mirror of https://gitee.com/bigwinds/arangodb
144 lines
4.7 KiB
C++
144 lines
4.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Write-ahead logfile remover thread
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "RemoverThread.h"
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#include "Basics/logging.h"
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#include "Basics/ConditionLocker.h"
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#include "Basics/Exceptions.h"
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#include "Wal/LogfileManager.h"
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using namespace triagens::wal;
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// -----------------------------------------------------------------------------
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// --SECTION-- class RemoverThread
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief wait interval for the remover thread when idle
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////////////////////////////////////////////////////////////////////////////////
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uint64_t const RemoverThread::Interval = 500000;
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors and destructors
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create the remover thread
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////////////////////////////////////////////////////////////////////////////////
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RemoverThread::RemoverThread (LogfileManager* logfileManager)
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: Thread("WalRemover"),
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_logfileManager(logfileManager),
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_condition(),
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_stop(0) {
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allowAsynchronousCancelation();
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destroy the remover thread
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////////////////////////////////////////////////////////////////////////////////
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RemoverThread::~RemoverThread () {
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public methods
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief stops the remover thread
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////////////////////////////////////////////////////////////////////////////////
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void RemoverThread::stop () {
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if (_stop > 0) {
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return;
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}
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_stop = 1;
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_condition.signal();
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while (_stop != 2) {
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usleep(10000);
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}
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- Thread methods
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief main loop
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////////////////////////////////////////////////////////////////////////////////
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void RemoverThread::run () {
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while (true) {
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int stop = (int) _stop;
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bool worked = false;
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try {
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if (stop == 0) {
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worked = _logfileManager->removeLogfiles();
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}
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}
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catch (triagens::basics::Exception const& ex) {
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int res = ex.code();
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LOG_ERROR("got unexpected error in removerThread::run: %s", TRI_errno_string(res));
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}
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catch (...) {
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LOG_ERROR("got unspecific error in removerThread::run");
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}
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if (stop == 0 && ! worked) {
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// sleep only if there was nothing to do
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CONDITION_LOCKER(guard, _condition);
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guard.wait(Interval);
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}
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else if (stop == 1) {
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break;
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}
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// next iteration
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}
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_stop = 2;
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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