1 /*
2 * Copyright (C) 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
ListDependencies(ModuleList *) const30 void CounterMetrics::ListDependencies(ModuleList* /* list */) const {}
31
Start()32 void CounterMetrics::Start() {
33 alarm_ = std::make_unique<os::RepeatingAlarm>(GetHandler());
34 alarm_->Schedule(
35 common::Bind(&CounterMetrics::DrainBufferedCounters, bluetooth::common::Unretained(this)),
36 std::chrono::minutes(COUNTER_METRICS_PERDIOD_MINUTES));
37 log::info("Counter metrics initialized");
38 initialized_ = true;
39 }
40
Stop()41 void CounterMetrics::Stop() {
42 DrainBufferedCounters();
43 initialized_ = false;
44 alarm_->Cancel();
45 alarm_.reset();
46 log::info("Counter metrics canceled");
47 }
48
CacheCount(int32_t key,int64_t count)49 bool CounterMetrics::CacheCount(int32_t key, int64_t count) {
50 if (!IsInitialized()) {
51 log::warn("Counter metrics isn't initialized");
52 return false;
53 }
54 if (count <= 0) {
55 log::warn("count is not larger than 0. count: {}, key: {}", count, key);
56 return false;
57 }
58 int64_t total = 0;
59 std::lock_guard<std::mutex> lock(mutex_);
60 if (counters_.find(key) != counters_.end()) {
61 total = counters_[key];
62 }
63 if (LLONG_MAX - total < count) {
64 log::warn("Counter metric overflows. count {} current total: {} key: {}", count, total, key);
65 counters_[key] = LLONG_MAX;
66 return false;
67 }
68 counters_[key] = total + count;
69 return true;
70 }
71
Count(int32_t key,int64_t count)72 bool CounterMetrics::Count(int32_t key, int64_t count) {
73 if (!IsInitialized()) {
74 log::warn("Counter metrics isn't initialized");
75 return false;
76 }
77 if (count <= 0) {
78 log::warn("count is not larger than 0. count: {}, key: {}", count, key);
79 return false;
80 }
81 os::LogMetricBluetoothCodePathCounterMetrics(key, count);
82 return true;
83 }
84
DrainBufferedCounters()85 void CounterMetrics::DrainBufferedCounters() {
86 if (!IsInitialized()) {
87 log::warn("Counter metrics isn't initialized");
88 return;
89 }
90 std::lock_guard<std::mutex> lock(mutex_);
91 log::info("Draining buffered counters");
92 for (auto const& pair : counters_) {
93 Count(pair.first, pair.second);
94 }
95 counters_.clear();
96 }
97
98 } // namespace metrics
99 } // namespace bluetooth
100