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143 lines
3.2 KiB
C++
143 lines
3.2 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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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; version 2 of
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the License.
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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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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
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/******************************************************************************************
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* $Id: writeonce.h 3495 2013-01-21 14:09:51Z rdempsey $
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*
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******************************************************************************************/
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/**
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* @file
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*/
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#ifndef CONFIG_WRITEONCECONFIG_H
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#define CONFIG_WRITEONCECONFIG_H
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#include <string>
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#ifndef _MSC_VER
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#include <tr1/unordered_map>
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#else
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#include <unordered_map>
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#endif
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#include <stddef.h>
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#include "bytestream.h"
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namespace config {
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/** @brief a write-once config file I/F class
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*
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* This class handles write-once config items
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*/
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class WriteOnceConfig
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{
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public:
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/** @brief ctor
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*
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*/
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explicit WriteOnceConfig(const char* cf=0);
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/** @brief ctor
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*
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*/
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explicit WriteOnceConfig(const std::string& cf) :
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fConfigFileName(cf)
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{
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setup();
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}
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/** @brief dtor
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*
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*/
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virtual ~WriteOnceConfig() {}
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/** @brief check if this class owns parm
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*
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*/
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bool owns(const std::string& section, const std::string& name) const {
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return (fEntryMap.find(std::string(section + "." + name)) != fEntryMap.end());
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}
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/** @brief set parm to value
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*
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* If you attempt to set a value more than once, and force is false, this will throw a runtime_error.
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*/
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void setConfig(const std::string& section, const std::string& name, const std::string& value, bool force=false);
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/** @brief get value of parm
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*
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*/
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const std::string getConfig(const std::string& section, const std::string& name) const;
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protected:
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/** @brief load from file
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*
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*/
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messageqcpp::ByteStream load();
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/** @brief save to file
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*
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*/
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void save(messageqcpp::ByteStream& ibs) const;
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/** @brief serialize to ByteStream
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*
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*/
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virtual void serialize(messageqcpp::ByteStream& obs) const;
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/** @brief load from ByteStream
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*
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*/
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virtual void unserialize(messageqcpp::ByteStream& ibs);
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private:
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typedef std::pair<std::string, bool> ConfigItem_t;
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typedef std::tr1::unordered_map<std::string, ConfigItem_t*> EntryMap_t;
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static const uint32_t WriteOnceConfigVersion = 1;
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//defaults okay
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//WriteOnceConfig(const WriteOnceConfig& rhs);
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//WriteOnceConfig& operator=(const WriteOnceConfig& rhs);
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/** @brief ctor helper
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*
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*/
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void setup();
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/** @brief setup defaults when file doesn't exist
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*
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*/
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void initializeDefaults();
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EntryMap_t fEntryMap;
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std::string fConfigFileName;
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ConfigItem_t fLBID_Shift;
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ConfigItem_t fDBRootCount;
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ConfigItem_t fDBRMRoot;
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ConfigItem_t fSharedMemoryTmpFile1;
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ConfigItem_t fTxnIDFile;
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ConfigItem_t fSharedMemoryTmpFile2;
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};
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}
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#endif
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