ErrorPage.java

package marubinotto.piggydb.ui.page;

import java.net.SocketException;

import marubinotto.piggydb.ui.page.common.AbstractWebResource;
import marubinotto.piggydb.ui.page.common.Session;
import marubinotto.piggydb.ui.page.common.TemplateUtils;
import marubinotto.util.Assert;
import marubinotto.util.message.CodedException;
import marubinotto.util.message.MessageCode;

import org.apache.commons.lang.exception.ExceptionUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class ErrorPage extends net.sf.click.util.ErrorPage {

	private static Log logger = LogFactory.getLog(ErrorPage.class);

	public TemplateUtils utils = TemplateUtils.INSTANCE;
	
	private String getMessage(MessageCode code) {
		if (code.getArguments() == null) {
			return getMessage(code.getCode());
		}
		else {
			return getMessage(
				code.getCode(), 
				AbstractWebResource.escapeArgs(code.getArguments()));
		}
	}

	@Override
	public boolean onSecurityCheck() {
		Throwable error = getError();
		if (error instanceof CodedException) {
			logger.debug(error.toString(), error);
			String message = getMessage((CodedException)error);
			redirectHomeWithMessage(message);
			return false;
		}
		return true;
	}

	@Override
	public void onInit() {
		super.onInit();
		logError();
	}

	private void logError() {
		Throwable error = getError();

		if (error == null) return;
		if (ExceptionUtils.getRootCause(error) instanceof SocketException) {
			logger.info(error.toString(), error);
			return;
		}

		logger.error("A system error occurred.", getError());
	}

	private void redirectHomeWithMessage(String message) {
		Assert.Arg.notNull(message, "message");
		getContext().setFlashAttribute(Session.SK_MESSAGE, message);
		setRedirect(HomePage.class);
	}
}