CRCXEndpointSbb.java

/*
 * CallSbb.java
 *
 * The source code contained in this file is in in the public domain.
 * It can be used in any project or product without prior permission,
 * license or royalty payments. There is  NO WARRANTY OF ANY KIND,
 * EXPRESS, IMPLIED OR STATUTORY, INCLUDING, WITHOUT LIMITATION,
 * THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
 * AND DATA ACCURACY.  We do not warrant or make any representations
 * regarding the use of the software or the  results thereof, including
 * but not limited to the correctness, accuracy, reliability or
 * usefulness of the software.
 */
package org.mobicents.mgcp.demo;

import jain.protocol.ip.mgcp.JainMgcpEvent;
import jain.protocol.ip.mgcp.message.CreateConnection;
import jain.protocol.ip.mgcp.message.CreateConnectionResponse;
import jain.protocol.ip.mgcp.message.DeleteConnection;
import jain.protocol.ip.mgcp.message.parms.CallIdentifier;
import jain.protocol.ip.mgcp.message.parms.ConflictingParameterException;
import jain.protocol.ip.mgcp.message.parms.ConnectionDescriptor;
import jain.protocol.ip.mgcp.message.parms.ConnectionIdentifier;
import jain.protocol.ip.mgcp.message.parms.ConnectionMode;
import jain.protocol.ip.mgcp.message.parms.EndpointIdentifier;
import jain.protocol.ip.mgcp.message.parms.ReturnCode;

import java.text.ParseException;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sip.Dialog;
import javax.sip.InvalidArgumentException;
import javax.sip.RequestEvent;
import javax.sip.ServerTransaction;
import javax.sip.SipException;
import javax.sip.address.Address;
import javax.sip.address.AddressFactory;
import javax.sip.header.ContactHeader;
import javax.sip.header.ContentTypeHeader;
import javax.sip.header.FromHeader;
import javax.sip.header.HeaderFactory;
import javax.sip.header.ToHeader;
import javax.sip.message.MessageFactory;
import javax.sip.message.Request;
import javax.sip.message.Response;
import javax.slee.ActivityContextInterface;
import javax.slee.CreateException;
import javax.slee.FactoryException;
import javax.slee.RolledBackContext;
import javax.slee.Sbb;
import javax.slee.SbbContext;
import javax.slee.UnrecognizedActivityException;
import javax.slee.facilities.Tracer;

import net.java.slee.resource.mgcp.JainMgcpProvider;
import net.java.slee.resource.mgcp.MgcpActivityContextInterfaceFactory;
import net.java.slee.resource.mgcp.MgcpConnectionActivity;
import net.java.slee.resource.sip.DialogActivity;
import net.java.slee.resource.sip.SipActivityContextInterfaceFactory;
import net.java.slee.resource.sip.SleeSipProvider;

/**
 * On INVITE this example creates the Connection on endpoint media/test/Loopback/1. On BYE it calls DeleteConnection on
 * endpoint media/test/Loopback/1 without passing the ConnectionIdentifier
 * 
 * @author amit.bhayani
 */
public abstract class CRCXEndpointSbb implements Sbb {

	private static int CALL_ID_GEN = 1;
	private static int GEN = 1000;

	public final static String JBOSS_BIND_ADDRESS = System.getProperty("jboss.bind.address", "127.0.0.1");

	public final static String ENDPOINT_NAME = "media/test/trunk/Loopback/$";

	private SbbContext sbbContext;

	// SIP
	private SleeSipProvider provider;

	private AddressFactory addressFactory;
	private HeaderFactory headerFactory;
	private MessageFactory messageFactory;
	private SipActivityContextInterfaceFactory acif;

	// MGCP
	private JainMgcpProvider mgcpProvider;
	private MgcpActivityContextInterfaceFactory mgcpAcif;

	private Tracer logger;

	/** Creates a new instance of CallSbb */
	public CRCXEndpointSbb() {
	}

	public void onCallCreated(RequestEvent evt, ActivityContextInterface aci) {
		Request request = evt.getRequest();

