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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_LINEARFILECONTROLLER_H_
#define QPID_LINEARSTORE_LINEARFILECONTROLLER_H_
#include <deque>
#include "qpid/linearstore/jrnl/aio.h"
#include "qpid/linearstore/jrnl/AtomicCounter.h"
#include "qpid/linearstore/jrnl/EmptyFilePoolTypes.h"
#include "qpid/linearstore/jrnl/smutex.h"
struct file_hdr_t;
namespace qpid {
namespace qls_jrnl {
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;
JournalFile* currentJournalFilePtr;
AtomicCounter<uint64_t> fileSeqCounter;
AtomicCounter<uint64_t> recordIdCounter;
JournalFileList_t journalFileList;
smutex journalFileListMutex;
public:
LinearFileController(jcntl& jcntlRef_);
virtual ~LinearFileController();
void initialize(const std::string& journalDirectory_, EmptyFilePool* emptyFilePoolPtr_);
void finalize();
void pullEmptyFileFromEfp();
void purgeFilesToEfp();
efpDataSize_kib_t dataSize_kib() const;
efpFileSize_kib_t fileSize_kib() const;
efpDataSize_sblks_t dataSize_sblks() const;
efpFileSize_sblks_t fileSize_sblks() const;
uint64_t getNextRecordId();
// Functions for manipulating counts of non-current JournalFile instances in journalFileList
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 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;
uint32_t getEnqueuedRecordCount() const;
uint32_t incrEnqueuedRecordCount();
uint32_t addEnqueuedRecordCount(const uint32_t a);
uint32_t decrEnqueuedRecordCount();
uint32_t subtrEnqueuedRecordCount(const uint32_t s);
uint32_t getWriteSubmittedDblkCount() const;
uint32_t addWriteSubmittedDblkCount(const uint32_t a);
uint32_t getWriteCompletedDblkCount() const;
uint32_t addWriteCompletedDblkCount(const uint32_t a);
uint16_t getOutstandingAioOperationCount() const;
uint16_t incrOutstandingAioOperationCount();
uint16_t decrOutstandingAioOperationCount();
bool isEmpty() const; // True if no writes of any kind have occurred
bool isDataEmpty() const; // True if only file header written, data is still empty
u_int32_t dblksRemaining() const; // Dblks remaining until full
bool isFull() const; // True if all possible dblks have been submitted (but may not yet have returned from AIO)
bool isFullAndComplete() const; // True if all submitted dblks have returned from AIO
u_int32_t getOutstandingAioDblks() const; // Dblks still to be written
bool getNextFile() const; // True when next file is needed
// Debug aid
const std::string status(const uint8_t indentDepth) const;
protected:
bool checkCurrentJournalFileValid() const;
void assertCurrentJournalFileValid(const char* const functionName) const;
JournalFile* find(const efpFileCount_t fileSeqNumber); // NOT THREAD SAFE - use under external lock
uint64_t getNextFileSeqNum();
};
}} // namespace qpid::qls_jrnl
#endif // QPID_LINEARSTORE_LINEARFILECONTROLLER_H_
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