com.comcast.cns.controller.CNSSetTopicAttributesAction.java Source code

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Here is the source code for com.comcast.cns.controller.CNSSetTopicAttributesAction.java

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/**
 * 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 javax.servlet.AsyncContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.json.JSONObject;

import com.comcast.cmb.common.model.CMBPolicy;
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.CNSAttributePopulator;
import com.comcast.cns.model.CNSTopicAttributes;
import com.comcast.cns.model.CNSTopicDeliveryPolicy;
import com.comcast.cns.util.CNSErrorCodes;

/**
 * Set topic attributes
 * @author bwolf, jorge
 *
 */
public class CNSSetTopicAttributesAction extends CNSAction {

    private static Logger logger = Logger.getLogger(CNSSetTopicAttributesAction.class);

    public CNSSetTopicAttributesAction() {
        super("SetTopicAttributes");
    }

    private boolean validateDisplayName(String displayName) {

        if (displayName.length() > 100) {
            return false;
        }

        int len = displayName.length();

        for (int i = 0; i < len; i++) {

            char c = displayName.charAt(i);

            if (c < 32 || c > 126) {
                return false;
            }
        }

        return true;
    }

    @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 attributeName = request.getParameter("AttributeName");
        String attributeValue = request.getParameter("AttributeValue");
        String topicArn = request.getParameter("TopicArn");

        if ((userId == null) || (topicArn == null) || (attributeName == null) || (attributeValue == null)) {
            logger.error("event=cns_set_topic_attributes error_code=InvalidParameters attribute_name="
                    + attributeName + " attribute_value=" + attributeValue + " topic_arn=" + topicArn + " user_id="
                    + userId);
            throw new CMBException(CNSErrorCodes.CNS_InvalidParameter, "missing parameters");
        }

        CNSTopicAttributes topicAttributes = new CNSTopicAttributes();

        if (attributeName.equals("DeliveryPolicy")) {

            JSONObject json = new JSONObject(attributeValue);
            CNSTopicDeliveryPolicy deliveryPolicy = new CNSTopicDeliveryPolicy(json);
            topicAttributes.setDeliveryPolicy(deliveryPolicy);
            logger.debug("event=cns_set_topic_delivery_policy topic_arn=" + topicArn + " value="
                    + topicAttributes.getEffectiveDeliveryPolicy());

        } else if (attributeName.equals("Policy")) {

            // validate policy before updating

            try {
                new CMBPolicy(attributeValue);
            } catch (Exception ex) {
                logger.warn("event=invalid_policy topic_arn=" + topicArn + " policy=" + attributeValue, ex);
                throw ex;
            }

            topicAttributes.setPolicy(attributeValue);
            logger.debug(
                    "event=cns_set_topic_policy topic_arn=" + topicArn + "  value=" + topicAttributes.getPolicy());

        } else if (attributeName.equals("DisplayName")) {

            if (validateDisplayName(attributeValue)) {
                topicAttributes.setDisplayName(attributeValue);
                logger.debug(
                        "event=cns_set_topic_display_name topic_arn=" + topicArn + "  value=" + attributeValue);
            } else {
                throw new CMBException(CNSErrorCodes.CNS_InvalidParameter, "Bad Display Name");
            }

        } else {
            logger.error("event=cns_set_topic_attributes error_code=InvalidParameters attribute_name="
                    + attributeName + " attribute_value=" + attributeValue + " topic_arn=" + topicArn + " user_id="
                    + userId);
            throw new CMBException(CNSErrorCodes.CNS_InvalidParameter,
                    "AttributeName: " + attributeName + " is not a valid value");
        }

        PersistenceFactory.getCNSAttributePersistence().setTopicAttributes(topicAttributes, topicArn);
        String out = CNSAttributePopulator.getSetTopicAttributesResponse();
        logger.debug("event=cns_set_topic_attributes attribute_name=" + attributeName + " attribute_value="
                + attributeValue + " topic_arn=" + topicArn + " user_id=" + userId);
        writeResponse(out, response);
        return true;
    }
}