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/* Copyright (c) 2008 PrimeBase Technologies GmbH, Germany
*
* PrimeBase Media Stream for MySQL
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Original author: Paul McCullagh
* Continued development: Barry Leslie
*
* 2007-06-26
*
* H&G2JCtL
*
* Contains all the information about an open database.
*
*/
#ifndef __DATABASE_MS_H__
#define __DATABASE_MS_H__
#include "CSDefs.h"
#include "CSStorage.h"
#include "CSStrUtil.h"
#include "Table_ms.h"
#include "Repository_ms.h"
#include "alias_ms.h"
#include "TempLog_ms.h"
#include "Compactor_ms.h"
#include "cloud.h"
class MSOpenTable;
class MSBackup;
class MSDatabase : public CSSharedRefObject {
public:
bool myIsPBMS;
csWord4 myDatabaseID;
CSString *myDatabaseName; // The database name may not be related to the database path,
CSString *myDatabasePath; // do not make any assumptions here!
CSSyncSparseArray *myTempLogArray;
MSCompactorThread *myCompactorThread;
MSTempLogThread *myTempLogThread;
CSSyncVector *myRepostoryList;
CloudDB *myBlobCloud;
csWord1 myBlobType; // Cloud or repository
MSDatabase();
virtual ~MSDatabase();
const char *getDatabaseNameCString();
MSTable *getTable(CSString *tab_name, bool create);
MSTable *getTable(const char *tab_name, bool create);
MSTable *getTable(csWord4 tab_id, bool missing_ok);
MSTable *getNextTable(csWord4 *pos);
void addTable(csWord4 tab_id, const char *tab_name, off_t file_size, bool to_delete);
void addTableFromFile(CSDirectory *dir, const char *file_name, bool to_delete);
void removeTable(MSTable *tab);
void dropTable(MSTable *tab);
void renameTable(MSTable *tab, const char *to_name);
CSString *getATableName();
u_int getTableCount();
void openWriteRepo(MSOpenTable *otab);
MSRepository *getRepoFullOfTrash(time_t *wait_time);
MSRepository *lockRepo(off_t size);
void removeRepo(csWord4 repo_id, bool *mustQuit);
MSRepoFile *getRepoFileFromPool(csWord4 repo_id, bool missing_ok);
void returnRepoFileToPool(MSRepoFile *file);
csWord8 newBlobRefId() // Returns a unique blob referfence Id.
{
csWord8 id;
enter_();
lock_(&iBlobRefIdLock);
id = iNextBlobRefId++;
unlock_(&iBlobRefIdLock);
return_(COMMIT_MASK(id));
}
private:
void queueTempLogEvent(MSOpenTable *otab, int type, csWord4 tab_id, csWord8 blob_id, csWord4 auth_code, csWord4 *log_id, csWord4 *log_offset, csWord4 *q_time);
public:
void queueForDeletion(MSOpenTable *otab, int type, csWord4 tab_id, csWord8 blob_id, csWord4 auth_code, csWord4 *log_id, csWord4 *log_offset, csWord4 *q_time, MSDiskAliasPtr aliasDiskRec);
MSTempLogFile *openTempLogFile(csWord4 log_id, size_t *log_rec_size, size_t *log_head_size);
u_int getTempLogCount();
void removeTempLog(csWord4 log_id);
/* Make this object sortable: */
virtual CSObject *getKey();
virtual int compareKey(CSObject *);
MSCompactorThread *getCompactorThread();
CSSyncVector *getRepositoryList();
bool findBlobWithAlias(const char *alias, csWord4 *repo_id = NULL, csWord8 *repo_offset = NULL)
{
bool found;
csWord4 x_repo_id;
csWord8 x_repo_offset;
bool referenced; // The BLOB can be referenced or non referenced.
