//Project Webflow
//Leader Tom Haupt
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import WebFlow.*;
import WebFlow.event.*;
import org.omg.CORBA.*;
public class slave1 extends HttpServlet
{
// private String sMasterRef = new String("/home/T11F/webflow/WEBFLOW/JIGSAW/Jigsaw/WWW/Praveen/slave.ref");
private String cmd_line = "java WebFlow.Server /home/T11F/webflow/WEBFLOW/JIGSAW/Jigsaw/WWW/Praveen/QSslave.conf";
private WebFlowContext ws;
private HttpServletResponse res;
private ORB orb;
String newLine;
protected void doGet(HttpServletRequest req, HttpServletResponse r)
throws ServletException, IOException
{
String status = new String();
String command = req.getParameter("command");
res=r;
//----if URL is osprey4.npac.syr.edu:2956/servlets/fm3?command=start
//----starts the WebFlowServer------------------------------------
System.out.println("out");
System.err.println("err");
try {
Process prc_module_fac = Runtime.getRuntime().exec(cmd_line);
status = "Executed: \n " + cmd_line;
System.err.println(status);
/*
DataInputStream os= new DataInputStream(prc_module_fac.getInputStream());
System.err.println("os");
while( (newLine=os.readLine()) != null){
System.err.println(newLine);}
*/
PrintInBrowser(status);
}
catch (Exception ex) {
System.err.println("Error in starting WebFlowServer :"+ex);
status = "Cannot start " + cmd_line;
}
}
//-------Prints the string status for the applet window------
public void PrintPlainText(String status) throws IOException
{
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println(status);
out.close();
}
//-------Prints the string status in the browser window------
public void PrintInBrowser(String status) throws IOException
{
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("Hello Client!"+
"Hello Client! -0.0
"
+ status
+ "");
out.close();
}
//------Pings the WebFlowServer with sObjRef reference -----------
protected WebFlowContext StringtoObj(String sObjRef)
{
String[] args = new String[1];
args[0] = new String("");
orb = ORB.init(args, new java.util.Properties());
if(orb == null)
{
System.err.println("ORB connecting error");
return null ; //"ORB connecting error";
}
else
{
System.err.println("ORB is created successfully");
org.omg.CORBA.Object obj = orb.string_to_object(sObjRef); ;
return WebFlowContextHelper.narrow(obj);
}
}
//----------------reads object reference from a file------------
public String ReadStringFromFile(String sMasterRef)
throws FileNotFoundException, IOException
{
//open a file
FileInputStream theFile;
BufferedReader fileReader;
String sObjRef;
try {
theFile=new FileInputStream(sMasterRef);
fileReader=new BufferedReader(new InputStreamReader(theFile));
}
catch(FileNotFoundException e){
return "";
}
//read a reference string
try {
sObjRef=fileReader.readLine();
System.err.println("Got the reference: "+sObjRef);
}
catch (IOException e) {
return "";
}
theFile.close();
fileReader.close();
//return the reference string
return sObjRef;
}
public String getServletInfo()
{
return "fm1 -0.0 by Leha & Farhad";
}
}