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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "metric.h"
#include "countmetric.h"
#include "valuemetric.h"
#include "metricset.h"
#include "memoryconsumption.h"
#include <vespa/vespalib/text/stringtokenizer.h>
#include <vespa/vespalib/util/exceptions.h>
#include <vespa/vespalib/stllike/asciistream.h>
#include <vespa/vespalib/util/stringfmt.h>
#include <iterator>
#include <cassert>
#include <algorithm>
#include <ostream>
#include <regex>
namespace metrics {
bool
MetricVisitor::visitCountMetric(const AbstractCountMetric& m, bool autoGenerated)
{
return visitMetric(m, autoGenerated);
}
bool
MetricVisitor::visitValueMetric(const AbstractValueMetric& m, bool autoGenerated)
{
return visitMetric(m, autoGenerated);
}
bool
MetricVisitor::visitMetric(const Metric&, bool)
{
throw vespalib::IllegalStateException(
"visitMetric called with default implementation. You should either "
"override specific visit functions or this catchall function.",
VESPA_STRLOC);
}
namespace {
std::string namePattern = "[a-zA-Z][_a-zA-Z0-9]*";
std::regex name_pattern_regex(namePattern);
}
Tag::Tag(vespalib::stringref k)
: _key(NameRepo::tagKeyId(k)),
_value(TagValueId::empty_handle)
{ }
Tag::Tag(vespalib::stringref k, vespalib::stringref v)
: _key(NameRepo::tagKeyId(k)),
_value(NameRepo::tagValueId(v))
{ }
Tag::Tag(const Tag &) noexcept = default;
Tag & Tag::operator = (const Tag &) = default;
Tag::~Tag() {}
Metric::Metric(const String& name,
Tags dimensions,
const String& description,
MetricSet* owner)
: _name(NameRepo::metricId(name)),
_mangledName(_name),
_description(NameRepo::descriptionId(description)),
_tags(std::move(dimensions)),
_owner(nullptr)
{
verifyConstructionParameters();
assignMangledNameWithDimensions();
registerWithOwnerIfRequired(owner);
}
Metric::Metric(const Metric& other, MetricSet* owner)
: Printable(other),
_name(other._name),
_mangledName(other._mangledName),
_description(other._description),
_tags(other._tags),
_owner(nullptr)
{
assignMangledNameWithDimensions();
registerWithOwnerIfRequired(owner);
}
Metric::Metric(const Metric& rhs) = default;
Metric & Metric::operator =(const Metric& rhs) = default;
Metric::~Metric() { }
bool
Metric::tagsSpecifyAtLeastOneDimension(const Tags& tags) const
{
auto hasNonEmptyTagValue = [](const Tag& t) { return t.hasValue(); };
return std::any_of(tags.begin(), tags.end(), hasNonEmptyTagValue);
}
void
Metric::assignMangledNameWithDimensions()
{
if (!tagsSpecifyAtLeastOneDimension(_tags)) {
_mangledName = _name;
return;
}
sortTagsInDeterministicOrder();
vespalib::string mangled = createMangledNameWithDimensions();
_mangledName = NameRepo::metricId(mangled);
}
void
Metric::sortTagsInDeterministicOrder()
{
std::sort(_tags.begin(), _tags.end(), [](const Tag& a, const Tag& b) {
return a.key() < b.key();
});
}
vespalib::string
Metric::createMangledNameWithDimensions() const
{
vespalib::asciistream s;
s << getName() << '{';
const size_t sz = _tags.size();
for (size_t i = 0; i < sz; ++i) {
const Tag& dimension(_tags[i]);
if (dimension.value().empty()) {
continue;
}
if (i != 0) {
s << ',';
}
s << dimension.key() << ':' << dimension.value();
}
s << '}';
return s.str();
}
void
Metric::verifyConstructionParameters()
{
if (getName().size() == 0) {
throw vespalib::IllegalArgumentException(
"Metric cannot have empty name", VESPA_STRLOC);
}
const auto &name = getName();
if (!std::regex_search(name.c_str(), name.c_str() + name.size(), name_pattern_regex)) {
throw vespalib::IllegalArgumentException(
"Illegal metric name '" + getName() + "'. Names must match pattern "
+ namePattern, VESPA_STRLOC);
}
}
void
Metric::registerWithOwnerIfRequired(MetricSet* owner)
{
if (owner) {
owner->registerMetric(*this);
}
}
const MetricSet*
Metric::getRoot() const
{
return (_owner == 0 ? (isMetricSet() ? static_cast<const MetricSet*>(this)
: 0)
: _owner->getRoot());
}
vespalib::string
Metric::getPath() const
{
if (_owner == 0 || _owner->_owner == 0) {
return getName();
} else {
vespalib::string path(_owner->getPath());
path.append('.');
path.append(getName());
return path;
}
}
std::vector<Metric::String>
Metric::getPathVector() const
{
std::vector<String> result;
result.push_back(getName());
const MetricSet* owner(_owner);
while (owner != 0) {
result.push_back(owner->getName());
owner = owner->_owner;
}
std::reverse(result.begin(), result.end());
return result;
}
bool
Metric::hasTag(const String& tag) const
{
return std::find_if(_tags.begin(), _tags.end(), [&](const Tag& t) {
return t.key() == tag;
}) != _tags.end();
}
void
Metric::addMemoryUsage(MemoryConsumption& mc) const
{
++mc._metricCount;
mc._metricName += mc.getStringMemoryUsage(getName(), mc._metricNameUnique);
mc._metricDescription += mc.getStringMemoryUsage(getDescription(), mc._metricDescriptionUnique);
mc._metricTagCount += _tags.size();
// XXX figure out what we actually want to report from tags here...
// XXX we don't care about unique strings since they don't matter anymore.
//mc._metricTags += mc.getStringMemoryUsage(_tags, mc._metricTagsUnique);
mc._metricMeta += sizeof(Metric);
}
void
Metric::printDebug(std::ostream& out, const std::string& indent) const
{
(void) indent;
out << "name=" << getName() << ", instance=" << ((const void*) this)
<< ", owner=" << ((const void*) _owner);
}
Metric*
Metric::assignValues(const Metric& m) {
std::vector<Metric::UP> ownerList;
const_cast<Metric&>(m).addToSnapshot(*this, ownerList);
// As this should only be called among active metrics, all metrics
// should exist and owner list should thus always end up empty.
assert(ownerList.empty());
return this;
}
bool
Metric::is_sum_metric() const
{
return false;
}
} // metrics
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