How to use

ReceiveString

method

in

org.postgresql.core.PGStream

private SQLWarning receiveNotification() throws IOException {
  String warnMsg = pgStream.ReceiveString();
  // Strip out the severity field so we have consistency with
  // the V3 protocol.  SQLWarning.getMessage should return just
  // the actual message.
  //
  int severityMark = warnMsg.indexOf(":");
  warnMsg = warnMsg.substring(severityMark+1).trim();
  if (logger.logDebug())
    logger.debug(" <=BE NoticeResponse(" + warnMsg + ")");
  return new SQLWarning(warnMsg);
}

private SQLException receiveErrorMessage() throws IOException {
  String errorMsg = pgStream.ReceiveString().trim();
  if (logger.logDebug())
    logger.debug(" <=BE ErrorResponse(" + errorMsg + ")");
  return new PSQLException(errorMsg, PSQLState.UNKNOWN_STATE);
}

private void receiveAsyncNotify() throws IOException {
  int msglen = pgStream.ReceiveInteger4();
  int pid = pgStream.ReceiveInteger4();
  String msg = pgStream.ReceiveString();
  String param = pgStream.ReceiveString();
  protoConnection.addNotification(new org.postgresql.core.Notification(msg, pid, param));
  if (logger.logDebug())
    logger.debug(" <=BE AsyncNotify(" + pid + "," + msg + "," + param + ")");
}

private String receiveCommandStatus() throws IOException {
  //TODO: better handle the msg len
  int l_len = pgStream.ReceiveInteger4();
  //read l_len -5 bytes (-4 for l_len and -1 for trailing \0)
  String status = pgStream.ReceiveString(l_len - 5);
  //now read and discard the trailing \0
  pgStream.Receive(1);
  if (logger.logDebug())
    logger.debug(" <=BE CommandStatus(" + status + ")");
  return status;
}

private void receiveAsyncNotify() throws IOException {
  int pid = pgStream.ReceiveInteger4();
  String msg = pgStream.ReceiveString();
  if (logger.logDebug())
    logger.debug(" <=BE AsyncNotify(pid=" + pid + ",msg=" + msg + ")");
  protoConnection.addNotification(new org.postgresql.core.Notification(msg, pid));
}

private SQLWarning receiveNoticeResponse() throws IOException {
  int nlen = pgStream.ReceiveInteger4();
  ServerErrorMessage warnMsg = new ServerErrorMessage(pgStream.ReceiveString(nlen - 4), logger.getLogLevel());
  if (logger.logDebug())
    logger.debug(" <=BE NoticeResponse(" + warnMsg.toString() + ")");
  return new PSQLWarning(warnMsg);
}

private SQLException receiveErrorResponse() throws IOException {
  // it's possible to get more than one error message for a query
  // see libpq comments wrt backend closing a connection
  // so, append messages to a string buffer and keep processing
  // check at the bottom to see if we need to throw an exception
  int elen = pgStream.ReceiveInteger4();
  String totalMessage = pgStream.ReceiveString(elen - 4);
  ServerErrorMessage errorMsg = new ServerErrorMessage(totalMessage, logger.getLogLevel());
  if (logger.logDebug())
    logger.debug(" <=BE ErrorMessage(" + errorMsg.toString() + ")");
  return new PSQLException(errorMsg);
}

private Field[] receiveFields() throws IOException
{
  int size = pgStream.ReceiveInteger2();
  Field[] fields = new Field[size];
  if (logger.logDebug())
    logger.debug(" <=BE RowDescription(" + fields.length + ")");
  for (int i = 0; i < fields.length; i++)
  {
    String columnLabel = pgStream.ReceiveString();
    int typeOid = pgStream.ReceiveInteger4();
    int typeLength = pgStream.ReceiveInteger2();
    int typeModifier = pgStream.ReceiveInteger4();
    fields[i] = new Field(columnLabel, columnLabel, typeOid, typeLength, typeModifier, 0, 0);
  }
  return fields;
}

String status = pgStream.ReceiveString();
String portalName = pgStream.ReceiveString();
if (logger.logDebug())
  logger.debug(" <=BE PortalName(" + portalName + ")");

