granicus.if.org Git - icinga2/blob - lib/icinga/dependency-apply.cpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org)    *
   4  *                                                                            *
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   8  * of the License, or (at your option) any later version.                     *
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  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19
  20 #include "icinga/dependency.hpp"
  21 #include "icinga/service.hpp"
  22 #include "config/configitembuilder.hpp"
  23 #include "config/applyrule.hpp"
  24 #include "base/initialize.hpp"
  25 #include "base/dynamictype.hpp"
  26 #include "base/logger.hpp"
  27 #include "base/context.hpp"
  28 #include "base/workqueue.hpp"
  29 #include "base/exception.hpp"
  30 #include <boost/foreach.hpp>
  31
  32 using namespace icinga;
  33
  34 INITIALIZE_ONCE(&Dependency::RegisterApplyRuleHandler);
  35
  36 void Dependency::RegisterApplyRuleHandler(void)
  37 {
  38         std::vector<String> targets;
  39         targets.push_back("Host");
  40         targets.push_back("Service");
  41         ApplyRule::RegisterType("Dependency", targets);
  42 }
  43
  44 void Dependency::EvaluateApplyRuleInstance(const Checkable::Ptr& checkable, const String& name, ScriptFrame& frame, const ApplyRule& rule)
  45 {
  46         DebugInfo di = rule.GetDebugInfo();
  47
  48         Log(LogDebug, "Dependency")
  49                 << "Applying dependency '" << name << "' to object '" << checkable->GetName() << "' for rule " << di;
  50
  51         ConfigItemBuilder::Ptr builder = new ConfigItemBuilder(di);
  52         builder->SetType("Dependency");
  53         builder->SetName(name);
  54         builder->SetScope(frame.Locals);
  55
  56         Host::Ptr host;
  57         Service::Ptr service;
  58         tie(host, service) = GetHostService(checkable);
  59
  60         builder->AddExpression(new SetExpression(MakeIndexer(ScopeCurrent, "parent_host_name"), OpSetLiteral, MakeLiteral(host->GetName()), di));
  61         builder->AddExpression(new SetExpression(MakeIndexer(ScopeCurrent, "child_host_name"), OpSetLiteral, MakeLiteral(host->GetName()), di));
  62
  63         if (service)
  64                 builder->AddExpression(new SetExpression(MakeIndexer(ScopeCurrent, "child_service_name"), OpSetLiteral, MakeLiteral(service->GetShortName()), di));
  65
  66         String zone = checkable->GetZone();
  67
  68         if (!zone.IsEmpty())
  69                 builder->AddExpression(new SetExpression(MakeIndexer(ScopeCurrent, "zone"), OpSetLiteral, MakeLiteral(zone), di));
  70
  71         builder->AddExpression(new OwnedExpression(rule.GetExpression()));
  72
  73         ConfigItem::Ptr dependencyItem = builder->Compile();
  74         dependencyItem->Commit();
  75 }
  76
  77 bool Dependency::EvaluateApplyRule(const Checkable::Ptr& checkable, const ApplyRule& rule)
  78 {
  79         DebugInfo di = rule.GetDebugInfo();
  80
  81         std::ostringstream msgbuf;
  82         msgbuf << "Evaluating 'apply' rule (" << di << ")";
  83         CONTEXT(msgbuf.str());
  84
  85         Host::Ptr host;
  86         Service::Ptr service;
  87         tie(host, service) = GetHostService(checkable);
  88
  89         ScriptFrame frame;
  90         if (rule.GetScope())
  91                 rule.GetScope()->CopyTo(frame.Locals);
  92         frame.Locals->Set("host", host);
  93         if (service)
  94                 frame.Locals->Set("service", service);
  95
  96         if (!rule.EvaluateFilter(frame))
  97                 return false;
  98
  99         Value vinstances;
 100
 101         if (rule.GetFTerm()) {
 102                 vinstances = rule.GetFTerm()->Evaluate(frame);
 103         } else {
 104                 Array::Ptr instances = new Array();
 105                 instances->Add("");
 106                 vinstances = instances;
 107         }
 108
 109         if (vinstances.IsObjectType<Array>()) {
 110                 if (!rule.GetFVVar().IsEmpty())
 111                         BOOST_THROW_EXCEPTION(ScriptError("Array iterator requires value to be an array.", di));
 112
 113                 Array::Ptr arr = vinstances;
 114
 115                 ObjectLock olock(arr);
 116                 BOOST_FOREACH(const String& instance, arr) {
 117                         String name = rule.GetName();
 118
 119                         if (!rule.GetFKVar().IsEmpty()) {
 120                                 frame.Locals->Set(rule.GetFKVar(), instance);
 121                                 name += instance;
 122                         }
 123
 124                         EvaluateApplyRuleInstance(checkable, name, frame, rule);
 125                 }
 126         } else if (vinstances.IsObjectType<Dictionary>()) {
 127                 if (rule.GetFVVar().IsEmpty())
 128                         BOOST_THROW_EXCEPTION(ScriptError("Dictionary iterator requires value to be a dictionary.", di));
 129
 130                 Dictionary::Ptr dict = vinstances;
 131
 132                 ObjectLock olock(dict);
 133                 BOOST_FOREACH(const Dictionary::Pair& kv, dict) {
 134                         frame.Locals->Set(rule.GetFKVar(), kv.first);
 135                         frame.Locals->Set(rule.GetFVVar(), kv.second);
 136
 137                         EvaluateApplyRuleInstance(checkable, rule.GetName() + kv.first, frame, rule);
 138                 }
 139         }
 140
 141         return true;
 142 }
 143
 144 void Dependency::EvaluateApplyRules(const Host::Ptr& host)
 145 {
 146         CONTEXT("Evaluating 'apply' rules for host '" + host->GetName() + "'");
 147
 148         BOOST_FOREACH(ApplyRule& rule, ApplyRule::GetRules("Dependency")) {
 149                 if (rule.GetTargetType() != "Host")
 150                         continue;
 151
 152                 if (EvaluateApplyRule(host, rule))
 153                         rule.AddMatch();
 154         }
 155 }
 156
 157 void Dependency::EvaluateApplyRules(const Service::Ptr& service)
 158 {
 159         CONTEXT("Evaluating 'apply' rules for service '" + service->GetName() + "'");
 160
 161         BOOST_FOREACH(ApplyRule& rule, ApplyRule::GetRules("Dependency")) {
 162                 if (rule.GetTargetType() != "Service")
 163                         continue;
 164
 165                 if (EvaluateApplyRule(service, rule))
 166                         rule.AddMatch();
 167         }
 168 }