de.highbyte_le.weberknecht.Controller.java Source code

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Here is the source code for de.highbyte_le.weberknecht.Controller.java

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/*
 * Controller.java
 *
 * Copyright 2008-2013 Patrick Mairif.
 * The program is distributed under the terms of the Apache License (ALv2).
 * 
 * tabstop=4, charset=UTF-8
 */
package de.highbyte_le.weberknecht;

import java.io.IOException;
import java.sql.SQLException;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
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.conf.ConfigurationException;
import de.highbyte_le.weberknecht.conf.WeberknechtConf;
import de.highbyte_le.weberknecht.db.DbConnectionHolder;
import de.highbyte_le.weberknecht.db.DbConnectionProvider;
import de.highbyte_le.weberknecht.request.routing.Router;
import de.highbyte_le.weberknecht.request.routing.RoutingTarget;

/**
 * webapp controller implemented as servlet
 * 
 * @author pmairif
 */
@SuppressWarnings({ "nls", "serial" })
public class Controller extends HttpServlet {

    private ControllerCore core;

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

    /**
     * initialization of the controller
     */
    @Override
    public void init() throws ServletException {
        try {
            core = new ControllerCore(getServletContext());
        } catch (Exception e) {
            log.error("init() - Exception: " + e.getMessage(), e);
            throw new ServletException("internal error", e);
        }
    }

    protected void init(ServletContext servletContext, WeberknechtConf conf,
            DbConnectionProvider dbConnectionProvider) throws ClassNotFoundException, ConfigurationException {
        core = new ControllerCore(servletContext, conf, dbConnectionProvider);
    }

    @Override
    public void service(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        if (log.isDebugEnabled())
            log.debug("service() - start");

        long start = System.currentTimeMillis();

        DbConnectionHolder conHolder = new DbConnectionHolder(core.getDbConnectionProvider());
        try {
            Router router = core.createRouter(conHolder); //choose router depending on config
            RoutingTarget routingTarget = router.routeUri(request);

            core.executeAction(request, response, conHolder, routingTarget);
        } catch (Exception e1) {
            try {
                log.error("service() - exception while error handler instantiation: " + e1.getMessage(), e1); //$NON-NLS-1$
                response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); //call error page 500
            } catch (IOException e) {
                log.error("service() - IOException: " + e.getMessage(), e); //$NON-NLS-1$
                response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); //just return 500
            }
        } finally {
            try {
                conHolder.close();
            } catch (SQLException e) {
                log.error("service() - SQLException while closing db connection: " + e.getMessage()); //$NON-NLS-1$
            }
        }

        long finish = System.currentTimeMillis();
        if (log.isInfoEnabled()) {
            log.info("service() - page delivery took " + (finish - start) + " ms");
        }
    }
}