本文整理汇总了C++中NamespaceDetails::copyingFrom方法的典型用法代码示例。如果您正苦于以下问题：C++ NamespaceDetails::copyingFrom方法的具体用法？C++ NamespaceDetails::copyingFrom怎么用？C++ NamespaceDetails::copyingFrom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NamespaceDetails的用法示例。
在下文中一共展示了NamespaceDetails::copyingFrom方法的3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: Status
Status MMAPV1DatabaseCatalogEntry::_renameSingleNamespace( OperationContext* txn,
const StringData& fromNS,
const StringData& toNS,
bool stayTemp ) {
// some sanity checking
NamespaceDetails* fromDetails = _namespaceIndex.details( fromNS );
if ( !fromDetails )
return Status( ErrorCodes::BadValue, "from namespace doesn't exist" );
if ( _namespaceIndex.details( toNS ) )
return Status( ErrorCodes::BadValue, "to namespace already exists" );
// at this point, we haven't done anything destructive yet
// ----
// actually start moving
// ----
// this could throw, but if it does we're ok
_namespaceIndex.add_ns( txn, toNS, fromDetails );
NamespaceDetails* toDetails = _namespaceIndex.details( toNS );
try {
toDetails->copyingFrom(txn,
toNS,
_namespaceIndex,
fromDetails); // fixes extraOffset
}
catch( DBException& ) {
// could end up here if .ns is full - if so try to clean up / roll back a little
_namespaceIndex.kill_ns( txn, toNS );
throw;
}
// at this point, code .ns stuff moved
_namespaceIndex.kill_ns( txn, fromNS );
fromDetails = NULL;
// fix system.namespaces
BSONObj newSpec;
DiskLoc oldSpecLocation;
{
BSONObj oldSpec;
{
RecordStoreV1Base* rs = _getNamespaceRecordStore( txn, fromNS );
scoped_ptr<RecordIterator> it( rs->getIterator() );
while ( !it->isEOF() ) {
DiskLoc loc = it->getNext();
const Record* rec = it->recordFor( loc );
BSONObj entry( rec->data() );
if ( fromNS == entry["name"].String() ) {
oldSpecLocation = loc;
oldSpec = entry.getOwned();
break;
}
}
}
invariant( !oldSpec.isEmpty() );
invariant( !oldSpecLocation.isNull() );
BSONObjBuilder b;
BSONObjIterator i( oldSpec.getObjectField( "options" ) );
while( i.more() ) {
BSONElement e = i.next();
if ( strcmp( e.fieldName(), "create" ) != 0 ) {
if (stayTemp || (strcmp(e.fieldName(), "temp") != 0))
b.append( e );
}
else {
b << "create" << toNS;
}
}
newSpec = b.obj();
}
_addNamespaceToNamespaceCollection( txn, toNS, newSpec.isEmpty() ? 0 : &newSpec );
_getNamespaceRecordStore( txn, fromNS )->deleteRecord( txn, oldSpecLocation );
return Status::OK();
}示例2: _renameSingleNamespace
Status Database::_renameSingleNamespace( const StringData& fromNS, const StringData& toNS,
bool stayTemp ) {
// TODO: make it so we dont't need to do this
string fromNSString = fromNS.toString();
string toNSString = toNS.toString();
// some sanity checking
NamespaceDetails* fromDetails = _namespaceIndex.details( fromNS );
if ( !fromDetails )
return Status( ErrorCodes::BadValue, "from namespace doesn't exist" );
if ( _namespaceIndex.details( toNS ) )
return Status( ErrorCodes::BadValue, "to namespace already exists" );
// remove anything cached
{
scoped_lock lk( _collectionLock );
_collections.erase( fromNSString );
_collections.erase( toNSString );
}
ClientCursor::invalidate( fromNSString.c_str() );
ClientCursor::invalidate( toNSString.c_str() );
NamespaceDetailsTransient::eraseCollection( fromNSString ); // XXX
NamespaceDetailsTransient::eraseCollection( toNSString ); // XXX
