/*
* TeleStax, Open Source Cloud Communications
* Copyright 2011-2016, TeleStax Inc. and individual contributors
* by the @authors tag.
*
* This program is free software: you can redistribute it and/or modify
* under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* JBoss, Home of Professional Open Source
* Copyright 2007-2011, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jdiameter.server.impl.app.cxdx;
import org.jdiameter.api.Answer;
import org.jdiameter.api.EventListener;
import org.jdiameter.api.IllegalDiameterStateException;
import org.jdiameter.api.InternalException;
import org.jdiameter.api.NetworkReqListener;
import org.jdiameter.api.OverloadException;
import org.jdiameter.api.Request;
import org.jdiameter.api.RouteException;
import org.jdiameter.api.app.AppEvent;
import org.jdiameter.api.app.StateChangeListener;
import org.jdiameter.api.app.StateEvent;
import org.jdiameter.api.cxdx.ServerCxDxSession;
import org.jdiameter.api.cxdx.ServerCxDxSessionListener;
import org.jdiameter.api.cxdx.events.JLocationInfoAnswer;
import org.jdiameter.api.cxdx.events.JLocationInfoRequest;
import org.jdiameter.api.cxdx.events.JMultimediaAuthAnswer;
import org.jdiameter.api.cxdx.events.JMultimediaAuthRequest;
import org.jdiameter.api.cxdx.events.JPushProfileAnswer;
import org.jdiameter.api.cxdx.events.JPushProfileRequest;
import org.jdiameter.api.cxdx.events.JRegistrationTerminationAnswer;
import org.jdiameter.api.cxdx.events.JRegistrationTerminationRequest;
import org.jdiameter.api.cxdx.events.JServerAssignmentAnswer;
import org.jdiameter.api.cxdx.events.JServerAssignmentRequest;
import org.jdiameter.api.cxdx.events.JUserAuthorizationAnswer;
import org.jdiameter.api.cxdx.events.JUserAuthorizationRequest;
import org.jdiameter.client.api.ISessionFactory;
import org.jdiameter.common.api.app.cxdx.CxDxSessionState;
import org.jdiameter.common.api.app.cxdx.ICxDxMessageFactory;
import org.jdiameter.common.impl.app.AppAnswerEventImpl;
import org.jdiameter.common.impl.app.AppRequestEventImpl;
import org.jdiameter.common.impl.app.cxdx.CxDxSession;
import org.jdiameter.server.impl.app.cxdx.Event.Type;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Cx/Dx Server session implementation
*
* @author <a href="mailto:baranowb@gmail.com">Bartosz Baranowski </a>
* @author <a href="mailto:brainslog@gmail.com"> Alexandre Mendonca </a>
*/
public class CxDxServerSessionImpl extends CxDxSession implements ServerCxDxSession, EventListener<Request, Answer>, NetworkReqListener {
private static final Logger logger = LoggerFactory.getLogger(CxDxServerSessionImpl.class);
// Factories and Listeners --------------------------------------------------
private transient ServerCxDxSessionListener listener;
protected long appId = -1;
protected IServerCxDxSessionData sessionData;
public CxDxServerSessionImpl(IServerCxDxSessionData sessionData, ICxDxMessageFactory fct, ISessionFactory sf, ServerCxDxSessionListener lst) {
super(sf, sessionData);
if (lst == null) {
throw new IllegalArgumentException("Listener can not be null");
}
if ((this.appId = fct.getApplicationId()) < 0) {
throw new IllegalArgumentException("ApplicationId can not be less than zero");
}
this.listener = lst;
super.messageFactory = fct;
