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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 lpmgr.cpp
*
* Qpid asynchronous store plugin library
*
* File containing code for class mrg::journal::lpmgr (non-logging file
* handle), used for controlling journal log files. See comments in file
* lpmgr.h for details.
*
* \author Kim van der Riet
*/
#include "qpid/legacystore/jrnl/lpmgr.h"
#include <cassert>
#include <qpid/legacystore/jrnl/jerrno.h>
#include <qpid/legacystore/jrnl/jexception.h>
namespace mrg
{
namespace journal
{
lpmgr::lpmgr() : _ae(false), _ae_max_jfiles(0)
{}
lpmgr::~lpmgr()
{
finalize();
}
void
lpmgr::initialize(const u_int16_t num_jfiles,
const bool ae,
const u_int16_t ae_max_jfiles,
jcntl* const jcp,
new_obj_fn_ptr fp)
{
assert(jcp != 0);
finalize();
// Validate params
if (ae && ae_max_jfiles > 0 && ae_max_jfiles <= num_jfiles)
{
std::ostringstream oss;
oss << "ae_max_jfiles (" << ae_max_jfiles << ") <= num_jfiles (" << num_jfiles << ")";
throw jexception(jerrno::JERR_LFMGR_BADAEFNUMLIM, oss.str(), "lpmgr", "initialize");
}
_ae = ae;
_ae_max_jfiles = ae_max_jfiles;
const std::size_t num_res_files = ae
? (ae_max_jfiles ? ae_max_jfiles : JRNL_MAX_NUM_FILES)
: num_jfiles;
_fcntl_arr.reserve(num_res_files);
append(jcp, fp, num_jfiles);
}
void
lpmgr::recover(const rcvdat& rd,
jcntl* const jcp,
new_obj_fn_ptr fp)
{
assert(jcp != 0);
finalize();
// Validate rd params
if (rd._aemjf > 0 && rd._aemjf <= rd._njf)
{
std::ostringstream oss;
oss << "ae_max_jfiles (" << rd._aemjf << ") <= num_jfiles (" << rd._njf << ")";
throw jexception(jerrno::JERR_LFMGR_BADAEFNUMLIM, oss.str(), "lpmgr", "recover");
}
_ae = rd._ae;
_ae_max_jfiles = rd._aemjf;
const std::size_t num_res_files = rd._ae
? (rd._aemjf ? rd._aemjf : JRNL_MAX_NUM_FILES)
: rd._njf;
_fcntl_arr.reserve(num_res_files);
_fcntl_arr.assign(rd._njf, 0);
std::vector<u_int16_t> lfid_list(rd._fid_list.size(), 0);
for (std::size_t lid = 0; lid < rd._fid_list.size(); lid++)
lfid_list[rd._fid_list[lid]] = lid;
// NOTE: rd._fid_list may be smaller than rd._njf (journal may be empty or not yet file-cycled)
for (std::size_t pfid = 0; pfid < rd._njf; pfid++)
if (pfid < rd._fid_list.size())
_fcntl_arr[lfid_list[pfid]] = fp(jcp, lfid_list[pfid], pfid, &rd);
else
_fcntl_arr[pfid] = fp(jcp, pfid, pfid, &rd);
}
void
lpmgr::insert(const u_int16_t after_lfid,
jcntl* const jcp,
new_obj_fn_ptr fp,
const u_int16_t num_jfiles)
{
assert(jcp != 0);
assert(after_lfid < _fcntl_arr.size());
if (!_ae) throw jexception(jerrno::JERR_LFMGR_AEDISABLED, "lpmgr", "insert");
if (num_jfiles == 0) return;
std::size_t pfid = _fcntl_arr.size();
const u_int16_t eff_ae_max_jfiles = _ae_max_jfiles ? _ae_max_jfiles : JRNL_MAX_NUM_FILES;
if (pfid + num_jfiles > eff_ae_max_jfiles)
{
std::ostringstream oss;
