private void readStartupMessages(
PGStream pgStream, ProtocolConnectionImpl protoConnection, Logger logger)
throws IOException, SQLException {
while (true) {
int beresp = pgStream.ReceiveChar();
switch (beresp) {
case 'Z':
// Ready For Query; we're done.
if (pgStream.ReceiveInteger4() != 5)
throw new IOException("unexpected length of ReadyForQuery packet");
char tStatus = (char) pgStream.ReceiveChar();
if (logger.logDebug()) logger.debug(" <=BE ReadyForQuery(" + tStatus + ")");
// Update connection state.
switch (tStatus) {
case 'I':
protoConnection.setTransactionState(ProtocolConnection.TRANSACTION_IDLE);
break;
case 'T':
protoConnection.setTransactionState(ProtocolConnection.TRANSACTION_OPEN);
break;
case 'E':
protoConnection.setTransactionState(ProtocolConnection.TRANSACTION_FAILED);
break;
default:
// Huh?
break;
}
return;
case 'K':
// BackendKeyData
int l_msgLen = pgStream.ReceiveInteger4();
if (l_msgLen != 12)
throw new PSQLException(
GT.tr("Protocol error. Session setup failed."),
PSQLState.CONNECTION_UNABLE_TO_CONNECT);
int pid = pgStream.ReceiveInteger4();
int ckey = pgStream.ReceiveInteger4();
if (logger.logDebug())
logger.debug(" <=BE BackendKeyData(pid=" + pid + ",ckey=" + ckey + ")");
protoConnection.setBackendKeyData(pid, ckey);
break;
case 'E':
// Error
int l_elen = pgStream.ReceiveInteger4();
ServerErrorMessage l_errorMsg =
new ServerErrorMessage(pgStream.ReceiveString(l_elen - 4), logger.getLogLevel());
if (logger.logDebug()) logger.debug(" <=BE ErrorMessage(" + l_errorMsg + ")");
throw new PSQLException(l_errorMsg);
case 'N':
// Warning
int l_nlen = pgStream.ReceiveInteger4();
ServerErrorMessage l_warnMsg =
new ServerErrorMessage(pgStream.ReceiveString(l_nlen - 4), logger.getLogLevel());
if (logger.logDebug()) logger.debug(" <=BE NoticeResponse(" + l_warnMsg + ")");
protoConnection.addWarning(new PSQLWarning(l_warnMsg));
break;
case 'S':
// ParameterStatus
int l_len = pgStream.ReceiveInteger4();
String name = pgStream.ReceiveString();
String value = pgStream.ReceiveString();
if (logger.logDebug())
logger.debug(" <=BE ParameterStatus(" + name + " = " + value + ")");
if (name.equals("server_version")) protoConnection.setServerVersion(value);
else if (name.equals("client_encoding")) {
if (!value.equals("UNICODE"))
throw new PSQLException(
GT.tr("Protocol error. Session setup failed."),
PSQLState.CONNECTION_UNABLE_TO_CONNECT);
pgStream.setEncoding(Encoding.getDatabaseEncoding("UNICODE"));
} else if (name.equals("standard_conforming_strings")) {
if (value.equals("on")) protoConnection.setStandardConformingStrings(true);
else if (value.equals("off")) protoConnection.setStandardConformingStrings(false);
else
throw new PSQLException(
GT.tr("Protocol error. Session setup failed."),
PSQLState.CONNECTION_UNABLE_TO_CONNECT);
}
break;
default:
if (logger.logDebug()) logger.debug("invalid message type=" + (char) beresp);
throw new PSQLException(
GT.tr("Protocol error. Session setup failed."),
PSQLState.CONNECTION_UNABLE_TO_CONNECT);
}
}
}
