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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "simple_metrics_manager.h"
#include "simple_tick.h"
#include <cassert>
#include <vespa/log/log.h>
LOG_SETUP(".vespalib.metrics.simple_metrics_manager");
namespace vespalib {
namespace metrics {
using Guard = std::lock_guard<std::mutex>;
SimpleMetricsManager::SimpleMetricsManager(const SimpleManagerConfig &config,
Tick::UP tick_supplier)
: _currentSamples(),
_tickSupplier(std::move(tick_supplier)),
_startTime(_tickSupplier->first()),
_curTime(_startTime),
_collectCnt(0),
_buckets(),
_firstBucket(0),
_maxBuckets(config.sliding_window_seconds),
_totalsBucket(0, _startTime, _startTime),
_thread(&SimpleMetricsManager::tickerLoop, this)
{
if (_maxBuckets < 1) _maxBuckets = 1;
Point empty = pointFrom(PointMap());
assert(empty.id() == 0);
}
SimpleMetricsManager::~SimpleMetricsManager()
{
stopThread();
}
std::shared_ptr<MetricsManager>
SimpleMetricsManager::create(const SimpleManagerConfig &config)
{
return std::shared_ptr<MetricsManager>(
new SimpleMetricsManager(config, std::make_unique<SimpleTick>()));
}
std::shared_ptr<MetricsManager>
SimpleMetricsManager::createForTest(const SimpleManagerConfig &config,
Tick::UP tick_supplier)
{
return std::shared_ptr<MetricsManager>(
new SimpleMetricsManager(config, std::move(tick_supplier)));
}
Counter
SimpleMetricsManager::counter(const vespalib::string &name, const vespalib::string &)
{
MetricId mi = MetricId::from_name(name);
_metricTypes.check(mi.id(), name, MetricTypes::MetricType::COUNTER);
LOG(debug, "counter with metric name %s -> %zu", name.c_str(), mi.id());
return Counter(shared_from_this(), mi);
}
Gauge
SimpleMetricsManager::gauge(const vespalib::string &name, const vespalib::string &)
{
MetricId mi = MetricId::from_name(name);
_metricTypes.check(mi.id(), name, MetricTypes::MetricType::GAUGE);
LOG(debug, "gauge with metric name %s -> %zu", name.c_str(), mi.id());
return Gauge(shared_from_this(), mi);
}
Bucket
SimpleMetricsManager::mergeBuckets()
{
Guard bucketsGuard(_bucketsLock);
if (_buckets.size() > 0) {
TimeStamp startTime = _buckets[_firstBucket].startTime;
Bucket merger(0, startTime, startTime);
for (size_t i = 0; i < _buckets.size(); i++) {
size_t off = (_firstBucket + i) % _buckets.size();
merger.merge(_buckets[off]);
}
merger.padMetrics(_totalsBucket);
return merger;
}
// no data
return Bucket(0, _startTime, _curTime);
}
Bucket
SimpleMetricsManager::totalsBucket()
{
Guard bucketsGuard(_bucketsLock);
return _totalsBucket;
}
Snapshot
SimpleMetricsManager::snapshotFrom(const Bucket &bucket)
{
std::vector<PointSnapshot> points;
double s = bucket.startTime.count();
double e = bucket.endTime.count();
size_t max_point_id = 0;
for (const CounterAggregator& entry : bucket.counters) {
Point p = entry.idx.second;
max_point_id = std::max(max_point_id, p.id());
}
for (const GaugeAggregator& entry : bucket.gauges) {
Point p = entry.idx.second;
max_point_id = std::max(max_point_id, p.id());
}
Snapshot snap(s, e);
{
for (size_t point_id = 0; point_id <= max_point_id; ++point_id) {
const PointMap &map = Point(point_id).as_map();
PointSnapshot point;
for (const PointMap::value_type &kv : map) {
point.dimensions.emplace_back(kv.first.as_name(), kv.second.as_value());
}
snap.add(point);
}
}
for (const CounterAggregator& entry : bucket.counters) {
MetricId mi = entry.idx.first;
Point p = entry.idx.second;
size_t pi = p.id();
const vespalib::string &name = mi.as_name();
CounterSnapshot val(name, snap.points()[pi], entry);
snap.add(val);
}
for (const GaugeAggregator& entry : bucket.gauges) {
MetricId mi = entry.idx.first;
Point p = entry.idx.second;
size_t pi = p.id();
const vespalib::string &name = mi.as_name();
GaugeSnapshot val(name, snap.points()[pi], entry);
snap.add(val);
}
return snap;
}
Snapshot
SimpleMetricsManager::snapshot()
{
Bucket merged = mergeBuckets();
return snapshotFrom(merged);
}
Snapshot
SimpleMetricsManager::totalSnapshot()
{
Bucket totals = totalsBucket();
return snapshotFrom(totals);
}
void
SimpleMetricsManager::collectCurrentSamples(TimeStamp prev,
TimeStamp curr)
{
CurrentSamples samples;
_currentSamples.extract(samples);
Bucket newBucket(++_collectCnt, prev, curr);
newBucket.merge(samples);
Guard guard(_bucketsLock);
_totalsBucket.merge(newBucket);
if (_buckets.size() < _maxBuckets) {
_buckets.push_back(std::move(newBucket));
} else {
_buckets[_firstBucket] = std::move(newBucket);
_firstBucket = (_firstBucket + 1) % _buckets.size();
}
}
Dimension
SimpleMetricsManager::dimension(const vespalib::string &name)
{
Dimension dim = Dimension::from_name(name);
LOG(debug, "dimension name %s -> %zu", name.c_str(), dim.id());
return dim;
}
Label
SimpleMetricsManager::label(const vespalib::string &value)
{
Label l = Label::from_value(value);
LOG(debug, "label value %s -> %zu", value.c_str(), l.id());
return l;
}
PointBuilder
SimpleMetricsManager::pointBuilder(Point from)
{
const PointMap &map = from.as_map();
return PointBuilder(shared_from_this(), map);
}
Point
SimpleMetricsManager::pointFrom(PointMap map)
{
return Point::from_map(std::move(map));
}
void
SimpleMetricsManager::tickerLoop()
{
while (_tickSupplier->alive()) {
TimeStamp now = _tickSupplier->next(_curTime);
if (_tickSupplier->alive()) {
tick(now);
}
}
}
void
SimpleMetricsManager::stopThread()
{
_tickSupplier->kill();
_thread.join();
}
void
SimpleMetricsManager::tick(TimeStamp now)
{
TimeStamp prev = _curTime;
collectCurrentSamples(prev, now);
_curTime = now;
}
} // namespace vespalib::metrics
} // namespace vespalib
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