Java Code Examples for com.mysql.cj.exceptions.UnableToConnectException

The following examples show how to use com.mysql.cj.exceptions.UnableToConnectException. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
protected SocketFactory createSocketFactory(String socketFactoryClassName) {
    try {
        if (socketFactoryClassName == null) {
            throw ExceptionFactory.createException(UnableToConnectException.class, Messages.getString("SocketConnection.0"), getExceptionInterceptor());
        }

        Object sf = Class.forName(socketFactoryClassName).newInstance();
        if (sf instanceof SocketFactory) {
            return (SocketFactory) (Class.forName(socketFactoryClassName).newInstance());
        }

        // wrap legacy socket factories
        return new SocketFactoryWrapper(sf);
    } catch (InstantiationException | IllegalAccessException | ClassNotFoundException | CJException ex) {
        throw ExceptionFactory.createException(UnableToConnectException.class,
                Messages.getString("SocketConnection.1", new String[] { socketFactoryClassName }), getExceptionInterceptor());
    }
}
 
Example 2
Source Project: lams   Source File: ConnectionImpl.java    License: GNU General Public License v2.0 6 votes vote down vote up
/**
 * Creates an IO channel to the server
 * 
 * @param isForReconnect
 *            is this request for a re-connect
 * @throws CommunicationsException
 */
public void createNewIO(boolean isForReconnect) {
    synchronized (getConnectionMutex()) {
        // Synchronization Not needed for *new* connections, but defintely for connections going through fail-over, since we might get the new connection up
        // and running *enough* to start sending cached or still-open server-side prepared statements over to the backend before we get a chance to
        // re-prepare them...

        try {
            if (!this.autoReconnect.getValue()) {
                connectOneTryOnly(isForReconnect);

                return;
            }

            connectWithRetries(isForReconnect);
        } catch (SQLException ex) {
            throw ExceptionFactory.createException(UnableToConnectException.class, ex.getMessage(), ex);
        }
    }
}
 
Example 3
Source Project: FoxTelem   Source File: ConnectionImpl.java    License: GNU General Public License v3.0 6 votes vote down vote up
@Override
public void createNewIO(boolean isForReconnect) {
    synchronized (getConnectionMutex()) {
        // Synchronization Not needed for *new* connections, but defintely for connections going through fail-over, since we might get the new connection up
        // and running *enough* to start sending cached or still-open server-side prepared statements over to the backend before we get a chance to
        // re-prepare them...

        try {
            if (!this.autoReconnect.getValue()) {
                connectOneTryOnly(isForReconnect);

                return;
            }

            connectWithRetries(isForReconnect);
        } catch (SQLException ex) {
            throw ExceptionFactory.createException(UnableToConnectException.class, ex.getMessage(), ex);
        }
    }
}
 
Example 4
protected SocketFactory createSocketFactory(String socketFactoryClassName) {
    try {
        if (socketFactoryClassName == null) {
            throw ExceptionFactory.createException(UnableToConnectException.class, Messages.getString("SocketConnection.0"), getExceptionInterceptor());
        }

        Object sf = Class.forName(socketFactoryClassName).newInstance();
        if (sf instanceof SocketFactory) {
            return (SocketFactory) (Class.forName(socketFactoryClassName).newInstance());
        }

        // wrap legacy socket factories
        return new SocketFactoryWrapper(sf);
    } catch (InstantiationException | IllegalAccessException | ClassNotFoundException | CJException ex) {
        throw ExceptionFactory.createException(UnableToConnectException.class,
                Messages.getString("SocketConnection.1", new String[] { socketFactoryClassName }), getExceptionInterceptor());
    }
}
 
