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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/logger/log_component_settings.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace logger {
LogComponentSettings::LogComponentSettings() {
_minimumLoggedSeverity[LogComponent::kDefault].store(LogSeverity::Log().toInt());
for (int i = 0; i < int(LogComponent::kNumLogComponents); ++i) {
_minimumLoggedSeverity[i].store(_minimumLoggedSeverity[LogComponent::kDefault].load());
_hasMinimumLoggedSeverity[i].store(false);
}
_hasMinimumLoggedSeverity[LogComponent::kDefault].store(true);
}
LogComponentSettings::~LogComponentSettings() {}
bool LogComponentSettings::hasMinimumLogSeverity(LogComponent component) const {
dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);
return _hasMinimumLoggedSeverity[component].load();
}
LogSeverity LogComponentSettings::getMinimumLogSeverity(LogComponent component) const {
dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);
return LogSeverity::cast(_minimumLoggedSeverity[component].load());
}
void LogComponentSettings::setMinimumLoggedSeverity(LogComponent component, LogSeverity severity) {
dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);
stdx::lock_guard<stdx::mutex> lk(_mtx);
_setMinimumLoggedSeverityInLock(component, severity);
}
void LogComponentSettings::_setMinimumLoggedSeverityInLock(LogComponent component,
LogSeverity severity) {
_minimumLoggedSeverity[component].store(severity.toInt());
_hasMinimumLoggedSeverity[component].store(true);
// Every unconfigured component will inherit log severity from parent.
// Traversing the severity array once works because child components always
// come after the parent in the LogComponent::Value enumeration.
for (int i = 0; i < int(LogComponent::kNumLogComponents); ++i) {
if (!_hasMinimumLoggedSeverity[i].load()) {
LogComponent::Value v = LogComponent::Value(i);
LogComponent parentComponent = LogComponent(v).parent();
LogSeverity parentSeverity = getMinimumLogSeverity(parentComponent);
_minimumLoggedSeverity[i].store(parentSeverity.toInt());
}
}
if (kDebugBuild) {
// This loop validates the guarantee that either an element has an individual log severity
// set or that it's value is equal to its parent's (i.e. either the value is set or
// inherited).
for (int i = 0; i < int(LogComponent::kNumLogComponents); ++i) {
LogComponent::Value v = LogComponent::Value(i);
LogComponent parentComponent = LogComponent(v).parent();
invariant(_hasMinimumLoggedSeverity[i].load() ||
_minimumLoggedSeverity[i].load() ==
_minimumLoggedSeverity[parentComponent].load());
}
}
}
void LogComponentSettings::clearMinimumLoggedSeverity(LogComponent component) {
dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);
stdx::lock_guard<stdx::mutex> lk(_mtx);
// LogComponent::kDefault must always be configured.
if (component == LogComponent::kDefault) {
_setMinimumLoggedSeverityInLock(component, LogSeverity::Log());
return;
}
// Set unconfigured severity level to match LogComponent::kDefault.
_setMinimumLoggedSeverityInLock(component, getMinimumLogSeverity(component.parent()));
_hasMinimumLoggedSeverity[component].store(false);
}
bool LogComponentSettings::shouldLog(LogComponent component, LogSeverity severity) const {
dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);
return severity >= LogSeverity::cast(_minimumLoggedSeverity[component].loadRelaxed());
}
} // logger
} // mongo
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