prosody
7a0a31c4f6c5
core/modulemanager.lua

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core/modulemanager.lua @ 4534:7a0a31c4f6c5

modulemanager, moduleapi: Replace hooks multitable with an event_handlers map stored in individual modules. Also adds module:hook_object_event() to hook events on any util.events compatible object.
author Matthew Wild <mwild1@gmail.com>
date Sun, 22 Jan 2012 18:49:11 +0000
parent 4533:c6480d17be1e
child 4535:d46e9ad4fe8a
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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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 logger = require "util.logger";
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10 local log = logger.init("modulemanager");
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11 local config = require "core.configmanager";
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12 local multitable_new = require "util.multitable".new;
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13 local st = require "util.stanza";
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14 local pluginloader = require "util.pluginloader";
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15
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16 local hosts = hosts;
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17 local prosody = prosody;
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18
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19 local loadfile, pcall, xpcall = loadfile, pcall, xpcall;
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20 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
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21 local pairs, ipairs = pairs, ipairs;
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22 local t_insert, t_concat = table.insert, table.concat;
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23 local type = type;
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24 local next = next;
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25 local rawget = rawget;
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26 local error = error;
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27 local tostring, tonumber = tostring, tonumber;
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28
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29 local debug_traceback = debug.traceback;
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30 local unpack, select = unpack, select;
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31 pcall = function(f, ...)
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32 local n = select("#", ...);
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33 local params = {...};
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34 return xpcall(function() return f(unpack(params, 1, n)) end, function(e) return tostring(e).."\n"..debug_traceback(); end);
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35 end
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36
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37 local array, set = require "util.array", require "util.set";
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38
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39 local autoload_modules = {"presence", "message", "iq", "offline"};
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40 local component_inheritable_modules = {"tls", "dialback", "iq"};
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41
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42 -- We need this to let modules access the real global namespace
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43 local _G = _G;
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44
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45 module "modulemanager"
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46
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47 local api = _G.require "core.moduleapi"; -- Module API container
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48
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49 local modulemap = { ["*"] = {} };
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51 local NULL = {};
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52
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53 -- Load modules when a host is activated
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54 function load_modules_for_host(host)
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55 local component = config.get(host, "core", "component_module");
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56
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57 local global_modules_enabled = config.get("*", "core", "modules_enabled");
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58 local global_modules_disabled = config.get("*", "core", "modules_disabled");
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59 local host_modules_enabled = config.get(host, "core", "modules_enabled");
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60 local host_modules_disabled = config.get(host, "core", "modules_disabled");
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62 if host_modules_enabled == global_modules_enabled then host_modules_enabled = nil; end
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63 if host_modules_disabled == global_modules_disabled then host_modules_disabled = nil; end
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64
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65 local global_modules = set.new(autoload_modules) + set.new(global_modules_enabled) - set.new(global_modules_disabled);
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66 if component then
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67 global_modules = set.intersection(set.new(component_inheritable_modules), global_modules);
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68 end
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69 local modules = (global_modules + set.new(host_modules_enabled)) - set.new(host_modules_disabled);
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70
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71 -- COMPAT w/ pre 0.8
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72 if modules:contains("console") then
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73 log("error", "The mod_console plugin has been renamed to mod_admin_telnet. Please update your config.");
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74 modules:remove("console");
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75 modules:add("admin_telnet");
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76 end
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77
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78 if component then
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79 load(host, component);
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80 end
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81 for module in modules do
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82 load(host, module);
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83 end
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84 end
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85 prosody.events.add_handler("host-activated", load_modules_for_host);
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86
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87 --- Private helpers ---
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88
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89 local function do_unload_module(host, name)
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90 local mod = get_module(host, name);
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91 if not mod then return nil, "module-not-loaded"; end
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92
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93 if module_has_method(mod, "unload") then
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94 local ok, err = call_module_method(mod, "unload");
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95 if (not ok) and err then
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96 log("warn", "Non-fatal error unloading module '%s' on '%s': %s", name, host, err);
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97 end
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98 end
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99
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100 for handler, event in pairs(mod.module.event_handlers) do
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101 event.object.remove_handler(event.name, handler);
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102 end
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103
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104 if mod.module.items then -- remove items
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105 for key,t in pairs(mod.module.items) do
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106 for i = #t,1,-1 do
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107 local value = t[i];
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108 t[i] = nil;
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109 hosts[host].events.fire_event("item-removed/"..key, {source = mod.module, item = value});
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110 end
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111 end
fbddc3ed0d09 modulemanager: Fire item-removed events on module unload.
Waqas Hussain <waqas20@gmail.com>
parents: 2072
diff changeset
112 end
1986
d4ba9d94eb74 modulemanager: Slightly rearranged code for more robust unloading of modules.
