src/main/java/de/uapcore/lightpit/modules/ModuleManagerModule.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 2018 Mike Becker. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 */
package de.uapcore.lightpit.modules;

import de.uapcore.lightpit.*;
import de.uapcore.lightpit.LightPITModule.ELProxy;
import de.uapcore.lightpit.dao.CoreDAOFactory;
import de.uapcore.lightpit.entities.Module;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import java.util.Optional;

/**
 * Entry point for the application.
 */
@LightPITModule(
        bundleBaseName = "localization.modmgmt",
        modulePath = "modmgmt",
        defaultPriority = 21000
)
@WebServlet(
        name = "ModuleManagerModule",
        urlPatterns = "/modmgmt/*"
)
public final class ModuleManagerModule extends AbstractLightPITServlet {
    
    private static final Logger LOG = LoggerFactory.getLogger(ModuleManagerModule.class);
    
    private static final String REQ_ATTR_MODULES = "modules";
    
    
    @RequestMapping(method = HttpMethod.GET)
    public ResponseType handle(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        
        Optional<DataSource> ds = getDatabaseFacade().getDataSource();
        if (ds.isPresent()) {
            try (Connection conn = ds.get().getConnection()) {
                final List<Module> modules = CoreDAOFactory.getModuleDao(getDatabaseFacade().getSQLDialect()).listAll(conn);
                
                final Map<String, LightPITModule> registeredModules = getModuleManager().getRegisteredModules();
                modules.forEach((mod) -> mod.setAnnotatedInfos(ELProxy.convert(registeredModules.get(mod.getClassname()))));
                
                req.setAttribute(REQ_ATTR_MODULES, modules);
                setDynamicFragment(req, "modules");                
                return ResponseType.HTML_FULL;
            } catch (SQLException ex) {
                LOG.error("Unexpected SQL Exception", ex);
                resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
                return ResponseType.NONE;
            }
        } else {
            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            return ResponseType.NONE;
        }
    }
}