		FromHeader from = (FromHeader) request.getHeader(FromHeader.NAME);
		ToHeader to = (ToHeader) request.getHeader(ToHeader.NAME);

		logger.info("Incoming call " + from + " " + to);

		// create Dialog and attach SBB to the Dialog Activity
		ActivityContextInterface daci = null;
		try {
			Dialog dialog = provider.getNewDialog(evt.getServerTransaction());
			dialog.terminateOnBye(true);
			daci = acif.getActivityContextInterface((DialogActivity) dialog);
			daci.attach(sbbContext.getSbbLocalObject());
		} catch (Exception e) {
			logger.severe("Error during dialog creation", e);
			respond(evt, Response.SERVER_INTERNAL_ERROR);
			return;
		}

		// respond(evt, Response.RINGING);

		CallIdentifier callID = new CallIdentifier(Integer.toHexString(CALL_ID_GEN++));
		EndpointIdentifier endpointID = new EndpointIdentifier(ENDPOINT_NAME, JBOSS_BIND_ADDRESS + ":2729");

		CreateConnection createConnection = new CreateConnection(this, callID, endpointID, ConnectionMode.SendRecv);

		try {
			String sdp = new String(evt.getRequest().getRawContent());
			createConnection.setRemoteConnectionDescriptor(new ConnectionDescriptor(sdp));
		} catch (ConflictingParameterException e) {
			// should never happen
		}

		int txID = GEN++;
		createConnection.setTransactionHandle(txID);

		MgcpConnectionActivity connectionActivity = null;
		try {
			connectionActivity = mgcpProvider.getConnectionActivity(txID, endpointID);
			ActivityContextInterface epnAci = mgcpAcif.getActivityContextInterface(connectionActivity);
			epnAci.attach(sbbContext.getSbbLocalObject());
		} catch (FactoryException ex) {
			ex.printStackTrace();
		} catch (NullPointerException ex) {
			ex.printStackTrace();
		} catch (UnrecognizedActivityException ex) {
			ex.printStackTrace();
		}

		mgcpProvider.sendMgcpEvents(new JainMgcpEvent[] { createConnection });
	}

	public void onCreateConnectionResponse(CreateConnectionResponse event, ActivityContextInterface aci) {
		logger.info("Receive CRCX response: " + event.getTransactionHandle());

		ServerTransaction txn = getServerTransaction();
		Request request = txn.getRequest();

		ReturnCode status = event.getReturnCode();

		switch (status.getValue()) {
		case ReturnCode.TRANSACTION_EXECUTED_NORMALLY:

			this.setConnectionIdentifier(event.getConnectionIdentifier().toString());
			String sdp = event.getLocalConnectionDescriptor().toString();

			ContentTypeHeader contentType = null;
			try {
				contentType = headerFactory.createContentTypeHeader("application", "sdp");
			} catch (ParseException ex) {
			}

			String localAddress = provider.getListeningPoints()[0].getIPAddress();
			int localPort = provider.getListeningPoints()[0].getPort();

			Address contactAddress = null;
			try {
				contactAddress = addressFactory.createAddress("sip:" + localAddress + ":" + localPort);
			} catch (ParseException ex) {
			}
			ContactHeader contact = headerFactory.createContactHeader(contactAddress);

			Response response = null;
			try {
				response = messageFactory.createResponse(Response.OK, request, contentType, sdp.getBytes());
			} catch (ParseException ex) {
			}

			response.setHeader(contact);
			try {
				txn.sendResponse(response);
			} catch (InvalidArgumentException ex) {
			} catch (SipException ex) {
			}
			break;
		default:
			try {
				response = messageFactory.createResponse(Response.SERVER_INTERNAL_ERROR, request);
				txn.sendResponse(response);
			} catch (Exception ex) {
			}
		}
	}

	public void onCallTerminated(RequestEvent evt, ActivityContextInterface aci) {

		try {
			// EndpointIdentifier endpointID = new EndpointIdentifier(ENDPOINT_NAME, JBOSS_BIND_ADDRESS+":2729");
			EndpointIdentifier endpointID = getMgcpConnectionActivity().getEndpointIdentifier();
			DeleteConnection deleteConnection = new DeleteConnection(this, endpointID);

			int txID = GEN++;

			deleteConnection.setTransactionHandle(txID);
			mgcpProvider.sendMgcpEvents(new JainMgcpEvent[] { deleteConnection });

