icinga2/lib/icinga/service-apply.cpp

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/******************************************************************************
* Icinga 2 *
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* 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. *
******************************************************************************/
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#include "icinga/service.hpp"
#include "config/configitembuilder.hpp"
#include "config/applyrule.hpp"
#include "config/configcompilercontext.hpp"
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#include "base/initialize.hpp"
#include "base/dynamictype.hpp"
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#include "base/logger.hpp"
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#include "base/context.hpp"
#include "base/workqueue.hpp"
#include "base/configerror.hpp"
#include <boost/foreach.hpp>
using namespace icinga;
INITIALIZE_ONCE(&Service::RegisterApplyRuleHandler);
void Service::RegisterApplyRuleHandler(void)
{
std::vector<String> targets;
targets.push_back("Host");
ApplyRule::RegisterType("Service", targets, &Service::EvaluateApplyRules);
}
bool Service::EvaluateApplyRuleOne(const Host::Ptr& host, const ApplyRule& rule)
{
DebugInfo di = rule.GetDebugInfo();
std::ostringstream msgbuf;
msgbuf << "Evaluating 'apply' rule (" << di << ")";
CONTEXT(msgbuf.str());
Dictionary::Ptr locals = make_shared<Dictionary>();
locals->Set("__parent", rule.GetScope());
locals->Set("host", host);
if (!rule.EvaluateFilter(locals))
return false;
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Log(LogDebug, "Service")
<< "Applying service '" << rule.GetName() << "' to host '" << host->GetName() << "' for rule " << di;
ConfigItemBuilder::Ptr builder = make_shared<ConfigItemBuilder>(di);
builder->SetType("Service");
builder->SetName(rule.GetName());
builder->SetScope(locals);
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builder->AddExpression(make_shared<Expression>(&Expression::OpSet,
make_shared<Expression>(&Expression::OpLiteral, "host_name", di),
make_shared<Expression>(&Expression::OpLiteral, host->GetName(), di),
di));
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builder->AddExpression(make_shared<Expression>(&Expression::OpSet,
make_shared<Expression>(&Expression::OpLiteral, "name", di),
make_shared<Expression>(&Expression::OpLiteral, rule.GetName(), di),
di));
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String zone = host->GetZone();
if (!zone.IsEmpty()) {
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builder->AddExpression(make_shared<Expression>(&Expression::OpSet,
make_shared<Expression>(&Expression::OpLiteral, "zone", di),
make_shared<Expression>(&Expression::OpLiteral, zone, di),
di));
}
builder->AddExpression(rule.GetExpression());
ConfigItem::Ptr serviceItem = builder->Compile();
serviceItem->Register();
DynamicObject::Ptr dobj = serviceItem->Commit();
dobj->OnConfigLoaded();
return true;
}
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void Service::EvaluateApplyRule(const ApplyRule& rule)
{
int apply_count = 0;
BOOST_FOREACH(const Host::Ptr& host, DynamicType::GetObjectsByType<Host>()) {
CONTEXT("Evaluating 'apply' rules for host '" + host->GetName() + "'");
try {
if (EvaluateApplyRuleOne(host, rule))
apply_count++;
} catch (const ConfigError& ex) {
const DebugInfo *di = boost::get_error_info<errinfo_debuginfo>(ex);
ConfigCompilerContext::GetInstance()->AddMessage(true, ex.what(), di ? *di : DebugInfo());
}
}
if (apply_count == 0)
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Log(LogWarning, "Service")
<< "Apply rule '" << rule.GetName() << "' for host does not match anywhere!";
}
void Service::EvaluateApplyRules(const std::vector<ApplyRule>& rules)
{
ParallelWorkQueue upq;
BOOST_FOREACH(const ApplyRule& rule, rules) {
upq.Enqueue(boost::bind(&Service::EvaluateApplyRule, boost::cref(rule)));
}
upq.Join();
}