ServerErrorMessage l_errorMsg = new ServerErrorMessage(pgStream.ReceiveString(l_elen - 4), logger.getLogLevel());
ServerErrorMessage l_warnMsg = new ServerErrorMessage(pgStream.ReceiveString(l_nlen - 4), logger.getLogLevel());
String name = pgStream.ReceiveString();
String value = pgStream.ReceiveString();

String errorMsg = pgStream.ReceiveString();
if (logger.logDebug())
  logger.debug(" <=BE ErrorResponse(" + errorMsg + ")");
String warnMsg = pgStream.ReceiveString();
if (logger.logDebug())
  logger.debug(" <=BE NoticeResponse(" + warnMsg + ")");

private Field[] receiveFields() throws IOException
{
  int l_msgSize = pgStream.ReceiveInteger4();
  int size = pgStream.ReceiveInteger2();
  Field[] fields = new Field[size];
  if (logger.logDebug())
    logger.debug(" <=BE RowDescription(" + size + ")");
  for (int i = 0; i < fields.length; i++)
  {
    String columnLabel = pgStream.ReceiveString();
    int tableOid = pgStream.ReceiveInteger4();
    short positionInTable = (short)pgStream.ReceiveInteger2();
    int typeOid = pgStream.ReceiveInteger4();
    int typeLength = pgStream.ReceiveInteger2();
    int typeModifier = pgStream.ReceiveInteger4();
    int formatType = pgStream.ReceiveInteger2();
    fields[i] = new Field(columnLabel,
               "",  /* name not yet determined */
               typeOid, typeLength, typeModifier, tableOid, positionInTable);
    fields[i].setFormat(formatType);
  }
  return fields;
}

String name = pgStream.ReceiveString();
String value = pgStream.ReceiveString();
if (logger.logDebug())
  logger.debug(" <=BE ParameterStatus(" + name + " = " + value + ")");

ServerErrorMessage errorMsg = new ServerErrorMessage(pgStream.ReceiveString(l_elen - 4), logger.getLogLevel());
if (logger.logDebug())
  logger.debug(" <=BE ErrorMessage(" + errorMsg + ")");

String errorMsg = pgStream.ReceiveString();
if (logger.logDebug())
  logger.debug(" <=BE ErrorMessage(" + errorMsg + ")");

ServerErrorMessage l_errorMsg = new ServerErrorMessage(pgStream.ReceiveString(l_elen - 4), logger.getLogLevel());

private SQLException receiveErrorMessage() throws IOException {
  String errorMsg = pgStream.ReceiveString().trim();
  if (logger.logDebug())
    logger.debug(" <=BE ErrorResponse(" + errorMsg + ")");
  return new PSQLException(errorMsg, PSQLState.UNKNOWN_STATE);
}

private void receiveAsyncNotify() throws IOException {
  int pid = pgStream.ReceiveInteger4();
  String msg = pgStream.ReceiveString();
  if (logger.logDebug())
    logger.debug(" <=BE AsyncNotify(pid=" + pid + ",msg=" + msg + ")");
  protoConnection.addNotification(new org.postgresql.core.Notification(msg, pid));
}

private SQLException receiveErrorResponse() throws IOException {
  // it's possible to get more than one error message for a query
  // see libpq comments wrt backend closing a connection
  // so, append messages to a string buffer and keep processing
  // check at the bottom to see if we need to throw an exception
  int elen = pgStream.ReceiveInteger4();
  String totalMessage = pgStream.ReceiveString(elen - 4);
  ServerErrorMessage errorMsg = new ServerErrorMessage(totalMessage, logger.getLogLevel());
  if (logger.logDebug())
    logger.debug(" <=BE ErrorMessage(" + errorMsg.toString() + ")");
  return new PSQLException(errorMsg);
}

private SQLWarning receiveNoticeResponse() throws IOException {
  int nlen = pgStream.ReceiveInteger4();
  ServerErrorMessage warnMsg = new ServerErrorMessage(pgStream.ReceiveString(nlen - 4), logger.getLogLevel());
  if (logger.logDebug())
    logger.debug(" <=BE NoticeResponse(" + warnMsg.toString() + ")");
  return new PSQLWarning(warnMsg);
}