mirror of https://gitee.com/bigwinds/arangodb
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 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 ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Jan Steemann
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "MMFilesWalLogfile.h"
|
|
#include "Basics/FileUtils.h"
|
|
#include "Basics/encoding.h"
|
|
#include "Basics/files.h"
|
|
#include "MMFiles/MMFilesDatafileHelper.h"
|
|
|
|
using namespace arangodb;
|
|
|
|
/// @brief create the logfile
|
|
MMFilesWalLogfile::MMFilesWalLogfile(MMFilesWalLogfile::IdType id,
|
|
MMFilesDatafile* df, StatusType status)
|
|
: _id(id), _users(0), _df(df), _status(status), _collectQueueSize(0) {}
|
|
|
|
/// @brief destroy the logfile
|
|
MMFilesWalLogfile::~MMFilesWalLogfile() { delete _df; }
|
|
|
|
/// @brief create a new logfile
|
|
MMFilesWalLogfile* MMFilesWalLogfile::createNew(std::string const& filename,
|
|
MMFilesWalLogfile::IdType id,
|
|
uint32_t size) {
|
|
std::unique_ptr<MMFilesDatafile> df(
|
|
MMFilesDatafile::create(filename, id, static_cast<uint32_t>(size), false));
|
|
|
|
if (df == nullptr) {
|
|
int res = TRI_errno();
|
|
|
|
if (res != TRI_ERROR_NO_ERROR) {
|
|
LOG_TOPIC("67643", ERR, arangodb::Logger::ENGINES) << "unable to create logfile '" << filename
|
|
<< "': " << TRI_errno_string(res);
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
MMFilesWalLogfile* logfile = new MMFilesWalLogfile(id, df.get(), StatusType::EMPTY);
|
|
df.release();
|
|
return logfile;
|
|
}
|
|
|
|
/// @brief open an existing logfile
|
|
MMFilesWalLogfile* MMFilesWalLogfile::openExisting(std::string const& filename,
|
|
MMFilesWalLogfile::IdType id,
|
|
bool wasCollected, bool ignoreErrors) {
|
|
std::unique_ptr<MMFilesDatafile> df(MMFilesDatafile::open(filename, ignoreErrors, false));
|
|
|
|
if (df == nullptr) {
|
|
int res = TRI_errno();
|
|
|
|
if (res != TRI_ERROR_NO_ERROR) {
|
|
LOG_TOPIC("6be8a", ERR, arangodb::Logger::ENGINES) << "unable to open logfile '" << filename
|
|
<< "': " << TRI_errno_string(res);
|
|
} else {
|
|
// cannot figure out the type of error
|
|
LOG_TOPIC("44b1f", ERR, arangodb::Logger::ENGINES)
|
|
<< "unable to open logfile '" << filename << "'";
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
StatusType status = StatusType::OPEN;
|
|
|
|
if (df->isSealed()) {
|
|
status = StatusType::SEALED;
|
|
}
|
|
|
|
if (wasCollected) {
|
|
// the logfile was already collected
|
|
status = StatusType::COLLECTED;
|
|
}
|
|
|
|
MMFilesWalLogfile* logfile = new MMFilesWalLogfile(id, df.get(), status);
|
|
df.release();
|
|
return logfile;
|
|
}
|
|
|
|
/// @brief reserve space and update the current write position
|
|
char* MMFilesWalLogfile::reserve(size_t size) {
|
|
return _df->advanceWritePosition(encoding::alignedSize<size_t>(size));
|
|
}
|