mirror of https://github.com/Icinga/icinga2.git
333 lines
8.5 KiB
C++
333 lines
8.5 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 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 "i2-config.h"
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using namespace icinga;
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ConfigItem::ItemMap ConfigItem::m_Items;
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boost::signal<void (const ConfigItem::Ptr&)> ConfigItem::OnCommitted;
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boost::signal<void (const ConfigItem::Ptr&)> ConfigItem::OnRemoved;
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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 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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const ExpressionList::Ptr& exprl, const vector<String>& parents,
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const DebugInfo& debuginfo)
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: m_Type(type), m_Name(name), m_ExpressionList(exprl),
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m_Parents(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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* 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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/**
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* Retrieves the list of parents for the configuration item.
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*
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* @returns The list of parents.
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*/
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vector<String> ConfigItem::GetParents(void) const
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{
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return m_Parents;
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}
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Dictionary::Ptr ConfigItem::Link(void) const
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{
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Dictionary::Ptr attrs = boost::make_shared<Dictionary>();
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InternalLink(attrs);
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return attrs;
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}
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/**
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* Calculates the object's properties based on parent objects and the object's
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* expression list.
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*
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* @param dictionary The dictionary that should be used to store the
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* properties.
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*/
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void ConfigItem::InternalLink(const Dictionary::Ptr& dictionary) const
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{
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BOOST_FOREACH(const String& name, m_Parents) {
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ConfigItem::Ptr parent = ConfigItem::GetObject(GetType(), name);
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if (!parent) {
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stringstream message;
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message << "Parent object '" << name << "' does not"
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" exist (" << m_DebugInfo << ")";
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throw_exception(domain_error(message.str()));
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}
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parent->InternalLink(dictionary);
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}
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m_ExpressionList->Execute(dictionary);
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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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Logger::Write(LogDebug, "base", "Commit called for ConfigItem Type=" + GetType() + ", Name=" + GetName());
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DynamicObject::Ptr dobj = m_DynamicObject.lock();
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Dictionary::Ptr properties = Link();
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/* Create a fake update in the format that
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* DynamicObject::ApplyUpdate expects. */
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Dictionary::Ptr attrs = boost::make_shared<Dictionary>();
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String key;
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Value data;
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BOOST_FOREACH(tie(key, data), properties) {
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Dictionary::Ptr attr = boost::make_shared<Dictionary>();
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attr->Set("data", data);
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attr->Set("type", Attribute_Config);
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attr->Set("tx", DynamicObject::GetCurrentTx());
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attrs->Set(key, attr);
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}
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Dictionary::Ptr update = boost::make_shared<Dictionary>();
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update->Set("attrs", attrs);
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update->Set("configTx", DynamicObject::GetCurrentTx());
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DynamicType::Ptr dtype = DynamicType::GetByName(GetType());
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if (!dtype)
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throw_exception(runtime_error("Type '" + GetType() + "' does not exist."));
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if (!dobj)
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dobj = dtype->GetObject(GetName());
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if (!dobj)
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dobj = dtype->CreateObject(update);
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else
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dobj->ApplyUpdate(update, Attribute_Config);
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m_DynamicObject = dobj;
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if (dobj->IsAbstract())
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dobj->Unregister();
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else
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dobj->Register();
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pair<String, String> ikey = make_pair(GetType(), GetName());
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ItemMap::iterator it = m_Items.find(ikey);
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/* unregister the old item from its parents */
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if (it != m_Items.end()) {
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ConfigItem::Ptr oldItem = it->second;
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oldItem->UnregisterFromParents();
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/* steal the old item's children */
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m_ChildObjects = oldItem->m_ChildObjects;
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}
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/* register this item with its parents */
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BOOST_FOREACH(const String& parentName, m_Parents) {
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ConfigItem::Ptr parent = GetObject(GetType(), parentName);
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parent->RegisterChild(GetSelf());
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}
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/* We need to make a copy of the child objects becauuse the
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* OnParentCommitted() handler is going to update the list. */
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set<ConfigItem::WeakPtr> children = m_ChildObjects;
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/* notify our children of the update */
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BOOST_FOREACH(const ConfigItem::WeakPtr wchild, children) {
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const ConfigItem::Ptr& child = wchild.lock();
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if (!child)
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continue;
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child->OnParentCommitted();
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}
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m_Items[ikey] = GetSelf();
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OnCommitted(GetSelf());
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return dobj;
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}
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/**
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* Unregisters the configuration item.
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*/
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void ConfigItem::Unregister(void)
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{
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DynamicObject::Ptr dobj = m_DynamicObject.lock();
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if (dobj)
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dobj->Unregister();
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ConfigItem::ItemMap::iterator it;
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it = m_Items.find(make_pair(GetType(), GetName()));
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if (it != m_Items.end())
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m_Items.erase(it);
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UnregisterFromParents();
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OnRemoved(GetSelf());
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}
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void ConfigItem::RegisterChild(const ConfigItem::Ptr& child)
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{
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m_ChildObjects.insert(child);
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}
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void ConfigItem::UnregisterChild(const ConfigItem::Ptr& child)
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{
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m_ChildObjects.erase(child);
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}
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void ConfigItem::UnregisterFromParents(void)
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{
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BOOST_FOREACH(const String& parentName, m_Parents) {
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ConfigItem::Ptr parent = GetObject(GetType(), parentName);
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if (parent)
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parent->UnregisterChild(GetSelf());
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}
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}
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/*
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* Notifies an item that one of its parents has been committed.
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*/
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void ConfigItem::OnParentCommitted(void)
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{
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if (GetObject(GetType(), GetName()) == static_cast<ConfigItem::Ptr>(GetSelf()))
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Commit();
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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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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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ConfigItem::ItemMap::iterator it;
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ConfigCompilerContext *context = ConfigCompilerContext::GetContext();
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if (context) {
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ConfigItem::Ptr item = context->GetItem(type, name);
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if (item)
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return item;
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/* ignore already active objects while we're in the compiler
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* context and linking to existing items is disabled. */
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if ((context->GetFlags() & CompilerLinkExisting) == 0)
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return ConfigItem::Ptr();
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}
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it = m_Items.find(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::Dump(ostream& fp) const
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{
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fp << "object \"" << m_Type << "\" \"" << m_Name << "\"";
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if (m_Parents.size() > 0) {
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fp << " inherits";
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bool first = true;
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BOOST_FOREACH(const String& name, m_Parents) {
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if (!first)
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fp << ",";
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else
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first = false;
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fp << " \"" << name << "\"";
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}
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}
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fp << " {" << "\n";
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m_ExpressionList->Dump(fp, 1);
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fp << "}" << "\n";
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}
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