BatchedCommandRequest* msgToBatchDelete( const Message& deleteMsg ) {
// Parsing DbMessage throws
DbMessage dbMsg( deleteMsg );
NamespaceString nss( dbMsg.getns() );
int flags = dbMsg.pullInt();
const BSONObj query = dbMsg.nextJsObj();
int limit = ( flags & RemoveOption_JustOne ) ? 1 : 0;
// No exceptions from here on
BatchedDeleteDocument* deleteDoc = new BatchedDeleteDocument;
deleteDoc->setLimit( limit );
deleteDoc->setQuery( query );
BatchedCommandRequest* request =
new BatchedCommandRequest( BatchedCommandRequest::BatchType_Delete );
request->setNS( nss.ns() );
request->getDeleteRequest()->addToDeletes( deleteDoc );
return request;
}
bool WriteBatchExecutor::applyWriteItem( const BatchedCommandRequest& request,
int index,
WriteStats* stats,
BatchedErrorDetail* error ) {
const string& ns = request.getNS();
// Clear operation's LastError before starting.
_le->reset( true );
//uint64_t itemTimeMicros = 0;
bool opSuccess = true;
// Each write operation executes in its own PageFaultRetryableSection. This means that
// a single batch can throw multiple PageFaultException's, which is not the case for
// other operations.
PageFaultRetryableSection s;
while ( true ) {
try {
// Execute the write item as a child operation of the current operation.
CurOp childOp( _client, _client->curop() );
// TODO Modify CurOp "wrapped" constructor to take an opcode, so calling .reset()
// is unneeded
childOp.reset( _client->getRemote(), getOpCode( request.getBatchType() ) );
childOp.ensureStarted();
OpDebug& opDebug = childOp.debug();
opDebug.ns = ns;
{
Client::WriteContext ctx( ns );
switch ( request.getBatchType() ) {
case BatchedCommandRequest::BatchType_Insert:
opSuccess =
applyInsert( ns,
request.getInsertRequest()->getDocumentsAt( index ),
&childOp,
stats,
error );
break;
case BatchedCommandRequest::BatchType_Update:
opSuccess = applyUpdate( ns,
*request.getUpdateRequest()->getUpdatesAt( index ),
&childOp,
stats,
error );
break;
default:
dassert( request.getBatchType() ==
BatchedCommandRequest::BatchType_Delete );
opSuccess = applyDelete( ns,
*request.getDeleteRequest()->getDeletesAt( index ),
&childOp,
stats,
error );
break;
}
}
childOp.done();
//itemTimeMicros = childOp.totalTimeMicros();
opDebug.executionTime = childOp.totalTimeMillis();
opDebug.recordStats();
// Log operation if running with at least "-v", or if exceeds slow threshold.
if ( logger::globalLogDomain()->shouldLog( logger::LogSeverity::Debug( 1 ) )
|| opDebug.executionTime > cmdLine.slowMS + childOp.getExpectedLatencyMs() ) {
MONGO_TLOG(1) << opDebug.report( childOp ) << endl;
}
// TODO Log operation if logLevel >= 3 and assertion thrown (as assembleResponse()
// does).
// Save operation to system.profile if shouldDBProfile().
if ( childOp.shouldDBProfile( opDebug.executionTime ) ) {
profile( *_client, getOpCode( request.getBatchType() ), childOp );
}
break;
}
catch ( PageFaultException& e ) {
e.touch();
}
}
return opSuccess;
}