com.addc.server.commons.struts12.actions.GlobalExceptionHandler Maven / Gradle / Ivy

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package com.addc.server.commons.struts12.actions;

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

import org.apache.struts.Globals;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ExceptionHandler;
import org.apache.struts.config.ExceptionConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.addc.commons.i18n.I18nTextFactory;
import com.addc.commons.uuid.UUIDGenerator;
import com.addc.server.commons.i18n.ServerI18n;
import com.addc.server.commons.web.i18n.HtmlLabels;

/**
 * The GlobalExceptionHandler would be configured in the struts configuration
 * file in the global mappings to redirect to a generic error page. For these
 * errors it generates a UUID that is displayed in the error page and can be
 * used to locate the stack traces in the log files.
 * 
 */
public class GlobalExceptionHandler extends ExceptionHandler {
    private static final Logger LOGGER= LoggerFactory.getLogger(GlobalExceptionHandler.class);

    @Override
    public ActionForward execute(Exception ex, ExceptionConfig ae, ActionMapping mapping, ActionForm formInstance,
            HttpServletRequest request, HttpServletResponse response) throws ServletException {

        ActionForward forward= mapping.findForward(ActionConstants.UNCHECKED_ERROR);
        String errorCode= UUIDGenerator.getInstance().createUUID();
        LOGGER.error("An uncontrolled error has occurred. Reference: " + errorCode, ex);

        request.setAttribute(Globals.ERROR_KEY, I18nTextFactory.getTranslator(ServerI18n.BASENAME, request.getLocale())
                .translate(HtmlLabels.ERRORS_EXCEPTION, errorCode));
        request.setAttribute(Globals.EXCEPTION_KEY, ex);

        return forward;
    }

}