/**
* Global Sensor Networks (GSN) Source Code
* Copyright (c) 2006-2016, Ecole Polytechnique Federale de Lausanne (EPFL)
*
* This file is part of GSN.
*
* GSN 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 3 of the License, or
* (at your option) any later version.
*
* GSN 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 GSN. If not, see <http://www.gnu.org/licenses/>.
*
* File: src/ch/epfl/gsn/wrappers/xBow/XmlWrapper.java
*
* @author bgpearn
*
*/
package ch.epfl.gsn.wrappers.xBow;
import org.slf4j.LoggerFactory;
import org.slf4j.Logger;
import java.util.ArrayList;
import java.lang.Thread;
import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.*;
import org.xml.sax.SAXException;
import ch.epfl.gsn.Main;
import ch.epfl.gsn.Mappings;
import ch.epfl.gsn.beans.AddressBean;
import ch.epfl.gsn.beans.ContainerConfig;
import ch.epfl.gsn.beans.DataField;
import ch.epfl.gsn.beans.DataTypes;
import ch.epfl.gsn.beans.StreamElement;
import ch.epfl.gsn.beans.StreamSource;
import ch.epfl.gsn.wrappers.AbstractWrapper;
import javax.xml.parsers.ParserConfigurationException;
/**
* The XML wrapper is used to get the XML stream from xServer of xBow sensor network.
* This is a specialized wrapper because the XML packet length should be verified.
* In xBow sensor network, the basic length of a XML packet is char[2840].
*/
/**
* This Lei Shu'w wrapper from http://lei.shu.deri.googlepages.com/xmlwrapper.rar
*/
/*
* The actual xml packet
<?xml version="1.0" ?><MotePacket><ParsedDataElement><Name>amtype</Name><ConvertedValue>11</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>nodeid</Name><ConvertedValue>1156</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>parent</Name><ConvertedValue>0</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>group</Name><ConvertedValue>125</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>socketid</Name><ConvertedValue>51</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>board_id</Name><ConvertedValue>133</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>packet_id</Name><ConvertedValue>134</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>voltage</Name><ConvertedValue>3003</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>humid</Name><ConvertedValue>45</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>humtemp</Name><ConvertedValue>26</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibW0</Name><ConvertedValue>46520</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibW1</Name><ConvertedValue>50839</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibW2</Name><ConvertedValue>43118</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibW3</Name><ConvertedValue>46252</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>prtemp</Name><ConvertedValue>25.852833</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>press</Name><ConvertedValue>992.968689</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>taosch0</Name><ConvertedValue>65518</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>taosch1</Name><ConvertedValue>0</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>accel_x</Name><ConvertedValue>1440.000000</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>accel_y</Name><ConvertedValue>500.000000</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>taoch0</Name><ConvertedValue>883.890015</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibB0</Name><ConvertedValue>184</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibB1</Name><ConvertedValue>181</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibB2</Name><ConvertedValue>151</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibB3</Name><ConvertedValue>198</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibB4</Name><ConvertedValue>110</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibB5</Name><ConvertedValue>168</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibB6</Name><ConvertedValue>172</ConvertedValue></ParsedDataElement><ParsedDataElement><Name>calibB7</Name><ConvertedValue>180</ConvertedValue></ParsedDataElement></MotePacket>
* The parsed fields:
amtype = 11 ;
nodeid = 1156 ;
parent = 0 ;
group = 125 ;
socketid = 51 ;
board_id = 133 ;
packet_id = 134 ;
voltage = 3003 ;
humid = 46 ;
humtemp = 25 ;
calibW0 = 46520 ;
calibW1 = 50839 ;
calibW2 = 43118 ;
calibW3 = 46252 ;
prtemp = 25.596191 ;
press = 993.296448 ;
taosch0 = 65515 ;
taosch1 = 0 ;
accel_x = 1440.000000 ;
accel_y = 500.000000 ;
taoch0 = 796.950012 ;
calibB0 = 184 ;
calibB1 = 181 ;
calibB2 = 151 ;
calibB3 = 198 ;