oss << "num_files=" << pfid << " incr=" << num_jfiles << " limit=" << _ae_max_jfiles;
throw jexception(jerrno::JERR_LFMGR_AEFNUMLIMIT, oss.str(), "lpmgr", "insert");
}
for (std::size_t lid = after_lfid + 1; lid <= after_lfid + num_jfiles; lid++, pfid++)
_fcntl_arr.insert(_fcntl_arr.begin() + lid, fp(jcp, lid, pfid, 0));
for (std::size_t lid = after_lfid + num_jfiles + 1; lid < _fcntl_arr.size(); lid++)
{
fcntl* p = _fcntl_arr[lid];
assert(p != 0);
p->set_lfid(p->lfid() + num_jfiles);
}
}
void
lpmgr::finalize()
{
for (u_int32_t i = 0; i < _fcntl_arr.size(); i++)
delete _fcntl_arr[i];
_fcntl_arr.clear();
_ae = false;
_ae_max_jfiles = 0;
}
void
lpmgr::set_ae(const bool ae)
{
if (ae && _ae_max_jfiles > 0 && _ae_max_jfiles <= _fcntl_arr.size())
{
std::ostringstream oss;
oss << "ae_max_jfiles (" << _ae_max_jfiles << ") <= _fcntl_arr.size (" << _fcntl_arr.size() << ")";
throw jexception(jerrno::JERR_LFMGR_BADAEFNUMLIM, oss.str(), "lpmgr", "set_ae");
}
if (ae && _fcntl_arr.max_size() < _ae_max_jfiles)
_fcntl_arr.reserve(_ae_max_jfiles ? _ae_max_jfiles : JRNL_MAX_NUM_FILES);
_ae = ae;
}
void
lpmgr::set_ae_max_jfiles(const u_int16_t ae_max_jfiles)
{
if (_ae && ae_max_jfiles > 0 && ae_max_jfiles <= _fcntl_arr.size())
{
std::ostringstream oss;
oss << "ae_max_jfiles (" << _ae_max_jfiles << ") <= _fcntl_arr.size() (" << _fcntl_arr.size() << ")";
throw jexception(jerrno::JERR_LFMGR_BADAEFNUMLIM, oss.str(), "lpmgr", "set_ae_max_jfiles");
}
if (_ae && _fcntl_arr.max_size() < ae_max_jfiles)
_fcntl_arr.reserve(ae_max_jfiles ? ae_max_jfiles : JRNL_MAX_NUM_FILES);
_ae_max_jfiles = ae_max_jfiles;
}
u_int16_t
lpmgr::ae_jfiles_rem() const
{
if (_ae_max_jfiles > _fcntl_arr.size()) return _ae_max_jfiles - _fcntl_arr.size();
if (_ae_max_jfiles == 0) return JRNL_MAX_NUM_FILES - _fcntl_arr.size();
return 0;
}
// Testing functions
void
lpmgr::get_pfid_list(std::vector<u_int16_t>& pfid_list) const
{
pfid_list.clear();
for (std::size_t i = 0; i < _fcntl_arr.size(); i++)
pfid_list.push_back(_fcntl_arr[i]->pfid());
}
void
lpmgr::get_lfid_list(std::vector<u_int16_t>& lfid_list) const
{
lfid_list.clear();
lfid_list.assign(_fcntl_arr.size(), 0);
for (std::size_t i = 0; i < _fcntl_arr.size(); i++)
lfid_list[_fcntl_arr[i]->pfid()] = i;
}
// === protected fns ===
void
lpmgr::append(jcntl* const jcp,
new_obj_fn_ptr fp,
const u_int16_t num_jfiles)
{
std::size_t s = _fcntl_arr.size();
if (_ae_max_jfiles && s + num_jfiles > _ae_max_jfiles)
{
std::ostringstream oss;
oss << "num_files=" << s << " incr=" << num_jfiles << " limit=" << _ae_max_jfiles;
throw jexception(jerrno::JERR_LFMGR_AEFNUMLIMIT, oss.str(), "lpmgr", "append");
}
for (std::size_t i = s; i < s + num_jfiles; i++)
_fcntl_arr.push_back(fp(jcp, i, i, 0));
}
} // namespace journal
} // namespace mrg
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