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/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
#include "icinga/dependency.hpp"
#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("Dependency", { "Host", "Service" });
});
bool Dependency::EvaluateApplyRuleInstance(const Checkable::Ptr& checkable, const String& name, ScriptFrame& frame, const ApplyRule& rule, bool skipFilter)
{
if (!skipFilter && !rule.EvaluateFilter(frame))
return false;
DebugInfo di = rule.GetDebugInfo();
#ifdef _DEBUG
Log(LogDebug, "Dependency")
<< "Applying dependency '" << name << "' to object '" << checkable->GetName() << "' for rule " << di;
#endif /* _DEBUG */
ConfigItemBuilder builder{di};
builder.SetType(Dependency::TypeInstance);
builder.SetName(name);
builder.SetScope(frame.Locals->ShallowClone());
builder.SetIgnoreOnError(rule.GetIgnoreOnError());
builder.AddExpression(new ImportDefaultTemplatesExpression());
Host::Ptr host;
Service::Ptr service;
tie(host, service) = GetHostService(checkable);
builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "parent_host_name"), OpSetLiteral, MakeLiteral(host->GetName()), di));
builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "child_host_name"), OpSetLiteral, MakeLiteral(host->GetName()), di));
if (service)
builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "child_service_name"), OpSetLiteral, MakeLiteral(service->GetShortName()), di));
String zone = checkable->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 dependencyItem = builder.Compile();
dependencyItem->Register();
return true;
}
bool Dependency::EvaluateApplyRule(const Checkable::Ptr& checkable, const ApplyRule& rule, bool skipFilter)
{
DebugInfo di = rule.GetDebugInfo();
std::ostringstream msgbuf;
msgbuf << "Evaluating 'apply' rule (" << di << ")";
CONTEXT(msgbuf.str());
Host::Ptr host;
Service::Ptr service;
tie(host, service) = GetHostService(checkable);
ScriptFrame frame(true);
if (rule.GetScope())
rule.GetScope()->CopyTo(frame.Locals);
frame.Locals->Set("host", host);
if (service)
frame.Locals->Set("service", service);
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(checkable, 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(checkable, rule.GetName() + key, frame, rule, skipFilter))
match = true;
}
}
return match;
}
void Dependency::EvaluateApplyRules(const Host::Ptr& host)
{
CONTEXT("Evaluating 'apply' rules for host '" + host->GetName() + "'");
for (auto& rule : ApplyRule::GetRules(Dependency::TypeInstance, Host::TypeInstance)) {
if (EvaluateApplyRule(host, *rule))
rule->AddMatch();
}
for (auto& rule : ApplyRule::GetTargetedHostRules(Dependency::TypeInstance, host->GetName())) {
if (EvaluateApplyRule(host, *rule, true))
rule->AddMatch();
}
}
void Dependency::EvaluateApplyRules(const Service::Ptr& service)
{
CONTEXT("Evaluating 'apply' rules for service '" + service->GetName() + "'");
for (auto& rule : ApplyRule::GetRules(Dependency::TypeInstance, Service::TypeInstance)) {
if (EvaluateApplyRule(service, *rule))
rule->AddMatch();
}
for (auto& rule : ApplyRule::GetTargetedServiceRules(Dependency::TypeInstance, service->GetHost()->GetName(), service->GetShortName())) {
if (EvaluateApplyRule(service, *rule, true))
rule->AddMatch();
}
}
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