/**
* Copyright 2012 Comcast Corporation
*
* Licensed 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 com.comcast.cns.controller;
import java.util.Date;
import java.util.UUID;
import javax.servlet.AsyncContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import com.comcast.cmb.common.model.User;
import com.comcast.cmb.common.persistence.PersistenceFactory;
import com.comcast.cmb.common.util.CMBException;
import com.comcast.cns.io.CNSSubscriptionPopulator;
import com.comcast.cns.io.CommunicationUtils;
import com.comcast.cns.model.CNSMessage;
import com.comcast.cns.model.CNSMessage.CNSMessageType;
import com.comcast.cns.model.CNSSubscription;
import com.comcast.cns.util.CNSErrorCodes;
import com.comcast.cns.util.Util;
/**
* Subscribe action
* @author bwolf, jorge
*
*/
public class CNSSubscribeAction extends CNSAction {
private static Logger logger = Logger.getLogger(CNSSubscribeAction.class);
public CNSSubscribeAction() {
super("Subscribe");
}
/**
* The method simply gets the information from the user and request to call subscribe on the persistence layer, then we take
* response and generate an XML response and put it in the parameter response
* @param user the user for whom we are subscribing.
* @param asyncContext
*/
@Override
public boolean doAction(User user, AsyncContext asyncContext) throws Exception {
HttpServletRequest request = (HttpServletRequest)asyncContext.getRequest();
HttpServletResponse response = (HttpServletResponse)asyncContext.getResponse();
String userId = user.getUserId();
String endpoint = request.getParameter("Endpoint");
String protocol = request.getParameter("Protocol");
String topicArn = request.getParameter("TopicArn");
if ((endpoint == null) || (protocol == null) || (userId == null) || (topicArn == null)) {
logger.error("event=cns_subscribe error_code=InvalidParameters user_id="+userId+ " topic_arn=" + topicArn +" endpoint=" + endpoint + " protocol=" + protocol);
throw new CMBException(CNSErrorCodes.CNS_InvalidParameter,"request parameter does not comply with the associated constraints.");
}
if (!Util.isValidTopicArn(topicArn)) {
logger.error("event=cns_subscribe error_code=InvalidParameters problem=invalid_arn user_id="+userId+ " topic_arn=" + topicArn +" endpoint=" + endpoint + " protocol=" + protocol);
throw new CMBException(CNSErrorCodes.CNS_InvalidParameter,"request parameter does not comply with the associated constraints.");
}
CNSSubscription.CnsSubscriptionProtocol subProtocol = null;
if (protocol.equals("email-json")) {
subProtocol = CNSSubscription.CnsSubscriptionProtocol.email_json;
} else {
try {
subProtocol = CNSSubscription.CnsSubscriptionProtocol.valueOf(protocol);
} catch (IllegalArgumentException iae) {
logger.error("event=cns_subscribe error_code=InvalidParameters problem=unknown_protocol user_id="+userId+ " topic_arn=" + topicArn +" endpoint=" + endpoint + " protocol=" + protocol);
throw new CMBException(CNSErrorCodes.CNS_InvalidParameter,"request parameter does not comply with the associated constraints.");
}
}
logger.debug("event=cns_subscribe endpoint=" + endpoint + " protocol=" + protocol + " user_id=" + userId + " topic_arn=" + topicArn);
if (!subProtocol.isValidEnpoint(endpoint)) {
logger.error("event=cns_subscribe error_code=InvalidParameters problem=invalidEndpoint user_id="+userId+ " topic_arn=" + topicArn +" endpoint=" + endpoint + " protocol=" + protocol);
throw new CMBException(CNSErrorCodes.CNS_InvalidParameter,"request parameter does not comply with the associated constraints.");
}
CNSSubscription sub = PersistenceFactory.getSubscriptionPersistence().subscribe(endpoint, subProtocol, topicArn, userId);
String subscriptionArn = null;
if (sub.isConfirmed()) {
subscriptionArn = sub.getArn();
} else {
subscriptionArn = "pending confirmation";
String messageId = UUID.randomUUID().toString();
String json = Util.generateConfirmationJson(topicArn, sub.getToken(), messageId);
String ownerUserId = PersistenceFactory.getTopicPersistence().getTopic(topicArn).getUserId();
User topicOwner = PersistenceFactory.getUserPersistence().getUserById(ownerUserId);
try {
CNSMessage message = new CNSMessage();
message.setMessage(json);
message.setSubscriptionArn(sub.getArn());
message.setTopicArn(topicArn);
message.setUserId(topicOwner.getUserId());
message.setMessageType(CNSMessageType.SubscriptionConfirmation);
message.setTimestamp(new Date());
CommunicationUtils.sendMessage(topicOwner, subProtocol, endpoint, message, messageId, topicArn, sub.getArn(), false);
} catch (Exception ex) {
PersistenceFactory.getSubscriptionPersistence().unsubscribe(sub.getArn());
if (ex instanceof CMBException) {
throw new CMBException(CNSErrorCodes.CNS_InvalidParameter, "Invalid parameter: " + ex.getMessage());
} else {
throw new CMBException(CNSErrorCodes.CNS_InvalidParameter, "Invalid parameter: Unreachable endpoint " + endpoint);
}
}
logger.info("event=cns_subscribe_confirmation_request_sent endpoint=" + endpoint + " protocol=" + protocol + " user_id=" + userId + " topic_arn=" + topicArn + " token=" + sub.getToken());
}
String out = CNSSubscriptionPopulator.getSubscribeResponse(subscriptionArn);
writeResponse(out, response);
return true;
}
}