Example 5
Source Project: quarkus   Source File: MySQLJDBCReflections.java    License: Apache License 2.0 5 votes vote down vote up
@BuildStep
void registerExceptionsForReflection(BuildProducer<ReflectiveClassBuildItem> reflectiveClass) {
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, CJCommunicationsException.class.getName()));
    reflectiveClass
            .produce(new ReflectiveClassBuildItem(false, false, CJConnectionFeatureNotAvailableException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, CJOperationNotSupportedException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, CJTimeoutException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, CJPacketTooBigException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, CJException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, AssertionFailedException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, CJOperationNotSupportedException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, ClosedOnExpiredPasswordException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, ConnectionIsClosedException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, DataConversionException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, DataReadException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, DataTruncationException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, DeadlockTimeoutRollbackMarker.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, FeatureNotAvailableException.class.getName()));
    reflectiveClass
            .produce(new ReflectiveClassBuildItem(false, false, InvalidConnectionAttributeException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, NumberOutOfRange.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, OperationCancelledException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, PasswordExpiredException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, PropertyNotModifiableException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, RSAException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, SSLParamsException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, StatementIsClosedException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, StreamingNotifiable.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, UnableToConnectException.class.getName()));
    reflectiveClass
            .produce(new ReflectiveClassBuildItem(false, false, UnsupportedConnectionStringException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, WrongArgumentException.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(true, true, "com.mysql.cj.jdbc.MysqlXAException"));
    reflectiveClass
            .produce(new ReflectiveClassBuildItem(false, false, StandardLoadBalanceExceptionChecker.class.getName()));
    reflectiveClass.produce(new ReflectiveClassBuildItem(false, false, NdbLoadBalanceExceptionChecker.class.getName()));
}
 
Example 6
Source Project: lams   Source File: NonRegisteringDriver.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Try to make a database connection to the given URL. The driver should return "null" if it realizes it is the wrong kind of driver to connect to the given
 * URL. This will be common, as when the JDBC driverManager is asked to connect to a given URL, it passes the URL to each loaded driver in turn.
 * 
 * <p>
 * The driver should raise an SQLException if the URL is null or if it is the right driver to connect to the given URL, but has trouble connecting to the
 * database.
 * </p>
 * 
 * <p>
 * The java.util.Properties argument can be used to pass arbitrary string tag/value pairs as connection arguments. These properties take precedence over any
 * properties sent in the URL.
 * </p>
 * 
 * <p>
 * MySQL protocol takes the form:
 * 
 * <PRE>
 * jdbc:mysql://host:port/database
 * </PRE>
 * 
 * </p>
 * 
 * @param url
 *            the URL of the database to connect to
 * @param info
 *            a list of arbitrary tag/value pairs as connection arguments
 * 
 * @return a connection to the URL or null if it isn't us
 * 
 * @exception SQLException
 *                if a database access error occurs or the url is {@code null}
 * 
 * @see java.sql.Driver#connect
 */
public java.sql.Connection connect(String url, Properties info) throws SQLException {

    try {
        ConnectionUrl conStr = ConnectionUrl.getConnectionUrlInstance(url, info);
        if (conStr.getType() == null) {
            /*
             * According to JDBC spec:
             * The driver should return "null" if it realizes it is the wrong kind of driver to connect to the given URL. This will be common, as when the
             * JDBC driver manager is asked to connect to a given URL it passes the URL to each loaded driver in turn.
             */
            return null;
        }

        switch (conStr.getType()) {
            case LOADBALANCE_CONNECTION:
                return LoadBalancedConnectionProxy.createProxyInstance((LoadbalanceConnectionUrl) conStr);

            case FAILOVER_CONNECTION:
                return FailoverConnectionProxy.createProxyInstance(conStr);

            case REPLICATION_CONNECTION:
                return ReplicationConnectionProxy.createProxyInstance((ReplicationConnectionUrl) conStr);

            case XDEVAPI_SESSION:
                // TODO test it
                //return new XJdbcConnection(conStr.getProperties());

            default:
                return com.mysql.cj.jdbc.ConnectionImpl.getInstance(conStr.getMainHost());

        }

    } catch (CJException ex) {
        throw ExceptionFactory.createException(UnableToConnectException.class,
                Messages.getString("NonRegisteringDriver.17", new Object[] { ex.toString() }), ex);
    }
}
 
Example 7
Source Project: lams   Source File: SQLExceptionsMapping.java    License: GNU General Public License v2.0 4 votes vote down vote up
public static SQLException translateException(Throwable ex, ExceptionInterceptor interceptor) {
    if (ex instanceof SQLException) {
        return (SQLException) ex;

    } else if (ex.getCause() != null && ex.getCause() instanceof SQLException) {
        return (SQLException) ex.getCause();

    } else if (ex instanceof CJCommunicationsException) {
        return SQLError.createCommunicationsException(ex.getMessage(), ex, interceptor);

    } else if (ex instanceof CJConnectionFeatureNotAvailableException) {
        return new ConnectionFeatureNotAvailableException(ex.getMessage(), ex);

