/**
* Copyright (c) 2011-2014, OpenIoT
*
* This file is part of OpenIoT.
*
* OpenIoT is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* OpenIoT 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenIoT. If not, see <http://www.gnu.org/licenses/>.
*
* Contact: OpenIoT mailto: info@openiot.eu
* @author Mehdi Riahi
* @author Ali Salehi
*/
package org.openiot.gsn.wrappers;
import org.openiot.gsn.beans.AddressBean;
import org.openiot.gsn.beans.DataField;
import org.openiot.gsn.beans.DataTypes;
import org.openiot.gsn.beans.StreamElement;
import org.openiot.gsn.utils.ParamParser;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.log4j.Logger;
public class GPSGenerator extends AbstractWrapper {
private static final int DEFAULT_SAMPLING_RATE = 1000;
private static final String [ ] FIELD_NAMES = new String [ ] { "latitude" , "longitude" , "temperature" , "light" , "camera" };
private static final Byte [ ] FIELD_TYPES = new Byte [ ] { DataTypes.DOUBLE , DataTypes.DOUBLE , DataTypes.DOUBLE , DataTypes.INTEGER , DataTypes.BINARY };
private static final String [ ] FIELD_DESCRIPTION = new String [ ] { "Latitude Reading" , "Longitude Reading" , "Temperature Sensor" , "Light Sensor" , "Camera Picture" };
private static final String [ ] FIELD_TYPES_STRING = new String [ ] { "double" , "double" , "double" , "int" , "binary:jpeg" };
private int samplingRate = DEFAULT_SAMPLING_RATE;
private final transient Logger logger = Logger.getLogger( GPSGenerator.class );
private static int threadCounter = 0;
private byte [ ] picture;
private DataField[] outputStrcture ;
public DataField [] getOutputFormat ( ) {
return outputStrcture;
}
public boolean initialize ( ) {
setName( "GPSGenerator-Thread" + ( ++threadCounter ) );
AddressBean addressBean = getActiveAddressBean( );
if ( addressBean.getPredicateValue( "rate" ) != null ) {
samplingRate = ParamParser.getInteger( addressBean.getPredicateValue( "rate" ) , DEFAULT_SAMPLING_RATE );
if ( samplingRate <= 0 ) {
logger.warn( "The specified >sampling-rate< parameter for the >MemoryMonitoringWrapper< should be a positive number.\nGSN uses the default rate (" + DEFAULT_SAMPLING_RATE + "ms )." );
samplingRate = DEFAULT_SAMPLING_RATE;
}
}
if ( addressBean.getPredicateValue( "picture" ) != null ) {
String picture = addressBean.getPredicateValue( "picture" );
File pictureF = new File( picture );
if ( !pictureF.isFile( ) || !pictureF.canRead( ) ) {
logger.warn( "The GPSGenerator can't access the specified picture file. Initialization failed." );
return false;
}
try {
BufferedInputStream fis = new BufferedInputStream( new FileInputStream( pictureF ) );
ByteArrayOutputStream outputStream = new ByteArrayOutputStream( );
byte [ ] buffer = new byte [ 4 * 1024 ];
while ( fis.available( ) > 0 )
outputStream.write( buffer , 0 , fis.read( buffer ) );
fis.close( );
this.picture = outputStream.toByteArray( );
outputStream.close( );
} catch ( FileNotFoundException e ) {
logger.warn( e.getMessage( ) , e );
return false;
} catch ( IOException e ) {
logger.warn( e.getMessage( ) , e );
return false;
}
} else {
logger.warn( "The >picture< parameter is missing from the GPSGenerator wrapper." );
return false;
}
ArrayList<DataField > output = new ArrayList < DataField >();
for ( int i = 0 ; i < FIELD_NAMES.length ; i++ )
output.add( new DataField( FIELD_NAMES[ i ] , FIELD_TYPES_STRING[ i ] , FIELD_DESCRIPTION[ i ] ) );
outputStrcture = output.toArray( new DataField[] {} );
return true;
}
private static int step = 1;
public void run ( ) {
while ( isActive( ) ) {
double latitude = 37.4419+.01* (step++);
double longitude = -122.1419;
try {
Thread.sleep( samplingRate );
} catch ( InterruptedException e ) {
logger.error( e.getMessage( ) , e );
}
StreamElement streamElement = new StreamElement( FIELD_NAMES , FIELD_TYPES , new Serializable [ ] { latitude , longitude , 25.5 , 650 , picture } );
postStreamElement( streamElement );
}
}
public void dispose ( ) {
threadCounter--;
}
public String getWrapperName() {
return "GPS Generator";
}
}