icinga2/components/perfdata/perfdatawriter.cpp

/******************************************************************************
 * Icinga 2                                                                   *
 * Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org)    *
 *                                                                            *
 * This program is free software; you can redistribute it and/or              *
 * modify it under the terms of the GNU General Public License                *
 * as published by the Free Software Foundation; either version 2             *
 * of the License, or (at your option) any later version.                     *
 *                                                                            *
 * 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 General Public License for more details.                               *
 *                                                                            *
 * You should have received a copy of the GNU General Public License          *
 * along with this program; if not, write to the Free Software Foundation     *
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
 ******************************************************************************/

#include "perfdata/perfdatawriter.h"
#include "icinga/service.h"
#include "icinga/macroprocessor.h"
#include "icinga/icingaapplication.h"
#include "base/dynamictype.h"
#include "base/objectlock.h"
#include "base/logger_fwd.h"
#include "base/convert.h"
#include "base/utility.h"
#include "base/context.h"
#include "base/application.h"
#include "base/statsfunction.h"

using namespace icinga;

REGISTER_TYPE(PerfdataWriter);

REGISTER_STATSFUNCTION(PerfdataWriterStats, &PerfdataWriter::StatsFunc);

Value PerfdataWriter::StatsFunc(Dictionary::Ptr& status, Dictionary::Ptr& perfdata)
{
	Dictionary::Ptr nodes = make_shared<Dictionary>();

	BOOST_FOREACH(const PerfdataWriter::Ptr& perfdatawriter, DynamicType::GetObjects<PerfdataWriter>()) {
		nodes->Set(perfdatawriter->GetName(), 1); //add more stats
	}

	status->Set("perfdatawriter", nodes);

	return 0;
}

void PerfdataWriter::Start(void)
{
	DynamicObject::Start();

	Service::OnNewCheckResult.connect(boost::bind(&PerfdataWriter::CheckResultHandler, this, _1, _2));

	m_RotationTimer = make_shared<Timer>();
	m_RotationTimer->OnTimerExpired.connect(boost::bind(&PerfdataWriter::RotationTimerHandler, this));
	m_RotationTimer->SetInterval(GetRotationInterval());
	m_RotationTimer->Start();

	RotateFile(m_ServiceOutputFile, GetServiceTempPath(), GetServicePerfdataPath());
	RotateFile(m_HostOutputFile, GetHostTempPath(), GetHostPerfdataPath());
}

void PerfdataWriter::CheckResultHandler(const Service::Ptr& service, const CheckResult::Ptr& cr)
{
	CONTEXT("Writing performance data for service '" + service->GetShortName() + "' on host '" + service->GetHost()->GetName() + "'");

	if (!IcingaApplication::GetInstance()->GetEnablePerfdata() || !service->GetEnablePerfdata())
		return;

	Host::Ptr host = service->GetHost();

	std::vector<MacroResolver::Ptr> resolvers;
	resolvers.push_back(service);
	resolvers.push_back(host);
	resolvers.push_back(IcingaApplication::GetInstance());

	String line = MacroProcessor::ResolveMacros(GetServiceFormatTemplate(), resolvers, cr);

	{
		ObjectLock olock(this);
		if (!m_ServiceOutputFile.good())
			return;

		m_ServiceOutputFile << line << "\n";
	}

	if (service == host->GetCheckService()) {
		resolvers.clear();
		resolvers.push_back(host);
		resolvers.push_back(IcingaApplication::GetInstance());
		line = MacroProcessor::ResolveMacros(GetHostFormatTemplate(), resolvers, cr);

		{
			ObjectLock olock(this);
			if (!m_HostOutputFile.good())
				return;

			m_HostOutputFile << line << "\n";
		}
	}
}

void PerfdataWriter::RotateFile(std::ofstream& output, const String& temp_path, const String& perfdata_path)
{
	ObjectLock olock(this);

	if (output.good()) {
		output.close();

		String finalFile = perfdata_path + "." + Convert::ToString((long)Utility::GetTime());
		(void) rename(temp_path.CStr(), finalFile.CStr());
	}

	output.open(temp_path.CStr());

	if (!output.good())
		Log(LogWarning, "icinga", "Could not open perfdata file '" + temp_path + "' for writing. Perfdata will be lost.");
}

void PerfdataWriter::RotationTimerHandler(void)
{
	RotateFile(m_ServiceOutputFile, GetServiceTempPath(), GetServicePerfdataPath());
	RotateFile(m_HostOutputFile, GetHostTempPath(), GetHostPerfdataPath());
}