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/*
* 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
*
* 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.client.impl.app.s6a;
import org.jdiameter.api.*;
import org.jdiameter.api.app.AppEvent;
import org.jdiameter.api.app.StateChangeListener;
import org.jdiameter.api.app.StateEvent;
import org.jdiameter.api.s6a.ClientS6aSession;
import org.jdiameter.api.s6a.ClientS6aSessionListener;
import org.jdiameter.api.s6a.events.*;
import org.jdiameter.client.api.ISessionFactory;
import org.jdiameter.client.impl.app.s6a.Event.Type;
import org.jdiameter.common.api.app.s6a.IS6aMessageFactory;
import org.jdiameter.common.api.app.s6a.S6aSessionState;
import org.jdiameter.common.impl.app.AppAnswerEventImpl;
import org.jdiameter.common.impl.app.AppRequestEventImpl;
import org.jdiameter.common.impl.app.s6a.S6aSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Diameter S6a Client Session implementation
*
* @author Alexandre Mendonca
*/
@SuppressWarnings("all") //3rd party lib
public class S6aClientSessionImpl extends S6aSession
implements ClientS6aSession, EventListener, NetworkReqListener
{
private static final Logger logger = LoggerFactory.getLogger(S6aClientSessionImpl.class);
// Factories and Listeners --------------------------------------------------
private transient ClientS6aSessionListener listener;
protected long appId = -1;
protected IClientS6aSessionData sessionData;
public S6aClientSessionImpl(IClientS6aSessionData sessionData, IS6aMessageFactory fct, ISessionFactory sf,
ClientS6aSessionListener lst)
{
super(sf, sessionData);
if (lst == null) {
throw new IllegalArgumentException("Listener can not be null");
}
if (fct.getApplicationId() < 0) {
throw new IllegalArgumentException("ApplicationId can not be less than zero");
}
this.appId = fct.getApplicationId();
this.listener = lst;
super.messageFactory = fct;
this.sessionData = sessionData;
}
public void setListener(ClientS6aSessionListener listener)
{
this.listener = listener;
}
/*
* (non-Javadoc)
*
* @see org.jdiameter.api.app.StateMachine#getState(java.lang.Class)
*/
@Override
@SuppressWarnings("unchecked")
public E getState(Class stateType)
{
return stateType == S6aSessionState.class ? (E) this.sessionData.getS6aSessionState() : null;
}
/*
* (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;
}
@Override
public void sendAuthenticationInformationRequest(JAuthenticationInformationRequest request)
throws InternalException, IllegalDiameterStateException, RouteException, OverloadException
{
send(Event.Type.SEND_MESSAGE, request, null);
}
@Override
public void sendPurgeUERequest(JPurgeUERequest request)
throws InternalException, IllegalDiameterStateException, RouteException, OverloadException
{
send(Event.Type.SEND_MESSAGE, request, null);
}
@Override
public void sendNotifyRequest(JNotifyRequest request)
throws InternalException, IllegalDiameterStateException, RouteException, OverloadException
{
send(Event.Type.SEND_MESSAGE, request, null);
}
@Override
public void sendUpdateLocationRequest(JUpdateLocationRequest request)
throws InternalException, IllegalDiameterStateException, RouteException, OverloadException
{
send(Event.Type.SEND_MESSAGE, request, null);
}
@Override
public void sendCancelLocationAnswer(JCancelLocationAnswer answer)
throws InternalException, IllegalDiameterStateException, RouteException, OverloadException
{
send(Event.Type.SEND_MESSAGE, null, answer);
}
@Override
public void sendInsertSubscriberDataAnswer(JInsertSubscriberDataAnswer answer)
throws InternalException, IllegalDiameterStateException, RouteException, OverloadException
