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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   6  * modify it under the terms of the GNU General Public License                *
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   8  * of the License, or (at your option) any later version.                     *
   9  *                                                                            *
  10  * This program is distributed in the hope that it will be useful,            *
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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, VMFrame& frame, 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(frame.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()), false, di));
  62         builder->AddExpression(new SetExpression(MakeIndexer("child_host_name"), OpSetLiteral, MakeLiteral(host->GetName()), false, di));
  63
  64         if (service)
  65                 builder->AddExpression(new SetExpression(MakeIndexer("child_service_name"), OpSetLiteral, MakeLiteral(service->GetShortName()), false, di));
  66
  67         String zone = checkable->GetZone();
  68
  69         if (!zone.IsEmpty())
  70                 builder->AddExpression(new SetExpression(MakeIndexer("zone"), OpSetLiteral, MakeLiteral(zone), false, di));
  71
  72         builder->AddExpression(new OwnedExpression(rule.GetExpression()));
  73
  74         ConfigItem::Ptr dependencyItem = builder->Compile();
  75         dependencyItem->Commit();
  76 }
  77
  78 bool Dependency::EvaluateApplyRule(const Checkable::Ptr& checkable, const ApplyRule& rule)
  79 {
  80         DebugInfo di = rule.GetDebugInfo();
  81
  82         std::ostringstream msgbuf;
  83         msgbuf << "Evaluating 'apply' rule (" << di << ")";
  84         CONTEXT(msgbuf.str());
  85
  86         Host::Ptr host;
  87         Service::Ptr service;
  88         tie(host, service) = GetHostService(checkable);
  89
  90         VMFrame frame;
  91         if (rule.GetScope())
  92                 rule.GetScope()->CopyTo(frame.Locals);
  93         frame.Locals->Set("host", host);
  94         if (service)
  95                 frame.Locals->Set("service", service);
  96
  97         if (!rule.EvaluateFilter(frame))
  98                 return false;
  99
 100         Value vinstances;
 101
 102         if (rule.GetFTerm()) {
 103                 vinstances = rule.GetFTerm()->Evaluate(frame);
 104         } else {
 105                 Array::Ptr instances = new Array();
 106                 instances->Add("");
 107                 vinstances = instances;
 108         }
 109
 110         if (vinstances.IsObjectType<Array>()) {
 111                 if (!rule.GetFVVar().IsEmpty())
 112                         BOOST_THROW_EXCEPTION(ConfigError("Array iterator requires value to be an array.") << errinfo_debuginfo(di));
 113
 114                 Array::Ptr arr = vinstances;
 115
 116                 ObjectLock olock(arr);
 117                 BOOST_FOREACH(const String& instance, arr) {
 118                         String name = rule.GetName();
 119
 120                         if (!rule.GetFKVar().IsEmpty()) {
 121                                 frame.Locals->Set(rule.GetFKVar(), instance);
 122                                 name += instance;
 123                         }
 124
 125                         EvaluateApplyRuleInstance(checkable, name, frame, rule);
 126                 }
 127         } else if (vinstances.IsObjectType<Dictionary>()) {
 128                 if (rule.GetFVVar().IsEmpty())
 129                         BOOST_THROW_EXCEPTION(ConfigError("Dictionary iterator requires value to be a dictionary.") << errinfo_debuginfo(di));
 130
 131                 Dictionary::Ptr dict = vinstances;
 132
 133                 ObjectLock olock(dict);
 134                 BOOST_FOREACH(const Dictionary::Pair& kv, dict) {
 135                         frame.Locals->Set(rule.GetFKVar(), kv.first);
 136                         frame.Locals->Set(rule.GetFVVar(), kv.second);
 137
 138                         EvaluateApplyRuleInstance(checkable, rule.GetName() + kv.first, frame, rule);
 139                 }
 140         }
 141
 142         return true;
 143 }
 144
 145 void Dependency::EvaluateApplyRules(const Host::Ptr& host)
 146 {
 147         CONTEXT("Evaluating 'apply' rules for host '" + host->GetName() + "'");
 148
 149         BOOST_FOREACH(ApplyRule& rule, ApplyRule::GetRules("Dependency"))
 150         {
 151                 if (rule.GetTargetType() != "Host")
 152                         continue;
 153
 154                 try {
 155                         if (EvaluateApplyRule(host, rule))
 156                                 rule.AddMatch();
 157                 } catch (const ConfigError& ex) {
 158                         const DebugInfo *di = boost::get_error_info<errinfo_debuginfo>(ex);
 159                         ConfigCompilerContext::GetInstance()->AddMessage(true, ex.what(), di ? *di : DebugInfo());
 160                 }
 161         }
 162 }
 163
 164 void Dependency::EvaluateApplyRules(const Service::Ptr& service)
 165 {
 166         CONTEXT("Evaluating 'apply' rules for service '" + service->GetName() + "'");
 167
 168         BOOST_FOREACH(ApplyRule& rule, ApplyRule::GetRules("Dependency"))
 169         {
 170                 if (rule.GetTargetType() != "Service")
 171                         continue;
 172
 173                 try {
 174                         if (EvaluateApplyRule(service, rule))
 175                                 rule.AddMatch();
 176                 } catch (const ConfigError& ex) {
 177                         const DebugInfo *di = boost::get_error_info<errinfo_debuginfo>(ex);
 178                         ConfigCompilerContext::GetInstance()->AddMessage(true, ex.what(), di ? *di : DebugInfo());
 179                 }
 180         }
 181 }