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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tuscany.sca.demos.aggregator;
import java.net.URL;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import org.apache.tuscany.sca.demos.aggregator.types.AlertType;
import org.apache.tuscany.sca.demos.aggregator.types.AlertsType;
import org.apache.tuscany.sca.demos.aggregator.types.TypesFactory;
import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.io.SyndFeedInput;
import com.sun.syndication.io.XmlReader;
/**
* The interface for the rss checker service
*/
public class RSSCheckerServiceImpl implements RSSCheckerService {
public AlertsType getNewAlerts(String rssaddress, String lastchecktimestamp){
// Create the list of alerts to return
TypesFactory factory = TypesFactory.INSTANCE;
AlertsType returnAlerts = factory.createAlertsType();
List returnAlertList = returnAlerts.getAlert();
try {
// lastchecktimestamp comes from sources.xml configuration.
// That origin requires ISO 8601 date input (yyyy-MM-dd hh:mm:ss).
DateFormat configDateFormatter = new SimpleDateFormat( "yyyy-MM-dd hh:mm:ss");
Date timestamp = configDateFormatter.parse(lastchecktimestamp);
// Turn feed dates into something we can process.
DateFormat feedDateFormatter = DateFormat.getDateTimeInstance();
// get the feed data from the supplied address
SyndFeedInput input = new SyndFeedInput();
SyndFeed feed = input.build(new XmlReader(new URL(rssaddress)));
//System.out.println(feed);
// check all the items to see if we have seen them before
List entries = feed.getEntries();
for(Object entry: entries){
SyndEntry syndEntry = (SyndEntry)entry;
// System.err.println( "Entry pubdate=" + syndEntry.getPublishedDate() );
if (syndEntry.getPublishedDate().after(timestamp)){
AlertType newAlert = factory.createAlertType();
newAlert.setTitle(syndEntry.getTitle());
// newAlert.setSummary("<![CDATA[" +
// syndEntry.getDescription().getValue() +
// "]]>");
newAlert.setSummary("");
newAlert.setAddress(syndEntry.getLink());
newAlert.setDate(feedDateFormatter.format(syndEntry.getPublishedDate()));
newAlert.setId(rssaddress);
newAlert.setUnread(true);
returnAlertList.add(newAlert);
}
}
} catch(Exception ex) {
ex.printStackTrace( System.err );
System.err.println("Exception " + ex.toString());
}
return returnAlerts;
}
}
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