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

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org)    *
   4  *                                                                            *
   5  * This program is free software; you can redistribute it and/or              *
   6  * modify it under the terms of the GNU General Public License                *
   7  * as published by the Free Software Foundation; either version 2             *
   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,            *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
  15  * You should have received a copy of the GNU General Public License          *
  16  * along with this program; if not, write to the Free Software Foundation     *
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19
  20 #include "icinga/notification.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(&Notification::RegisterApplyRuleHandler);
  36
  37 void Notification::RegisterApplyRuleHandler(void)
  38 {
  39         std::vector<String> targets;
  40         targets.push_back("Host");
  41         targets.push_back("Service");
  42         ApplyRule::RegisterType("Notification", targets, &Notification::EvaluateApplyRules);
  43 }
  44
  45 void Notification::EvaluateApplyRuleOneInstance(const Checkable::Ptr& checkable, const String& name, const Dictionary::Ptr& locals, const ApplyRule& rule)
  46 {
  47         DebugInfo di = rule.GetDebugInfo();
  48
  49         Log(LogDebug, "Notification")
  50             << "Applying notification '" << name << "' to object '" << checkable->GetName() << "' for rule " << di;
  51
  52         ConfigItemBuilder::Ptr builder = make_shared<ConfigItemBuilder>(di);
  53         builder->SetType("Notification");
  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(make_shared<Expression>(&Expression::OpSet,
  62             MakeArray(MakeArray(MakeLiteral("host_name")), OpSetLiteral),
  63             MakeLiteral(host->GetName()),
  64             di));
  65
  66         if (service) {
  67                 builder->AddExpression(make_shared<Expression>(&Expression::OpSet,
  68                     MakeArray(MakeArray(MakeLiteral("service_name")), OpSetLiteral),
  69                     MakeLiteral(service->GetShortName()),
  70                     di));
  71         }
  72
  73         String zone = checkable->GetZone();
  74
  75         if (!zone.IsEmpty()) {
  76                 builder->AddExpression(make_shared<Expression>(&Expression::OpSet,
  77                     MakeArray(MakeArray(MakeLiteral("zone")), OpSetLiteral),
  78                     MakeLiteral(zone),
  79                     di));
  80         }
  81
  82         builder->AddExpression(rule.GetExpression());
  83
  84         ConfigItem::Ptr notificationItem = builder->Compile();
  85         DynamicObject::Ptr dobj = notificationItem->Commit();
  86         dobj->OnConfigLoaded();
  87
  88 }
  89
  90 bool Notification::EvaluateApplyRuleOne(const Checkable::Ptr& checkable, const ApplyRule& rule)
  91 {
  92         DebugInfo di = rule.GetDebugInfo();
  93
  94         std::ostringstream msgbuf;
  95         msgbuf << "Evaluating 'apply' rule (" << di << ")";
  96         CONTEXT(msgbuf.str());
  97
  98         Host::Ptr host;
  99         Service::Ptr service;
 100         tie(host, service) = GetHostService(checkable);
 101
 102         Dictionary::Ptr locals = make_shared<Dictionary>();
 103         locals->Set("__parent", rule.GetScope());
 104         locals->Set("host", host);
 105         if (service)
 106                 locals->Set("service", service);
 107
 108         if (!rule.EvaluateFilter(locals))
 109                 return false;
 110
 111         Value vinstances;
 112
 113         if (rule.GetFTerm()) {
 114                 vinstances = rule.GetFTerm()->Evaluate(locals);
 115         } else {
 116                 Array::Ptr instances = make_shared<Array>();
 117                 instances->Add("");
 118                 vinstances = instances;
 119         }
 120
 121         if (vinstances.IsObjectType<Array>()) {
 122                 if (!rule.GetFVVar().IsEmpty())