{
send(Event.Type.SEND_MESSAGE, null, answer);
}
@Override
public void sendDeleteSubscriberDataAnswer(JDeleteSubscriberDataAnswer answer)
throws InternalException, IllegalDiameterStateException, RouteException, OverloadException
{
send(Event.Type.SEND_MESSAGE, null, answer);
}
@Override
public void sendResetAnswer(JResetAnswer answer)
throws InternalException, IllegalDiameterStateException, RouteException, OverloadException
{
send(Event.Type.SEND_MESSAGE, null, answer);
}
/*
* (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);
}
}
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);
}
}
@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 S6aSessionState state = this.sessionData.getS6aSessionState();
S6aSessionState newState = null;
Event localEvent = (Event) event;
Event.Type eventType = (Type) event.getType();
switch (state) {
case IDLE:
switch (eventType) {
case RECEIVE_CLR:
this.sessionData.setBuffer((Request) ((AppEvent) event.getData()).getMessage());
super.startMsgTimer();
newState = S6aSessionState.MESSAGE_SENT_RECEIVED;
setState(newState);
listener.doCancelLocationRequestEvent(this, (JCancelLocationRequest) event.getData());
break;
case RECEIVE_IDR:
newState = S6aSessionState.MESSAGE_SENT_RECEIVED;
setState(newState);
this.sessionData.setBuffer((Request) ((AppEvent) event.getData()).getMessage());
super.startMsgTimer();
listener.doInsertSubscriberDataRequestEvent(this, (JInsertSubscriberDataRequest) event.getData());
break;
case RECEIVE_DSR:
newState = S6aSessionState.MESSAGE_SENT_RECEIVED;
setState(newState);
this.sessionData.setBuffer((Request) ((AppEvent) event.getData()).getMessage());
super.startMsgTimer();
listener.doDeleteSubscriberDataRequestEvent(this, (JDeleteSubscriberDataRequest) event.getData());
break;
case RECEIVE_RSR:
newState = S6aSessionState.MESSAGE_SENT_RECEIVED;
setState(newState);
this.sessionData.setBuffer((Request) ((AppEvent) event.getData()).getMessage());
super.startMsgTimer();
listener.doResetRequestEvent(this, (JResetRequest) event.getData());
break;
case SEND_MESSAGE:
newState = S6aSessionState.MESSAGE_SENT_RECEIVED;
super.session.send(((AppEvent) event.getData()).getMessage(), this);
setState(newState); //FIXME: is this ok to be here?
break;
default:
logger.error("Invalid Event Type {} for S6a Client Session at state {}.", eventType,
sessionData.getS6aSessionState());
break;
}
break;
case MESSAGE_SENT_RECEIVED:
switch (eventType) {
case TIMEOUT_EXPIRES:
newState = S6aSessionState.TIMEDOUT;
setState(newState);
break;
case SEND_MESSAGE:
try {
super.session.send(((AppEvent) event.getData()).getMessage(), this);
}
finally {
newState = S6aSessionState.TERMINATED;
setState(newState);
}
break;
case RECEIVE_ULA:
newState = S6aSessionState.TERMINATED;
setState(newState);
super.cancelMsgTimer();
listener.doUpdateLocationAnswerEvent(this, (JUpdateLocationRequest) localEvent.getRequest(),
(JUpdateLocationAnswer) localEvent.getAnswer());
break;
case RECEIVE_AIA:
newState = S6aSessionState.TERMINATED;
setState(newState);
super.cancelMsgTimer();
listener.doAuthenticationInformationAnswerEvent(this,
(JAuthenticationInformationRequest) localEvent.getRequest(),
(JAuthenticationInformationAnswer) localEvent.getAnswer());
break;
case RECEIVE_PUA:
newState = S6aSessionState.TERMINATED;
setState(newState);
super.cancelMsgTimer();
listener.doPurgeUEAnswerEvent(this, (JPurgeUERequest) localEvent.getRequest(),
(JPurgeUEAnswer) localEvent.getAnswer());
break;
case RECEIVE_NOA:
newState = S6aSessionState.TERMINATED;
setState(newState);
super.cancelMsgTimer();
listener.doNotifyAnswerEvent(this, (JNotifyRequest) localEvent.getRequest(),
