| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.component.sip.listener; |
| |
| import javax.sip.Dialog; |
| import javax.sip.DialogTerminatedEvent; |
| import javax.sip.IOExceptionEvent; |
| import javax.sip.RequestEvent; |
| import javax.sip.ResponseEvent; |
| import javax.sip.ServerTransaction; |
| import javax.sip.SipListener; |
| import javax.sip.SipProvider; |
| import javax.sip.Transaction; |
| import javax.sip.TransactionTerminatedEvent; |
| import javax.sip.header.SubscriptionStateHeader; |
| import javax.sip.header.ViaHeader; |
| import javax.sip.message.Request; |
| import javax.sip.message.Response; |
| |
| import org.apache.camel.CamelException; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.ExchangePattern; |
| import org.apache.camel.component.sip.SipSubscriber; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class SipSubscriptionListener implements SipListener { |
| private static final transient Logger LOG = LoggerFactory.getLogger(SipSubscriptionListener.class); |
| private SipSubscriber sipSubscriber; |
| private Dialog subscriberDialog; |
| private Dialog forkedDialog; |
| |
| public SipSubscriptionListener(SipSubscriber sipSubscriber) { |
| this.setSipSubscriber(sipSubscriber); |
| } |
| |
| private void dispatchExchange(Object response) throws CamelException { |
| LOG.debug("Consumer Dispatching the received notification along the route"); |
| Exchange exchange = sipSubscriber.getEndpoint().createExchange(ExchangePattern.InOnly); |
| exchange.getIn().setBody(response); |
| try { |
| sipSubscriber.getProcessor().process(exchange); |
| } catch (Exception e) { |
| throw new CamelException("Error in consumer while dispatching exchange", e); |
| } |
| } |
| |
| public void processRequest(RequestEvent requestReceivedEvent) { |
| Request request = requestReceivedEvent.getRequest(); |
| ServerTransaction serverTransactionId = requestReceivedEvent |
| .getServerTransaction(); |
| String viaBranch = ((ViaHeader)(request.getHeaders(ViaHeader.NAME).next())).getParameter("branch"); |
| LOG.debug("Request: {}", request.getMethod()); |
| LOG.debug("Server Transaction Id: {}", serverTransactionId); |
| LOG.debug("Received From Branch: {}", viaBranch); |
| |
| if (request.getMethod().equals(Request.NOTIFY)) { |
| processNotify(requestReceivedEvent, serverTransactionId); |
| } |
| } |
| |
| public synchronized void processNotify(RequestEvent requestEvent, |
| ServerTransaction serverTransactionId) { |
| LOG.debug("Notification received at Subscriber"); |
| SipProvider provider = (SipProvider) requestEvent.getSource(); |
| Request notify = requestEvent.getRequest(); |
| try { |
| if (serverTransactionId == null) { |
| LOG.info("ServerTransaction is null. Creating new Server transaction"); |
| serverTransactionId = provider.getNewServerTransaction(notify); |
| } |
| Dialog dialog = serverTransactionId.getDialog(); |
| |
| if (dialog != subscriberDialog) { |
| forkedDialog = dialog; |
| } |
| //Dispatch the response along the route |
| dispatchExchange(notify.getContent()); |
| |
| // Send back an success response |
| Response response = sipSubscriber.getConfiguration().getMessageFactory().createResponse(200, notify); |
| response.addHeader(sipSubscriber.getConfiguration().getContactHeader()); |
| serverTransactionId.sendResponse(response); |
| |
| SubscriptionStateHeader subscriptionState = (SubscriptionStateHeader) notify |
| .getHeader(SubscriptionStateHeader.NAME); |
| |
| // Subscription is terminated? |
| if (subscriptionState.getState().equalsIgnoreCase(SubscriptionStateHeader.TERMINATED)) { |
| LOG.info("Subscription state is terminated. Deleting the current dialog"); |
| dialog.delete(); |
| } |
| } catch (Exception e) { |
| LOG.error("Exception thrown during Notify processing in the SipSubscriptionListener.", e); |
| } |
| } |
| |
| public void processResponse(ResponseEvent responseReceivedEvent) { |
| LOG.debug("Response received at Subscriber"); |
| Response response = responseReceivedEvent.getResponse(); |
| Transaction clientTransactionId = responseReceivedEvent.getClientTransaction(); |
| |
| LOG.debug("Response received with client transaction id {}:{}", clientTransactionId, response.getStatusCode()); |
| if (clientTransactionId == null) { |
| if (LOG.isWarnEnabled()) { |
| LOG.warn("Stray response -- dropping"); |
| } |
| return; |
| } |
| } |
| |
| public void processIOException(IOExceptionEvent exceptionEvent) { |
| if (LOG.isWarnEnabled()) { |
| LOG.warn("IOExceptionEvent received at Sip Subscription Listener"); |
| } |
| } |
| |
| public void processTransactionTerminated( |
| TransactionTerminatedEvent transactionTerminatedEvent) { |
| if (LOG.isWarnEnabled()) { |
| LOG.warn("TransactionTerminatedEvent received at Sip Subscription Listener"); |
| } |
| } |
| |
| public void processDialogTerminated( |
| DialogTerminatedEvent dialogTerminatedEvent) { |
| if (LOG.isWarnEnabled()) { |
| LOG.warn("DialogTerminatedEvent received at Sip Subscription Listener"); |
| } |
| } |
| |
| public void processTimeout(javax.sip.TimeoutEvent timeoutEvent) { |
| if (LOG.isWarnEnabled()) { |
| LOG.warn("TimeoutEvent received at Sip Subscription Listener"); |
| } |
| } |
| |
| public void setSipSubscriber(SipSubscriber sipSubscriber) { |
| this.sipSubscriber = sipSubscriber; |
| } |
| |
| public SipSubscriber getSipSubscriber() { |
| return sipSubscriber; |
| } |
| |
| public Dialog getForkedDialog() { |
| return forkedDialog; |
| } |
| } |