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The framework of the SprHibRAD suite - Stefano Pizzocaro - 62

There is a newer version: 1.0.3

/*
	Copyright (c) 2017, Stefano Pizzocaro. All rights reserved. Use is subject to license terms.

	This file is part of SprHibRAD 1.0.

	SprHibRAD 1.0 is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	SprHibRAD 1.0 is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with SprHibRAD 1.0.  If not, see .
*/

package com.sprhibrad.framework.configuration;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.jdbc.CannotGetJdbcConnectionException;
import org.springframework.security.authentication.InternalAuthenticationServiceException;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;
import org.springframework.stereotype.Component;

/**
 *  It gives Spring Security the direction on dbms unavailability. 
 */
@Component
public class ShrAuthenticationFailureHandler extends SimpleUrlAuthenticationFailureHandler {

	public ShrAuthenticationFailureHandler() {
		super();
		setDefaultFailureUrl("/login?error");
	}

	@Override
	public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response,
			AuthenticationException exception) throws IOException, ServletException {
		if (exception instanceof InternalAuthenticationServiceException
				&& ((InternalAuthenticationServiceException) exception)
						.getCause() instanceof CannotGetJdbcConnectionException)
			this.getRedirectStrategy().sendRedirect(request, response, "/login?unavailable");
		else
			super.onAuthenticationFailure(request, response, exception);
	}

}