    } else if (ex instanceof SSLParamsException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_BAD_SSL_PARAMS, 0, false, ex, interceptor);

    } else if (ex instanceof ConnectionIsClosedException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_CONNECTION_NOT_OPEN, ex, interceptor);

    } else if (ex instanceof InvalidConnectionAttributeException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_INVALID_CONNECTION_ATTRIBUTE, ex, interceptor);

    } else if (ex instanceof UnableToConnectException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_UNABLE_TO_CONNECT_TO_DATASOURCE, ex, interceptor);

    } else if (ex instanceof StatementIsClosedException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, ex, interceptor);

    } else if (ex instanceof WrongArgumentException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, ex, interceptor);

    } else if (ex instanceof StringIndexOutOfBoundsException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, ex, interceptor);

    } else if (ex instanceof NumberOutOfRange) {
        // must come before DataReadException as it's more specific
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_NUMERIC_VALUE_OUT_OF_RANGE, ex, interceptor);

    } else if (ex instanceof DataConversionException) {
        // must come before DataReadException as it's more specific
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_INVALID_CHARACTER_VALUE_FOR_CAST, ex, interceptor);

    } else if (ex instanceof DataReadException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, ex, interceptor);

    } else if (ex instanceof DataTruncationException) {
        return new MysqlDataTruncation(((DataTruncationException) ex).getMessage(), ((DataTruncationException) ex).getIndex(),
                ((DataTruncationException) ex).isParameter(), ((DataTruncationException) ex).isRead(), ((DataTruncationException) ex).getDataSize(),
                ((DataTruncationException) ex).getTransferSize(), ((DataTruncationException) ex).getVendorCode());

    } else if (ex instanceof CJPacketTooBigException) {
        return new PacketTooBigException(ex.getMessage());

    } else if (ex instanceof OperationCancelledException) {
        return new MySQLStatementCancelledException(ex.getMessage());

    } else if (ex instanceof CJTimeoutException) {
        return new MySQLTimeoutException(ex.getMessage());

    } else if (ex instanceof CJOperationNotSupportedException) {
        return new OperationNotSupportedException(ex.getMessage());

    } else if (ex instanceof UnsupportedOperationException) {
        return new OperationNotSupportedException(ex.getMessage());

    } else if (ex instanceof CJException) {
        return SQLError.createSQLException(ex.getMessage(), ((CJException) ex).getSQLState(), ((CJException) ex).getVendorCode(),
                ((CJException) ex).isTransient(), interceptor);

    } else {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_GENERAL_ERROR, ex, interceptor);
    }
}
 
Example 8
Source Project: lams   Source File: ConnectionImpl.java    License: GNU General Public License v2.0 4 votes vote down vote up
private void connectOneTryOnly(boolean isForReconnect) throws SQLException {
    Exception connectionNotEstablishedBecause = null;

    try {

        JdbcConnection c = getProxy();
        this.session.connect(this.origHostInfo, this.user, this.password, this.database, DriverManager.getLoginTimeout() * 1000, c);

        // save state from old connection
        boolean oldAutoCommit = getAutoCommit();
        int oldIsolationLevel = this.isolationLevel;
        boolean oldReadOnly = isReadOnly(false);
        String oldCatalog = getCatalog();

        this.session.setQueryInterceptors(this.queryInterceptors);

        // Server properties might be different from previous connection, so initialize again...
        initializePropsFromServer();

        if (isForReconnect) {
            // Restore state from old connection
            setAutoCommit(oldAutoCommit);
            setTransactionIsolation(oldIsolationLevel);
            setCatalog(oldCatalog);
            setReadOnly(oldReadOnly);
        }
        return;

    } catch (UnableToConnectException rejEx) {
        close();
        this.session.getProtocol().getSocketConnection().forceClose();
        throw rejEx;