Waqas Hussain <waqas20@gmail.com>
parents: 1960
diff changeset
113 modulemap[host][name] = nil;
670
d5cf10b7fc44 Modulemanager: Basic modules can now be unloaded correctly
Waqas Hussain <waqas20@gmail.com>
parents: 637
diff changeset
114 return true;
439
6608ad3a72f3 is_loaded() and incomplete unload() for modules
Matthew Wild <mwild1@gmail.com>
parents: 438
diff changeset
115 end
6608ad3a72f3 is_loaded() and incomplete unload() for modules
Matthew Wild <mwild1@gmail.com>
parents: 438
diff changeset
116
4532
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
117 local function do_load_module(host, module_name)
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Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
118 if not (host and module_name) then
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
119 return nil, "insufficient-parameters";
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Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
120 elseif not hosts[host] then
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
121 return nil, "unknown-host";
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
122 end
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Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
123
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
124 if not modulemap[host] then
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Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
125 modulemap[host] = {};
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Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
126 end
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parents: 4531
diff changeset
127
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parents: 4531
diff changeset
128 if modulemap[host][module_name] then
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parents: 4531
diff changeset
129 log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
130 return nil, "module-already-loaded";
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parents: 4531
diff changeset
131 elseif modulemap["*"][module_name] then
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parents: 4531
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132 return nil, "global-module-already-loaded";
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parents: 4531
diff changeset
133 end
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parents: 4531
diff changeset
134
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parents: 4531
diff changeset
135
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parents: 4531
diff changeset
136 local mod, err = pluginloader.load_code(module_name);
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
137 if not mod then
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
138 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
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parents: 4531
diff changeset
139 return nil, err;
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
140 end
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parents: 4531
diff changeset
141
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parents: 4531
diff changeset
142 local _log = logger.init(host..":"..module_name);
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
143 local api_instance = setmetatable({ name = module_name, host = host, path = err,
4534
7a0a31c4f6c5 modulemanager, moduleapi: Replace hooks multitable with an event_handlers map stored in individual modules. Also adds module:hook_object_event() to hook events on any util.events compatible object.
Matthew Wild <mwild1@gmail.com>
parents: 4533
diff changeset
144 _log = _log, log = function (self, ...) return _log(...); end, event_handlers = {} }
4532
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
145 , { __index = api });
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
146
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
147 local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
148 api_instance.environment = pluginenv;
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parents: 4531
diff changeset
149
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parents: 4531
diff changeset
150 setfenv(mod, pluginenv);
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parents: 4531
diff changeset
151 hosts[host].modules = modulemap[host];
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
152 modulemap[host][module_name] = pluginenv;
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diff changeset
153
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parents: 4531
diff changeset
154 local ok, err = pcall(mod);
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parents: 4531
diff changeset
155 if ok then
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
156 -- Call module's "load"
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parents: 4531
diff changeset
157 if module_has_method(pluginenv, "load") then
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
158 ok, err = call_module_method(pluginenv, "load");
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
159 if not ok then
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
160 log("warn", "Error loading module '%s' on '%s': %s", module_name, host, err or "nil");
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
161 end
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
162 end
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
163
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
164 -- Use modified host, if the module set one
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
165 if api_instance.host == "*" and host ~= "*" then
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
166 modulemap[host][module_name] = nil;
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
167 modulemap["*"][module_name] = pluginenv;
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
168 api_instance:set_global();
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
169 end
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
170 else
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
171 log("error", "Error initializing module '%s' on '%s': %s", module_name, host, err or "nil");
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
172 do_unload_module(api_instance.host, module_name); -- Ignore error, module may be partially-loaded
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
173 end
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
174 return ok and mod, err;
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
175 end
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
176
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
177 local function do_reload_module(host, name)
745
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
178 local mod = get_module(host, name);
710
56f6c115bc69 modulemanager: Added reload support, with callbacks for saving and restoring state
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parents: 709
diff changeset
179 if not mod then return nil, "module-not-loaded"; end
56f6c115bc69 modulemanager: Added reload support, with callbacks for saving and restoring state
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parents: 709
diff changeset
180
1360
857034905016 modulemanager: Changed to use util.pluginloader
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parents: 1346
diff changeset
181 local _mod, err = pluginloader.load_code(name); -- checking for syntax errors
713
2afd6d9e21cd modulemanager: Check for syntax errors before reloading a module
Waqas Hussain <waqas20@gmail.com>
parents: 710
diff changeset
182 if not _mod then
1386
9132f16666e4 modulemanager: Fix copy/paste error, should be name instead of module_name
Matthew Wild <mwild1@gmail.com>
parents: 1378
diff changeset
183 log("error", "Unable to load module '%s': %s", name or "nil", err or "nil");
713
2afd6d9e21cd modulemanager: Check for syntax errors before reloading a module
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parents: 710
diff changeset
184 return nil, err;
2afd6d9e21cd modulemanager: Check for syntax errors before reloading a module
Waqas Hussain <waqas20@gmail.com>
parents: 710
diff changeset
185 end
2afd6d9e21cd modulemanager: Check for syntax errors before reloading a module
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parents: 710
diff changeset
186
710
56f6c115bc69 modulemanager: Added reload support, with callbacks for saving and restoring state
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parents: 709
diff changeset
187 local saved;
745
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diff changeset
188
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
189 if module_has_method(mod, "save") then
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
190 local ok, ret, err = call_module_method(mod, "save");
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parents: 733
diff changeset
191 if ok then
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
192 saved = ret;
710
56f6c115bc69 modulemanager: Added reload support, with callbacks for saving and restoring state
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diff changeset
193 else
4383
718445c040c4 modulemanager: Fix undefined global access in handling of module.save error handling.
