org.apache.rampart.NonceCache Maven / Gradle / Ivy
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/*
* Copyright 2004,2005 The Apache Software Foundation.
*
* 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 org.apache.rampart;
import java.util.*;
import java.util.concurrent.locks.ReentrantLock;
/**
* This is a basic implementation of UniqueMessageAttributeCache. In this implementation we will cache incomming
* nonce value for a period of time. The life time can be defined in the services.xml. If not defined
* the default value will be 5 minutes.
*/
public class NonceCache extends AbstractUniqueMessageAttributeCache {
class Nonce
{
String nonceValue;
String userName;
public Nonce(String nonce, String user)
{
this.nonceValue = nonce;
this.userName = user;
}
@Override
public boolean equals(Object another)
{
if (another == null){
return false;
}
if (another == this) {
return true;
}
if (!(another instanceof Nonce)){
return false;
}
Nonce otherNonce = (Nonce)another;
if (this.userName.equals(otherNonce.userName) && this.nonceValue.equals(otherNonce.nonceValue))
{
return true;
}
return false;
}
@Override
public int hashCode()
{
return (this.userName.hashCode() * 13 + this.nonceValue.hashCode() * 7);
}
}
private Map mapIdNonce = new HashMap();
private final ReentrantLock lock = new ReentrantLock();
public NonceCache()
{
super();
}
public NonceCache(int maxLifeTime)
{
super(maxLifeTime);
}
/**
* @inheritdoc
*/
public void addToCache(String id, String userName) {
Nonce nonce = new Nonce(id, userName);
Calendar rightNow = Calendar.getInstance();
lock.lock();
try {
mapIdNonce.put(nonce, rightNow);
} finally {
lock.unlock();
}
}
/**
* @inheritdoc
*/
public boolean valueExistsInCache(String id, String userName) {
lock.lock();
try {
clearStaleNonceIds();
} finally {
lock.unlock();
}
Nonce nonce = new Nonce(id, userName);
return mapIdNonce.containsKey(nonce);
}
/**
* @inheritdoc
*/
public void clearCache() {
lock.lock();
try {
mapIdNonce.clear();
} finally {
lock.unlock();
}
}
/**
* This method will clear stale nonce ids from the map.
*/
private void clearStaleNonceIds()
{
Calendar rightNow = Calendar.getInstance();
int maxLifeTime = getMaximumLifeTimeOfAnAttribute();
rightNow.add(Calendar.SECOND, -(maxLifeTime));
long timeBeforeMaxLifeTime = rightNow.getTimeInMillis();
Iterator iterator = mapIdNonce.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry pair = (Map.Entry)iterator.next();
Calendar itemDate = (Calendar)pair.getValue();
long itemAddedTime = itemDate.getTimeInMillis();
if (timeBeforeMaxLifeTime > itemAddedTime)
{
iterator.remove();
}
}
}
}