this.sessionData = sessionData;
}
/* (non-Javadoc)
* @see org.jdiameter.api.cxdx.ServerCxDxSession#sendLocationInformationAnswer(org.jdiameter.api.cxdx.events.JLocationInfoAnswer)
*/
@Override
public void sendLocationInformationAnswer(JLocationInfoAnswer answer) throws InternalException, IllegalDiameterStateException, RouteException,
OverloadException {
send(Event.Type.SEND_MESSAGE, null, answer);
}
/* (non-Javadoc)
* @see org.jdiameter.api.cxdx.ServerCxDxSession#sendMultimediaAuthAnswer(org.jdiameter.api.cxdx.events.JMultimediaAuthAnswer)
*/
@Override
public void sendMultimediaAuthAnswer(JMultimediaAuthAnswer answer) throws InternalException, IllegalDiameterStateException, RouteException,
OverloadException {
send(Event.Type.SEND_MESSAGE, null, answer);
}
/* (non-Javadoc)
* @see org.jdiameter.api.cxdx.ServerCxDxSession#sendServerAssignmentAnswer(org.jdiameter.api.cxdx.events.JServerAssignmentAnswer)
*/
@Override
public void sendServerAssignmentAnswer(JServerAssignmentAnswer answer) throws InternalException, IllegalDiameterStateException, RouteException,
OverloadException {
send(Event.Type.SEND_MESSAGE, null, answer);
}
/* (non-Javadoc)
* @see org.jdiameter.api.cxdx.ServerCxDxSession#sendUserAuthorizationAnswer(org.jdiameter.api.cxdx.events.JUserAuthorizationAnswer)
*/
@Override
public void sendUserAuthorizationAnswer(JUserAuthorizationAnswer answer) throws InternalException, IllegalDiameterStateException, RouteException,
OverloadException {
send(Event.Type.SEND_MESSAGE, null, answer);
}
/*
* (non-Javadoc)
* @see org.jdiameter.api.cxdx.ServerCxDxSession#sendPushProfileRequest(org.jdiameter.api.cxdx.events.JPushProfileRequest)
*/
@Override
public void sendPushProfileRequest(JPushProfileRequest request) throws InternalException, IllegalDiameterStateException, RouteException, OverloadException {
send(Event.Type.SEND_MESSAGE, request, null);
}
/*
* (non-Javadoc)
* @see org.jdiameter.api.cxdx.ServerCxDxSession#sendRegistrationTerminationRequest(org.jdiameter.api.cxdx.events.JRegistrationTerminationRequest)
*/
@Override
public void sendRegistrationTerminationRequest(JRegistrationTerminationRequest request)
throws InternalException, IllegalDiameterStateException, RouteException, OverloadException {
send(Event.Type.SEND_MESSAGE, request, null);
}
/*
* (non-Javadoc)
* @see org.jdiameter.api.app.StateMachine#getState(java.lang.Class)
*/
@Override
@SuppressWarnings("unchecked")
public <E> E getState(Class<E> stateType) {
return stateType == CxDxSessionState.class ? (E) this.sessionData.getCxDxSessionState() : null;
}
/*
* (non-Javadoc)
* @see org.jdiameter.api.app.StateMachine#handleEvent(org.jdiameter.api.app.StateEvent)
*/
@Override
public boolean handleEvent(StateEvent event) throws InternalException, OverloadException {
try {
sendAndStateLock.lock();
if (!super.session.isValid()) {
// FIXME: throw new InternalException("Generic session is not valid.");
return false;
}
final CxDxSessionState state = this.sessionData.getCxDxSessionState();
CxDxSessionState newState = null;
Event localEvent = (Event) event;
Event.Type eventType = (Type) event.getType();
switch (state) {
case IDLE:
switch (eventType) {
case RECEIVE_LIR:
this.sessionData.setBuffer((Request)((AppEvent) event.getData()).getMessage());
