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
|
// Copyright 2015 The Weave Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "examples/daemon/common/daemon.h"
#include <weave/device.h>
#include <weave/provider/task_runner.h>
#include <base/bind.h>
#include <base/memory/weak_ptr.h>
namespace {
const char kTraits[] = R"({
"_sample": {
"commands": {
"_hello": {
"minimalRole": "user",
"parameters": {
"_name": { "type": "string" }
}
},
"_ping": {
"minimalRole": "user"
},
"_countdown": {
"minimalRole": "user",
"parameters": {
"_seconds": {
"type": "integer",
"minimum": 1,
"maximum": 25
}
}
}
},
"state": {
"_ping_count": { "type": "integer" }
}
}
})";
const char kComponent[] = "sample";
} // anonymous namespace
// SampleHandler is a command handler example.
// It implements the following commands:
// - _hello: handle a command with an argument and set its results.
// - _ping: update device state.
// - _countdown: handle long running command and report progress.
class SampleHandler {
public:
SampleHandler(weave::provider::TaskRunner* task_runner)
: task_runner_{task_runner} {}
void Register(weave::Device* device) {
device_ = device;
device->AddTraitDefinitionsFromJson(kTraits);
CHECK(device->AddComponent(kComponent, {"_sample"}, nullptr));
CHECK(device->SetStatePropertiesFromJson(
kComponent, R"({"_sample": {"_ping_count": 0}})", nullptr));
device->AddCommandHandler(kComponent, "_sample._hello",
base::Bind(&SampleHandler::OnHelloCommand,
weak_ptr_factory_.GetWeakPtr()));
device->AddCommandHandler(kComponent, "_sample._ping",
base::Bind(&SampleHandler::OnPingCommand,
weak_ptr_factory_.GetWeakPtr()));
device->AddCommandHandler(kComponent, "_sample._countdown",
base::Bind(&SampleHandler::OnCountdownCommand,
weak_ptr_factory_.GetWeakPtr()));
}
private:
void OnHelloCommand(const std::weak_ptr<weave::Command>& command) {
auto cmd = command.lock();
if (!cmd)
return;
LOG(INFO) << "received command: " << cmd->GetName();
const auto& params = cmd->GetParameters();
std::string name;
if (!params.GetString("_name", &name)) {
weave::ErrorPtr error;
weave::Error::AddTo(&error, FROM_HERE, "example",
"invalid_parameter_value", "Name is missing");
cmd->Abort(error.get(), nullptr);
return;
}
base::DictionaryValue result;
result.SetString("_reply", "Hello " + name);
cmd->Complete(result, nullptr);
LOG(INFO) << cmd->GetName() << " command finished: " << result;
}
void OnPingCommand(const std::weak_ptr<weave::Command>& command) {
auto cmd = command.lock();
if (!cmd)
return;
LOG(INFO) << "received command: " << cmd->GetName();
device_->SetStateProperty(kComponent, "_sample._ping_count",
base::FundamentalValue{++ping_count_}, nullptr);
LOG(INFO) << "New state: " << device_->GetState();
base::DictionaryValue result;
cmd->Complete(result, nullptr);
LOG(INFO) << cmd->GetName() << " command finished: " << result;
}
void OnCountdownCommand(const std::weak_ptr<weave::Command>& command) {
auto cmd = command.lock();
if (!cmd)
return;
LOG(INFO) << "received command: " << cmd->GetName();
const auto& params = cmd->GetParameters();
int seconds;
if (!params.GetInteger("_seconds", &seconds))
seconds = 10;
LOG(INFO) << "starting countdown";
DoTick(cmd, seconds);
}
void DoTick(const std::weak_ptr<weave::Command>& command, int seconds) {
auto cmd = command.lock();
if (!cmd)
return;
if (seconds > 0) {
const auto& params = cmd->GetParameters();
std::string todo;
params.GetString("_todo", &todo);
LOG(INFO) << "countdown tick: " << seconds << " seconds left";
base::DictionaryValue progress;
progress.SetInteger("_seconds_left", seconds);
cmd->SetProgress(progress, nullptr);
task_runner_->PostDelayedTask(
FROM_HERE,
base::Bind(&SampleHandler::DoTick, weak_ptr_factory_.GetWeakPtr(),
command, --seconds),
base::TimeDelta::FromSeconds(1));
return;
}
base::DictionaryValue result;
cmd->Complete(result, nullptr);
LOG(INFO) << "countdown finished";
LOG(INFO) << cmd->GetName() << " command finished: " << result;
}
weave::Device* device_{nullptr};
weave::provider::TaskRunner* task_runner_{nullptr};
int ping_count_{0};
base::WeakPtrFactory<SampleHandler> weak_ptr_factory_{this};
};
int main(int argc, char** argv) {
Daemon::Options opts;
if (!opts.Parse(argc, argv)) {
Daemon::Options::ShowUsage(argv[0]);
return 1;
}
Daemon daemon{opts};
SampleHandler handler{daemon.GetTaskRunner()};
handler.Register(daemon.GetDevice());
daemon.Run();
return 0;
}
|
