mirror of https://gitee.com/bigwinds/arangodb
140 lines
4.4 KiB
C++
140 lines
4.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief Write-ahead log logfile
|
|
///
|
|
/// @file
|
|
///
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2004-2013 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// @author Jan Steemann
|
|
/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "Logfile.h"
|
|
|
|
using namespace triagens::wal;
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- constructors and destructors
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief create the logfile
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
Logfile::Logfile (Logfile::IdType id,
|
|
TRI_datafile_t* df,
|
|
StatusType status)
|
|
: _id(id),
|
|
_df(df),
|
|
_status(status) {
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destroy the logfile
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
Logfile::~Logfile () {
|
|
if (_df != nullptr) {
|
|
TRI_CloseDatafile(_df);
|
|
TRI_FreeDatafile(_df);
|
|
}
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- public methods
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief create a new logfile
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
Logfile* Logfile::create (std::string const& filename,
|
|
Logfile::IdType id,
|
|
uint32_t size) {
|
|
TRI_datafile_t* df = TRI_CreateDatafile(filename.c_str(), id, static_cast<TRI_voc_size_t>(size), true);
|
|
|
|
if (df == nullptr) {
|
|
int res = TRI_errno();
|
|
|
|
if (res != TRI_ERROR_NO_ERROR) {
|
|
LOG_ERROR("unable to create logfile '%s': %s",
|
|
filename.c_str(),
|
|
TRI_errno_string(res));
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
Logfile* logfile = new Logfile(id, df, StatusType::EMPTY);
|
|
return logfile;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief open an existing logfile
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
Logfile* Logfile::open (std::string const& filename,
|
|
Logfile::IdType id) {
|
|
TRI_datafile_t* df = TRI_OpenDatafile(filename.c_str());
|
|
|
|
if (df == nullptr) {
|
|
int res = TRI_errno();
|
|
|
|
if (res != TRI_ERROR_NO_ERROR) {
|
|
LOG_ERROR("unable to open logfile '%s': %s",
|
|
filename.c_str(),
|
|
TRI_errno_string(res));
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
StatusType status = StatusType::OPEN;
|
|
|
|
if (df->_isSealed) {
|
|
status = StatusType::SEALED;
|
|
}
|
|
|
|
Logfile* logfile = new Logfile(id, df, status);
|
|
return logfile;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief seals a logfile
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int Logfile::seal () {
|
|
// we're not really sealing the logfile as this isn't required
|
|
int res = TRI_ERROR_NO_ERROR; // TRI_SealDatafile(_df);
|
|
|
|
_df->_isSealed = true;
|
|
_df->_state = TRI_DF_STATE_READ;
|
|
|
|
if (res == TRI_ERROR_NO_ERROR) {
|
|
LOG_TRACE("sealed logfile %llu", (unsigned long long) id());
|
|
|
|
setStatus(StatusType::SEALED);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|/// @page\\|// --SECTION--\\|/// @\\}"
|
|
// End:
|