diff options
Diffstat (limited to 'cpp/src/qpid/legacystore/jrnl/rrfc.cpp')
-rw-r--r-- | cpp/src/qpid/legacystore/jrnl/rrfc.cpp | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/cpp/src/qpid/legacystore/jrnl/rrfc.cpp b/cpp/src/qpid/legacystore/jrnl/rrfc.cpp new file mode 100644 index 0000000000..fc6f5d427f --- /dev/null +++ b/cpp/src/qpid/legacystore/jrnl/rrfc.cpp @@ -0,0 +1,125 @@ +/* + * + * 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 |