/*
* 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.testing;
import java.io.Serializable;
import java.util.concurrent.TimeUnit;
import com.github.benmanes.caffeine.cache.Cache;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.github.benmanes.caffeine.cache.RandomSeedEnforcer;
import com.github.benmanes.caffeine.cache.Ticker;
import com.github.benmanes.caffeine.cache.testing.CacheSpec.CacheExecutor;
import com.github.benmanes.caffeine.cache.testing.CacheSpec.CacheExpiry;
import com.github.benmanes.caffeine.cache.testing.CacheSpec.CacheWeigher;
import com.github.benmanes.caffeine.cache.testing.CacheSpec.Expire;
import com.github.benmanes.caffeine.cache.testing.CacheSpec.InitialCapacity;
import com.github.benmanes.caffeine.cache.testing.CacheSpec.Listener;
import com.github.benmanes.caffeine.cache.testing.CacheSpec.Maximum;
import com.github.benmanes.caffeine.cache.testing.CacheSpec.ReferenceType;
/**
* A factory that constructs a {@link Cache} from the {@link CacheContext}.
*
* @author ben.manes@gmail.com (Ben Manes)
*/
public final class CaffeineCacheFromContext {
interface SerializableTicker extends Ticker, Serializable {}
private CaffeineCacheFromContext() {}
public static <K, V> Cache<K, V> newCaffeineCache(CacheContext context) {
Caffeine<Object, Object> builder = Caffeine.newBuilder();
context.caffeine = builder;
if (context.initialCapacity != InitialCapacity.DEFAULT) {
builder.initialCapacity(context.initialCapacity.size());
}
if (context.isRecordingStats()) {
builder.recordStats();
}
if (context.maximumSize != Maximum.DISABLED) {
if (context.weigher == CacheWeigher.DEFAULT) {
builder.maximumSize(context.maximumSize.max());
} else {
builder.weigher(context.weigher);
builder.maximumWeight(context.maximumWeight());
}
}
if (context.expiryType() != CacheExpiry.DISABLED) {
builder.expireAfter(context.expiry);
}
if (context.afterAccess != Expire.DISABLED) {
builder.expireAfterAccess(context.afterAccess.timeNanos(), TimeUnit.NANOSECONDS);
}
if (context.afterWrite != Expire.DISABLED) {
builder.expireAfterWrite(context.afterWrite.timeNanos(), TimeUnit.NANOSECONDS);
}
if (context.refresh != Expire.DISABLED) {
builder.refreshAfterWrite(context.refresh.timeNanos(), TimeUnit.NANOSECONDS);
}
if (context.expires() || context.refreshes()) {
SerializableTicker ticker = context.ticker()::read;
builder.ticker(ticker);
}
if (context.keyStrength == ReferenceType.WEAK) {
builder.weakKeys();
} else if (context.keyStrength == ReferenceType.SOFT) {
throw new IllegalStateException();
}
if (context.isWeakValues()) {
builder.weakValues();
} else if (context.isSoftValues()) {
builder.softValues();
}
if (context.cacheExecutor != CacheExecutor.DEFAULT) {
builder.executor(context.executor);
}
if (context.removalListenerType != Listener.DEFAULT) {
builder.removalListener(context.removalListener);
}
if (context.isStrongKeys() && !context.isAsync()) {
builder.writer(context.cacheWriter());
}
if (context.isAsync()) {
context.asyncCache = builder.buildAsync(
context.isAsyncLoading ? context.loader.async() : context.loader);
context.cache = context.asyncCache.synchronous();
} else if (context.loader == null) {
context.cache = builder.build();
} else {
context.cache = builder.build(context.loader);
}
@SuppressWarnings("unchecked")
Cache<K, V> castedCache = (Cache<K, V>) context.cache;
RandomSeedEnforcer.ensureRandomSeed(castedCache);
return castedCache;
}
}