// at this point, we haven't done anything destructive yet
// ----
// actually start moving
// ----
// this could throw, but if it does we're ok
_namespaceIndex.add_ns( toNS, fromDetails );
NamespaceDetails* toDetails = _namespaceIndex.details( toNS );
try {
toDetails->copyingFrom(toNSString.c_str(), fromDetails); // fixes extraOffset
}
catch( DBException& ) {
// could end up here if .ns is full - if so try to clean up / roll back a little
_namespaceIndex.kill_ns(toNSString.c_str());
throw;
}
// at this point, code .ns stuff moved
_namespaceIndex.kill_ns( fromNSString.c_str() );
fromDetails = NULL;
// fix system.namespaces
BSONObj newSpec;
{
BSONObj oldSpec;
if ( !Helpers::findOne( _namespacesName, BSON( "name" << fromNS ), oldSpec ) )
return Status( ErrorCodes::InternalError, "can't find system.namespaces entry" );
BSONObjBuilder b;
BSONObjIterator i( oldSpec.getObjectField( "options" ) );
while( i.more() ) {
BSONElement e = i.next();
if ( strcmp( e.fieldName(), "create" ) != 0 ) {
if (stayTemp || (strcmp(e.fieldName(), "temp") != 0))
b.append( e );
}
else {
b << "create" << toNS;
}
}
newSpec = b.obj();
}
addNewNamespaceToCatalog( toNSString.c_str(), newSpec.isEmpty() ? 0 : &newSpec );
deleteObjects( _namespacesName.c_str(), BSON( "name" << fromNS ), false, false, true );
return Status::OK();
}示例3: Status
Status MMAPV1DatabaseCatalogEntry::_renameSingleNamespace(OperationContext* txn,
StringData fromNS,
StringData toNS,
bool stayTemp) {
// some sanity checking
NamespaceDetails* fromDetails = _namespaceIndex.details(fromNS);
if (!fromDetails)
return Status(ErrorCodes::BadValue, "from namespace doesn't exist");
if (_namespaceIndex.details(toNS))
return Status(ErrorCodes::BadValue, "to namespace already exists");
// at this point, we haven't done anything destructive yet
// ----
// actually start moving
// ----
// this could throw, but if it does we're ok
_namespaceIndex.add_ns(txn, toNS, fromDetails);
NamespaceDetails* toDetails = _namespaceIndex.details(toNS);
try {
toDetails->copyingFrom(txn, toNS, _namespaceIndex, fromDetails); // fixes extraOffset
} catch (DBException&) {
// could end up here if .ns is full - if so try to clean up / roll back a little
_namespaceIndex.kill_ns(txn, toNS);
throw;
}
// at this point, code .ns stuff moved
_namespaceIndex.kill_ns(txn, fromNS);
fromDetails = NULL;
// fix system.namespaces
BSONObj newSpec;
RecordId oldSpecLocation = getCollectionCatalogEntry(fromNS)->getNamespacesRecordId();
invariant(!oldSpecLocation.isNull());
{
BSONObj oldSpec = _getNamespaceRecordStore()->dataFor(txn, oldSpecLocation).releaseToBson();
invariant(!oldSpec.isEmpty());
BSONObjBuilder b;
BSONObjIterator i(oldSpec.getObjectField("options"));
while (i.more()) {
BSONElement e = i.next();
if (strcmp(e.fieldName(), "create") != 0) {
if (stayTemp || (strcmp(e.fieldName(), "temp") != 0))
b.append(e);
} else {
b << "create" << toNS;
}
}
newSpec = b.obj();
}
RecordId rid = _addNamespaceToNamespaceCollection(txn, toNS, newSpec.isEmpty() ? 0 : &newSpec);
_getNamespaceRecordStore()->deleteRecord(txn, oldSpecLocation);
Entry*& entry = _collections[toNS.toString()];
invariant(entry == NULL);
txn->recoveryUnit()->registerChange(new EntryInsertion(toNS, this));
entry = new Entry();
_removeFromCache(txn->recoveryUnit(), fromNS);
_insertInCache(txn, toNS, rid, entry);
return Status::OK();
}