Java tutorial
/** * Copyright (C) 2009 * by 52 North Initiative for Geospatial Open Source Software GmbH * * Contact: Andreas Wytzisk * 52 North Initiative for Geospatial Open Source Software GmbH * Martin-Luther-King-Weg 24 * 48155 Muenster, Germany * info@52north.org * * This program is free software; you can redistribute and/or modify it under * the terms of the GNU General Public License version 2 as published by the * Free Software Foundation. * * This program is distributed WITHOUT ANY WARRANTY; even without the implied * WARRANTY OF MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along with * this program (see gnu-gpl v2.txt). If not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA or * visit the Free Software Foundation web page, http://www.fsf.org. */ package org.n52.ifgicopter.spf.input; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.InputStream; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Random; import javax.swing.JButton; import javax.swing.JLabel; import javax.swing.JPanel; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.n52.ifgicopter.spf.common.IModule; import org.n52.ifgicopter.spf.gui.ModuleGUI; import org.n52.ifgicopter.spf.input.IInputPlugin; /** * Simple test class. * * @author Matthes Rieke <m.rieke@uni-muenster.de> * */ public class DummyInputPlugin implements IInputPlugin { protected static final Log log = LogFactory.getLog(DummyInputPlugin.class); private static final long THREAD_SLEEP_TIME_MASTER_WHILE_LOOP = 100; /* * seconds the loop will run */ protected static final int LOOP_SEC = 500; /* * set this to true to autostart the plugin */ protected boolean running = false; private List<Map<String, Object>> dataBuffer = new ArrayList<Map<String, Object>>(); int status = IModule.STATUS_RUNNING; private ModuleGUI gui; protected boolean initialized = false; protected long sleeptime = 500; public DummyInputPlugin() { // TODO Auto-generated constructor stub } /* * (non-Javadoc) * * @see org.n52.ifgicopter.spf.input.IInputPlugin#getConfigFile() */ @Override public InputStream getConfigFile() { try { return new FileInputStream(new File("config/spf/input-ifgicopter.xml")); } catch (FileNotFoundException e) { log.error(e); } return null; } @Override public void init() throws Exception { this.gui = new ModuleGUI(); JPanel panel = new JPanel(new FlowLayout()); JLabel label = new JLabel("<html><h1>Dummy InputPlugin</h1><p>Running time: " + LOOP_SEC + " seconds with a new value interval of " + this.sleeptime + " milliseconds.</p><p></p><p>Once started, you cannot stop it.</p></html>"); panel.add(label); final JButton startbut = new JButton("Start"); startbut.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { start(); startbut.setEnabled(false); } }); panel.add(startbut); this.gui.setGui(panel); new Thread(new Runnable() { @Override public void run() { while (!DummyInputPlugin.this.initialized) { try { Thread.sleep(THREAD_SLEEP_TIME_MASTER_WHILE_LOOP); } catch (InterruptedException e) { e.printStackTrace(); } } try { while (true) { if (DummyInputPlugin.this.running) { innerRun(); } else { try { Thread.sleep(THREAD_SLEEP_TIME_MASTER_WHILE_LOOP); } catch (InterruptedException e) { e.printStackTrace(); } } } } catch (Exception e) { log.error("error in run()", e); } } private void innerRun() { double altDelta = 0.5; int humicount = 0; Random rand = new Random(); Map<String, Object> posData = null; Map<String, Object> sensorData = null; long start = System.currentTimeMillis(); posData = new HashMap<String, Object>(); /* * do loop of LOOP_SEC seconds */ log.debug("starting time series for " + LOOP_SEC + " seconds."); while (System.currentTimeMillis() - start < LOOP_SEC * 1000) { posData.put("time", Long.valueOf(System.currentTimeMillis())); posData.put("latitude", Double.valueOf(52.0 + rand.nextDouble() * 0.0025)); posData.put("longitude", Double.valueOf(7.0 + rand.nextDouble() * 0.0025)); posData.put("altitude", Double.valueOf((altDelta * humicount) + 34.0 + rand.nextDouble() * 7)); DummyInputPlugin.this.populateNewData(posData); try { Thread.sleep(500); } catch (InterruptedException e) { log.error(e); } /* * now with humidity */ sensorData = new HashMap<String, Object>(); sensorData.put("time", Long.valueOf(System.currentTimeMillis())); sensorData.put("humidity", Double.valueOf(70.2 + (rand.nextInt(200) / 10.0))); sensorData.put("humiditay", Double.valueOf(70.2 + (rand.nextInt(200) / 10.0))); sensorData.put("temperature", Double.valueOf(20.0 + (rand.nextInt(40) / 10.0))); humicount++; DummyInputPlugin.this.populateNewData(sensorData); try { Thread.sleep(DummyInputPlugin.this.sleeptime); } catch (InterruptedException e) { log.error(e); } } try { Thread.sleep(500); } catch (InterruptedException e) { log.error(e); } posData.put("time", Long.valueOf(System.currentTimeMillis())); DummyInputPlugin.this.populateNewData(posData); log.info("humicount=" + humicount); // just one run! stop(); } }).start(); this.initialized = true; } /** * */ public void start() { this.running = true; log.info("start"); } /** * */ public void stop() { this.running = false; this.status = IModule.STATUS_NOT_RUNNING; log.info("stop"); } @Override public void shutdown() throws Exception { this.running = false; } protected synchronized void populateNewData(Map<String, Object> data) { this.dataBuffer.add(data); } @Override public synchronized boolean hasNewData() { return !this.dataBuffer.isEmpty(); } @Override public synchronized List<Map<String, Object>> getNewData() { ArrayList<Map<String, Object>> result = new ArrayList<Map<String, Object>>(this.dataBuffer); this.dataBuffer.clear(); log.debug(result); return result; } @Override public int getStatus() { return this.status; } @Override public String getStatusString() { if (this.status == IModule.STATUS_RUNNING) { return "everything fine"; } return "stopped..."; } @Override public String getName() { return "Dummy InputPlugin"; } @Override public ModuleGUI getUserInterface() { return this.gui; } }