Java tutorial
/* =================================================================== * XantrexGtViewPowerDatumDataSource.java * * Created Aug 7, 2008 9:48:26 PM * * Copyright (c) 2008 Solarnetwork.net Dev Team. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * 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 for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307 USA * =================================================================== */ /* ================================================================== * UrlDataCollector.java - Dec 9, 2009 9:46:41 AM * * Copyright 2007-2009 SolarNetwork.net Dev Team * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * 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 for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307 USA * ================================================================== * $Id$ * ================================================================== */ package net.solarnetwork.node.power.impl; import net.solarnetwork.node.DataCollector; import net.solarnetwork.node.DatumDataSource; import net.solarnetwork.node.power.PowerDatum; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.ObjectFactory; /** * Implementation of {@link GenerationDataSource} for the Xantrex series of * inverters, acquiring the data by reading the files written by the freeware * GT-View application. * * <p> * It assumes the {@link DataCollector} implementation blocks until appropriate * data is available when the {@link DataCollector#collectData()} method is * called. * </p> * * <p> * The configurable properties of this class are: * </p> * * <dl class="class-properties"> * <dt>dataCollectorFactory</dt> * <dd>The factory for creating {@link DataCollector} instances with. * {@link GenericObjectFactory#getObject()} will be called on each invocation of * {@link #readCurrentConsumptionDatum()}.</dd> * </dl> * * @author matt, mike * @version 1.2 */ public class XantrexGtViewPowerDatumDataSource implements DatumDataSource<PowerDatum> { private static final int FRAME_IDX_PV_VOLTS = 2; private static final int FRAME_IDX_PV_AMPS = 3; private static final int FRAME_IDX_PV_WATTS = 5; private static final int FRAME_IDX_AC_WATTS = 6; private static final int FRAME_IDX_AC_VOLTS = 8; private static final int FRAME_IDX_WH = 9; private final Logger log = LoggerFactory.getLogger(getClass()); private ObjectFactory<DataCollector> dataCollectorFactory; @Override public String getUID() { return getClass().getName(); } @Override public String getGroupUID() { return null; } @Override public Class<? extends PowerDatum> getDatumType() { return PowerDatum.class; } @Override public PowerDatum readCurrentDatum() { DataCollector dataCollector = null; String data = null; try { dataCollector = this.dataCollectorFactory.getObject(); dataCollector.collectData(); data = dataCollector.getCollectedDataAsString(); } finally { if (dataCollector != null) { dataCollector.stopCollecting(); } } if (data == null) { log.warn("Null serial data received, serial communications problem"); return null; } return getPowerDatumInstance(data); } @SuppressWarnings("deprecation") private PowerDatum getPowerDatumInstance(String data) { if (log.isDebugEnabled()) { log.debug("Raw last sample data in file: " + data); } String[] tokens = data.split("\t"); // only use this if DC watts is non-zero. Some junk is // left over from previous day in other fields Double d = getFrameDouble(tokens, FRAME_IDX_PV_WATTS); if (d == null || d.doubleValue() == 0.0) { return null; } PowerDatum datum = new PowerDatum(); // Field 0: Date: unused // Field 1: Time: unused // Field 2: DC Volts d = getFrameDouble(tokens, FRAME_IDX_PV_VOLTS); if (d != null) { datum.setPvVolts(d.floatValue()); if (log.isDebugEnabled()) { log.debug("DC Volts: " + d); } } // Field 3: DC Amps d = getFrameDouble(tokens, FRAME_IDX_PV_AMPS); if (d != null) { datum.setPvAmps(d.floatValue()); if (log.isDebugEnabled()) { log.debug("DC Amps: " + d); } } // Field 4: MPPT: unused // Field 5: DC Watts: already parsed above // Field 7: Efficiency: unused // Field 8: AC Volts: unused d = getFrameDouble(tokens, FRAME_IDX_AC_VOLTS); if (d != null) { datum.setAcOutputVolts(d.floatValue()); if (log.isDebugEnabled()) { log.debug("AC Volts: " + d); } } // Field 6: AC Watts: used to set AC amps d = getFrameDouble(tokens, FRAME_IDX_AC_WATTS); if (d != null) { if (datum.getAcOutputVolts() > 0) { datum.setAcOutputAmps(d.floatValue() / datum.getAcOutputVolts()); } if (log.isDebugEnabled()) { log.debug("AC Amps: " + d); } } // Field 9: Cumulative AC Watts d = getFrameDouble(tokens, FRAME_IDX_WH); if (d != null) { // store Wh as kWh datum.setKWattHoursToday(d.doubleValue() / 1000); if (log.isDebugEnabled()) { log.debug("WH: " + d); } } return datum; } private Double getFrameDouble(String[] frame, int idx) { if (frame[idx].length() > 0) { return Double.valueOf(frame[idx]); } return null; } public ObjectFactory<DataCollector> getDataCollectorFactory() { return dataCollectorFactory; } public void setDataCollectorFactory(ObjectFactory<DataCollector> dataCollectorFactory) { this.dataCollectorFactory = dataCollectorFactory; } }