    } catch (Exception EEE) {

        if ((EEE instanceof PasswordExpiredException
                || EEE instanceof SQLException && ((SQLException) EEE).getErrorCode() == MysqlErrorNumbers.ER_MUST_CHANGE_PASSWORD)
                && !this.disconnectOnExpiredPasswords.getValue()) {
            return;
        }

        if (this.session != null) {
            this.session.forceClose();
        }

        connectionNotEstablishedBecause = EEE;

        if (EEE instanceof SQLException) {
            throw (SQLException) EEE;
        }

        if (EEE.getCause() != null && EEE.getCause() instanceof SQLException) {
            throw (SQLException) EEE.getCause();
        }

        if (EEE instanceof CJException) {
            throw (CJException) EEE;
        }

        SQLException chainedEx = SQLError.createSQLException(Messages.getString("Connection.UnableToConnect"),
                MysqlErrorNumbers.SQL_STATE_UNABLE_TO_CONNECT_TO_DATASOURCE, getExceptionInterceptor());
        chainedEx.initCause(connectionNotEstablishedBecause);

        throw chainedEx;
    }
}
 
Example 9
public static SQLException translateException(Throwable ex, ExceptionInterceptor interceptor) {
    if (ex instanceof SQLException) {
        return (SQLException) ex;

    } else if (ex.getCause() != null && ex.getCause() instanceof SQLException) {
        return (SQLException) ex.getCause();

    } else if (ex instanceof CJCommunicationsException) {
        return SQLError.createCommunicationsException(ex.getMessage(), ex, interceptor);

    } else if (ex instanceof CJConnectionFeatureNotAvailableException) {
        return new ConnectionFeatureNotAvailableException(ex.getMessage(), ex);

    } else if (ex instanceof SSLParamsException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_BAD_SSL_PARAMS, 0, false, ex, interceptor);

    } else if (ex instanceof ConnectionIsClosedException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_CONNECTION_NOT_OPEN, ex, interceptor);

    } else if (ex instanceof InvalidConnectionAttributeException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_INVALID_CONNECTION_ATTRIBUTE, ex, interceptor);

    } else if (ex instanceof UnableToConnectException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_UNABLE_TO_CONNECT_TO_DATASOURCE, ex, interceptor);

    } else if (ex instanceof StatementIsClosedException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, ex, interceptor);

    } else if (ex instanceof WrongArgumentException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, ex, interceptor);

    } else if (ex instanceof StringIndexOutOfBoundsException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, ex, interceptor);

    } else if (ex instanceof NumberOutOfRange) {
        // must come before DataReadException as it's more specific
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_NUMERIC_VALUE_OUT_OF_RANGE, ex, interceptor);

    } else if (ex instanceof DataConversionException) {
        // must come before DataReadException as it's more specific
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_INVALID_CHARACTER_VALUE_FOR_CAST, ex, interceptor);

    } else if (ex instanceof DataReadException) {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, ex, interceptor);

    } else if (ex instanceof DataTruncationException) {
        return new MysqlDataTruncation(((DataTruncationException) ex).getMessage(), ((DataTruncationException) ex).getIndex(),
                ((DataTruncationException) ex).isParameter(), ((DataTruncationException) ex).isRead(), ((DataTruncationException) ex).getDataSize(),
                ((DataTruncationException) ex).getTransferSize(), ((DataTruncationException) ex).getVendorCode());

    } else if (ex instanceof CJPacketTooBigException) {
        return new PacketTooBigException(ex.getMessage());

    } else if (ex instanceof OperationCancelledException) {
        return new MySQLStatementCancelledException(ex.getMessage());

    } else if (ex instanceof CJTimeoutException) {
        return new MySQLTimeoutException(ex.getMessage());

    } else if (ex instanceof CJOperationNotSupportedException) {
        return new OperationNotSupportedException(ex.getMessage());

    } else if (ex instanceof UnsupportedOperationException) {
        return new OperationNotSupportedException(ex.getMessage());

    } else if (ex instanceof CJException) {
        return SQLError.createSQLException(ex.getMessage(), ((CJException) ex).getSQLState(), ((CJException) ex).getVendorCode(),
                ((CJException) ex).isTransient(), interceptor);

    } else {
        return SQLError.createSQLException(ex.getMessage(), MysqlErrorNumbers.SQL_STATE_GENERAL_ERROR, ex, interceptor);
    }
}
 
Example 10
Source Project: FoxTelem   Source File: ConnectionImpl.java    License: GNU General Public License v3.0 4 votes vote down vote up
private void connectOneTryOnly(boolean isForReconnect) throws SQLException {
    Exception connectionNotEstablishedBecause = null;

    try {

        JdbcConnection c = getProxy();
        this.session.connect(this.origHostInfo, this.user, this.password, this.database, DriverManager.getLoginTimeout() * 1000, c);