super.cancelMsgTimer();
super.startMsgTimer();
newState = CxDxSessionState.MESSAGE_SENT_RECEIVED;
setState(newState);
listener.doLocationInformationRequest(this, (JLocationInfoRequest) event.getData());
break;
case RECEIVE_MAR:
this.sessionData.setBuffer((Request)((AppEvent) event.getData()).getMessage());
super.cancelMsgTimer();
super.startMsgTimer();
newState = CxDxSessionState.MESSAGE_SENT_RECEIVED;
setState(newState);
listener.doMultimediaAuthRequest(this, (JMultimediaAuthRequest) event.getData());
break;
case RECEIVE_SAR:
this.sessionData.setBuffer((Request)((AppEvent) event.getData()).getMessage());
super.cancelMsgTimer();
super.startMsgTimer();
newState = CxDxSessionState.MESSAGE_SENT_RECEIVED;
setState(newState);
listener.doServerAssignmentRequest(this, (JServerAssignmentRequest) event.getData());
break;
case RECEIVE_UAR:
this.sessionData.setBuffer((Request)((AppEvent) event.getData()).getMessage());
super.cancelMsgTimer();
super.startMsgTimer();
newState = CxDxSessionState.MESSAGE_SENT_RECEIVED;
setState(newState);
listener.doUserAuthorizationRequest(this, (JUserAuthorizationRequest) event.getData());
break;
case SEND_MESSAGE:
super.session.send(((AppEvent) event.getData()).getMessage(), this);
newState = CxDxSessionState.MESSAGE_SENT_RECEIVED;
setState(newState);
break;
default:
logger.error("Wrong action in Cx/Dx Server FSM. State: IDLE, Event Type: {}", eventType);
break;
}
break;
case MESSAGE_SENT_RECEIVED:
switch (eventType) {
case TIMEOUT_EXPIRES:
newState = CxDxSessionState.TIMEDOUT;
break;
case SEND_MESSAGE:
try {
super.session.send(((AppEvent) event.getData()).getMessage(), this);
}
finally {
newState = CxDxSessionState.TERMINATED;
setState(newState);
}
break;
case RECEIVE_PPA:
try {
super.cancelMsgTimer();
listener.doPushProfileAnswer(this, (JPushProfileRequest) localEvent.getRequest(), (JPushProfileAnswer) localEvent.getAnswer());
}
finally {
newState = CxDxSessionState.TERMINATED;
setState(newState);
}
break;
case RECEIVE_RTA:
try {
super.cancelMsgTimer();
listener.doRegistrationTerminationAnswer(this, (JRegistrationTerminationRequest) localEvent.getRequest(),
(JRegistrationTerminationAnswer) localEvent.getAnswer());
}
finally {
newState = CxDxSessionState.TERMINATED;
setState(newState);
}
break;
default:
throw new InternalException("Should not receive more messages after initial. Command: " + event.getData());
}
break;
case TERMINATED:
throw new InternalException("Cant receive message in state TERMINATED. Command: " + event.getData());
case TIMEDOUT:
throw new InternalException("Cant receive message in state TIMEDOUT. Command: " + event.getData());
default:
logger.error("Cx/Dx Server FSM in wrong state: {}", state);
break;
}
}
catch (Exception e) {
throw new InternalException(e);
}
finally {
sendAndStateLock.unlock();
}
return true;
}
@Override
public void release() {
if (isValid()) {
try {
sendAndStateLock.lock();
super.release();
}
catch (Exception e) {
logger.debug("Failed to release session", e);
}
finally {
sendAndStateLock.unlock();
}
}
else {
logger.debug("Trying to release an already invalid session, with Session ID '{}'", getSessionId());
}
}
/*
* (non-Javadoc)
*
* @see
* org.jdiameter.api.EventListener#receivedSuccessMessage(org.jdiameter.
