Java tutorial
/******************************************************************************* * Copyright 2015 Software Evolution and Architecture Lab, University of Zurich * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ package eu.cloudwave.wp5.feedbackhandler.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.HttpStatus; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestHeader; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseStatus; import org.springframework.web.servlet.ModelAndView; import com.google.common.collect.Iterables; import com.google.common.collect.Lists; import eu.cloudwave.wp5.common.constants.Headers; import eu.cloudwave.wp5.common.constants.Params; import eu.cloudwave.wp5.common.constants.Urls; import eu.cloudwave.wp5.common.model.Procedure; import eu.cloudwave.wp5.common.model.ProcedureExecutionMetric; import eu.cloudwave.wp5.common.model.impl.MetricTypeImpl; import eu.cloudwave.wp5.common.model.impl.ProcedureImpl; import eu.cloudwave.wp5.common.util.DateTimes; import eu.cloudwave.wp5.common.util.Splitters; import eu.cloudwave.wp5.feedbackhandler.constants.Attributes; import eu.cloudwave.wp5.feedbackhandler.model.db.DbApplication; import eu.cloudwave.wp5.feedbackhandler.repositories.MetricRepository; @Controller public class PlotController extends AbstractBaseUiController { private static final String DATE_TIME_PATTERN = "yyyy/MM/dd HH:mm:ss"; private static final String TIME_SERIES_PATTERN = "[ new Date('%s'), %s ],"; private static final String OPENING_BRACKET = "["; private static final String CLOSING_BRACKET = "]"; private static final String PROCEDURE_PLOT = "ProcedurePlot"; @Autowired private MetricRepository metricRepository; @RequestMapping(Urls.PLOTS_PROCEDURE) @ResponseStatus(HttpStatus.OK) public ModelAndView procedure( @RequestHeader(value = Headers.ACCESS_TOKEN, required = false) final String accessToken, @RequestHeader(value = Headers.APPLICATION_ID, required = false) final String applicationId, @RequestParam(Params.CLASS_NAME) final String className, @RequestParam(Params.PROCEDURE_NAME) final String procedureName, @RequestParam(Params.ARGUMENTS) final String arguments) { final DbApplication application = handleUnauthorized(applicationId, accessToken); final String[] procedureArguments = Iterables.toArray(Splitters.onComma(arguments), String.class); final List<? extends ProcedureExecutionMetric> metrics = metricRepository.find(application, className, procedureName, procedureArguments); final Procedure procedure = metrics.size() > 0 ? metrics.get(0).getProcedure() : new ProcedureImpl(className, procedureName, null, Lists.newArrayList(procedureArguments), Lists.newArrayList()); final ModelAndView model = new ModelAndView(PROCEDURE_PLOT); final String[] formattedData = formatData(metrics); model.addObject(Attributes.PROCEDURE, procedure); model.addObject(Attributes.DATA_EXECUTION_TIME, formattedData[0]); model.addObject(Attributes.DATA_CPU_USAGE, formattedData[1]); return model; } private String[] formatData(final List<? extends ProcedureExecutionMetric> metrics) { String dataExecTime = OPENING_BRACKET; String dataCpuUsage = OPENING_BRACKET; for (final ProcedureExecutionMetric metric : metrics) { final String formattedStartTime = DateTimes.format(DateTimes.fromMilliSeconds(metric.getTimestamp()), DATE_TIME_PATTERN); if (metric.getType().equals(MetricTypeImpl.EXECUTION_TIME)) { dataExecTime += String.format(TIME_SERIES_PATTERN, formattedStartTime, metric.getValue()); } else if (metric.getType().equals(MetricTypeImpl.CPU_USAGE)) { final double cpuUsage = Double.isNaN((Double) metric.getValue()) ? 0 : (Double) metric.getValue(); dataCpuUsage += String.format(TIME_SERIES_PATTERN, formattedStartTime, cpuUsage); } } dataExecTime += CLOSING_BRACKET; dataCpuUsage += CLOSING_BRACKET; return new String[] { dataExecTime, dataCpuUsage }; } }