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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2017 John Spray <john.spray@redhat.com> | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | */ | |
13 | ||
14 | ||
15 | #pragma once | |
16 | ||
17 | // Python.h comes first because otherwise it clobbers ceph's assert | |
18 | #include "Python.h" | |
19 | ||
20 | #include <string> | |
21 | #include <map> | |
22 | #include <memory> | |
23 | ||
24 | #include "common/LogClient.h" | |
25 | ||
26 | #include "ActivePyModules.h" | |
27 | #include "StandbyPyModules.h" | |
28 | ||
29 | class PyModule | |
30 | { | |
31 | private: | |
32 | const std::string module_name; | |
33 | std::string get_site_packages(); | |
34 | ||
35 | public: | |
36 | SafeThreadState pMyThreadState; | |
37 | PyObject *pClass = nullptr; | |
38 | PyObject *pStandbyClass = nullptr; | |
39 | ||
40 | PyModule(const std::string &module_name_) | |
41 | : module_name(module_name_) | |
42 | { | |
43 | } | |
44 | ||
45 | ~PyModule(); | |
46 | ||
47 | int load(PyThreadState *pMainThreadState); | |
48 | ||
49 | std::string get_name() const { | |
50 | return module_name; | |
51 | } | |
52 | }; | |
53 | ||
54 | /** | |
55 | * This class is responsible for setting up the python runtime environment | |
56 | * and importing the python modules. | |
57 | * | |
58 | * It is *not* responsible for constructing instances of their BaseMgrModule | |
59 | * subclasses. | |
60 | */ | |
61 | class PyModuleRegistry | |
62 | { | |
63 | private: | |
64 | mutable Mutex lock{"PyModuleRegistry::lock"}; | |
65 | ||
66 | LogChannelRef clog; | |
67 | ||
68 | std::map<std::string, std::unique_ptr<PyModule>> modules; | |
69 | ||
70 | std::unique_ptr<ActivePyModules> active_modules; | |
71 | std::unique_ptr<StandbyPyModules> standby_modules; | |
72 | ||
73 | PyThreadState *pMainThreadState; | |
74 | ||
75 | // We have our own copy of MgrMap, because we are constructed | |
76 | // before ClusterState exists. | |
77 | MgrMap mgr_map; | |
78 | ||
79 | public: | |
80 | static std::string config_prefix; | |
81 | ||
82 | static void list_modules(std::set<std::string> *modules); | |
83 | ||
84 | PyModuleRegistry(LogChannelRef clog_) | |
85 | : clog(clog_) | |
86 | {} | |
87 | ||
88 | bool handle_mgr_map(const MgrMap &mgr_map_) | |
89 | { | |
90 | Mutex::Locker l(lock); | |
91 | ||
92 | bool modules_changed = mgr_map_.modules != mgr_map.modules; | |
93 | mgr_map = mgr_map_; | |
94 | ||
95 | if (standby_modules != nullptr) { | |
96 | standby_modules->handle_mgr_map(mgr_map_); | |
97 | } | |
98 | ||
99 | return modules_changed; | |
100 | } | |
101 | ||
102 | bool is_initialized() const | |
103 | { | |
104 | return mgr_map.epoch > 0; | |
105 | } | |
106 | ||
107 | int init(const MgrMap &map); | |
108 | ||
109 | void active_start( | |
110 | PyModuleConfig &config_, | |
111 | DaemonStateIndex &ds, ClusterState &cs, MonClient &mc, | |
112 | LogChannelRef clog_, Objecter &objecter_, Client &client_, | |
113 | Finisher &f); | |
114 | void standby_start( | |
115 | MonClient *monc); | |
116 | ||
117 | bool is_standby_running() const | |
118 | { | |
119 | return standby_modules != nullptr; | |
120 | } | |
121 | ||
122 | void active_shutdown(); | |
123 | void shutdown(); | |
124 | ||
125 | template<typename Callback, typename...Args> | |
126 | void with_active_modules(Callback&& cb, Args&&...args) const | |
127 | { | |
128 | Mutex::Locker l(lock); | |
129 | assert(active_modules != nullptr); | |
130 | ||
131 | std::forward<Callback>(cb)(*active_modules, std::forward<Args>(args)...); | |
132 | } | |
133 | ||
134 | // FIXME: breaking interface so that I don't have to go rewrite all | |
135 | // the places that call into these (for now) | |
136 | // >>> | |
137 | void notify_all(const std::string ¬ify_type, | |
138 | const std::string ¬ify_id) | |
139 | { | |
140 | if (active_modules) { | |
141 | active_modules->notify_all(notify_type, notify_id); | |
142 | } | |
143 | } | |
144 | ||
145 | void notify_all(const LogEntry &log_entry) | |
146 | { | |
147 | if (active_modules) { | |
148 | active_modules->notify_all(log_entry); | |
149 | } | |
150 | } | |
151 | ||
152 | std::vector<MonCommand> get_commands() const | |
153 | { | |
154 | assert(active_modules); | |
155 | return active_modules->get_commands(); | |
156 | } | |
157 | std::vector<ModuleCommand> get_py_commands() const | |
158 | { | |
159 | assert(active_modules); | |
160 | return active_modules->get_py_commands(); | |
161 | } | |
162 | void get_health_checks(health_check_map_t *checks) | |
163 | { | |
164 | assert(active_modules); | |
165 | active_modules->get_health_checks(checks); | |
166 | } | |
167 | std::map<std::string, std::string> get_services() const | |
168 | { | |
169 | assert(active_modules); | |
170 | return active_modules->get_services(); | |
171 | } | |
172 | // <<< (end of ActivePyModules cheeky call-throughs) | |
173 | }; |