			// Since DLCX is for Endpoint, we need to explicitly clean the
			// MgcpConnectionActivity for each of the CRCX
			MgcpConnectionActivity mgcpConnectionActivity = mgcpProvider.getConnectionActivity(
					new ConnectionIdentifier(this.getConnectionIdentifier()), endpointID);

			mgcpConnectionActivity.release();

			ServerTransaction tx = evt.getServerTransaction();
			Request request = evt.getRequest();

			Response response = messageFactory.createResponse(Response.OK, request);
			tx.sendResponse(response);
		} catch (Exception e) {
		}

	}

	private void respond(RequestEvent evt, int cause) {
		Request request = evt.getRequest();
		ServerTransaction tx = evt.getServerTransaction();
		try {
			Response response = messageFactory.createResponse(cause, request);
			tx.sendResponse(response);
		} catch (Exception e) {
			logger.warning("Unexpected error: ", e);
		}
	}

	private ServerTransaction getServerTransaction() {
		ActivityContextInterface[] activities = sbbContext.getActivities();
		for (ActivityContextInterface activity : activities) {
			if (activity.getActivity() instanceof ServerTransaction) {
				return (ServerTransaction) activity.getActivity();
			}
		}
		return null;
	}

	private Dialog getDialog() {
		ActivityContextInterface[] activities = sbbContext.getActivities();
		for (ActivityContextInterface activity : activities) {
			if (activity.getActivity() instanceof Dialog) {
				return (Dialog) activity.getActivity();
			}
		}
		return null;
	}

	private MgcpConnectionActivity getMgcpConnectionActivity() {
		ActivityContextInterface[] activities = sbbContext.getActivities();
		for (ActivityContextInterface activity : activities) {
			if (activity.getActivity() instanceof MgcpConnectionActivity) {
				return (MgcpConnectionActivity) activity.getActivity();
			}
		}
		return null;
	}

	public void setSbbContext(SbbContext sbbContext) {
		this.sbbContext = sbbContext;
		this.logger = sbbContext.getTracer(CRCXEndpointSbb.class.getSimpleName());
		try {
			Context ctx = (Context) new InitialContext().lookup("java:comp/env");

			// initialize SIP API
			provider = (SleeSipProvider) ctx.lookup("slee/resources/jainsip/1.2/provider");
			addressFactory = provider.getAddressFactory();
			headerFactory = provider.getHeaderFactory();
			messageFactory = provider.getMessageFactory();
			acif = (SipActivityContextInterfaceFactory) ctx.lookup("slee/resources/jainsip/1.2/acifactory");

			// initialize media api

			mgcpProvider = (JainMgcpProvider) ctx.lookup("slee/resources/jainmgcp/2.0/provider/demo");
			mgcpAcif = (MgcpActivityContextInterfaceFactory) ctx.lookup("slee/resources/jainmgcp/2.0/acifactory/demo");

		} catch (Exception ne) {
			logger.severe("Could not set SBB context:", ne);
		}
	}

	public abstract String getConnectionIdentifier();

	public abstract void setConnectionIdentifier(String connectionIdentifier);

	public void unsetSbbContext() {
		this.sbbContext = null;
		this.logger = null;
	}

	public void sbbCreate() throws CreateException {
	}

	public void sbbPostCreate() throws CreateException {
	}

	public void sbbActivate() {
	}

	public void sbbPassivate() {
	}

	public void sbbLoad() {
	}

	public void sbbStore() {
	}

	public void sbbRemove() {
	}

	public void sbbExceptionThrown(Exception exception, Object object, ActivityContextInterface activityContextInterface) {
	}

	public void sbbRolledBack(RolledBackContext rolledBackContext) {
	}
}