(JNotifyAnswer) localEvent.getAnswer());
break;
default:
throw new InternalException("Unexpected/Unknown message received: " + 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("S6a Client FSM in wrong state: {}", state);
break;
}
}
catch (Exception e) {
throw new InternalException(e);
}
finally {
sendAndStateLock.unlock();
}
return true;
}
@SuppressWarnings("unchecked")
protected void setState(S6aSessionState newState)
{
S6aSessionState oldState = this.sessionData.getS6aSessionState();
this.sessionData.setS6aSessionState(newState);
for (StateChangeListener i : stateListeners) {
i.stateChanged(this, oldState, newState);
}
if (newState == S6aSessionState.TERMINATED || newState == S6aSessionState.TIMEDOUT) {
super.cancelMsgTimer();
this.release();
}
}
/*
* (non-Javadoc)
*
* @see org.jdiameter.common.impl.app.AppSessionImpl#onTimer(java.lang.String)
*/
@Override
public void onTimer(String timerName)
{
if (timerName.equals(IDLE_SESSION_TIMER_NAME)) {
checkIdleAppSession();
} else if (timerName.equals(S6aSession.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());
}
}
/*
* (non-Javadoc)
*
* @see org.jdiameter.common.impl.app.s6a.S6aSession#hashCode()
*/
@Override
public int hashCode()
{
final int prime = 31;
int result = super.hashCode();
result = prime * result + (int) (appId ^ (appId >>> 32));
return result;
}
/*
* (non-Javadoc)
*
* @see org.jdiameter.common.impl.app.s6a.S6aSession#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if (!super.equals(obj)) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
S6aClientSessionImpl other = (S6aClientSessionImpl) obj;
if (appId != other.appId) {
return false;
}
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());
}
}
private class RequestDelivery implements Runnable
{
ClientS6aSession session;
Request request;
@Override
public void run()
{
try {
switch (request.getCommandCode()) {
case JCancelLocationRequest.code:
handleEvent(
new Event(Event.Type.RECEIVE_CLR, messageFactory.createCancelLocationRequest(request), null));
break;
case JInsertSubscriberDataRequest.code:
handleEvent(new Event(Event.Type.RECEIVE_IDR, messageFactory.createInsertSubscriberDataRequest(request),
null));
break;
case JDeleteSubscriberDataRequest.code:
handleEvent(new Event(Event.Type.RECEIVE_DSR, messageFactory.createDeleteSubscriberDataRequest(request),
null));
break;
case JResetRequest.code:
handleEvent(new Event(Event.Type.RECEIVE_RSR, messageFactory.createResetRequest(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
{
ClientS6aSession session;
Answer answer;
Request request;
@Override
public void run()
{
try {
switch (answer.getCommandCode()) {
case JUpdateLocationAnswer.code:
handleEvent(new Event(Event.Type.RECEIVE_ULA, messageFactory.createUpdateLocationRequest(request),
messageFactory.createUpdateLocationAnswer(answer)));
break;
case JAuthenticationInformationAnswer.code:
handleEvent(new Event(Event.Type.RECEIVE_AIA,
messageFactory.createAuthenticationInformationRequest(request),
messageFactory.createAuthenticationInformationAnswer(answer)));
break;
case JPurgeUEAnswer.code:
handleEvent(new Event(Event.Type.RECEIVE_PUA, messageFactory.createPurgeUERequest(request),
messageFactory.createPurgeUEAnswer(answer)));
break;
case JNotifyAnswer.code:
handleEvent(new Event(Event.Type.RECEIVE_NOA, messageFactory.createNotifyRequest(request),
messageFactory.createNotifyAnswer(answer)));
break;
default:
listener.doOtherEvent(session, new AppRequestEventImpl(request), new AppAnswerEventImpl(answer));
break;
}
}
catch (Exception e) {
logger.debug("Failed to process success message", e);
}
}
}
}
