Example usage for com.google.common.cache Weigher weigh

Introduction

In this page you can find the example usage for com.google.common.cache Weigher weigh.

Prototype

int weigh(K key, V value);

Source Link

Document

Returns the weight of a cache entry.

Usage

From source file:com.google.gerrit.server.cache.h2.DefaultCacheFactory.java

@SuppressWarnings("unchecked")
<K, V> CacheBuilder<K, V> create(CacheBinding<K, V> def, boolean unwrapValueHolder) {
    CacheBuilder<K, V> builder = newCacheBuilder();
    builder.recordStats();/*  w w  w  .j  a va2  s  .c om*/
    builder.maximumWeight(cfg.getLong("cache", def.name(), "memoryLimit", def.maximumWeight()));

    builder.removalListener(forwardingRemovalListenerFactory.create(def.name()));

    Weigher<K, V> weigher = def.weigher();
    if (weigher != null && unwrapValueHolder) {
        final Weigher<K, V> impl = weigher;
        weigher = (Weigher<K, V>) new Weigher<K, ValueHolder<V>>() {
            @Override
            public int weigh(K key, ValueHolder<V> value) {
                return impl.weigh(key, value.value);
            }
        };
    } else if (weigher == null) {
        weigher = unitWeight();
    }
    builder.weigher(weigher);

    Long age = def.expireAfterWrite(TimeUnit.SECONDS);
    if (has(def.name(), "maxAge")) {
        builder.expireAfterWrite(ConfigUtil.getTimeUnit(cfg, "cache", def.name(), "maxAge",
                age != null ? age : 0, TimeUnit.SECONDS), TimeUnit.SECONDS);
    } else if (age != null) {
        builder.expireAfterWrite(age, TimeUnit.SECONDS);
    }

    return builder;
}

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From source file:com.github.benmanes.multiway.TransferPool.java

/** Creates the denormalized cache of resources based on the builder configuration. */
Cache<ResourceKey<K>, R> __makeCache(MultiwayPoolBuilder<? super K, ? super R> builder) {
    CacheBuilder<Object, Object> cacheBuilder = CacheBuilder.newBuilder();
    if (builder.maximumSize != MultiwayPoolBuilder.UNSET_INT) {
        cacheBuilder.maximumSize(builder.maximumSize);
    }/*w w w.  ja  va  2s .  co  m*/
    if (builder.maximumWeight != MultiwayPoolBuilder.UNSET_INT) {
        cacheBuilder.maximumWeight(builder.maximumWeight);
    }
    if (builder.weigher != null) {
        final Weigher<? super K, ? super R> weigher = builder.weigher;
        cacheBuilder.weigher(new Weigher<ResourceKey<K>, R>() {
            @Override
            public int weigh(ResourceKey<K> resourceKey, R resource) {
                return weigher.weigh(resourceKey.getKey(), resource);
            }
        });
    }
    if (builder.expireAfterWriteNanos != MultiwayPoolBuilder.UNSET_INT) {
        cacheBuilder.expireAfterWrite(builder.expireAfterWriteNanos, TimeUnit.NANOSECONDS);
    }
    if (builder.ticker != null) {
        cacheBuilder.ticker(builder.ticker);
    }
    if (builder.recordStats) {
        cacheBuilder.recordStats();
    }
    cacheBuilder.concurrencyLevel(builder.getConcurrencyLevel());
    cacheBuilder.removalListener(new CacheRemovalListener());
    return cacheBuilder.build();
}

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From source file:com.google.cloud.dataflow.sdk.runners.worker.WindmillStateCache.java

public WindmillStateCache() {
    final Weigher<Weighted, Weighted> weigher = Weighers.weightedKeysAndValues();

    stateCache = CacheBuilder.newBuilder().maximumWeight(100000000 /* 100 MB */).recordStats().weigher(weigher)
            .removalListener(new RemovalListener<StateId, StateCacheEntry>() {
                @Override/*from w  ww. j  av  a 2  s  . c o  m*/
                public void onRemoval(RemovalNotification<StateId, StateCacheEntry> removal) {
                    if (removal.getCause() != RemovalCause.REPLACED) {
                        displayedWeight -= weigher.weigh(removal.getKey(), removal.getValue());
                    }
                }
            }).build();
}

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From source file:org.apache.beam.runners.dataflow.worker.WindmillStateCache.java

public WindmillStateCache() {
    final Weigher<Weighted, Weighted> weigher = Weighers.weightedKeysAndValues();

    stateCache = CacheBuilder.newBuilder().maximumWeight(100000000 /* 100 MB */).recordStats().weigher(weigher)
            .removalListener(removal -> {
                if (removal.getCause() != RemovalCause.REPLACED) {
                    synchronized (this) {
                        StateId id = (StateId) removal.getKey();
                        if (removal.getCause() != RemovalCause.EXPLICIT) {
                            // When we invalidate a key explicitly, we'll also update the keyIndex, so
                            // no need to do it here.
                            keyIndex.remove(id.getComputationKey(), id);
                        }//  w  w w. j  a  v  a  2 s.c om
                        displayedWeight -= weigher.weigh(id, removal.getValue());
                    }
                }
            }).build();
}

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