mirror of https://github.com/Icinga/icinga2.git
326 lines
8.4 KiB
C++
326 lines
8.4 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2013 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "config/configitem.h"
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#include "config/configcompilercontext.h"
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#include "base/application.h"
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#include "base/dynamictype.h"
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#include "base/objectlock.h"
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#include "base/logger_fwd.h"
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#include "base/debug.h"
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#include <sstream>
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#include <boost/tuple/tuple.hpp>
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#include <boost/foreach.hpp>
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using namespace icinga;
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boost::mutex ConfigItem::m_Mutex;
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ConfigItem::ItemMap ConfigItem::m_Items;
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/**
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* Constructor for the ConfigItem class.
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*
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* @param type The object type.
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* @param name The name of the item.
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* @param unit The unit of the item.
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* @param abstract Whether the item is a template.
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* @param exprl Expression list for the item.
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* @param parents Parent objects for the item.
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* @param debuginfo Debug information.
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*/
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ConfigItem::ConfigItem(const String& type, const String& name,
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bool abstract, const ExpressionList::Ptr& exprl,
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const std::vector<String>& parents, const DebugInfo& debuginfo)
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: m_Type(type), m_Name(name), m_Abstract(abstract), m_Validated(false),
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m_ExpressionList(exprl), m_ParentNames(parents), m_DebugInfo(debuginfo)
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{
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}
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/**
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* Retrieves the type of the configuration item.
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*
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* @returns The type.
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*/
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String ConfigItem::GetType(void) const
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{
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return m_Type;
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}
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/**
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* Retrieves the name of the configuration item.
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*
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* @returns The name.
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*/
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String ConfigItem::GetName(void) const
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{
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return m_Name;
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}
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/**
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* Checks whether the item is abstract.
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*
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* @returns true if the item is abstract, false otherwise.
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*/
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bool ConfigItem::IsAbstract(void) const
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{
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return m_Abstract;
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}
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/**
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* Retrieves the debug information for the configuration item.
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*
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* @returns The debug information.
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*/
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DebugInfo ConfigItem::GetDebugInfo(void) const
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{
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return m_DebugInfo;
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}
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/**
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* Retrieves the expression list for the configuration item.
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*
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* @returns The expression list.
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*/
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ExpressionList::Ptr ConfigItem::GetExpressionList(void) const
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{
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return m_ExpressionList;
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}
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void ConfigItem::Link(void)
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{
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ObjectLock olock(this);
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m_LinkedExpressionList = make_shared<ExpressionList>();
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BOOST_FOREACH(const String& name, m_ParentNames) {
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ConfigItem::Ptr parent = ConfigItem::GetObject(m_Type, name);
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if (!parent) {
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std::ostringstream message;
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message << "Parent object '" << name << "' does not"
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" exist (" << m_DebugInfo << ")";
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ConfigCompilerContext::GetInstance()->AddMessage(true, message.str());
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} else {
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parent->Link();
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ExpressionList::Ptr pexprl = parent->GetLinkedExpressionList();
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m_LinkedExpressionList->AddExpression(Expression("", OperatorExecute, pexprl, m_DebugInfo));
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}
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}
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m_LinkedExpressionList->AddExpression(Expression("", OperatorExecute, m_ExpressionList, m_DebugInfo));
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}
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ExpressionList::Ptr ConfigItem::GetLinkedExpressionList(void) const
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{
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ObjectLock olock(this);
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return m_LinkedExpressionList;
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}
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/**
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* Commits the configuration item by creating or updating a DynamicObject
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* object.
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*
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* @returns The DynamicObject that was created/updated.
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*/
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DynamicObject::Ptr ConfigItem::Commit(void)
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{
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ASSERT(!OwnsLock());
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String type, name;
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Log(LogDebug, "base", "Commit called for ConfigItem Type=" + GetType() + ", Name=" + GetName());
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/* Make sure the type is valid. */
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DynamicType::Ptr dtype = DynamicType::GetByName(GetType());
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if (!dtype)
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BOOST_THROW_EXCEPTION(std::runtime_error("Type '" + GetType() + "' does not exist."));
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if (m_DynamicObject.lock() || dtype->GetObject(m_Name))
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BOOST_THROW_EXCEPTION(std::runtime_error("An object with type '" + GetType() + "' and name '" + GetName() + "' already exists."));
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if (IsAbstract())
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return DynamicObject::Ptr();
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/* Create a fake update in the format that
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* DynamicObject::Deserialize expects. */
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Dictionary::Ptr attrs = make_shared<Dictionary>();
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Link();
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Dictionary::Ptr properties = make_shared<Dictionary>();
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GetLinkedExpressionList()->Execute(properties);
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{
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ObjectLock olock(properties);
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String key;
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Value data;
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BOOST_FOREACH(boost::tie(key, data), properties) {
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attrs->Set(key, data);
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}
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}
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DynamicObject::Ptr dobj = dtype->CreateObject(attrs);
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dobj->Register();
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return dobj;
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}
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/**
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* Registers the configuration item.
