
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297 self.items = self.items or {};
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298 self.items[key] = self.items[key] or {};
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299 t_insert(self.items[key], value);
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300 self:fire_event("item-added/"..key, {source = self, item = value});
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301 end
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302 function api:remove_item(key, value)
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303 local t = self.items and self.items[key] or NULL;
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304 for i = #t,1,-1 do
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305 if t[i] == value then
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306 t_remove(self.items[key], i);
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307 self:fire_event("item-removed/"..key, {source = self, item = value});
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308 return value;
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diff changeset
309 end
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diff changeset
310 end
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311 end
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parents:
diff changeset
312
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parents:
diff changeset
313 function api:get_host_items(key)
5412
a5fcda77c6b1 moduleapi: have get_host_items wrap on get_items from modulemanager, also add has_{feature/identity} to the API.
Marco Cirillo <maranda@lightwitch.org>
parents: 5377
diff changeset
314 local result = modulemanager.get_items(key, self.host) or {};
4531
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315 return result;
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316 end
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diff changeset
317
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diff changeset
318 function api:handle_items(type, added_cb, removed_cb, existing)
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diff changeset
319 self:hook("item-added/"..type, added_cb);
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320 self:hook("item-removed/"..type, removed_cb);
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diff changeset
321 if existing ~= false then
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diff changeset
322 for _, item in ipairs(self:get_host_items(type)) do
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diff changeset
323 added_cb({ item = item });
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324 end
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diff changeset
325 end
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parents:
diff changeset
326 end
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parents:
diff changeset
327
4613
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
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parents: 4605
diff changeset
328 function api:provides(name, item)
5529
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
329 -- if not item then item = setmetatable({}, { __index = function(t,k) return rawget(self.environment, k); end }); end
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
330 if not item then
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
331 item = {}
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
332 for k,v in pairs(self.environment) do
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
333 if k ~= "module" then item[k] = v; end
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
334 end
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
335 end
4613
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diff changeset
336 if not item.name then
4660
96b40b5e8ea8 moduleapi: module:provides(): Fix usage of wrong table
Matthew Wild <mwild1@gmail.com>
parents: 4651
diff changeset
337 local item_name = self.name;
4613
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diff changeset
338 -- Strip a provider prefix to find the item name
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parents: 4605
diff changeset
339 -- (e.g. "auth_foo" -> "foo" for an auth provider)
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parents: 4605
diff changeset
340 if item_name:find(name.."_", 1, true) == 1 then
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
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parents: 4605
diff changeset
341 item_name = item_name:sub(#name+2);
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parents: 4605
diff changeset
342 end
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
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parents: 4605
diff changeset
343 item.name = item_name;
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
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parents: 4605
diff changeset
344 end
5530
d83482fc4a81 moduleapi: in module:provides(), add the name of the module in item._provided_by
Kim Alvefur <zash@zash.se>
parents: 5529
diff changeset
345 item._provided_by = self.name;
4661
76db5d0a2104 moduleapi: module:provides(): Add "-provider" onto the key name
Matthew Wild <mwild1@gmail.com>
parents: 4660
diff changeset
346 self:add_item(name.."-provider", item);
4613
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parents: 4605
diff changeset
347 end
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parents: 4605
diff changeset
348
4614
20940729c1b4 moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin
Matthew Wild <mwild1@gmail.com>
parents: 4613
diff changeset
349 function api:send(stanza)
20940729c1b4 moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin
Matthew Wild <mwild1@gmail.com>
parents: 4613
diff changeset
350 return core_post_stanza(hosts[self.host], stanza);
20940729c1b4 moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin
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parents: 4613
diff changeset
351 end
20940729c1b4 moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin
Matthew Wild <mwild1@gmail.com>
parents: 4613
diff changeset
352
4666