enter_();
if (!repo_id) repo_id = &x_repo_id;
if (!repo_offset) repo_offset = &x_repo_offset;
lock_(&iBlobAliaseLock);
found = iBlobAliases->findBlobByAlias(alias, &referenced, repo_id, repo_offset);
unlock_(&iBlobAliaseLock);
return_(found);
}
csWord4 registerBlobAlias(csWord4 repo_id, csWord8 repo_offset, const char *alias);
csWord4 updateBlobAlias(csWord4 repo_id, csWord8 repo_offset, csWord4 old_alias_hash, const char *alias);
void deleteBlobAlias(MSDiskAliasPtr diskRec);
void deleteBlobAlias(csWord4 repo_id, csWord8 repo_offset, csWord4 alias_hash);
void moveBlobAlias(csWord4 old_repo_id, csWord8 old_repo_offset, csWord4 alias_hash, csWord4 new_repo_id, csWord8 new_repo_offset);
bool isValidHeaderField(const char *name);
bool isRecovering() { return iRecovering;} // Indicates the database is being recovered from a dump.
void setRecovering(bool recovering) { // Indicate if the database is being recovered from a dump.
if (iRecovering == recovering)
return;
iRecovering = recovering;
if (iRecovering) {
myCompactorThread->suspend();
myTempLogThread->suspend();
} else {
myCompactorThread->resume();
myTempLogThread->resume();
}
}
bool isBackup;
void setBackupDatabase(); // Signals the database that it is the destination for a backup process.
void releaseBackupDatabase();
void startBackup(MSBackupInfo *backup_info);
void terminateBackup();
bool backupStatus(csWord8 *total, csWord8 *completed, bool *completed_ok);
csWord4 backupID();
private:
MSBackup *iBackupThread;
csWord4 iBackupTime; // The time at which the backup was started.
bool iRecovering;
MSAlias *iBlobAliases;
CSLock iBlobAliaseLock; // Write lock for the BLOB aliases index. This is required because of the .
bool iClosing;
CSSyncSortedList *iTableList;
CSSparseArray *iTableArray;
csWord4 iMaxTableID;
MSTempLog *iWriteTempLog;
bool iDropping;
void dropDatabase();
void startThreads();
CSLock iBlobRefIdLock; // Lock for the BLOB ref counter.
csWord8 iNextBlobRefId;
public:
static csWord8 gBackupDatabaseID;
static csWord8 gRepoThreshold;
static csWord8 gTempLogThreshold;
CSSyncSortedList iHTTPMetaDataHeaders;
static void startUp(const char *default_http_headers);
static void stopThreads();
static void shutDown();
static MSDatabase *getBackupDatabase(CSString *db_location, CSString *db_name, csWord4 db_id, bool create);
static MSDatabase *getDatabase(CSString *db_name, bool create);
static MSDatabase *getDatabase(const char *db_name, bool create);
static MSDatabase *getDatabase(csWord4 db_id);
static csWord4 getDatabaseID(CSString *db_name, bool create);
static csWord4 getDatabaseID(const char *db_name, bool create);
static void wakeTempLogThreads();
static void dropDatabase(MSDatabase *doomedDatabase, const char *db_name = NULL);
static void dropDatabase(const char *db_name);
static bool convertTablePathToIDs(const char *path, csWord4 *db_id, csWord4 *tab_id, bool create);
static bool convertTableAndDatabaseToIDs(const char *db_name, const char *tab_name, csWord4 *db_id, csWord4 *tab_id, bool create);
private:
static CSSyncSortedList *gDatabaseList;
static CSSparseArray *gDatabaseArray;
static void removeDatabasePath(CSString *doomedDatabasePath);
static csWord4 getDBID(CSPath *path, CSString *db_name);
static CSPath *createDatabasePath(const char *location, CSString *db_name, csWord4 *db_id_ptr, bool *create, bool is_pbms = false);
static MSDatabase *newDatabase(const char *db_location, CSString *db_name, csWord4 db_id, bool create);
static MSDatabase *loadDatabase(CSString *db_name, bool create);
};
#endif
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