/**
* Copyright (c) 2012-2014, s3auth.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met: 1) Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer. 2) Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution. 3) Neither the name of the s3auth.com nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.s3auth.servlets;
import com.jcabi.aspects.Loggable;
import com.jcabi.log.Logger;
import com.jcabi.manifests.Manifests;
import com.s3auth.hosts.DynamoHosts;
import com.s3auth.hosts.Hosts;
import com.s3auth.hosts.ScheduledCloudWatch;
import com.s3auth.hosts.SyslogHosts;
import java.io.IOException;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
/**
* Application-wide listener that initializes the application on start
* and shuts it down on stop.
*
* <p>The class is mutable and NOT thread-safe.
*
* @author Yegor Bugayenko (yegor@tpc2.com)
* @version $Id$
* @since 0.0.1
*/
@Loggable(Loggable.DEBUG)
public final class HostsListener implements ServletContextListener {
/**
* When was it started.
*/
private final transient long started = System.currentTimeMillis();
/**
* The hosts.
*/
private transient Hosts hosts;
/**
* The Scheduled CloudWatch data sender.
*/
private transient ScheduledCloudWatch cloudwatch;
@Override
public void contextInitialized(final ServletContextEvent event) {
try {
Manifests.append(event.getServletContext());
this.hosts = new SyslogHosts(new DynamoHosts());
this.cloudwatch = new ScheduledCloudWatch();
} catch (final IOException ex) {
Logger.error(
this,
"#contextInitialized(): %[exception]s",
ex
);
throw new IllegalStateException(ex);
}
event.getServletContext().setAttribute(
Hosts.class.getName(),
this.hosts
);
}
@Override
public void contextDestroyed(final ServletContextEvent event) {
if (this.hosts == null) {
Logger.warn(this, "#contextDestroyed(): Hosts is null");
} else {
try {
this.hosts.close();
this.cloudwatch.close();
} catch (final IOException ex) {
Logger.error(
this,
"#contextDestroyed(): %[exception]s",
ex
);
}
}
Logger.info(
this,
"#contextDestroyed(): app was alive for %[ms]s",
System.currentTimeMillis() - this.started
);
org.apache.log4j.LogManager.shutdown();
}
}