calibB4 = 110 ;
calibB5 = 168 ;
calibB6 = 172 ;
calibB7 = 180 ;
*/
public class XmlWrapper extends AbstractWrapper {
private int DEFAULT_RATE = 5000;
private static int threadCounter = 0;
private final transient Logger logger = LoggerFactory.getLogger ( XmlWrapper.class );
//private static DataField [] outputStructure = new DataField[] { new DataField( "nodeid" , "INTEGER", "Node ID" ) , new DataField( "parent" , "INTEGER", "Parent Node ID" ) , new DataField( "group" , "INTEGER" , "Group ID" ) , new DataField( "voltage" , "INTEGER" , "Voltage of This Node" ) , new DataField( "humid" , "INTEGER" , "Humidity" ) , new DataField( "humtemp" , "INTEGER" , "Temperature" ) , new DataField( "press" , "DOUBLE" , "Press" ) , new DataField( "accel_x" , "DOUBLE" , "accel_x" ) ,new DataField( "accel_y" ,"DOUBLE" , "accel_y" )};
//private static DataField [] outputStructure = new DataField[] { new DataField( "nodeid" , "INTEGER", "Node ID" ) , new DataField( "humtemp" , "INTEGER", "Parent Node ID" )};
//private static DataField [] outputStructure = new DataField[] { new DataField( "nodeid" , DataTypes.INTEGER_NAME, "Node ID" ) , new DataField( "parent" , DataTypes.INTEGER_NAME, "Parent Node ID" ) , new DataField( "group" , DataTypes.INTEGER_NAME , "Group ID" )};
private static final String [ ] FIELD_NAMES = new String [ ] { "nodeid" , "voltage" , "humid" , "humtemp" , "press" };
private static final Byte [ ] FIELD_TYPES = new Byte [ ] { DataTypes.INTEGER , DataTypes.INTEGER , DataTypes.INTEGER , DataTypes.INTEGER , DataTypes.DOUBLE };
private static final String [ ] FIELD_DESCRIPTION = new String [ ] { "Node ID" , "Voltage of This Node" , "Humidity" , "Temperature" , "Press" };
private static final String [ ] FIELD_TYPES_STRING = new String [ ] { "int" , "int" , "int" , "int" , "double" };
private DataField[] outputStructure ;
private String host ;
private int port ;
private int rate ;
private String inputRate ;
private int times ;
private String inputTimes ;
// fields of sensor node
private int nodeid ;
private int parent ;
private int group ;
private int voltage ;
private int humid ;
private int humtemp ;
private double press ;
private double accel_x ;
private double accel_y ;
// declare the socket object for client side
private Socket xmlSocket = null ;
private BufferedReader rd ;
private StreamElement streamEle ;
private boolean add = false ;
private String s = "" ; // xml packet
private String xmls ;
private DocumentBuilderFactory domfac ;
private DocumentBuilder dombuilder ;
private InputSource ins ;
private Document doc ;
private boolean notEnd = true ;
private int k ;
private String bs ;
private int indexS ;
private int indexE ;
private boolean getxml ;
public boolean initialize ( ) {
/**
* check the host and port parameters.
*/
AddressBean addressBean = getActiveAddressBean( );
host = addressBean.getPredicateValue ( "host" );
if ( host == null || host.trim ( ).length ( ) == 0 ) {
logger.warn ( "The >host< parameter is missing from the RemoteWrapper wrapper." );
return false;
}
port = addressBean.getPredicateValueAsIntWithException("port");
if ( port > 65000 || port <= 0 ) {
logger.error("Remote wrapper initialization failed, bad port number:"+port);
return false;
}
inputRate = addressBean.getPredicateValue( "rate" );
if ( inputRate == null || inputRate.trim( ).length( ) == 0 ) rate = DEFAULT_RATE;
else
rate = Integer.parseInt( inputRate );
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 ] ) );
outputStructure = output.toArray( new DataField[] {} );
return true;
}
public void run ( ) {
// int n=0;
try {
// setup the socket connection
xmlSocket = new Socket(host, port);
rd = new BufferedReader(new InputStreamReader(xmlSocket.getInputStream()));
} catch (IOException e){
logger.warn(" The xml socket connection is not set up.");
logger.warn(" Cannot read from xmlSocket. ");
}
while ( isActive( ) ) {
getxml = false;
// if (xmlSocket.isConnected()){
// logger.info("Socket is connected");
// }
// testing
// n = n + 1 ;
// logger.info("while times n:"+n);
try {
Thread.sleep(rate);
} catch (InterruptedException e) {
logger.error(e.getMessage(),e);
}
try { // try
s = "";
// *** IMPORTANT Factors for getting data ***
// 1) when reading data from buffer, it is already good to read more data.
// For example, the actual length of an XML packet is around 2843, but set the buffer as 3200.
// If two sensor node 2843 * 2, but set the buffer as 6000.
// 2) the sampling rate is another important factor.
// Setting different sampling rate, getting different results.
