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#ifndef QPID_STORE_MSCLFS_LOG_H
#define QPID_STORE_MSCLFS_LOG_H
/*
*
* 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.
*
*/
#include <string>
#include <windows.h>
#include <clfsw32.h>
#include <qpid/sys/IntegerTypes.h>
namespace qpid {
namespace store {
namespace ms_clfs {
/**
* @class Log
*
* Represents a CLFS-housed log.
*/
class Log {
protected:
HANDLE handle;
ULONGLONG containerSize;
std::string logPath;
PVOID marshal;
// Give subclasses a chance to initialize a new log. Called after a new
// log is created, initial set of containers is added, and marshalling
// area is allocated.
virtual void initialize() {}
public:
struct TuningParameters {
size_t containerSize;
unsigned short containers;
unsigned short shrinkPct;
uint32_t maxWriteBuffers;
};
Log() : handle(INVALID_HANDLE_VALUE), containerSize(0), marshal(0) {}
virtual ~Log();
void open(const std::string& path, const TuningParameters& params);
virtual uint32_t marshallingBufferSize();
CLFS_LSN write(void* entry, uint32_t length, CLFS_LSN* prev = 0);
// Get the current base LSN of the log.
CLFS_LSN getBase();
// Move the log tail to the indicated LSN.
void moveTail(const CLFS_LSN& oldest);
};
}}} // namespace qpid::store::ms_clfs
#endif /* QPID_STORE_MSCLFS_LOG_H */
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