Waqas Hussain <waqas20@gmail.com>
parents: 4381
diff changeset
194 log("warn", "Error saving module '%s:%s' state: %s", host, name, ret);
745
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
Matthew Wild <mwild1@gmail.com>
parents: 733
diff changeset
195 if not config.get(host, "core", "force_module_reload") then
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
196 log("warn", "Aborting reload due to error, set force_module_reload to ignore this");
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
197 return nil, "save-state-failed";
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
198 else
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
199 log("warn", "Continuing with reload (using the force)");
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
200 end
710
56f6c115bc69 modulemanager: Added reload support, with callbacks for saving and restoring state
Waqas Hussain <waqas20@gmail.com>
parents: 709
diff changeset
201 end
56f6c115bc69 modulemanager: Added reload support, with callbacks for saving and restoring state
Waqas Hussain <waqas20@gmail.com>
parents: 709
diff changeset
202 end
56f6c115bc69 modulemanager: Added reload support, with callbacks for saving and restoring state
Waqas Hussain <waqas20@gmail.com>
parents: 709
diff changeset
203
4532
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
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parents: 4531
diff changeset
204 do_unload_module(host, name);
d8dbf569766c modulemanager: Some reorganisation. Only external change is (should be) that module-unloaded and module-loaded are no longer fired when reloading a module, the new event module-reloaded is fired instead.
Matthew Wild <mwild1@gmail.com>
parents: 4531
diff changeset
205 local ok, err = do_load_module(host, name);
745
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
206 if ok then
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
207 mod = get_module(host, name);
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
208 if module_has_method(mod, "restore") then
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
Matthew Wild <mwild1@gmail.com>
parents: 733
diff changeset
209 local ok, err = call_module_method(mod, "restore", saved or {})
710
56f6c115bc69 modulemanager: Added reload support, with callbacks for saving and restoring state
Waqas Hussain <waqas20@gmail.com>
parents: 709
diff changeset
210 if (not ok) and err then
745
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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parents: 733
diff changeset
211 log("warn", "Error restoring module '%s' from '%s': %s", name, host, err);
710
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212 end
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213 end
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214 end
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215 return ok and mod, err;
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216 end
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217
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218 --- Public API ---
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219
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220 -- Load a module and fire module-loaded event
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221 function load(host, name)
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222 local mod, err = do_load_module(host, name);
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223 if mod then
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224 (hosts[mod.host] or prosody).events.fire_event("module-loaded", { module = module_name, host = host });
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225 end
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226 return mod, err;
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227 end
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228
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229 -- Unload a module and fire module-unloaded
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230 function unload(host, name)
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231 local ok, err = do_unload_module(host, name);
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232 if ok then
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233 (hosts[host] or prosody).events.fire_event("module-unloaded", { module = name, host = host });
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234 end
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235 return ok, err;
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236 end
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237
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238 function reload(host, name)
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239 local ok, err = do_reload_module(host, name);
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240 if ok then
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241 (hosts[host] or prosody).events.fire_event("module-reloaded", { module = name, host = host });
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242 elseif not is_loaded(host, name) then
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243 (hosts[host] or prosody).events.fire_event("module-unloaded", { module = name, host = host });
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244 end
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245 return ok, err;
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246 end
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247
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248 function get_module(host, name)
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249 return modulemap[host] and modulemap[host][name];
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250 end
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251
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252 function get_modules(host)
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253 return modulemap[host];
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254 end
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255
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256 function is_loaded(host, name)
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257 return modulemap[host] and modulemap[host][name] and true;
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258 end
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259
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260 function module_has_method(module, method)
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261 return type(module.module[method]) == "function";
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262 end
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263
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264 function call_module_method(module, method, ...)
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265 if module_has_method(module, method) then
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266 local f = module.module[method];
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267 return pcall(f, ...);
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268 else
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269 return false, "no-such-method";
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270 end
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271 end
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272
39
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diff changeset
273 return _M;