// ***
char[] c = new char[3000];
// initialize this char[]
for (int j = 0; j < c.length; j++){
c[j] = 0;
}
rd.read(c);
for (int j = 0; j < c.length; j++){
s = s + c[j];
}
//logger.info("S before processing: "+s);
s = s.trim();
//logger.info("S after trim processing: "+s);
//logger.info("s.length: "+ s.length());
if (s != ""){
try{
indexS = s.indexOf("<?xml");
indexE = s.indexOf("</MotePacket>");
//logger.info("original indexS: "+indexS);
//logger.info("original indexE: "+indexE);
}catch (Exception e){
logger.error( e.getMessage( ) , e );
}
if (indexS < indexE) {
if (indexS >= 0){
//logger.info("indexS: "+indexS);
//logger.info("indexE: "+indexE);
bs = s.substring(indexS,(indexE+13) );
//logger.info("bs.length: "+ bs.length());
if (bs.length() > 2000) {
xmls = bs;
getxml = true;
}
if (bs.length() < 2000) {
try{
indexS = s.indexOf("<?xml", indexE);
indexE = s.indexOf("</MotePacket>", indexS);
//logger.info("new indexS: "+indexS);
//logger.info("new indexE: "+indexE);
} catch (Exception e){
logger.error( e.getMessage( ) , e );
}
if (indexS < indexE) {
if (indexS >= 0){
bs = s.substring(indexS,(indexE+13) );
if (bs.length() > 2000) {
xmls = bs;
getxml = true;
}
}
}
}
}
}
}
try { // try 4
//logger.info("S after processing: "+ xmls);
//logger.info("getxml : "+ getxml);
if (getxml){ // if 1
// Create instance of DocumentBuilderFactory
domfac = DocumentBuilderFactory.newInstance();
try { // try 3
// Get the DocumentBuilder
dombuilder = domfac.newDocumentBuilder();
} catch (ParserConfigurationException e){ // try 3
logger.info(e.getMessage( ) , e );
}
try { // try 2
// Create instance of input source
ins = new InputSource();
//logger.info("xmls.length(): "+ xmls.length());
// Initialize this input source as xmls
ins.setCharacterStream(new StringReader(xmls));
//logger.info(ins);
// Pass xmls stream to XML Parser
doc = dombuilder.parse(ins);
} catch (SAXException e){ // try 2
logger.info(e.getMessage( ) , e );
} catch (NullPointerException e){
logger.info(e.getMessage( ) , e );
}
// Get the root element of XML packet
Element root = doc.getDocumentElement();
// Get the first level Node list
NodeList fields = root.getChildNodes();
// Get all fields' name
// start of second layer for 3
for(int i=0;i<fields.getLength();i++){
Element field = (Element)fields.item(i);
String name;
Element nameEle=(Element)field.getElementsByTagName("Name").item(0);
name = nameEle.getTextContent();
String value;
Element valueEle=(Element)field.getElementsByTagName("ConvertedValue").item(0);
value = valueEle.getTextContent();
if (name.equals("nodeid")){
nodeid = Integer.parseInt(value);
}
if (name.equals("parent")){
parent = Integer.parseInt(value);
}
if (name.equals("group")){
group = Integer.parseInt(value);
}
if (name.equals("voltage")){
voltage = Integer.parseInt(value);
}
if (name.equals("humid")){
humid = Integer.parseInt(value);
}
if (name.equals("humtemp")){
humtemp = Integer.parseInt(value);
}
// Double.parseDouble(aString)
if (name.equals("press")){
press = Double.parseDouble(value);
}
if (name.equals("accel_x")){
accel_x = Double.parseDouble(value);
}
if (name.equals("accel_y")){
accel_y = Double.parseDouble(value);
}
} // end of second layer for 3
try { // try 1
streamEle = new StreamElement( FIELD_NAMES , FIELD_TYPES , new Serializable [ ] { nodeid , voltage , humid , humtemp , press } );
postStreamElement (streamEle);
}catch (Exception e){ // try 1
logger.info(e.getMessage( ) , e );
}
// if (isActive( )){
// logger.info("Thread is still active.");}
// if (isActive( ) == false){
// logger.info("Thread is not still active.");
// }
}; // end of if
}catch (Exception e) { // try 4
logger.error( e.getMessage( ) , e );
}
} catch (Exception e) { // try
logger.error( e.getMessage( ) , e );
}
} // while
} // run
// for GSNv2
public void dispose ( ) {
threadCounter--;
}
// for release 1249
public void finalize ( ) {
threadCounter--;
}
public String getWrapperName() {
return "XmlWrapper";
}
public DataField[] getOutputFormat ( ) {
return outputStructure;
}
}