granicus.if.org Git - icinga2/blob - lib/icinga/servicegroup.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/servicegroup.hpp"
  21 #include "config/objectrule.hpp"
  22 #include "base/dynamictype.hpp"
  23 #include "base/objectlock.hpp"
  24 #include "base/logger.hpp"
  25 #include "base/context.hpp"
  26 #include "base/workqueue.hpp"
  27 #include <boost/foreach.hpp>
  28
  29 using namespace icinga;
  30
  31 REGISTER_TYPE(ServiceGroup);
  32
  33 INITIALIZE_ONCE(&ServiceGroup::RegisterObjectRuleHandler);
  34
  35 void ServiceGroup::RegisterObjectRuleHandler(void)
  36 {
  37         ObjectRule::RegisterType("ServiceGroup", &ServiceGroup::EvaluateObjectRules);
  38 }
  39
  40 bool ServiceGroup::EvaluateObjectRuleOne(const Service::Ptr& service, const ObjectRule& rule)
  41 {
  42         DebugInfo di = rule.GetDebugInfo();
  43
  44         std::ostringstream msgbuf;
  45         msgbuf << "Evaluating 'object' rule (" << di << ")";
  46         CONTEXT(msgbuf.str());
  47
  48         Host::Ptr host = service->GetHost();
  49
  50         Dictionary::Ptr locals = make_shared<Dictionary>();
  51         locals->Set("host", host);
  52         locals->Set("service", service);
  53
  54         if (!rule.EvaluateFilter(locals))
  55                 return false;
  56
  57         Log(LogDebug, "ServiceGroup")
  58             << "Assigning membership for group '" << rule.GetName() << "' to service '" << service->GetName() << "' for rule " << di;
  59
  60         String group_name = rule.GetName();
  61         ServiceGroup::Ptr group = ServiceGroup::GetByName(group_name);
  62
  63         if (!group) {
  64                 Log(LogCritical, "ServiceGroup")
  65                     << "Invalid membership assignment. Group '" << group_name << "' does not exist.";
  66                 return false;
  67         }
  68
  69         /* assign service group membership */
  70         group->ResolveGroupMembership(service, true);
  71
  72         /* update groups attribute for apply */
  73         service->AddGroup(group_name);
  74
  75         return true;
  76 }
  77
  78 void ServiceGroup::EvaluateObjectRule(const ObjectRule& rule)
  79 {
  80         BOOST_FOREACH(const Service::Ptr& service, DynamicType::GetObjectsByType<Service>()) {
  81                 CONTEXT("Evaluating group membership in '" + rule.GetName() + "' for service '" + service->GetName() + "'");
  82
  83                 EvaluateObjectRuleOne(service, rule);
  84         }
  85 }
  86
  87 void ServiceGroup::EvaluateObjectRules(const std::vector<ObjectRule>& rules)
  88 {
  89         ParallelWorkQueue upq;
  90
  91         BOOST_FOREACH(const ObjectRule& rule, rules) {
  92                 upq.Enqueue(boost::bind(ServiceGroup::EvaluateObjectRule, boost::cref(rule)));
  93         }
  94
  95         upq.Join();
  96 }
  97
  98 std::set<Service::Ptr> ServiceGroup::GetMembers(void) const
  99 {
 100         boost::mutex::scoped_lock lock(m_ServiceGroupMutex);
 101         return m_Members;
 102 }
 103
 104 void ServiceGroup::AddMember(const Service::Ptr& service)
 105 {
 106         boost::mutex::scoped_lock lock(m_ServiceGroupMutex);
 107         m_Members.insert(service);
 108 }
 109
 110 void ServiceGroup::RemoveMember(const Service::Ptr& service)
 111 {
 112         boost::mutex::scoped_lock lock(m_ServiceGroupMutex);
 113         m_Members.erase(service);
 114 }
 115
 116 bool ServiceGroup::ResolveGroupMembership(const Service::Ptr& service, bool add, int rstack) {
 117
 118         if (add && rstack > 20) {
 119                 Log(LogWarning, "ServiceGroup")
 120                     << "Too many nested groups for group '" << GetName() << "': Service '"
 121                     << service->GetName() << "' membership assignment failed.";
 122
 123                 return false;
 124         }
 125
 126         Array::Ptr groups = GetGroups();
 127
 128         if (groups && groups->GetLength() > 0) {
 129                 ObjectLock olock(groups);
 130
 131                 BOOST_FOREACH(const String& name, groups) {
 132                         ServiceGroup::Ptr group = ServiceGroup::GetByName(name);
 133
 134                         if (group && !group->ResolveGroupMembership(service, add, rstack + 1))
 135                                 return false;
 136                 }
 137         }
 138
 139         if (add)
 140                 AddMember(service);
 141         else
 142                 RemoveMember(service);
 143
 144         return true;
 145 }