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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.
*
*/
#ifndef QPID_LINEARSTORE_JOURNAL_LINEARFILECONTROLLER_H_
#define QPID_LINEARSTORE_JOURNAL_LINEARFILECONTROLLER_H_
#include <deque>
#include "qpid/linearstore/journal/aio.h"
#include "qpid/linearstore/journal/AtomicCounter.h"
#include "qpid/linearstore/journal/EmptyFilePoolTypes.h"
namespace qpid {
namespace linearstore {
namespace journal {
class EmptyFilePool;
class jcntl;
class JournalFile;
class LinearFileController
{
protected:
typedef std::deque<JournalFile*> JournalFileList_t;
typedef JournalFileList_t::iterator JournalFileListItr_t;
jcntl& jcntlRef_;
std::string journalDirectory_;
EmptyFilePool* emptyFilePoolPtr_;
AtomicCounter<uint64_t> fileSeqCounter_;
AtomicCounter<uint64_t> recordIdCounter_;
AtomicCounter<uint64_t> decrCounter_;
JournalFileList_t journalFileList_;
JournalFile* currentJournalFilePtr_;
smutex journalFileListMutex_;
public:
LinearFileController(jcntl& jcntlRef);
virtual ~LinearFileController();
void initialize(const std::string& journalDirectory,
EmptyFilePool* emptyFilePoolPtr,
uint64_t initialFileNumberVal);
void finalize();
void addJournalFile(JournalFile* journalFilePtr,
const uint32_t completedDblkCount,
const bool makeCurrentFlag);
efpDataSize_sblks_t dataSize_sblks() const;
efpFileSize_sblks_t fileSize_sblks() const;
void getNextJournalFile();
uint64_t getNextRecordId();
void removeFileToEfp(const std::string& fileName);
void restoreEmptyFile(const std::string& fileName);
void purgeEmptyFilesToEfp();
// Functions for manipulating counts of non-current JournalFile instances in journalFileList_
uint32_t getEnqueuedRecordCount(const efpFileCount_t fileSeqNumber);
uint32_t incrEnqueuedRecordCount(const efpFileCount_t fileSeqNumber);
uint32_t decrEnqueuedRecordCount(const efpFileCount_t fileSeqNumber);
uint32_t addWriteCompletedDblkCount(const efpFileCount_t fileSeqNumber,
const uint32_t a);
uint16_t decrOutstandingAioOperationCount(const efpFileCount_t fileSeqNumber);
// Pass-through functions for current JournalFile class
void asyncFileHeaderWrite(io_context_t ioContextPtr,
const uint16_t userFlags,
const uint64_t recordId,
const uint64_t firstRecordOffset);
void asyncPageWrite(io_context_t ioContextPtr,
aio_cb* aioControlBlockPtr,
void* data,
uint32_t dataSize_dblks);
uint64_t getCurrentFileSeqNum() const;
uint64_t getCurrentSerial() const;
bool isEmpty() const;
// Debug aid
const std::string status(const uint8_t indentDepth) const;
protected:
void addJournalFile(const std::string& fileName,
const efpIdentity_t& efpIdentity,
const uint64_t fileNumber,
const uint32_t completedDblkCount);
void assertCurrentJournalFileValid(const char* const functionName) const;
bool checkCurrentJournalFileValid() const;
JournalFile* find(const efpFileCount_t fileSeqNumber);
uint64_t getNextFileSeqNum();
void pullEmptyFileFromEfp();
};
typedef void (LinearFileController::*lfcAddJournalFileFn)(JournalFile* journalFilePtr,
const uint32_t completedDblkCount,
const bool makeCurrentFlag);
}}}
#endif // QPID_LINEARSTORE_JOURNAL_LINEARFILECONTROLLER_H_
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