io.milton.http.http11.auth.ExpiredNonceRemover Maven / Gradle / Ivy
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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 io.milton.http.http11.auth;
import io.milton.common.Service;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Date;
import java.util.Iterator;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadFactory;
import static java.util.concurrent.TimeUnit.SECONDS;
/**
* Periodically checks a map of Nonce's to remove those which
* have expired.
*
* The map should be a reference to the live map in use by a NonceProvider
*
* @author brad
*/
public class ExpiredNonceRemover implements Runnable, Service {
private static final Logger log = LoggerFactory.getLogger(ExpiredNonceRemover.class);
private static final int INTERVAL = 10;
private final Map nonces;
private final int nonceValiditySeconds;
private final ScheduledExecutorService scheduler;
public ExpiredNonceRemover(Map nonces, int nonceValiditySeconds) {
this.nonces = nonces;
this.nonceValiditySeconds = nonceValiditySeconds;
scheduler = Executors.newScheduledThreadPool(1, new DaemonThreadFactory());
}
public void start() {
log.debug("scheduling checks for expired nonces every {} seconds", INTERVAL);
scheduler.scheduleAtFixedRate(this, 10, INTERVAL, SECONDS);
}
public void stop() {
scheduler.shutdown();
}
public void run() {
Iterator it = nonces.keySet().iterator();
while (it.hasNext()) {
UUID key = it.next();
Nonce n = nonces.get(key);
if (isExpired(n.getIssued())) {
log.debug("removing expired nonce: {}", key);
it.remove();
}
}
}
private boolean isExpired(Date issued) {
long dif = (System.currentTimeMillis() - issued.getTime()) / 1000;
return dif > nonceValiditySeconds;
}
private static class DaemonThreadFactory implements ThreadFactory {
public Thread newThread(Runnable r) {
Thread t = new Thread(r, ExpiredNonceRemover.class.getCanonicalName());
t.setDaemon(true);
return t;
}
}
}