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122 lines
3.6 KiB
C++
122 lines
3.6 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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#include "IDBFactory.h"
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#include <boost/thread.hpp>
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#include <sstream>
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#ifndef _MSC_VER
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#include <dlfcn.h>
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#endif
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#include <string.h>
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#include <errno.h>
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#include <iostream>
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#include "FileFactoryBase.h"
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#include "BufferedFileFactory.h"
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#include "UnbufferedFileFactory.h"
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#include "PosixFileSystem.h"
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#include "IDBLogger.h"
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using namespace std;
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namespace
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{
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boost::mutex fac_guard;
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}
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namespace idbdatafile
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{
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IDBFactory::FactoryMap IDBFactory::s_plugins;
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bool IDBFactory::installDefaultPlugins()
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{
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// protect these methods since we are changing our static data structure
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boost::mutex::scoped_lock lock( fac_guard );
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s_plugins[IDBDataFile::BUFFERED] = FileFactoryEnt(IDBDataFile::BUFFERED, "buffered", new BufferedFileFactory(), new PosixFileSystem());
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s_plugins[IDBDataFile::UNBUFFERED] = FileFactoryEnt(IDBDataFile::UNBUFFERED, "unbuffered", new UnbufferedFileFactory(), new PosixFileSystem());
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return false;
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}
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bool IDBFactory::installPlugin(const std::string& plugin)
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{
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#ifdef _MSC_VER
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ostringstream oss;
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oss << "InfiniDB for Windows does not support plugins: plugin = " << plugin;
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throw std::runtime_error(oss.str());
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#else
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// protect these methods since we are changing our static data structure
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boost::mutex::scoped_lock lock( fac_guard );
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void* handle = dlopen(plugin.c_str(), RTLD_LAZY);
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if ( handle == NULL )
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{
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std::ostringstream oss;
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oss << "IDBFactory::installPlugin: dlopen for " << plugin << " failed: " << dlerror();
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IDBLogger::syslog(oss.str(), logging::LOG_TYPE_ERROR);
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return false;
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}
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void* functor = dlsym(handle, "plugin_instance");
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if ( functor == NULL )
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{
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std::ostringstream oss;
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oss << "IDBFactory::installPlugin: dlsym for plugin_instance() failed. plugin " << plugin << dlerror();
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IDBLogger::syslog(oss.str(), logging::LOG_TYPE_ERROR);
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return false;
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}
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FileFactoryEnt ent = (*(FileFactoryEntryFunc)functor)();
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s_plugins[ent.type] = ent;
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std::ostringstream oss;
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oss << "IDBFactory::installPlugin: installed filesystem plugin " << plugin;
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IDBLogger::syslog(oss.str(), logging::LOG_TYPE_DEBUG);
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return true;
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#endif
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}
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IDBDataFile* IDBFactory::open(IDBDataFile::Types type, const char* fname, const char* mode, unsigned opts, unsigned colWidth)
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{
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if ( s_plugins.find(type) == s_plugins.end() )
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{
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ostringstream oss;
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oss << "Cannot find factory plugin type " << (int) type << " to open file: " << fname;
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throw std::runtime_error(oss.str());
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}
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return s_plugins[type].factory->open(fname, mode, opts, colWidth);
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}
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IDBFileSystem& IDBFactory::getFs(IDBDataFile::Types type)
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{
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if ( s_plugins.find(type) == s_plugins.end() )
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{
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ostringstream oss;
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oss << "Cannot find filesystem for plugin type " << (int) type;
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throw std::runtime_error(oss.str());
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}
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return *(s_plugins[type].filesystem);
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}
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}
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