Example usage for com.google.common.cache CacheBuilder weakValues

List of usage examples for com.google.common.cache CacheBuilder weakValues

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Introduction

In this page you can find the example usage for com.google.common.cache CacheBuilder weakValues.

Prototype

@GwtIncompatible("java.lang.ref.WeakReference")
public CacheBuilder<K, V> weakValues()

Source Link

Document

Specifies that each value (not key) stored in the cache should be wrapped in a WeakReference (by default, strong references are used).

Usage

From source file:com.davidbracewell.cache.impl.GuavaCacheUtils.java

/**
 * Converts a CacheSpec into a CacheBuilder
 *
 * @param specification The specification
 * @param <K>           The key type
 * @param <V>           The value type
 * @return The CacheBuilder//from  ww w .jav a2 s  .  c o m
 */
public static <K, V> CacheBuilder<K, V> cacheBuilderFromSpec(CacheSpec<K, V> specification) {
    CacheBuilder cacheBuilder = CacheBuilder.newBuilder();
    if (specification.getMaxSize() > 0) {
        cacheBuilder.maximumSize(specification.getMaxSize());
    }
    if (specification.getConcurrencyLevel() > 0) {
        cacheBuilder.concurrencyLevel(specification.getMaxSize());
    }
    if (specification.getInitialCapacity() > 0) {
        cacheBuilder.initialCapacity(specification.getInitialCapacity());
    }
    if (specification.getExpiresAfterAccess() > 0) {
        cacheBuilder.expireAfterAccess(specification.getExpiresAfterAccess(), TimeUnit.MILLISECONDS);
    }
    if (specification.getExpiresAfterWrite() > 0) {
        cacheBuilder.expireAfterWrite(specification.getExpiresAfterWrite(), TimeUnit.MILLISECONDS);
    }
    if (specification.isWeakKeys()) {
        cacheBuilder.weakKeys();
    }
    if (specification.isWeakValues()) {
        cacheBuilder.weakValues();
    }
    return Cast.as(cacheBuilder);
}

From source file:com.navercorp.pinpoint.profiler.context.active.ActiveTraceRepository.java

private ConcurrentMap<Long, ActiveTrace> createCache(int maxActiveTraceSize) {
    final CacheBuilder<Object, Object> cacheBuilder = CacheBuilder.newBuilder();
    cacheBuilder.concurrencyLevel(64);//w  ww. jav a2 s . com
    cacheBuilder.initialCapacity(maxActiveTraceSize);
    cacheBuilder.maximumSize(maxActiveTraceSize);
    // OOM defense
    cacheBuilder.weakValues();

    final Cache<Long, ActiveTrace> localCache = cacheBuilder.build();
    return localCache.asMap();
}

From source file:uk.q3c.krail.core.user.opt.GuavaCacheConfiguration.java

public CacheBuilder<Object, Object> builder() {
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();
    if (initialCapacity != null) {
        builder.initialCapacity(initialCapacity);
    }// w w w .  j  a va  2 s .c  om
    if (maximumSize != null) {
        builder.maximumSize(maximumSize);
    }
    if (maximumWeight != null) {
        builder.maximumWeight(maximumWeight);
    }
    if (concurrencyLevel != null) {
        builder.concurrencyLevel(concurrencyLevel);
    }
    if (weakKeys) {
        builder.weakKeys();
    }

    if (weakValues) {
    }
    builder.weakValues();
    if (softValues) {
        builder.softValues();
    }

    if (expireAfterWriteDuration != null) {
        builder.expireAfterWrite(expireAfterWriteDuration, expireAfterWriteTimeUnit);
    }
    if (expireAfterAccessDuration != null) {
        builder.expireAfterAccess(expireAfterAccessDuration, expireAfterAccessTimeUnit);
    }
    if (refreshAfterWriteDuration != null) {
        builder.refreshAfterWrite(refreshAfterWriteDuration, refreshAfterWriteTimeUnit);
    }

    if (ticker != null) {
        builder.ticker(ticker);
    }

    if (removalListener != null) {
        builder.removalListener(removalListener);
    }

    if (recordStats) {
        builder.recordStats();
    }
    return builder;
}

From source file:org.wso2.andes.store.cache.GuavaBasedMessageCacheImpl.java

public GuavaBasedMessageCacheImpl() {

    DEFAULT_CONTENT_CHUNK_SIZE = AndesConfigurationManager
            .readValue(AndesConfiguration.PERFORMANCE_TUNING_MAX_CONTENT_CHUNK_SIZE);

    long cacheSizeInBytes = 1024L * 1024L
            * ((int) AndesConfigurationManager.readValue(AndesConfiguration.PERSISTENCE_CACHE_SIZE));

    int cacheConcurrency = AndesConfigurationManager
            .readValue(AndesConfiguration.PERSISTENCE_CACHE_CONCURRENCY_LEVEL);

    int cacheExpirySeconds = AndesConfigurationManager
            .readValue(AndesConfiguration.PERSISTENCE_CACHE_EXPIRY_SECONDS);

    String valueRefType = AndesConfigurationManager
            .readValue(AndesConfiguration.PERSISTENCE_CACHE_VALUE_REFERENCE_TYPE);
    printStats = AndesConfigurationManager.readValue(AndesConfiguration.PERSISTENCE_CACHE_PRINT_STATS);

