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* JBoss, Home of Professional Open Source
* Copyright 2009 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.container.entries;
import org.infinispan.io.UnsignedNumeric;
import org.infinispan.marshall.AbstractExternalizer;
import org.infinispan.marshall.Ids;
import org.infinispan.util.Util;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Set;
import static java.lang.Math.min;
/**
* A cache entry that is both transient and mortal.
*
* @author Manik Surtani
* @since 4.0
*/
public class TransientMortalCacheEntry extends AbstractInternalCacheEntry {
protected TransientMortalCacheValue cacheValue;
public TransientMortalCacheEntry(Object key, Object value, long maxIdle, long lifespan) {
super(key);
final long currentTimeMillis = System.currentTimeMillis();
cacheValue = new TransientMortalCacheValue(value, currentTimeMillis, lifespan, maxIdle);
touch(currentTimeMillis);
}
protected TransientMortalCacheEntry(Object key, Object value) {
super(key);
final long currentTimeMillis = System.currentTimeMillis();
cacheValue = new TransientMortalCacheValue(value, currentTimeMillis);
touch(currentTimeMillis);
}
protected TransientMortalCacheEntry(Object key, TransientMortalCacheValue value) {
super(key);
this.cacheValue = value;
}
public TransientMortalCacheEntry(Object key, Object value, long maxIdle, long lifespan, long lastUsed, long created) {
super(key);
this.cacheValue = new TransientMortalCacheValue(value, created, lifespan, maxIdle, lastUsed);
}
@Override
public void setLifespan(long lifespan) {
this.cacheValue.lifespan = lifespan;
}
@Override
public void setMaxIdle(long maxIdle) {
this.cacheValue.maxIdle = maxIdle;
}
@Override
public Object getValue() {
return cacheValue.value;
}
@Override
public long getLifespan() {
return cacheValue.lifespan;
}
@Override
public final boolean canExpire() {
return true;
}
@Override
public long getCreated() {
return cacheValue.created;
}
@Override
public boolean isExpired(long now) {
return cacheValue.isExpired(now);
}
@Override
public boolean isExpired() {
return cacheValue.isExpired();
}
@Override
public final long getExpiryTime() {
long lset = cacheValue.lifespan > -1 ? cacheValue.created + cacheValue.lifespan : -1;
long muet = cacheValue.maxIdle > -1 ? cacheValue.lastUsed + cacheValue.maxIdle : -1;
if (lset == -1) return muet;
if (muet == -1) return lset;
return min(lset, muet);
}
@Override
public InternalCacheValue toInternalCacheValue() {
return cacheValue;
}
@Override
public long getLastUsed() {
return cacheValue.lastUsed;
}
@Override
public final void touch() {
cacheValue.lastUsed = System.currentTimeMillis();
}
@Override
public final void touch(long currentTimeMillis) {
cacheValue.lastUsed = currentTimeMillis;
}
@Override
public final void reincarnate() {
cacheValue.created = System.currentTimeMillis();
}
@Override
public long getMaxIdle() {
return cacheValue.maxIdle;
}
@Override
public Object setValue(Object value) {
return cacheValue.setValue(value);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
TransientMortalCacheEntry that = (TransientMortalCacheEntry) o;
if (cacheValue.created != that.cacheValue.created) return false;
if (cacheValue.lifespan != that.cacheValue.lifespan) return false;
return true;
}
@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + (int) (cacheValue.created ^ (cacheValue.created >>> 32));
result = 31 * result + (int) (cacheValue.lifespan ^ (cacheValue.lifespan >>> 32));
return result;
}
@Override
public TransientMortalCacheEntry clone() {
TransientMortalCacheEntry clone = (TransientMortalCacheEntry) super.clone();
clone.cacheValue = cacheValue.clone();
return clone;
}
@Override
public String toString() {
return getClass().getSimpleName() + "{" +
"key=" + key +
", value=" + cacheValue +
"}";
}
public static class Externalizer extends AbstractExternalizer<TransientMortalCacheEntry> {
@Override
public void writeObject(ObjectOutput output, TransientMortalCacheEntry entry) throws IOException {
output.writeObject(entry.key);
output.writeObject(entry.cacheValue.value);
UnsignedNumeric.writeUnsignedLong(output, entry.cacheValue.created);
output.writeLong(entry.cacheValue.lifespan); // could be negative so should not use unsigned longs
UnsignedNumeric.writeUnsignedLong(output, entry.cacheValue.lastUsed);
output.writeLong(entry.cacheValue.maxIdle); // could be negative so should not use unsigned longs
}
@Override
public TransientMortalCacheEntry readObject(ObjectInput input) throws IOException, ClassNotFoundException {
Object k = input.readObject();
Object v = input.readObject();
long created = UnsignedNumeric.readUnsignedLong(input);
Long lifespan = input.readLong();
long lastUsed = UnsignedNumeric.readUnsignedLong(input);
Long maxIdle = input.readLong();
return new TransientMortalCacheEntry(k, v, maxIdle, lifespan, lastUsed, created);
}
@Override
public Integer getId() {
return Ids.TRANSIENT_MORTAL_ENTRY;
}
@Override
public Set<Class<? extends TransientMortalCacheEntry>> getTypeClasses() {
return Util.<Class<? extends TransientMortalCacheEntry>>asSet(TransientMortalCacheEntry.class);
}
}
}