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package examples.publish;
import javax.sip.*;
import javax.sip.address.*;
import javax.sip.header.*;
import javax.sip.message.*;
import java.util.*;

//ifdef SIMULATION
/*
import sim.java.*;
//endif
*/

/**
 * This class is a UAC template. Shootist is the guy that shoots and shootme 
 * is the guy that gets shot.
 *
 *@author M. Ranganathan
 */

public class Subscriber implements SipListener {

	private static SipProvider sipProvider;
	private static AddressFactory addressFactory;
	private static MessageFactory messageFactory;
	private static HeaderFactory headerFactory;
	private static SipStack sipStack;
	private ContactHeader contactHeader;

	protected ClientTransaction subscribeTid;

	protected static final String usageString =
		"java "
			+ "examples.subsnotify.Subscriber \n"
			+ ">>>> is your class path set to the root?";

	private static void usage() {
		System.out.println(usageString);
		System.exit(0);

	}

	public void processRequest(RequestEvent requestReceivedEvent) {
		Request request = requestReceivedEvent.getRequest();
		ServerTransaction serverTransactionId =
			requestReceivedEvent.getServerTransaction();

		System.out.println(
			"\n\nRequest "
				+ request.getMethod()
				+ " received at "
				+ sipStack.getStackName()
				+ " with server transaction id "
				+ serverTransactionId);

		if (request.getMethod().equals(Request.NOTIFY))
			processNotify(request, serverTransactionId);

	}

	public void processNotify(
		Request request,
		ServerTransaction serverTransactionId) {
		try {
			System.out.println("subscriber:  got a notify .");
			if (serverTransactionId == null) {
				System.out.println("subscriber:  null TID.");
				return;
			}
			Dialog dialog = serverTransactionId.getDialog();
			System.out.println("Dialog State = " + dialog.getState());
			Response response = messageFactory.createResponse(200,request);
			serverTransactionId.sendResponse(response);
			SubscriptionStateHeader subscriptionState =  (SubscriptionStateHeader) 
						request.getHeader(SubscriptionStateHeader.NAME);
			// Subscription is terminated.
			if ( subscriptionState.getState().equals(SubscriptionStateHeader.TERMINATED)) {
				dialog.delete();
			}
			

		} catch (Exception ex) {
			ex.printStackTrace();
			System.exit(0);

		}
	}

	public void processResponse(ResponseEvent responseReceivedEvent) {
		System.out.println("Got a response");
		Response response = (Response) responseReceivedEvent.getResponse();
		Transaction tid = responseReceivedEvent.getClientTransaction();

		System.out.println(
			"Response received with client transaction id "
				+ tid
				+ ":\n"
				+ response);
		if (tid == null) {
			System.out.println("Stray response -- dropping ");
			return;
		}
		System.out.println("transaction state is " + tid.getState());
		System.out.println("Dialog = " + tid.getDialog());
		System.out.println("Dialog State is " + tid.getDialog().getState());

	}

	

	public void init() {
		SipFactory sipFactory = null;
		sipStack = null;
		sipProvider = null;
		sipFactory = SipFactory.getInstance();
		sipFactory.setPathName("gov.nist");
		Properties properties = new Properties();
		String transport = "udp";
		properties.setProperty(
			"javax.sip.OUTBOUND_PROXY",
			"127.0.0.1:5070/" + transport);
		properties.setProperty("javax.sip.STACK_NAME", "subscriber");
		properties.setProperty("javax.sip.MAX_MESSAGE_SIZE", "1048576");
		properties.setProperty(
			"gov.nist.javax.sip.DEBUG_LOG",
			"subscriberdebug.txt");
		properties.setProperty(
			"gov.nist.javax.sip.SERVER_LOG",
			"subscriberlog.txt");
		// Drop the client connection after we are done with the transaction.
		properties.setProperty("gov.nist.javax.sip.CACHE_CLIENT_CONNECTIONS", "false");
		// Set to 0 in your production code for max speed.
		// You need  16 for logging traces. 32 for debug + traces.
		// Your code will limp at 32 but it is best for debugging.
		properties.setProperty("gov.nist.javax.sip.TRACE_LEVEL", "32");

		try {
			// Create SipStack object
			sipStack = sipFactory.createSipStack(properties);
			System.out.println("createSipStack " + sipStack);
		} catch (PeerUnavailableException e) {
			// could not find
			// gov.nist.jain.protocol.ip.sip.SipStackImpl
			// in the classpath
			e.printStackTrace();
			System.err.println(e.getMessage());
			System.exit(0);
		}

