Java tutorial
/* * * * RHQ Management Platform * * Copyright (C) 2005-2012 Red Hat, Inc. * * All rights reserved. * * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License, version 2, as * * published by the Free Software Foundation, and/or the GNU Lesser * * General Public License, version 2.1, also as published by the Free * * Software Foundation. * * * * This program 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 General Public License and the GNU Lesser General Public License * * for more details. * * * * You should have received a copy of the GNU General Public License * * and the GNU Lesser General Public License along with this program; * * if not, write to the Free Software Foundation, Inc., * * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * */ package org.rhq.metrics.simulator.plan; import java.io.File; import java.net.InetAddress; import com.fasterxml.jackson.core.JsonFactory; import com.fasterxml.jackson.core.JsonParser.Feature; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import org.joda.time.Minutes; import org.joda.time.Seconds; import org.rhq.metrics.simulator.MinutesDateTimeService; import org.rhq.metrics.simulator.SecondsDateTimeService; import org.rhq.metrics.simulator.SimulatedDateTimeService; import org.rhq.metrics.simulator.plan.SimulationPlan.SimulationType; import org.rhq.server.metrics.DateTimeService; import org.rhq.server.metrics.MetricsConfiguration; /** * @author John Sanda */ public class SimulationPlanner { public SimulationPlan create(File jsonFile) throws Exception { JsonFactory jsonFactory = new JsonFactory(); jsonFactory.enable(Feature.ALLOW_COMMENTS); ObjectMapper mapper = new ObjectMapper(jsonFactory); JsonNode root = mapper.readTree(jsonFile); SimulationPlan simulation = new SimulationPlan(); simulation.setIntervalType( SimulationPlan.IntervalType.fromText(getString(root.get("intervalType"), "minutes"))); DateTimeService dateTimeService; switch (simulation.getIntervalType()) { case SECONDS: simulation.setCollectionInterval(getLong(root.get("collectionInterval"), 20L)); simulation.setAggregationInterval(getLong(root.get("aggregationInterval"), 2500L)); simulation.setMetricsServerConfiguration(createSecondsConfiguration()); simulation.setMetricsReportInterval(getInt(root.get("metricsReportInterval"), 30)); simulation.setSimulationRate(1440); dateTimeService = new SecondsDateTimeService(); break; case MINUTES: simulation.setCollectionInterval(getLong(root.get("collectionInterval"), 1250L)); simulation.setAggregationInterval(getLong(root.get("aggregationInterval"), 150000L)); simulation.setMetricsServerConfiguration(createMinutesConfiguration()); simulation.setMetricsReportInterval(getInt(root.get("metricsReportInterval"), 180)); simulation.setDateTimeService(new MinutesDateTimeService()); simulation.setSimulationRate(2400); dateTimeService = new MinutesDateTimeService(); break; default: // HOURS simulation.setCollectionInterval(getLong(root.get("collectionInterval"), 30000L)); simulation.setAggregationInterval(3600000L); simulation.setMetricsServerConfiguration(new MetricsConfiguration()); simulation.setMetricsReportInterval(getInt(root.get("metricsReportInterval"), 1200)); simulation.setSimulationRate(1000); dateTimeService = new DateTimeService(); } simulation.setSimulationType( SimulationPlan.SimulationType.fromText(getString(root.get("simulationType"), "threaded"))); if (SimulationType.SEQUENTIAL.equals(simulation.getSimulationType())) { dateTimeService = new SimulatedDateTimeService(); } dateTimeService.setConfiguration(simulation.getMetricsServerConfiguration()); simulation.setDateTimeService(dateTimeService); simulation.setNumMeasurementCollectors(getInt(root.get("numMeasurementCollectors"), 5)); simulation.setNumReaders(getInt(root.get("numReaders"), 1)); simulation.setReaderThreadPoolSize(getInt(root.get("readerThreadPoolSize"), 1)); simulation.setSimulationTime(getInt(root.get("simulationTime"), 10)); simulation.setBatchSize(getInt(root.get("batchSize"), 5000)); String[] nodes; if (root.get("nodes") == null || root.get("nodes").size() == 0) { nodes = new String[] { InetAddress.getLocalHost().getHostAddress() }; } else { nodes = new String[root.get("nodes").size()]; int i = 0; for (JsonNode node : root.get("nodes")) { nodes[i++] = node.asText(); } } simulation.setNodes(nodes); simulation.setCqlPort(getInt(root.get("cqlPort"), 9142)); simulation.setAggregationBatchSize(getInt(root.get("aggregationBatchSize"), 250)); simulation.setAggregationType( SimulationPlan.AggregationType.fromText(getString(root.get("aggregationType"), "sync"))); simulation.setAggregationEnabled(getBoolean(root.get("aggregationEnabled"), true)); return simulation; } private MetricsConfiguration createMinutesConfiguration() { MetricsConfiguration configuration = new MetricsConfiguration(); configuration.setRawTTL(Minutes.minutes(168).toStandardSeconds().getSeconds()); configuration.setRawRetention(Minutes.minutes(168).toStandardDuration()); configuration.setRawTimeSliceDuration(Seconds.seconds(150).toStandardDuration()); configuration.setOneHourTTL(Minutes.minutes(336).toStandardSeconds().getSeconds()); configuration.setOneHourRetention(Minutes.minutes(336)); configuration.setOneHourTimeSliceDuration(Minutes.minutes(15).toStandardDuration()); configuration.setSixHourTTL(Minutes.minutes(744).toStandardSeconds().getSeconds()); configuration.setSixHourRetention(Minutes.minutes(744).toStandardSeconds()); configuration.setSixHourTimeSliceDuration(Minutes.minutes(60).toStandardDuration()); configuration.setTwentyFourHourTTL(Minutes.minutes(8928).toStandardSeconds().getSeconds()); configuration.setTwentyFourHourRetention(Minutes.minutes(8928).toStandardSeconds()); return configuration; } private MetricsConfiguration createSecondsConfiguration() { MetricsConfiguration configuration = new MetricsConfiguration(); configuration.setRawTTL(420); configuration.setRawRetention(Seconds.seconds(420).toStandardDuration()); configuration.setRawTimeSliceDuration(Seconds.seconds(2).toStandardDuration().plus(500)); configuration.setOneHourTTL(Seconds.seconds(840).getSeconds()); configuration.setOneHourRetention(Seconds.seconds(840)); configuration.setOneHourTimeSliceDuration(Seconds.seconds(15).toStandardDuration()); configuration.setSixHourTTL(Seconds.seconds(1860).getSeconds()); configuration.setSixHourRetention(Seconds.seconds(1860)); configuration.setSixHourTimeSliceDuration(Seconds.seconds(60).toStandardDuration()); configuration.setTwentyFourHourTTL(Minutes.minutes(365).toStandardSeconds().getSeconds()); configuration.setTwentyFourHourRetention(Minutes.minutes(365)); return configuration; } private String getString(JsonNode node, String defaultValue) { if (node == null) { return defaultValue; } return node.asText(); } private long getLong(JsonNode node, long defaultValue) { if (node == null) { return defaultValue; } return node.longValue(); } private int getInt(JsonNode node, int defaultValue) { if (node == null) { return defaultValue; } return node.intValue(); } private boolean getBoolean(JsonNode node, boolean defaultValue) { if (node == null) { return defaultValue; } return node.booleanValue(); } }