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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "textwriter.h"
#include "countmetric.h"
#include "metricset.h"
#include "metricsnapshot.h"
#include "valuemetric.h"
#include <sstream>
using vespalib::to_string;
namespace metrics {
TextWriter::TextWriter(std::ostream& out, vespalib::duration period,
const std::string& regex, bool verbose)
: _period(period), _out(out), _regex(), _verbose(verbose)
{
try {
_regex = std::regex(regex);
} catch (std::regex_error &) {
}
}
TextWriter::~TextWriter() = default;
bool
TextWriter::visitSnapshot(const MetricSnapshot& snapshot)
{
_out << "snapshot \"" << snapshot.getName() << "\" from "
<< to_string(snapshot.getFromTime()) << " to " << to_string(snapshot.getToTime())
<< " period " << vespalib::count_s(snapshot.getPeriod());
return true;
}
void
TextWriter::doneVisitingSnapshot(const MetricSnapshot&)
{
}
bool
TextWriter::visitMetricSet(const MetricSet& set, bool)
{
_path.push_back(set.getMangledName());
return true;
}
void
TextWriter::doneVisitingMetricSet(const MetricSet&) {
_path.pop_back();
}
bool
TextWriter::writeCommon(const Metric& metric)
{
std::ostringstream path;
for (uint32_t i=0; i<_path.size(); ++i) {
path << _path[i] << ".";
}
std::string mypath(path.str());
path << metric.getMangledName();
if (_regex && std::regex_search(path.str(), *_regex)) {
if (metric.used() || _verbose) {
_out << "\n" << mypath;
return true;
}
}
return false;
}
bool
TextWriter::visitCountMetric(const AbstractCountMetric& m, bool)
{
if (writeCommon(m)) {
if (_verbose || m.used()) {
MetricValueClass::UP values(m.getValues());
_out << m.getMangledName()
<< (m.sumOnAdd() ? " count=" : " value=");
values->output("count", _out);
}
}
return true;
}
bool
TextWriter::visitValueMetric(const AbstractValueMetric& m, bool)
{
if (writeCommon(m)) {
m.print(_out, _verbose, " ", vespalib::count_s(_period));
}
return true;
}
} // metrics
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