mirror of https://github.com/Icinga/icinga2.git
153 lines
4.4 KiB
C++
153 lines
4.4 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2014 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 "base/scriptvariable.hpp"
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#include "base/singleton.hpp"
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#include "base/logger.hpp"
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#include "base/stdiostream.hpp"
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#include "base/netstring.hpp"
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#include "base/convert.hpp"
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#include <boost/foreach.hpp>
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#include <fstream>
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using namespace icinga;
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ScriptVariable::ScriptVariable(const Value& data)
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: m_Data(data), m_Constant(false)
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{ }
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ScriptVariable::Ptr ScriptVariable::GetByName(const String& name)
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{
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return ScriptVariableRegistry::GetInstance()->GetItem(name);
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}
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void ScriptVariable::SetConstant(bool constant)
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{
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m_Constant = constant;
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}
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bool ScriptVariable::IsConstant(void) const
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{
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return m_Constant;
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}
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void ScriptVariable::SetData(const Value& data)
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{
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m_Data = data;
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}
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Value ScriptVariable::GetData(void) const
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{
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return m_Data;
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}
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Value ScriptVariable::Get(const String& name, const Value *defaultValue)
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{
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ScriptVariable::Ptr sv = GetByName(name);
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if (!sv) {
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if (defaultValue)
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return *defaultValue;
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BOOST_THROW_EXCEPTION(std::invalid_argument("Tried to access undefined script variable '" + name + "'"));
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}
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return sv->GetData();
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}
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ScriptVariable::Ptr ScriptVariable::Set(const String& name, const Value& value, bool overwrite, bool make_const)
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{
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ScriptVariable::Ptr sv = GetByName(name);
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if (!sv) {
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sv = make_shared<ScriptVariable>(value);
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ScriptVariableRegistry::GetInstance()->Register(name, sv);
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} else if (overwrite) {
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if (sv->IsConstant())
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BOOST_THROW_EXCEPTION(std::invalid_argument("Tried to modify read-only script variable '" + name + "'"));
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sv->SetData(value);
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}
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if (make_const)
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sv->SetConstant(true);
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return sv;
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}
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void ScriptVariable::Unregister(const String& name)
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{
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ScriptVariableRegistry::GetInstance()->Unregister(name);
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}
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void ScriptVariable::WriteVariablesFile(const String& filename)
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{
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Log(LogInformation, "ScriptVariable")
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<< "Dumping variables to file '" << filename << "'";
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String tempFilename = filename + ".tmp";
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std::fstream fp;
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fp.open(tempFilename.CStr(), std::ios_base::out);
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if (!fp)
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BOOST_THROW_EXCEPTION(std::runtime_error("Could not open '" + tempFilename + "' file"));
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StdioStream::Ptr sfp = make_shared<StdioStream>(&fp, false);
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BOOST_FOREACH(const ScriptVariableRegistry::ItemMap::value_type& kv, ScriptVariableRegistry::GetInstance()->GetItems()) {
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Dictionary::Ptr persistentVariable = make_shared<Dictionary>();
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persistentVariable->Set("name", kv.first);
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ScriptVariable::Ptr sv = kv.second;
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Value value = sv->GetData();
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if (value.IsObject())
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value = Convert::ToString(value);
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persistentVariable->Set("value", value);
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String json = JsonSerialize(persistentVariable);
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NetString::WriteStringToStream(sfp, json);
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}
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sfp->Close();
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fp.close();
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#ifdef _WIN32
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_unlink(filename.CStr());
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#endif /* _WIN32 */
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if (rename(tempFilename.CStr(), filename.CStr()) < 0) {
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BOOST_THROW_EXCEPTION(posix_error()
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<< boost::errinfo_api_function("rename")
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<< boost::errinfo_errno(errno)
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<< boost::errinfo_file_name(tempFilename));
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}
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}
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ScriptVariableRegistry *ScriptVariableRegistry::GetInstance(void)
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{
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return Singleton<ScriptVariableRegistry>::GetInstance();
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}
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