/**
* 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.List;
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.CMBErrorCodes;
import com.comcast.cmb.common.util.CMBException;
import com.comcast.cns.io.CNSSubscriptionPopulator;
import com.comcast.cns.model.CNSSubscription;
import com.comcast.cns.persistence.SubscriberNotFoundException;
import com.comcast.cns.util.CNSErrorCodes;
import com.comcast.cns.util.Util;
/**
* List subscriptions by topic
* @author bwolf
*
*/
public class CNSListSubscriptionsByTopicAction extends CNSAction {
private static Logger logger = Logger.getLogger(CNSListSubscriptionsByTopicAction.class);
public CNSListSubscriptionsByTopicAction() {
super("ListSubscriptionsByTopic");
}
/**
* The method simply gets the information from the user and request to call listSubscriptions, then we take
* response and generate an XML response and put it in the parameter response
* @param user the user for whom we are listing the subscription
* @param request the servlet request including all the parameters for the listSubscriptions call
* @param response the response servlet we write to.
*/
@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 nextToken = null;
String topicArn = request.getParameter("TopicArn");
if (request.getParameter("NextToken") != null) {
nextToken = request.getParameter("NextToken");
logger.debug("event=cns_list_topics_by_subscription next_token=" + nextToken + " topic_arn=" + topicArn + " user_id=" + userId);
} else {
logger.debug("event=cns_list_topics_by_subscription topic_arn=" + topicArn + " userId=" + userId);
}
if ((topicArn == null) || (userId == null)) {
logger.error("event=cns_list_topics_by_subscription error_code=InvalidParameters topic_arn=" + topicArn + " user_id=" + userId);
throw new CMBException(CNSErrorCodes.CNS_InvalidParameter,"request parameter does not comply with the associated constraints.");
}
if (!Util.isValidTopicArn(topicArn)) {
logger.error("event=cns_list_topics_by_subscription error_code=InvalidParameters topic_arn=" + topicArn + " user_id=" + userId);
throw new CMBException(CNSErrorCodes.CNS_InvalidParameter,"request parameter does not comply with the associated constraints.");
}
List<CNSSubscription> subscriptions = null;
try {
subscriptions = PersistenceFactory.getSubscriptionPersistence().listSubscriptionsByTopic(nextToken, topicArn, null);
} catch (SubscriberNotFoundException ex) {
throw new CMBException(CMBErrorCodes.InvalidParameterValue, "Invalid parameter nextToken");
}
if (subscriptions.size() >= 100) {
//Check if there are more
nextToken = subscriptions.get(99).getArn();
List<CNSSubscription> nextSubscriptions = PersistenceFactory.getSubscriptionPersistence().listSubscriptionsByTopic(nextToken, topicArn, null);
if (nextSubscriptions.size() ==0) {
nextToken = null;
} else {
logger.debug("event=cns_subscriptionsbytopic_listed event=next_token_created next_token=" + nextToken + " userid=" + userId);
}
}
String out = CNSSubscriptionPopulator.getListSubscriptionByTopicResponse(subscriptions, nextToken);
writeResponse(out, response);
return true;
}
}