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*/
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void ConfigItem::Register(void)
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{
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ASSERT(!OwnsLock());
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{
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ObjectLock olock(this);
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m_Items[std::make_pair(m_Type, m_Name)] = GetSelf();
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}
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}
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/**
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* Retrieves the DynamicObject that belongs to the configuration item.
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*
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* @returns The DynamicObject.
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*/
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DynamicObject::Ptr ConfigItem::GetDynamicObject(void) const
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{
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ObjectLock olock(this);
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return m_DynamicObject.lock();
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}
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/**
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* Retrieves a configuration item by type and name.
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*
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* @param type The type of the ConfigItem that is to be looked up.
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* @param name The name of the ConfigItem that is to be looked up.
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* @returns The configuration item.
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*/
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ConfigItem::Ptr ConfigItem::GetObject(const String& type, const String& name)
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{
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boost::mutex::scoped_lock lock(m_Mutex);
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ConfigItem::ItemMap::iterator it;
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it = m_Items.find(std::make_pair(type, name));
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if (it != m_Items.end())
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return it->second;
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return ConfigItem::Ptr();
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}
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void ConfigItem::ValidateItem(void)
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{
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if (m_Validated)
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return;
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ConfigType::Ptr ctype = ConfigType::GetByName(GetType());
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if (!ctype) {
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ConfigCompilerContext::GetInstance()->AddMessage(false, "No validation type found for object '" + GetName() + "' of type '" + GetType() + "'");
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return;
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}
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ctype->ValidateItem(GetSelf());
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m_Validated = true;
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}
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bool ConfigItem::ActivateItems(bool validateOnly)
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{
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if (ConfigCompilerContext::GetInstance()->HasErrors())
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return false;
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Log(LogInformation, "config", "Linking config items...");
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ConfigItem::Ptr item;
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BOOST_FOREACH(boost::tie(boost::tuples::ignore, item), m_Items) {
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item->Link();
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}
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if (ConfigCompilerContext::GetInstance()->HasErrors())
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return false;
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Log(LogInformation, "config", "Validating config items (step 1)...");
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BOOST_FOREACH(boost::tie(boost::tuples::ignore, item), m_Items) {
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item->ValidateItem();
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}
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if (ConfigCompilerContext::GetInstance()->HasErrors())
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return false;
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Log(LogInformation, "config", "Activating config items");
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std::vector<DynamicObject::Ptr> objects;
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BOOST_FOREACH(boost::tie(boost::tuples::ignore, item), m_Items) {
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DynamicObject::Ptr object = item->Commit();
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if (object)
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objects.push_back(object);
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}
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BOOST_FOREACH(const DynamicObject::Ptr& object, objects) {
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object->OnConfigLoaded();
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}
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Log(LogInformation, "config", "Validating config items (step 2)...");
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BOOST_FOREACH(boost::tie(boost::tuples::ignore, item), m_Items) {
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item->ValidateItem();
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}
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if (ConfigCompilerContext::GetInstance()->HasErrors())
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return false;
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if (validateOnly)
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return true;
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/* restore the previous program state */
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DynamicObject::RestoreObjects(Application::GetStatePath());
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BOOST_FOREACH(const DynamicType::Ptr& type, DynamicType::GetTypes()) {
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BOOST_FOREACH(const DynamicObject::Ptr& object, type->GetObjects()) {
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if (object->IsActive())
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continue;
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Log(LogDebug, "config", "Activating object '" + object->GetName() + "' of type '" + object->GetType()->GetName() + "'");
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object->Start();
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ASSERT(object->IsActive());
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}
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}
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return true;
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}
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void ConfigItem::DiscardItems(void)
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{
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m_Items.clear();
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}
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