 123                         BOOST_THROW_EXCEPTION(ConfigError("Array iterator requires value to be an array.") << errinfo_debuginfo(di));
 124
 125                 Array::Ptr arr = vinstances;
 126
 127                 ObjectLock olock(arr);
 128                 BOOST_FOREACH(const String& instance, arr) {
 129                         String name = rule.GetName();
 130
 131                         if (!rule.GetFKVar().IsEmpty()) {
 132                                 locals->Set(rule.GetFKVar(), instance);
 133                                 name += instance;
 134                         }
 135
 136                         EvaluateApplyRuleOneInstance(checkable, name, locals, rule);
 137                 }
 138         } else if (vinstances.IsObjectType<Dictionary>()) {
 139                 if (rule.GetFVVar().IsEmpty())
 140                         BOOST_THROW_EXCEPTION(ConfigError("Dictionary iterator requires value to be a dictionary.") << errinfo_debuginfo(di));
 141
 142                 Dictionary::Ptr dict = vinstances;
 143
 144                 ObjectLock olock(dict);
 145                 BOOST_FOREACH(const Dictionary::Pair& kv, dict) {
 146                         locals->Set(rule.GetFKVar(), kv.first);
 147                         locals->Set(rule.GetFVVar(), kv.second);
 148
 149                         EvaluateApplyRuleOneInstance(checkable, rule.GetName() + kv.first, locals, rule);
 150                 }
 151         }
 152
 153         return true;
 154 }
 155
 156 void Notification::EvaluateApplyRule(const ApplyRule& rule)
 157 {
 158         int apply_count = 0;
 159
 160         if (rule.GetTargetType() == "Host") {
 161                 apply_count = 0;
 162
 163                 BOOST_FOREACH(const Host::Ptr& host, DynamicType::GetObjectsByType<Host>()) {
 164                         CONTEXT("Evaluating 'apply' rules for host '" + host->GetName() + "'");
 165
 166                         try {
 167                                 if (EvaluateApplyRuleOne(host, rule))
 168                                         apply_count++;
 169                         } catch (const ConfigError& ex) {
 170                                 const DebugInfo *di = boost::get_error_info<errinfo_debuginfo>(ex);
 171                                 ConfigCompilerContext::GetInstance()->AddMessage(true, ex.what(), di ? *di : DebugInfo());
 172                         }
 173                 }
 174
 175                 if (apply_count == 0)
 176                         Log(LogWarning, "Notification")
 177                             << "Apply rule '" << rule.GetName() << "' for host does not match anywhere!";
 178
 179         } else if (rule.GetTargetType() == "Service") {
 180                 apply_count = 0;
 181
 182                 BOOST_FOREACH(const Service::Ptr& service, DynamicType::GetObjectsByType<Service>()) {
 183                         CONTEXT("Evaluating 'apply' rules for Service '" + service->GetName() + "'");
 184
 185                         try {
 186                                 if (EvaluateApplyRuleOne(service, rule))
 187                                         apply_count++;
 188                         } catch (const ConfigError& ex) {
 189                                 const DebugInfo *di = boost::get_error_info<errinfo_debuginfo>(ex);
 190                                 ConfigCompilerContext::GetInstance()->AddMessage(true, ex.what(), di ? *di : DebugInfo());
 191                         }
 192                 }
 193
 194                 if (apply_count == 0)
 195                         Log(LogWarning, "Notification")
 196                             << "Apply rule '" << rule.GetName() << "' for service does not match anywhere!";
 197
 198         } else {
 199                 Log(LogWarning, "Notification")
 200                     << "Wrong target type for apply rule '" << rule.GetName() << "'!";
 201         }
 202 }
 203 void Notification::EvaluateApplyRules(const std::vector<ApplyRule>& rules)
 204 {
 205         ParallelWorkQueue upq;
 206
 207         BOOST_FOREACH(const ApplyRule& rule, rules) {
 208                 upq.Enqueue(boost::bind(&Notification::EvaluateApplyRule, boost::cref(rule)));
 209         }
 210
 211         upq.Join();
 212 }