    CacheBuilder<Long, AndesMessage> builder = CacheBuilder.newBuilder().concurrencyLevel(cacheConcurrency)
            .expireAfterAccess(cacheExpirySeconds, TimeUnit.SECONDS).maximumWeight(cacheSizeInBytes)
            .weigher(new Weigher<Long, AndesMessage>() {
                @Override/*from w ww. j a  va 2s.  c o  m*/
                public int weigh(Long l, AndesMessage m) {
                    return m.getMetadata().getMessageContentLength();
                }
            });

    if (printStats) {
        builder = builder.recordStats();
    }

    if (CACHE_VALUE_REF_TYPE_WEAK.equalsIgnoreCase(valueRefType)) {
        builder = builder.weakValues();
    }

    this.cache = builder.build();

    maintenanceExecutor = Executors.newSingleThreadScheduledExecutor();

    maintenanceExecutor.scheduleAtFixedRate(new Runnable() {

        @Override
        public void run() {
            cache.cleanUp();

            if (printStats) {
                log.info("cache stats:" + cache.stats().toString());
            }

        }
    }, 2, 2, TimeUnit.MINUTES);

}

From source file:com.github.benmanes.caffeine.cache.testing.GuavaLocalCache.java

/** Returns a Guava-backed cache. */
@SuppressWarnings("CheckReturnValue")
public static <K, V> Cache<K, V> newGuavaCache(CacheContext context) {
    checkState(!context.isAsync(), "Guava caches are synchronous only");

    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();
    if (context.initialCapacity != InitialCapacity.DEFAULT) {
        builder.initialCapacity(context.initialCapacity.size());
    }//from   w  w  w . java  2 s.c o  m
    if (context.isRecordingStats()) {
        builder.recordStats();
    }
    if (context.maximumSize != MaximumSize.DISABLED) {
        if (context.weigher == CacheWeigher.DEFAULT) {
            builder.maximumSize(context.maximumSize.max());
        } else {
            builder.weigher(new GuavaWeigher<Object, Object>(context.weigher));
            builder.maximumWeight(context.maximumWeight());
        }
    }
    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()) {
        builder.ticker(context.ticker());
    }
    if (context.keyStrength == ReferenceType.WEAK) {
        builder.weakKeys();
    } else if (context.keyStrength == ReferenceType.SOFT) {
        throw new IllegalStateException();
    }
    if (context.valueStrength == ReferenceType.WEAK) {
        builder.weakValues();
    } else if (context.valueStrength == ReferenceType.SOFT) {
        builder.softValues();
    }
    if (context.removalListenerType != Listener.DEFAULT) {
        boolean translateZeroExpire = (context.afterAccess == Expire.IMMEDIATELY)
                || (context.afterWrite == Expire.IMMEDIATELY);
        builder.removalListener(new GuavaRemovalListener<>(translateZeroExpire, context.removalListener));
    }
    Ticker ticker = (context.ticker == null) ? Ticker.systemTicker() : context.ticker;
    if (context.loader == null) {
        context.cache = new GuavaCache<>(builder.<Integer, Integer>build(), ticker);
    } else if (context.loader().isBulk()) {
        context.cache = new GuavaLoadingCache<>(
                builder.build(new BulkLoader<Integer, Integer>(context.loader())), ticker);
    } else {
        context.cache = new GuavaLoadingCache<>(
                builder.build(new SingleLoader<Integer, Integer>(context.loader())), ticker);
    }
    @SuppressWarnings("unchecked")
    Cache<K, V> castedCache = (Cache<K, V>) context.cache;
    return castedCache;
}

From source file:com.github.benmanes.caffeine.cache.testing.GuavaCacheFromContext.java

/** Returns a Guava-backed cache. */
@SuppressWarnings("CheckReturnValue")
public static <K, V> Cache<K, V> newGuavaCache(CacheContext context) {
    checkState(!context.isAsync(), "Guava caches are synchronous only");

    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();
    context.guava = builder;/*from  w ww.  jav a2s. co m*/

    builder.concurrencyLevel(1);
    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(new GuavaWeigher<Object, Object>(context.weigher));
            builder.maximumWeight(context.maximumWeight());
        }
    }
    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()) {
        builder.ticker(context.ticker());
    }
    if (context.keyStrength == ReferenceType.WEAK) {
        builder.weakKeys();
    } else if (context.keyStrength == ReferenceType.SOFT) {
        throw new IllegalStateException();
    }
    if (context.valueStrength == ReferenceType.WEAK) {
        builder.weakValues();
    } else if (context.valueStrength == ReferenceType.SOFT) {
        builder.softValues();
    }
    if (context.removalListenerType != Listener.DEFAULT) {
        boolean translateZeroExpire = (context.afterAccess == Expire.IMMEDIATELY)
                || (context.afterWrite == Expire.IMMEDIATELY);
        builder.removalListener(new GuavaRemovalListener<>(translateZeroExpire, context.removalListener));
    }
    Ticker ticker = (context.ticker == null) ? Ticker.systemTicker() : context.ticker;
    if (context.loader == null) {
        context.cache = new GuavaCache<>(builder.<Integer, Integer>build(), ticker, context.isRecordingStats());
    } else if (context.loader().isBulk()) {
        context.cache = new GuavaLoadingCache<>(
                builder.build(new BulkLoader<Integer, Integer>(context.loader())), ticker,
                context.isRecordingStats());
    } else {
        context.cache = new GuavaLoadingCache<>(
                builder.build(new SingleLoader<Integer, Integer>(context.loader())), ticker,
                context.isRecordingStats());
    }
    @SuppressWarnings("unchecked")
    Cache<K, V> castedCache = (Cache<K, V>) context.cache;
    return castedCache;
}