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path: root/src/mongo/logger/log_component_settings.cpp
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/*    Copyright 2014 MongoDB Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    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
 *    GNU Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    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 GNU Affero General 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] = char(LogSeverity::Log().toInt());

        for (int i = 0; i < int(LogComponent::kNumLogComponents); ++i) {
            _minimumLoggedSeverity[i] = _minimumLoggedSeverity[LogComponent::kDefault];
            _hasMinimumLoggedSeverity[i] = false;
        }

        _hasMinimumLoggedSeverity[LogComponent::kDefault] = true;
    }

    LogComponentSettings::~LogComponentSettings() { }

    bool LogComponentSettings::hasMinimumLogSeverity(LogComponent component) const {
        dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);
        return _hasMinimumLoggedSeverity[component];
    }

    LogSeverity LogComponentSettings::getMinimumLogSeverity(LogComponent component) const {
        dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);
        return LogSeverity::cast(_minimumLoggedSeverity[component]);
    }

    void LogComponentSettings::setMinimumLoggedSeverity(LogComponent component,
                                                        LogSeverity severity) {
        dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);
        _minimumLoggedSeverity[component] = char(severity.toInt());
        _hasMinimumLoggedSeverity[component] = 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]) {
                LogComponent::Value v = LogComponent::Value(i);
                LogComponent parentComponent = LogComponent(v).parent();
                LogSeverity parentSeverity = getMinimumLogSeverity(parentComponent);
                _minimumLoggedSeverity[i] = char(parentSeverity.toInt());
            }
        }
    }

    void LogComponentSettings::clearMinimumLoggedSeverity(LogComponent component) {
        dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);

        // LogComponent::kDefault must always be configured.
        if (component == LogComponent::kDefault) {
            setMinimumLoggedSeverity(component, LogSeverity::Log());
            return;
        }

        // Set unconfigured severity level to match LogComponent::kDefault.
        setMinimumLoggedSeverity(component, getMinimumLogSeverity(component.parent()));
        _hasMinimumLoggedSeverity[component] = false;
    }

    bool LogComponentSettings::shouldLog(LogComponent component, LogSeverity severity) const {
        dassert(int(component) >= 0 && int(component) < LogComponent::kNumLogComponents);

        // Should match parent component if minimum severity level is not configured for
        // component.
        dassert(_hasMinimumLoggedSeverity[component] ||
                  _minimumLoggedSeverity[component] ==
                      _minimumLoggedSeverity[component.parent()]);

        return severity >= LogSeverity::cast(_minimumLoggedSeverity[component]);
    }

}  // logger
}  // mongo