		try {
			headerFactory = sipFactory.createHeaderFactory();
			addressFactory = sipFactory.createAddressFactory();
			messageFactory = sipFactory.createMessageFactory();
			ListeningPoint lp = sipStack.createListeningPoint("127.0.0.1",5060, "udp");
			sipProvider = sipStack.createSipProvider(lp);
			Subscriber listener = this;
			sipProvider.addSipListener(listener);
			lp = sipStack.createListeningPoint("127.0.0.1",5060, "tcp");
			SipProvider sipProvider1 = sipStack.createSipProvider(lp);
			sipProvider1.addSipListener(listener);
			String fromName = "BigGuy";
			String fromSipAddress = "here.com";
			String fromDisplayName = "The Master Blaster";

			String toSipAddress = "there.com";
			String toUser = "LittleGuy";
			String toDisplayName = "The Little Blister";

			// create >From Header
			SipURI fromAddress =
				addressFactory.createSipURI(fromName, fromSipAddress);

			Address fromNameAddress = addressFactory.createAddress(fromAddress);
			fromNameAddress.setDisplayName(fromDisplayName);
			FromHeader fromHeader =
				headerFactory.createFromHeader(fromNameAddress, "12345");

			// create To Header
			SipURI toAddress =
				addressFactory.createSipURI(toUser, toSipAddress);
			Address toNameAddress = addressFactory.createAddress(toAddress);
			toNameAddress.setDisplayName(toDisplayName);
			ToHeader toHeader =
				headerFactory.createToHeader(toNameAddress, null);

			// create Request URI
			SipURI requestURI =
				addressFactory.createSipURI(toUser, toSipAddress);


			// Create ViaHeaders

			ArrayList viaHeaders = new ArrayList();
			int port = sipProvider.getListeningPoint("udp").getPort();
			ViaHeader viaHeader =
				headerFactory.createViaHeader(
					"127.0.0.1",
					port,
					transport,
					null);


			// add via headers
			viaHeaders.add(viaHeader);

			
			// Create a new CallId header
			CallIdHeader callIdHeader = sipProvider.getNewCallId();

			// Create a new Cseq header
			CSeqHeader cSeqHeader =
				headerFactory.createCSeqHeader(1L, Request.SUBSCRIBE);

			// Create a new MaxForwardsHeader
			MaxForwardsHeader maxForwards =
				headerFactory.createMaxForwardsHeader(70);

			// Create the request.
			Request request =
				messageFactory.createRequest(
					requestURI,
					Request.SUBSCRIBE,
					callIdHeader,
					cSeqHeader,
					fromHeader,
					toHeader,
					viaHeaders,
					maxForwards);
			// Create contact headers
			String host = lp.getIPAddress();

			SipURI contactUrl = addressFactory.createSipURI(fromName, host);
			contactUrl.setPort(lp.getPort());

			// Create the contact name address.
			SipURI contactURI = addressFactory.createSipURI(fromName, host);
			contactURI.setPort(sipProvider.getListeningPoint("udp").getPort());

			Address contactAddress = addressFactory.createAddress(contactURI);

			// Add the contact address.
			contactAddress.setDisplayName(fromName);

			contactHeader =
				headerFactory.createContactHeader(contactAddress);
			request.addHeader(contactHeader);

			// Create the client transaction.
			listener.subscribeTid = sipProvider.getNewClientTransaction(request);

			// send the request out.
			listener.subscribeTid.sendRequest();

		} catch (Exception ex) {
			System.out.println(ex.getMessage());
			ex.printStackTrace();
			usage();
		}
	}

	public static void main(String args[]) {
		new Subscriber().init();

	}

	public void processIOException(IOExceptionEvent exceptionEvent) {
		System.out.println("io exception event recieved");
	}

	public void processTransactionTerminated(TransactionTerminatedEvent transactionTerminatedEvent) {
		System.out.println("transaction terminated");
		
	}

	public void processDialogTerminated(DialogTerminatedEvent dialogTerminatedEvent) {
		System.out.println("dialog terminated event	recieved");
	}
	public void processTimeout(javax.sip.TimeoutEvent timeoutEvent) {

		System.out.println("Transaction Time out");
	}
}




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