1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
#include "common.hh"
#include <unordered_set>
#include "blissful_monitor.hh"
#include "clock.hh"
#include "looper.hh"
#include "observers.hh"
namespace {
#if FAKE_MONITOR
static const double JOB_EXPIRE_S = 1 * 60.0; // 1 min
#else
static const double JOB_EXPIRE_S = 10 * 60.0; // 10 min
#endif
class BlissfulMonitorImpl : public BlissfulMonitor, private Monitor::Observer {
public:
BlissfulMonitorImpl(std::shared_ptr<Looper> const& looper,
std::unique_ptr<Monitor>&& monitor)
: looper_(looper), monitor_(std::move(monitor)), timer_(0) {
monitor_->add_observer(this);
}
~BlissfulMonitorImpl() override {
if (timer_) {
looper_->cancel(timer_);
}
monitor_->remove_observer(this);
}
void connect(std::string const& netname, std::string const& scheduler,
uint16_t port) override {
monitor_->connect(netname, scheduler, port);
}
void disconnect() override {
monitor_->disconnect();
if (timer_) {
looper_->cancel(timer_);
timer_ = 0;
}
}
size_t machines() const override {
return monitor_->machines();
}
uint32_t id(size_t index) const override {
return monitor_->id(index);
}
Machine machine_at(size_t index) const override {
return monitor_->machine_at(index);
}
Machine machine(uint32_t id) const override {
return monitor_->machine(id);
}
void add_observer(Monitor::Observer* observer) override {
observers_.add(observer);
}
void remove_observer(Monitor::Observer* observer) override {
observers_.remove(observer);
}
#if FAKE_MONITOR
void toggle_fakes() override {
monitor_->toggle_fakes();
}
#endif
private:
struct Job {
uint32_t source;
uint32_t target;
double start;
Job(uint32_t source, uint32_t target)
: source(source), target(target), start(clk::steady()) {
}
};
void state(Monitor* monitor, State state) override {
assert(monitor == monitor_.get());
auto observer = observers_.first();
while (observer) {
observer->state(this, state);
observer = observers_.next();
}
}
void added_machine(Monitor* monitor, uint32_t id) override {
assert(monitor == monitor_.get());
known_machines_.insert(id);
auto observer = observers_.first();
while (observer) {
observer->added_machine(this, id);
observer = observers_.next();
}
}
void updated_machine(Monitor* monitor, uint32_t id) override {
assert(monitor == monitor_.get());
auto observer = observers_.first();
while (observer) {
observer->updated_machine(this, id);
observer = observers_.next();
}
}
void removed_machine(Monitor* monitor, uint32_t id) override {
assert(monitor == monitor_.get());
known_machines_.erase(id);
auto it = active_jobs_.begin();
while (it != active_jobs_.end()) {
if (it->target == id || it->source == id) {
// Remove active jobs linked to removed machine
notify_removed_job(it->source, it->target);
it = active_jobs_.erase(it);
} else {
++it;
}
}
auto observer = observers_.first();
while (observer) {
observer->removed_machine(this, id);
observer = observers_.next();
}
}
void added_job(Monitor* monitor, uint32_t source_id,
uint32_t target_id) override {
assert(monitor == monitor_.get());
if (known_machines_.count(source_id) == 0
|| (source_id != target_id && known_machines_.count(target_id) == 0)) {
// Unknown machine listed for job, ignore
return;
}
if (!timer_) {
timer_ = looper_->schedule(JOB_EXPIRE_S,
std::bind(&BlissfulMonitorImpl::check_jobs, this,
std::placeholders::_1,
std::placeholders::_2));
}
active_jobs_.emplace_back(source_id, target_id);
auto observer = observers_.first();
while (observer) {
observer->added_job(this, source_id, target_id);
observer = observers_.next();
}
}
void removed_job(Monitor* monitor, uint32_t source_id,
uint32_t target_id) override {
assert(monitor == monitor_.get());
for (auto it = active_jobs_.begin(); it != active_jobs_.end(); ++it) {
if (it->target == target_id && it->source == source_id) {
notify_removed_job(it->source, it->target);
active_jobs_.erase(it);
return;
}
}
// Unknown job removed
}
void notify_removed_job(uint32_t source_id, uint32_t target_id) {
auto observer = observers_.first();
while (observer) {
observer->removed_job(this, source_id, target_id);
observer = observers_.next();
}
}
void check_jobs(Looper* looper, uint32_t id) {
assert(looper_.get() == looper);
assert(timer_ == id);
auto const expired = clk::steady() - JOB_EXPIRE_S;
auto next = 0.0;
auto it = active_jobs_.begin();
while (it != active_jobs_.end()) {
if (it->start <= expired) {
notify_removed_job(it->source, it->target);
it = active_jobs_.erase(it);
} else {
next = it->start;
break;
}
}
if (active_jobs_.empty()) {
timer_ = 0;
} else {
timer_ = looper_->schedule(next - expired,
std::bind(&BlissfulMonitorImpl::check_jobs, this,
std::placeholders::_1,
std::placeholders::_2));
}
}
std::shared_ptr<Looper> looper_;
std::unique_ptr<Monitor> monitor_;
Observers<Monitor::Observer> observers_;
std::unordered_set<uint32_t> known_machines_;
std::vector<Job> active_jobs_;
uint32_t timer_;
};
} // namespace
// static
std::unique_ptr<Monitor> BlissfulMonitor::create(
std::shared_ptr<Looper> const& looper, std::unique_ptr<Monitor>&& monitor) {
return std::make_unique<BlissfulMonitorImpl>(looper, std::move(monitor));
}
|
