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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
*/
/**
* \file rrfc.cpp
*
* Qpid asynchronous store plugin library
*
* File containing code for class mrg::journal::rrfc (rotating
* file controller). See comments in file rrfc.h for details.
*
* \author Kim van der Riet
*/
#include "qpid/legacystore/jrnl/rrfc.h"
#include <cerrno>
#include <fcntl.h>
#include <unistd.h>
#include "qpid/legacystore/jrnl/jerrno.h"
#include "qpid/legacystore/jrnl/jexception.h"
namespace mrg
{
namespace journal
{
rrfc::rrfc(const lpmgr* lpmp): rfc(lpmp), _fh(-1), _valid(false)
{}
rrfc::~rrfc()
{
close_fh();
}
void
rrfc::finalize()
{
unset_findex();
rfc::finalize();
}
void
rrfc::set_findex(const u_int16_t fc_index)
{
rfc::set_findex(fc_index);
open_fh(_curr_fc->fname());
}
void
rrfc::unset_findex()
{
set_invalid();
close_fh();
rfc::unset_findex();
}
iores
rrfc::rotate()
{
if (!_lpmp->num_jfiles())
throw jexception(jerrno::JERR__NINIT, "rrfc", "rotate");
u_int16_t next_fc_index = _fc_index + 1;
if (next_fc_index == _lpmp->num_jfiles())
next_fc_index = 0;
set_findex(next_fc_index);
return RHM_IORES_SUCCESS;
}
std::string
rrfc::status_str() const
{
std::ostringstream oss;
oss << "rrfc: " << rfc::status_str();
if (is_active())
oss << " fcntl[" << _fc_index << "]: " << _curr_fc->status_str();
return oss.str();
}
// === protected functions ===
void
rrfc::open_fh(const std::string& fn)
{
close_fh();
_fh = ::open(fn.c_str(), O_RDONLY | O_DIRECT);
if (_fh < 0)
{
std::ostringstream oss;
oss << "file=\"" << fn << "\"" << FORMAT_SYSERR(errno);
throw jexception(jerrno::JERR_RRFC_OPENRD, oss.str(), "rrfc", "open_fh");
}
}
void
rrfc::close_fh()
{
if (_fh >= 0)
{
::close(_fh);
_fh = -1;
}
}
} // namespace journal
} // namespace mrg
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