Class CopyInImpl

  • All Implemented Interfaces:
    CopyIn, CopyOperation

    public class CopyInImpl
    extends CopyOperationImpl
    implements CopyIn

    COPY FROM STDIN operation.

    Anticipated flow: 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()

    • Constructor Detail

      • CopyInImpl

        public CopyInImpl()
    • Method Detail

      • writeToCopy

        public void writeToCopy​(byte[] data,
                                int off,
                                int siz)
                         throws java.sql.SQLException
        Description copied from interface: CopyIn
        Writes specified part of given byte array to an open and writable copy operation.
        Specified by:
        writeToCopy in interface CopyIn
        Parameters:
        data - array of bytes to write
        off - offset of first byte to write (normally zero)
        siz - number of bytes to write (normally buf.length)
        Throws:
        java.sql.SQLException - if the operation fails
      • writeToCopy

        public void writeToCopy​(ByteStreamWriter from)
                         throws java.sql.SQLException
        Description copied from interface: CopyIn
        Writes a ByteStreamWriter to an open and writable copy operation.
        Specified by:
        writeToCopy in interface CopyIn
        Parameters:
        from - the source of bytes, e.g. a ByteBufferByteStreamWriter
        Throws:
        java.sql.SQLException - if the operation fails
      • flushCopy

        public void flushCopy()
                       throws java.sql.SQLException
        Description copied from interface: CopyIn
        Force any buffered output to be sent over the network to the backend. In general this is a useless operation as it will get pushed over in due time or when endCopy is called. Some specific modified server versions (Truviso) want this data sooner. If you are unsure if you need to use this method, don't.
        Specified by:
        flushCopy in interface CopyIn
        Throws:
        java.sql.SQLException - if the operation fails.
      • endCopy

        public long endCopy()
                     throws java.sql.SQLException
        Description copied from interface: CopyIn
        Finishes copy operation successfully.
        Specified by:
        endCopy in interface CopyIn
        Returns:
        number of updated rows for server 8.2 or newer (see getHandledRowCount())
        Throws:
        java.sql.SQLException - if the operation fails.