CopyInImpl
Anticipated flow of a COPY FROM STDIN operation:
CopyManager.copyIn()
->QueryExecutor.startCopy()
- sends given query to server
->processCopyResults():
- receives CopyInResponse from Server
- creates new CopyInImpl
->initCopy():
- receives copy metadata from server
->CopyInImpl.init()
->lock() connection for this operation
- if query fails an exception is thrown
- if query returns wrong CopyOperation, copyIn() cancels it before throwing exception
<-return: new CopyInImpl holding lock on connection
repeat CopyIn.writeToCopy() for all data
->CopyInImpl.writeToCopy()
->QueryExecutorImpl.writeToCopy()
- sends given data
->processCopyResults()
- parameterized not to block, just peek for new messages from server
- on ErrorResponse, waits until protocol is restored and unlocks connection
CopyIn.endCopy()
->CopyInImpl.endCopy()
->QueryExecutorImpl.endCopy()
- sends CopyDone
- processCopyResults()
- on CommandComplete
->CopyOperationImpl.handleCommandComplete()
- sets updatedRowCount when applicable
- on ReadyForQuery unlock() connection for use by other operations
<-return: CopyInImpl.getUpdatedRowCount() |