/*
* Copyright 2015 Ben Manes. All Rights Reserved.
*
* 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 com.github.benmanes.caffeine.cache;
import java.io.Serializable;
import java.util.concurrent.TimeUnit;
/**
* Serializes the configuration of the cache, reconsitituting it as a {@link Cache},
* {@link LoadingCache}, or {@link AsyncLoadingCache} using {@link Caffeine} upon
* deserialization. The data held by the cache is not retained.
*
* @author ben.manes@gmail.com (Ben Manes)
*/
@SuppressWarnings("PMD.TooManyFields")
final class SerializationProxy<K, V> implements Serializable {
private static final long serialVersionUID = 1;
Ticker ticker;
boolean async;
boolean weakKeys;
boolean weakValues;
boolean softValues;
Expiry<?, ?> expiry;
Weigher<?, ?> weigher;
CacheWriter<?, ?> writer;
boolean isRecordingStats;
long expiresAfterWriteNanos;
long expiresAfterAccessNanos;
long refreshAfterWriteNanos;
AsyncCacheLoader<?, ?> loader;
RemovalListener<?, ?> removalListener;
long maximumSize = Caffeine.UNSET_INT;
long maximumWeight = Caffeine.UNSET_INT;
@SuppressWarnings("unchecked")
Caffeine<Object, Object> recreateCaffeine() {
Caffeine<Object, Object> builder = Caffeine.newBuilder();
if (ticker != null) {
builder.ticker(ticker);
}
if (isRecordingStats) {
builder.recordStats();
}
if (maximumSize != Caffeine.UNSET_INT) {
builder.maximumSize(maximumSize);
}
if (maximumWeight != Caffeine.UNSET_INT) {
builder.maximumWeight(maximumWeight);
builder.weigher((Weigher<Object, Object>) weigher);
}
if (expiry != null) {
builder.expireAfter(expiry);
}
if (expiresAfterWriteNanos > 0) {
builder.expireAfterWrite(expiresAfterWriteNanos, TimeUnit.NANOSECONDS);
}
if (expiresAfterAccessNanos > 0) {
builder.expireAfterAccess(expiresAfterAccessNanos, TimeUnit.NANOSECONDS);
}
if (refreshAfterWriteNanos > 0) {
builder.refreshAfterWrite(refreshAfterWriteNanos, TimeUnit.NANOSECONDS);
}
if (weakKeys) {
builder.weakKeys();
}
if (weakValues) {
builder.weakValues();
}
if (softValues) {
builder.softValues();
}
if (removalListener != null) {
builder.removalListener((RemovalListener<Object, Object>) removalListener);
}
if (writer != CacheWriter.disabledWriter()) {
builder.writer((CacheWriter<Object, Object>) writer);
}
return builder;
}
Object readResolve() {
Caffeine<Object, Object> builder = recreateCaffeine();
if (async) {
@SuppressWarnings("unchecked")
AsyncCacheLoader<K, V> cacheLoader = (AsyncCacheLoader<K, V>) loader;
return builder.buildAsync(cacheLoader);
} else if (loader != null) {
@SuppressWarnings("unchecked")
CacheLoader<K, V> cacheLoader = (CacheLoader<K, V>) loader;
return builder.build(cacheLoader);
}
return builder.build();
}
}