        // save state from old connection
        boolean oldAutoCommit = getAutoCommit();
        int oldIsolationLevel = this.isolationLevel;
        boolean oldReadOnly = isReadOnly(false);
        String oldCatalog = getCatalog();

        this.session.setQueryInterceptors(this.queryInterceptors);

        // Server properties might be different from previous connection, so initialize again...
        initializePropsFromServer();

        if (isForReconnect) {
            // Restore state from old connection
            setAutoCommit(oldAutoCommit);
            setTransactionIsolation(oldIsolationLevel);
            setCatalog(oldCatalog);
            setReadOnly(oldReadOnly);
        }
        return;

    } catch (UnableToConnectException rejEx) {
        close();
        this.session.getProtocol().getSocketConnection().forceClose();
        throw rejEx;

    } catch (Exception EEE) {

        if ((EEE instanceof PasswordExpiredException
                || EEE instanceof SQLException && ((SQLException) EEE).getErrorCode() == MysqlErrorNumbers.ER_MUST_CHANGE_PASSWORD)
                && !this.disconnectOnExpiredPasswords.getValue()) {
            return;
        }

        if (this.session != null) {
            this.session.forceClose();
        }

        connectionNotEstablishedBecause = EEE;

        if (EEE instanceof SQLException) {
            throw (SQLException) EEE;
        }

        if (EEE.getCause() != null && EEE.getCause() instanceof SQLException) {
            throw (SQLException) EEE.getCause();
        }

        if (EEE instanceof CJException) {
            throw (CJException) EEE;
        }

        SQLException chainedEx = SQLError.createSQLException(Messages.getString("Connection.UnableToConnect"),
                MysqlErrorNumbers.SQL_STATE_UNABLE_TO_CONNECT_TO_DATASOURCE, getExceptionInterceptor());
        chainedEx.initCause(connectionNotEstablishedBecause);

        throw chainedEx;
    }
}
 
Example 11
/**
 * Try to make a database connection to the given URL. The driver should return "null" if it realizes it is the wrong kind of driver to connect to the given
 * URL. This will be common, as when the JDBC driverManager is asked to connect to a given URL, it passes the URL to each loaded driver in turn.
 * 
 * <p>
 * The driver should raise an SQLException if the URL is null or if it is the right driver to connect to the given URL, but has trouble connecting to the
 * database.
 * </p>
 * 
 * <p>
 * The java.util.Properties argument can be used to pass arbitrary string tag/value pairs as connection arguments. These properties take precedence over any
 * properties sent in the URL.
 * </p>
 * 
 * <p>
 * MySQL protocol takes the form: jdbc:mysql://host:port/database
 * </p>
 * 
 * @param url
 *            the URL of the database to connect to
 * @param info
 *            a list of arbitrary tag/value pairs as connection arguments
 * 
 * @return a connection to the URL or null if it isn't us
 * 
 * @exception SQLException
 *                if a database access error occurs or the url is {@code null}
 */
@Override
public java.sql.Connection connect(String url, Properties info) throws SQLException {

    try {
        if (!ConnectionUrl.acceptsUrl(url)) {
            /*
             * According to JDBC spec:
             * The driver should return "null" if it realizes it is the wrong kind of driver to connect to the given URL. This will be common, as when the
             * JDBC driver manager is asked to connect to a given URL it passes the URL to each loaded driver in turn.
             */
            return null;
        }

        ConnectionUrl conStr = ConnectionUrl.getConnectionUrlInstance(url, info);
        switch (conStr.getType()) {
            case SINGLE_CONNECTION:
                return com.mysql.cj.jdbc.ConnectionImpl.getInstance(conStr.getMainHost());

            case LOADBALANCE_CONNECTION:
                return LoadBalancedConnectionProxy.createProxyInstance((LoadbalanceConnectionUrl) conStr);

            case FAILOVER_CONNECTION:
                return FailoverConnectionProxy.createProxyInstance(conStr);

            case REPLICATION_CONNECTION:
                return ReplicationConnectionProxy.createProxyInstance((ReplicationConnectionUrl) conStr);

            default:
                return null;
        }

    } catch (UnsupportedConnectionStringException e) {
        // when Connector/J can't handle this connection string the Driver must return null
        return null;

    } catch (CJException ex) {
        throw ExceptionFactory.createException(UnableToConnectException.class,
                Messages.getString("NonRegisteringDriver.17", new Object[] { ex.toString() }), ex);
    }
}