本文整理汇总了C++中MongoDataFile::getHeader方法的典型用法代码示例。如果您正苦于以下问题：C++ MongoDataFile::getHeader方法的具体用法？C++ MongoDataFile::getHeader怎么用？C++ MongoDataFile::getHeader使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MongoDataFile的用法示例。
在下文中一共展示了MongoDataFile::getHeader方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: suitableFile
MongoDataFile* Database::suitableFile( const char *ns, int sizeNeeded, bool preallocate, bool enforceQuota ) {
// check existing files
for ( int i=numFiles()-1; i>=0; i-- ) {
MongoDataFile* f = getFile( i );
if ( f->getHeader()->unusedLength >= sizeNeeded ) {
// we don't enforce the quota on "special" namespaces as that could lead to problems -- e.g.
// rejecting an index insert after inserting the main record.
if( cmdLine.quota && enforceQuota && i > cmdLine.quotaFiles && !NamespaceString::special(ns) )
;
else
return f;
}
}
if( cmdLine.quota && enforceQuota && numFiles() >= cmdLine.quotaFiles && !NamespaceString::special(ns) )
uasserted(12501, "quota exceeded");
// allocate files until we either get one big enough or hit maxSize
for ( int i = 0; i < 8; i++ ) {
MongoDataFile* f = addAFile( sizeNeeded, preallocate );
if ( f->getHeader()->unusedLength >= sizeNeeded )
return f;
if ( f->getHeader()->fileLength >= MongoDataFile::maxSize() ) // this is as big as they get so might as well stop
return f;
}
uasserted(14810, "couldn't allocate space (suitableFile)"); // callers don't check for null return code
return 0;
}示例2: suitableFile
MongoDataFile* Database::suitableFile( const char *ns, int sizeNeeded, bool preallocate, bool enforceQuota ) {
// check existing files
for ( int i=numFiles()-1; i>=0; i-- ) {
MongoDataFile* f = getFile( i );
if ( f->getHeader()->unusedLength >= sizeNeeded ) {
if ( fileIndexExceedsQuota( ns, i-1, enforceQuota ) ) // NOTE i-1 is the value used historically for this check.
;
else
return f;
}
}
if ( fileIndexExceedsQuota( ns, numFiles(), enforceQuota ) )
uasserted(12501, "quota exceeded");
// allocate files until we either get one big enough or hit maxSize
for ( int i = 0; i < 8; i++ ) {
MongoDataFile* f = addAFile( sizeNeeded, preallocate );
if ( f->getHeader()->unusedLength >= sizeNeeded )
return f;
if ( f->getHeader()->fileLength >= MongoDataFile::maxSize() ) // this is as big as they get so might as well stop
return f;
}
uasserted(14810, "couldn't allocate space (suitableFile)"); // callers don't check for null return code
return 0;
}示例3: repairDatabasesAndCheckVersion
// ran at startup.
static void repairDatabasesAndCheckVersion() {
// LastError * le = lastError.get( true );
Client::GodScope gs;
log(1) << "enter repairDatabases (to check pdfile version #)" << endl;
//verify(checkNsFilesOnLoad);
checkNsFilesOnLoad = false; // we are mainly just checking the header - don't scan the whole .ns file for every db here.
Lock::GlobalWrite lk;
vector< string > dbNames;
getDatabaseNames( dbNames );
for ( vector< string >::iterator i = dbNames.begin(); i != dbNames.end(); ++i ) {
string dbName = *i;
log(1) << "\t" << dbName << endl;
Client::Context ctx( dbName );
MongoDataFile *p = cc().database()->getFile( 0 );
DataFileHeader *h = p->getHeader();
if ( !h->isCurrentVersion() || forceRepair ) {
if( h->version <= 0 ) {
uasserted(14026,
str::stream() << "db " << dbName << " appears corrupt pdfile version: " << h->version
<< " info: " << h->versionMinor << ' ' << h->fileLength);
}
log() << "****" << endl;
log() << "****" << endl;
log() << "need to upgrade database " << dbName << " with pdfile version " << h->version << "." << h->versionMinor << ", "
<< "new version: " << PDFILE_VERSION << "." << PDFILE_VERSION_MINOR << endl;
if ( shouldRepairDatabases ) {
// QUESTION: Repair even if file format is higher version than code?
log() << "\t starting upgrade" << endl;
string errmsg;
verify( doDBUpgrade( dbName , errmsg , h ) );
}
else {
log() << "\t Not upgrading, exiting" << endl;
log() << "\t run --upgrade to upgrade dbs, then start again" << endl;
log() << "****" << endl;
dbexit( EXIT_NEED_UPGRADE );
shouldRepairDatabases = 1;
return;
}
}
else {
Database::closeDatabase( dbName.c_str(), dbpath );
}
}
log(1) << "done repairDatabases" << endl;
if ( shouldRepairDatabases ) {
log() << "finished checking dbs" << endl;
cc().shutdown();
dbexit( EXIT_CLEAN );
}
checkNsFilesOnLoad = true;
}示例4: suitableFile
MongoDataFile* Database::suitableFile( int sizeNeeded, bool preallocate ) {
// check existing files
for ( int i=numFiles()-1; i>=0; i-- ) {
MongoDataFile* f = getFile( i );
if ( f->getHeader()->unusedLength >= sizeNeeded )
return f;
}
// allocate files until we either get one big enough or hit maxSize
for ( int i = 0; i < 8; i++ ) {
MongoDataFile* f = addAFile( sizeNeeded, preallocate );
if ( f->getHeader()->unusedLength >= sizeNeeded )
return f;
if ( f->getHeader()->fileLength >= MongoDataFile::maxSize() ) // this is as big as they get so might as well stop
return f;
}
return 0;
}示例5: repairDatabases
void repairDatabases() {
dblock lk;
vector< string > dbNames;
getDatabaseNames( dbNames );
for ( vector< string >::iterator i = dbNames.begin(); i != dbNames.end(); ++i ) {
string dbName = *i;
assert( !setClientTempNs( dbName.c_str() ) );
MongoDataFile *p = database->getFile( 0 );
MDFHeader *h = p->getHeader();
if ( !h->currentVersion() ) {
log() << "****" << endl;
log() << "****" << endl;
log() << "need to upgrade database " << dbName << " with pdfile version " << h->version << "." << h->versionMinor << ", "
<< "new version: " << VERSION << "." << VERSION_MINOR << endl;
if ( shouldRepairDatabases ){
// QUESTION: Repair even if file format is higher version than code?
log() << "\t starting repair" << endl;
string errmsg;
assert( repairDatabase( dbName.c_str(), errmsg ) );
}
else {
log() << "\t Not repairing, exiting!" << endl;
log() << "\t run --upgrade to upgrade dbs, then start again" << endl;
log() << "****" << endl;
dbexit( EXIT_NEED_UPGRADE );
shouldRepairDatabases = 1;
return;
}
} else {
closeClient( dbName.c_str() );
}
}
if ( shouldRepairDatabases ){
log() << "finished checking dbs" << endl;
dbexit( EXIT_CLEAN );
}
}