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.                     *
   9  *                                                                            *
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  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
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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 "config/configcompilercontext.hpp"
  25 #include "base/initialize.hpp"
  26 #include "base/dynamictype.hpp"
  27 #include "base/logger.hpp"
  28 #include "base/context.hpp"
  29 #include "base/workqueue.hpp"
  30 #include "base/configerror.hpp"
  31 #include <boost/foreach.hpp>
  32
  33 using namespace icinga;
  34
  35 INITIALIZE_ONCE(&Dependency::RegisterApplyRuleHandler);
  36
  37 void Dependency::RegisterApplyRuleHandler(void)
  38 {
  39         std::vector<String> targets;
  40         targets.push_back("Host");
  41         targets.push_back("Service");
  42         ApplyRule::RegisterType("Dependency", targets);
  43 }
  44
  45 void Dependency::EvaluateApplyRuleInstance(const Checkable::Ptr& checkable, const String& name, const Dictionary::Ptr& locals, const ApplyRule& rule)
  46 {
  47         DebugInfo di = rule.GetDebugInfo();
  48
  49         Log(LogDebug, "Dependency")
  50                 << "Applying dependency '" << name << "' to object '" << checkable->GetName() << "' for rule " << di;
  51
  52         ConfigItemBuilder::Ptr builder = new ConfigItemBuilder(di);
  53         builder->SetType("Dependency");
  54         builder->SetName(name);
  55         builder->SetScope(locals);
  56
  57         Host::Ptr host;
  58         Service::Ptr service;
  59         tie(host, service) = GetHostService(checkable);
  60
  61         builder->AddExpression(new SetExpression(MakeIndexer("parent_host_name"), OpSetLiteral, MakeLiteral(host->GetName()), di));
  62         builder->AddExpression(new SetExpression(MakeIndexer("child_host_name"), OpSetLiteral, MakeLiteral(host->GetName()), di));
  63
  64         if (service)
  65                 builder->AddExpression(new SetExpression(MakeIndexer("child_service_name"), OpSetLiteral, MakeLiteral(service->GetShortName()), di));
  66
  67         String zone = checkable->GetZone();
  68
  69         if (!zone.IsEmpty())
  70                 builder->AddExpression(new SetExpression(MakeIndexer("zone"), OpSetLiteral, MakeLiteral(zone), di));
  71
  72         builder->AddExpression(new OwnedExpression(rule.GetExpression()));
  73
  74         ConfigItem::Ptr dependencyItem = builder->Compile();
  75         DynamicObject::Ptr dobj = dependencyItem->Commit();
  76         dobj->OnConfigLoaded();
  77
  78 }
  79
  80 bool Dependency::EvaluateApplyRule(const Checkable::Ptr& checkable, const ApplyRule& rule)
  81 {
  82         DebugInfo di = rule.GetDebugInfo();
  83
  84         std::ostringstream msgbuf;
  85         msgbuf << "Evaluating 'apply' rule (" << di << ")";
  86         CONTEXT(msgbuf.str());
  87
  88         Host::Ptr host;
  89         Service::Ptr service;
  90         tie(host, service) = GetHostService(checkable);
  91
  92         Dictionary::Ptr locals = new Dictionary();
  93         locals->Set("__parent", rule.GetScope());
  94         locals->Set("host", host);
  95         if (service)
  96                 locals->Set("service", service);
  97
  98         if (!rule.EvaluateFilter(locals))
  99                 return false;
 100
 101         Value vinstances;
 102
 103         if (rule.GetFTerm()) {
 104                 vinstances = rule.GetFTerm()->Evaluate(locals);
 105         } else {
 106                 Array::Ptr instances = new Array();
 107                 instances->Add("");
 108                 vinstances = instances;
 109         }
 110
 111         if (vinstances.IsObjectType<Array>()) {
 112                 if (!rule.GetFVVar().IsEmpty())
 113                         BOOST_THROW_EXCEPTION(ConfigError("Array iterator requires value to be an array.") << errinfo_debuginfo(di));
 114
 115                 Array::Ptr arr = vinstances;
 116
 117                 ObjectLock olock(arr);
 118                 BOOST_FOREACH(const String& instance, arr) {
 119                         String name = rule.GetName();
 120
 121                         if (!rule.GetFKVar().IsEmpty()) {
 122                                 locals->Set(rule.GetFKVar(), instance);
 123                                 name += instance;
 124                         }
 125
 126                         EvaluateApplyRuleInstance(checkable, name, locals, rule);
 127                 }
 128         } else if (vinstances.IsObjectType<Dictionary>()) {
 129                 if (rule.GetFVVar().IsEmpty())
 130                         BOOST_THROW_EXCEPTION(ConfigError("Dictionary iterator requires value to be a dictionary.") << errinfo_debuginfo(di));
 131
 132                 Dictionary::Ptr dict = vinstances;
 133
 134                 ObjectLock olock(dict);
 135                 BOOST_FOREACH(const Dictionary::Pair& kv, dict) {
 136                         locals->Set(rule.GetFKVar(), kv.first);
 137                         locals->Set(rule.GetFVVar(), kv.second);
 138
 139                         EvaluateApplyRuleInstance(checkable, rule.GetName() + kv.first, locals, rule);
 140                 }
 141         }
 142
 143         return true;
 144 }
 145
 146 void Dependency::EvaluateApplyRules(const Host::Ptr& host)
 147 {
 148         CONTEXT("Evaluating 'apply' rules for host '" + host->GetName() + "'");
 149
 150         BOOST_FOREACH(ApplyRule& rule, ApplyRule::GetRules("Dependency"))
 151         {
 152                 if (rule.GetTargetType() != "Host")
 153                         continue;
 154
 155                 try {
 156                         if (EvaluateApplyRule(host, rule))
 157                                 rule.AddMatch();
 158                 } catch (const ConfigError& ex) {
 159                         const DebugInfo *di = boost::get_error_info<errinfo_debuginfo>(ex);
 160                         ConfigCompilerContext::GetInstance()->AddMessage(true, ex.what(), di ? *di : DebugInfo());
 161                 }
 162         }
 163 }
 164
 165 void Dependency::EvaluateApplyRules(const Service::Ptr& service)
 166 {
 167         CONTEXT("Evaluating 'apply' rules for service '" + service->GetName() + "'");
 168
 169         BOOST_FOREACH(ApplyRule& rule, ApplyRule::GetRules("Dependency"))
 170         {
 171                 if (rule.GetTargetType() != "Service")
 172                         continue;
 173
 174                 try {
 175                         if (EvaluateApplyRule(service, rule))
 176                                 rule.AddMatch();
 177                 } catch (const ConfigError& ex) {
 178                         const DebugInfo *di = boost::get_error_info<errinfo_debuginfo>(ex);
 179                         ConfigCompilerContext::GetInstance()->AddMessage(true, ex.what(), di ? *di : DebugInfo());
 180                 }
 181         }
 182 }