1 /*
2 * Copyright 2021 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #define LOG_TAG "BluetoothCounterMetrics"
17
18 #include "metrics/counter_metrics.h"
19
20 #include <bluetooth/log.h>
21
22 #include "common/bind.h"
23 #include "os/metrics.h"
24
25 namespace bluetooth {
26 namespace metrics {
27
28 const int COUNTER_METRICS_PERDIOD_MINUTES = 360; // Drain counters every 6 hours
29
__anon2080992e0102() 30 const ModuleFactory CounterMetrics::Factory = ModuleFactory([]() { return new CounterMetrics(); });
31
ListDependencies(ModuleList *) const32 void CounterMetrics::ListDependencies(ModuleList* /* list */) const {}
33
Start()34 void CounterMetrics::Start() {
35 alarm_ = std::make_unique<os::RepeatingAlarm>(GetHandler());
36 alarm_->Schedule(
37 common::Bind(&CounterMetrics::DrainBufferedCounters, bluetooth::common::Unretained(this)),
38 std::chrono::minutes(COUNTER_METRICS_PERDIOD_MINUTES));
39 log::info("Counter metrics initialized");
40 initialized_ = true;
41 }
42
Stop()43 void CounterMetrics::Stop() {
44 DrainBufferedCounters();
45 initialized_ = false;
46 alarm_->Cancel();
47 alarm_.reset();
48 log::info("Counter metrics canceled");
49 }
50
CacheCount(int32_t key,int64_t count)51 bool CounterMetrics::CacheCount(int32_t key, int64_t count) {
52 if (!IsInitialized()) {
53 log::warn("Counter metrics isn't initialized");
54 return false;
55 }
56 if (count <= 0) {
57 log::warn("count is not larger than 0. count: {}, key: {}", count, key);
58 return false;
59 }
60 int64_t total = 0;
61 std::lock_guard<std::mutex> lock(mutex_);
62 if (counters_.find(key) != counters_.end()) {
63 total = counters_[key];
64 }
65 if (LLONG_MAX - total < count) {
66 log::warn("Counter metric overflows. count {} current total: {} key: {}", count, total, key);
67 counters_[key] = LLONG_MAX;
68 return false;
69 }
70 counters_[key] = total + count;
71 return true;
72 }
73
Count(int32_t key,int64_t count)74 bool CounterMetrics::Count(int32_t key, int64_t count) {
75 if (!IsInitialized()) {
76 log::warn("Counter metrics isn't initialized");
77 return false;
78 }
79 if (count <= 0) {
80 log::warn("count is not larger than 0. count: {}, key: {}", count, key);
81 return false;
82 }
83 os::LogMetricBluetoothCodePathCounterMetrics(key, count);
84 return true;
85 }
86
DrainBufferedCounters()87 void CounterMetrics::DrainBufferedCounters() {
88 if (!IsInitialized()) {
89 log::warn("Counter metrics isn't initialized");
90 return;
91 }
92 std::lock_guard<std::mutex> lock(mutex_);
93 log::info("Draining buffered counters");
94 for (auto const& pair : counters_) {
95 Count(pair.first, pair.second);
96 }
97 counters_.clear();
98 }
99
100 } // namespace metrics
101 } // namespace bluetooth
102