de.highbyte_le.weberknecht.request.error.DefaultErrorHandler.java Source code

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Here is the source code for de.highbyte_le.weberknecht.request.error.DefaultErrorHandler.java

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/*
 * DefaultErrorHandler.java (weberknecht)
 *
 * Copyright 2012-2013 Patrick Mairif.
 * The program is distributed under the terms of the Apache License (ALv2).
 *
 * tabstop=4, charset=UTF-8
 */
package de.highbyte_le.weberknecht.request.error;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import de.highbyte_le.weberknecht.Controller;
import de.highbyte_le.weberknecht.db.DBConnectionException;
import de.highbyte_le.weberknecht.request.ContentProcessingException;
import de.highbyte_le.weberknecht.request.actions.ActionExecutionException;
import de.highbyte_le.weberknecht.request.actions.ActionInstantiationException;
import de.highbyte_le.weberknecht.request.actions.ActionNotFoundException;
import de.highbyte_le.weberknecht.request.processing.ProcessingException;
import de.highbyte_le.weberknecht.request.routing.RoutingTarget;

/**
 * error handler used by default
 *
 * @author pmairif
 */
public class DefaultErrorHandler implements ErrorHandler {

    private int statusCode;

    /**
     * Logger for this class
     */
    private final Log log = LogFactory.getLog(Controller.class);

    /* (non-Javadoc)
     * @see de.highbyte_le.weberknecht.request.ErrorHandler#handleException(java.lang.Exception, javax.servlet.http.HttpServletRequest)
     */
    @Override
    public boolean handleException(Exception exception, HttpServletRequest request, RoutingTarget routingTarget) {
        if (exception instanceof ActionNotFoundException) {
            log.warn(
                    "action not found: " + exception.getMessage() + "; request URI was " + request.getRequestURI());
            this.statusCode = HttpServletResponse.SC_NOT_FOUND; //throw 404, if action doesn't exist
        } else if (exception instanceof ContentProcessingException) {
            log.error("doGet() - " + exception.getClass().getSimpleName() + ": " + exception.getMessage(), //$NON-NLS-1$
                    exception);
            this.statusCode = ((ContentProcessingException) exception).getHttpStatusCode();
            //TODO error page with error message or set request attribute to be able to write it on standard error pages 
        } else if (exception instanceof ActionInstantiationException) {
            log.warn("action could not be instantiated: " + exception.getMessage(), exception);
            this.statusCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR; //throw 500, if action could not instantiated
        } else if (exception instanceof ProcessingException) {
            log.error("doGet() - PreProcessingException: " + exception.getMessage(), exception); //$NON-NLS-1$
            this.statusCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR; //throw 500
        } else if (exception instanceof DBConnectionException) {
            log.error("doGet() - DBConnectionException: " + exception.getMessage(), exception); //$NON-NLS-1$
            this.statusCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR; //throw 500
        } else if (exception instanceof ActionExecutionException) {
            log.error("doGet() - ActionExecutionException: " + exception.getMessage(), exception); //$NON-NLS-1$
            this.statusCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR; //throw 500
        } else {
            log.error("doGet() - " + exception.getClass().getSimpleName() + ": " + exception.getMessage(), //$NON-NLS-1$
                    exception);
            this.statusCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR; //throw 500
        }

        return true;
    }

    /* (non-Javadoc)
     * @see de.highbyte_le.weberknecht.request.ErrorHandler#getStatus()
     */
    @Override
    public int getStatus() {
        return statusCode;
    }

    /**
     * @param statusCode the statusCode to set
     */
    protected void setStatusCode(int statusCode) {
        this.statusCode = statusCode;
    }

    /* (non-Javadoc)
     * @see de.highbyte_le.weberknecht.request.view.AutoView#getViewProcessorName()
     */
    @Override
    public String getViewProcessorName() {
        return null; //no view, let the controller use sendError()
    }
}