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/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
#include "icinga/service.hpp"
#include "config/configitembuilder.hpp"
#include "config/applyrule.hpp"
#include "base/initialize.hpp"
#include "base/configtype.hpp"
#include "base/logger.hpp"
#include "base/context.hpp"
#include "base/workqueue.hpp"
#include "base/exception.hpp"
using namespace icinga;
INITIALIZE_ONCE([]() {
ApplyRule::RegisterType("Service", { "Host" });
});
bool Service::EvaluateApplyRuleInstance(const Host::Ptr& host, const String& name, ScriptFrame& frame, const ApplyRule& rule, bool skipFilter)
{
if (!skipFilter && !rule.EvaluateFilter(frame))
return false;
auto& di (rule.GetDebugInfo());
#ifdef _DEBUG
Log(LogDebug, "Service")
<< "Applying service '" << name << "' to host '" << host->GetName() << "' for rule " << di;
#endif /* _DEBUG */
ConfigItemBuilder builder{di};
builder.SetType(Service::TypeInstance);
builder.SetName(name);
builder.SetScope(frame.Locals->ShallowClone());
builder.SetIgnoreOnError(rule.GetIgnoreOnError());
builder.AddExpression(new ImportDefaultTemplatesExpression());
builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "host_name"), OpSetLiteral, MakeLiteral(host->GetName()), di));
builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "name"), OpSetLiteral, MakeLiteral(name), di));
String zone = host->GetZoneName();
if (!zone.IsEmpty())
builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "zone"), OpSetLiteral, MakeLiteral(zone), di));
builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "package"), OpSetLiteral, MakeLiteral(rule.GetPackage()), di));
builder.AddExpression(new OwnedExpression(rule.GetExpression()));
ConfigItem::Ptr serviceItem = builder.Compile();
serviceItem->Register();
return true;
}
bool Service::EvaluateApplyRule(const Host::Ptr& host, const ApplyRule& rule, bool skipFilter)
{
auto& di (rule.GetDebugInfo());
CONTEXT("Evaluating 'apply' rule (" << di << ")");
ScriptFrame frame(true);
if (rule.GetScope())
rule.GetScope()->CopyTo(frame.Locals);
frame.Locals->Set("host", host);
Value vinstances;
if (rule.GetFTerm()) {
try {
vinstances = rule.GetFTerm()->Evaluate(frame);
} catch (const std::exception&) {
/* Silently ignore errors here and assume there are no instances. */
return false;
}
} else {
vinstances = new Array({ "" });
}
bool match = false;
if (vinstances.IsObjectType<Array>()) {
if (!rule.GetFVVar().IsEmpty())
BOOST_THROW_EXCEPTION(ScriptError("Dictionary iterator requires value to be a dictionary.", di));
Array::Ptr arr = vinstances;
ObjectLock olock(arr);
for (const Value& instance : arr) {
String name = rule.GetName();
if (!rule.GetFKVar().IsEmpty()) {
frame.Locals->Set(rule.GetFKVar(), instance);
name += instance;
}
if (EvaluateApplyRuleInstance(host, name, frame, rule, skipFilter))
match = true;
}
} else if (vinstances.IsObjectType<Dictionary>()) {
if (rule.GetFVVar().IsEmpty())
BOOST_THROW_EXCEPTION(ScriptError("Array iterator requires value to be an array.", di));
Dictionary::Ptr dict = vinstances;
for (const String& key : dict->GetKeys()) {
frame.Locals->Set(rule.GetFKVar(), key);
frame.Locals->Set(rule.GetFVVar(), dict->Get(key));
if (EvaluateApplyRuleInstance(host, rule.GetName() + key, frame, rule, skipFilter))
match = true;
}
}
return match;
}
void Service::EvaluateApplyRules(const Host::Ptr& host)
{
CONTEXT("Evaluating 'apply' rules for host '" << host->GetName() << "'");
for (auto& rule : ApplyRule::GetRules(Service::TypeInstance, Host::TypeInstance)) {
if (EvaluateApplyRule(host, *rule))
rule->AddMatch();
}
for (auto& rule : ApplyRule::GetTargetedHostRules(Service::TypeInstance, host->GetName())) {
if (EvaluateApplyRule(host, *rule, true))
rule->AddMatch();
}
}
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