Java tutorial
/******************************************************************************* * This file is part of OpenNMS(R). * * Copyright (C) 2016 The OpenNMS Group, Inc. * OpenNMS(R) is Copyright (C) 1999-2016 The OpenNMS Group, Inc. * * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc. * * OpenNMS(R) is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * OpenNMS(R) is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with OpenNMS(R). If not, see: * http://www.gnu.org/licenses/ * * For more information contact: * OpenNMS(R) Licensing <license@opennms.org> * http://www.opennms.org/ * http://www.opennms.com/ *******************************************************************************/ package org.opennms.web.controller.trend; import java.io.File; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.util.List; import java.util.stream.Collectors; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.bind.JAXB; import org.apache.commons.lang.StringUtils; import org.opennms.core.db.DataSourceFactory; import org.opennms.netmgt.config.trend.TrendAttribute; import org.opennms.netmgt.config.trend.TrendConfiguration; import org.opennms.netmgt.config.trend.TrendDefinition; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.InitializingBean; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.AbstractController; public class TrendBoxController extends AbstractController implements InitializingBean { private static final Logger LOG = LoggerFactory.getLogger(TrendBoxController.class); private final File CONFIG_FILE = new File("etc/trend-configuration.xml"); @Override protected ModelAndView handleRequestInternal(final HttpServletRequest request, final HttpServletResponse response) throws Exception { final ModelAndView modelAndView = new ModelAndView("trend/trend-box"); final List<TrendDefinition> filteredTrendDefinitions = getConfiguration().getTrendDefinitions().stream() .filter(trendDefinition -> trendDefinition.isVisible()).collect(Collectors.toList()); modelAndView.addObject("trendDefinitions", filteredTrendDefinitions); return modelAndView; } public TrendConfiguration getConfiguration() { return JAXB.unmarshal(CONFIG_FILE, TrendConfiguration.class); } @Override public void afterPropertiesSet() { } }