* api.Message, org.jdiameter.api.Message)
*/
@Override
public void receivedSuccessMessage(Request request, Answer answer) {
AnswerDelivery rd = new AnswerDelivery();
rd.session = this;
rd.request = request;
rd.answer = answer;
super.scheduler.execute(rd);
}
/*
* (non-Javadoc)
* @see org.jdiameter.api.EventListener#timeoutExpired(org.jdiameter.api.Message)
*/
@Override
public void timeoutExpired(Request request) {
try {
handleEvent(new Event(Event.Type.TIMEOUT_EXPIRES, new AppRequestEventImpl(request), null));
}
catch (Exception e) {
logger.debug("Failed to process timeout message", e);
}
}
/*
* (non-Javadoc)
* @see org.jdiameter.api.NetworkReqListener#processRequest(org.jdiameter.api.Request)
*/
@Override
public Answer processRequest(Request request) {
RequestDelivery rd = new RequestDelivery();
rd.session = this;
rd.request = request;
super.scheduler.execute(rd);
return null;
}
protected void send(Event.Type type, AppEvent request, AppEvent answer) throws InternalException {
try {
if (type != null) {
handleEvent(new Event(type, request, answer));
}
}
catch (Exception e) {
throw new InternalException(e);
}
}
@SuppressWarnings("unchecked")
protected void setState(CxDxSessionState newState) {
CxDxSessionState oldState = this.sessionData.getCxDxSessionState();
this.sessionData.setCxDxSessionState(newState);
for (StateChangeListener i : stateListeners) {
i.stateChanged(this, oldState, newState);
}
if (newState == CxDxSessionState.TERMINATED || newState == CxDxSessionState.TIMEDOUT) {
super.cancelMsgTimer();
this.release();
}
}
@Override
public void onTimer(String timerName) {
if (timerName.equals(IDLE_SESSION_TIMER_NAME)) {
checkIdleAppSession();
}
else if (timerName.equals(CxDxSession.TIMER_NAME_MSG_TIMEOUT)) {
try {
sendAndStateLock.lock();
try {
handleEvent(new Event(Event.Type.TIMEOUT_EXPIRES, new AppRequestEventImpl(this.sessionData.getBuffer()), null));
}
catch (Exception e) {
logger.debug("Failure handling Timeout event.");
}
this.sessionData.setBuffer(null);
this.sessionData.setTsTimerId(null);
}
finally {
sendAndStateLock.unlock();
}
}
else {
logger.warn("Received an unknown timer '{}' for Session-ID '{}'", timerName, getSessionId());
}
}
private class RequestDelivery implements Runnable {
ServerCxDxSession session;
Request request;
@Override
public void run() {
try {
switch (request.getCommandCode()) {
case JUserAuthorizationRequest.code:
handleEvent(new Event(Event.Type.RECEIVE_UAR, messageFactory.createUserAuthorizationRequest(request), null));
break;
case JServerAssignmentRequest.code:
handleEvent(new Event(Event.Type.RECEIVE_SAR, messageFactory.createServerAssignmentRequest(request), null));
break;
case JMultimediaAuthRequest.code:
handleEvent(new Event(Event.Type.RECEIVE_MAR, messageFactory.createMultimediaAuthRequest(request), null));
break;
case JLocationInfoRequest.code:
handleEvent(new Event(Event.Type.RECEIVE_LIR, messageFactory.createLocationInfoRequest(request), null));
break;
default:
listener.doOtherEvent(session, new AppRequestEventImpl(request), null);
break;
}
}
catch (Exception e) {
logger.debug("Failed to process request message", e);
}
}
}
private class AnswerDelivery implements Runnable {
ServerCxDxSession session;
Answer answer;
Request request;
@Override
public void run() {
try {
switch (answer.getCommandCode()) {
case JPushProfileAnswer.code:
handleEvent(new Event(Event.Type.RECEIVE_PPA, messageFactory.createPushProfileRequest(request), messageFactory.createPushProfileAnswer(answer)));
break;
case JRegistrationTerminationAnswer.code:
handleEvent(new Event(Event.Type.RECEIVE_RTA, messageFactory.createRegistrationTerminationRequest(request),
messageFactory.createRegistrationTerminationAnswer(answer)));
break;
default:
listener.doOtherEvent(session, new AppRequestEventImpl(request), new AppAnswerEventImpl(answer));
break;
}
}
catch (Exception e) {
logger.debug("Failed to process success message", e);
}
}
}
}