Implement validator for the check_interval attribute

fixes #7591

lib/icinga/checkable.cpp

@@ -18,14 +18,17 @@
  ******************************************************************************/
 
 #include "icinga/checkable.hpp"
+#include "config/configcompilercontext.hpp"
 #include "base/objectlock.hpp"
 #include "base/utility.hpp"
+#include "base/scriptfunction.hpp"
 #include <boost/foreach.hpp>
 #include <boost/bind/apply.hpp>
 
 using namespace icinga;
 
 REGISTER_TYPE(Checkable);
+REGISTER_SCRIPTFUNCTION(ValidateCheckableCheckInterval, &Checkable::ValidateCheckInterval);
 
 boost::signals2::signal<void (const Checkable::Ptr&, bool, const MessageOrigin&)> Checkable::OnEnablePerfdataChanged;
 boost::signals2::signal<void (const Checkable::Ptr&, const String&, const String&, AcknowledgementType, double, const MessageOrigin&)> Checkable::OnAcknowledgementSet;
@@ -263,3 +266,11 @@ Endpoint::Ptr Checkable::GetCommandEndpoint(void) const
 {
 	return Endpoint::GetByName(GetCommandEndpointRaw());
 }
+
+void Checkable::ValidateCheckInterval(const String& location, const Checkable::Ptr& object)
+{
+	if (object->GetCheckInterval() <= 0) {
+		ConfigCompilerContext::GetInstance()->AddMessage(true, "Validation failed for " +
+		    location + ": check_interval must be greater than 0.");
+	}
+}

lib/icinga/checkable.hpp

@@ -276,6 +276,8 @@ public:
 	void RemoveReverseDependency(const intrusive_ptr<Dependency>& dep);
 	std::set<intrusive_ptr<Dependency> > GetReverseDependencies(void) const;
 
+	static void ValidateCheckInterval(const String& location, const Checkable::Ptr& object);
+
 protected:
 	virtual void Start(void);
 

lib/icinga/icinga-type.conf

@@ -26,6 +26,8 @@
 }
 
 %type Checkable {
+	%validator "ValidateCheckableCheckInterval",
+
 	%attribute %string "display_name",
 
 	%require "check_command",