/*
* Copyright 2010-2013 Ning, Inc.
*
* Ning 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 com.ning.metrics.meteo.publishers;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.UpdateListener;
import org.apache.commons.mail.HtmlEmail;
import org.apache.log4j.Logger;
import javax.mail.internet.InternetAddress;
import java.util.Arrays;
class AlertListener extends EsperListener implements UpdateListener
{
private final static Logger log = Logger.getLogger(AlertListener.class);
private final AlertPublisherConfig config;
public AlertListener(AlertPublisherConfig config)
{
this.config = config;
}
@Override
public void update(EventBean[] newEvents, EventBean[] oldEvents)
{
// TODO register esper callback which sends email -> how to specify what to look for in the event ?
if (newEvents != null) {
for (EventBean newEvent : newEvents) {
Double result1 = (Double) newEvent.get("result1");
if (result1 != null) {
createAndSendAlertEmail(String.format("Boo ! Result " + result1));
}
}
}
}
private void createAndSendAlertEmail(String body)
{
try {
log.info(String.format("Sending alert email to [%s]: %s", config.getRecipients(), body));
HtmlEmail email = new HtmlEmail();
email.setTextMsg(body);
email.setFrom("esper-is-awesome@example.com");
email.setTo(Arrays.asList(new InternetAddress(config.getRecipients())));
email.setHostName(config.getHost());
email.setSmtpPort(config.getPort());
email.send();
}
catch (Exception ex) {
log.warn("Could not create or send email", ex);
}
}
}