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
353 function api:add_timer(delay, callback)
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
354 return timer.add_task(delay, function (t)
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
355 if self.loaded == false then return; end
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
356 return callback(t);
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
357 end);
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
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parents: 4663
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358 end
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
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parents: 4663
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359
4790
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
diff changeset
360 local path_sep = package.config:sub(1,1);
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
diff changeset
361 function api:get_directory()
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362 return self.path and (self.path:gsub("%"..path_sep.."[^"..path_sep.."]*$", "")) or nil;
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parents: 4750
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363 end
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
364
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
diff changeset
365 function api:load_resource(path, mode)
6165
6a184b16b717 core.certmanager, core.moduleapi, mod_storage_sql, mod_storage_sql2: Import from util.paths
Kim Alvefur <zash@zash.se>
parents: 5825
diff changeset
366 path = resolve_relative_path(self:get_directory(), path);
4790
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
diff changeset
367 return io.open(path, mode);
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
368 end
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
369
5496
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
370 function api:open_store(name, type)
6414
31c15004bfb0 core.moduleapi: Use require instead of global to get storagemanager in module:open_store()
Kim Alvefur <zash@zash.se>
parents: 6165
diff changeset
371 return require"core.storagemanager".open(self.host, name or self.name, type);
5496
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
372 end
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
373
6556
74253c7beb9c moduleapi: Module API for statsmanager
Matthew Wild <mwild1@gmail.com>
parents: 6422
diff changeset
374 function api:measure(name, type)
74253c7beb9c moduleapi: Module API for statsmanager
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parents: 6422
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375 return measure(type, "/"..self.host.."/mod_"..self.name.."/"..name);
74253c7beb9c moduleapi: Module API for statsmanager
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parents: 6422
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376 end
74253c7beb9c moduleapi: Module API for statsmanager
Matthew Wild <mwild1@gmail.com>
parents: 6422
diff changeset
377
6639
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
378 function api:measure_object_event(events_object, event_name, stat_name)
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
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parents: 6556
diff changeset
379 local m = self:measure(stat_name or event_name, "duration");
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
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parents: 6556
diff changeset
380 local function handler(handlers, event_name, event_data)
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parents: 6556
diff changeset
381 local finished = m();
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parents: 6556
diff changeset
382 local ret = handlers(event_name, event_data);
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
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parents: 6556
diff changeset
383 finished();
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parents: 6556
diff changeset
384 return ret;
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
385 end
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
386 return self:hook_object_event(events_object, event_name, handler);
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
387 end
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
388
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
389 function api:measure_event(event_name, stat_name)
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
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parents: 6556
diff changeset
390 return self:hook_object_event((hosts[self.host] or prosody).events.wrappers, event_name, handler);
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
391 end
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
392
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
393 function api:measure_global_event(event_name, stat_name)
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
394 return self:hook_object_event(prosody.events.wrappers, event_name, handler);
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
395 end
3003d041c159 moduleapi: Experimental API for modules to measure the rate+duration of events
Matthew Wild <mwild1@gmail.com>
parents: 6556
diff changeset
396
6422
6d4d87a89026 core.module{manager,api}: Fix for 010b141e91ed (Thanks v1ct0r)
Kim Alvefur <zash@zash.se>
parents: 6415
diff changeset
397 function api.init(mm)
6415
010b141e91ed core.modulemanager, core.moduleapi: Hack around dependency loop
Kim Alvefur <zash@zash.se>
parents: 6414
diff changeset
398 modulemanager = mm;
010b141e91ed core.modulemanager, core.moduleapi: Hack around dependency loop
Kim Alvefur <zash@zash.se>
parents: 6414
diff changeset
399 return api;
010b141e91ed core.modulemanager, core.moduleapi: Hack around dependency loop
Kim Alvefur <zash@zash.se>
parents: 6414
diff changeset
400 end
6422
6d4d87a89026 core.module{manager,api}: Fix for 010b141e91ed (Thanks v1ct0r)
Kim Alvefur <zash@zash.se>
parents: 6415
diff changeset
401
6d4d87a89026 core.module{manager,api}: Fix for 010b141e91ed (Thanks v1ct0r)
Kim Alvefur <zash@zash.se>
parents: 6415
diff changeset
402 return api;