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

Introduction

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

Prototype

Weigher

Source Link

Usage

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

public static Weigher<Object, Weighted> fixedWeightKeys(final int keyWeight) {
    return new Weigher<Object, Weighted>() {
        @Override/*from w ww . jav  a2 s.c  o  m*/
        public int weigh(Object key, Weighted value) {
            return (int) Math.min(keyWeight + value.getWeight(), Integer.MAX_VALUE);
        }
    };
}

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

public static Weigher<Weighted, Weighted> weightedKeysAndValues() {
    return new Weigher<Weighted, Weighted>() {
        @Override//from   w  w  w.java  2s.  c  o  m
        public int weigh(Weighted key, Weighted value) {
            return (int) Math.min(key.getWeight() + value.getWeight(), Integer.MAX_VALUE);
        }
    };
}

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From source file:com.google.gitiles.blame.BlameCacheImpl.java

public static CacheBuilder<Key, List<Region>> weigher(CacheBuilder<? super Key, ? super List<Region>> builder) {
    return builder.weigher(new Weigher<Key, List<Region>>() {
        @Override/* w  w w .j  a va  2s .c o  m*/
        public int weigh(Key key, List<Region> value) {
            return value.size();
        }
    });
}

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From source file:org.nickelproject.nickel.blobStore.CachingBlobStore.java

@Inject
public CachingBlobStore(final BlobStore blobStore, final CacheBuilderSpec cacheBuilderSpec) {
    this.blobStore = blobStore;
    this.cache = CacheBuilder.from(cacheBuilderSpec).weigher(new Weigher<BlobRef, byte[]>() {
        @Override//from  w w  w . j a v  a 2 s. co  m
        public int weigh(final BlobRef key, final byte[] value) {
            return value.length;
        }
    }).build(new CacheLoader<BlobRef, byte[]>() {
        @Override
        public byte[] load(final BlobRef key) throws Exception {
            return blobStore.get(key);
        }
    });
}

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From source file:com.facebook.presto.rakam.cache.HeapOrcDataSourceFactory.java

@Inject
public HeapOrcDataSourceFactory(CacheConfig config) {
    cache = CacheBuilder.newBuilder().maximumWeight(config.getDataSize().toBytes())
            .weigher(new Weigher<FileRegion, byte[]>() {
                @Override//from   ww w  .j  a v a2 s  .c o m
                public int weigh(FileRegion key, byte[] value) {
                    return value.length;
                }
            }).build(new CacheLoader<FileRegion, byte[]>() {
                public byte[] load(FileRegion key) throws IOException {
                    if (!key.file.exists()) {
                        throw new FileNotFoundException(key.file.toString());
                    }

                    try (RandomAccessFile randomAccessFile = new RandomAccessFile(key.file, "r")) {
                        byte[] bytes = new byte[key.length];
                        randomAccessFile.seek(key.position);
                        randomAccessFile.read(bytes);
                        return bytes;
                    }
                }
            });
}

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From source file:org.nickelproject.nickel.objectStore.CachingObjectStore.java

@Inject
public CachingObjectStore(final BlobStore bStore, final CacheBuilderSpec cacheBuilderSpec) {
    this.blobStore = bStore;
    this.cache = CacheBuilder.from(cacheBuilderSpec).weigher(new Weigher<BlobRef, Pair<Integer, Object>>() {
        @Override/*from   www .jav  a 2  s.c o  m*/
        public int weigh(final BlobRef key, final Pair<Integer, Object> value) {
            return value.getA();
        }
    }).build(new CacheLoader<BlobRef, Pair<Integer, Object>>() {
        @Override
        public Pair<Integer, Object> load(final BlobRef key) throws Exception {
            final byte[] bytes = blobStore.get(key);
            if (bytes == null) {
                throw new RuntimeException("Unable to load for key: " + key);
            } else {
                return Pair.of(bytes.length, SerializationUtils.deserialize(bytes));
            }
        }
    });
}

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From source file:com.addthis.hydra.job.store.CachedSpawnDataStore.java

public CachedSpawnDataStore(SpawnDataStore dataStore, long dataStoreCacheSize) {
    this.dataStore = dataStore;
    this.cache = CacheBuilder.newBuilder().weigher(new Weigher<Pair<String, String>, String>() {
        @Override//from  w ww. ja v a2  s. c  om
        public int weigh(Pair<String, String> key, String value) {
            int leftWeight = key.getLeft() != null ? key.getLeft().length() : 0;

            int rightWeight = key.getRight() != null ? key.getRight().length() : 0;

            // Multiply strlen by 2 (full width characters in java
            return 2 * (value.length() + leftWeight + rightWeight);
        }
    }).maximumWeight(dataStoreCacheSize).build(new CacheLoader<Pair<String, String>, String>() {
        @Override
        public String load(Pair<String, String> key) throws Exception {
            String path = key.getLeft();
            String childId = key.getRight();

            if (childId == null) {
                return CachedSpawnDataStore.this.dataStore.get(path);
            } else {
                return CachedSpawnDataStore.this.dataStore.getChild(path, childId);
            }
        }
    });
}

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From source file:com.facebook.presto.rakam.cache.MemoryMappedOrcDataSourceFactory.java

@Inject
public MemoryMappedOrcDataSourceFactory(CacheConfig config) {
    cache = CacheBuilder.newBuilder().maximumWeight(config.getDataSize().toBytes())
            .weigher(new Weigher<FileRegion, Slice>() {
                @Override//  www .  j  ava  2  s  .  c  o m
                public int weigh(FileRegion key, Slice value) {
                    return value.length();
                }
            }).build(new CacheLoader<FileRegion, Slice>() {
                public Slice load(FileRegion key) throws IOException {
                    if (!key.file.exists()) {
                        throw new FileNotFoundException(key.file.toString());
                    }

                    try (RandomAccessFile randomAccessFile = new RandomAccessFile(key.file, "r");
                            FileChannel channel = randomAccessFile.getChannel()) {
                        MappedByteBuffer byteBuffer = channel.map(FileChannel.MapMode.READ_ONLY, key.position,
                                key.length);
                        return Slices.wrappedBuffer(byteBuffer);
                    }
                }
            });
}

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From source file:com.mellowtech.core.cache.CacheLRUMemory.java

@Override
protected LoadingCache<K, CacheValue<V>> buildCache() {

    Weigher<K, CacheValue<V>> weighter = new Weigher<K, CacheValue<V>>() {
        @Override/*from  ww w  .j  ava 2 s  . c om*/
        public int weigh(K key, CacheValue<V> value) {
            return key.byteSize() + value.getValue().byteSize();
        }
    };

    RemovalListener<K, CacheValue<V>> removalListener = this.getRemoveListener();
    CacheLoader<K, CacheValue<V>> cacheLoader = this.getCacheLoader();

    if (removalListener != null) {
        return CacheBuilder.newBuilder().maximumWeight(maxSize()).weigher(weighter)
                .removalListener(removalListener).build(cacheLoader);
    } else
        return CacheBuilder.newBuilder().maximumWeight(maxSize()).weigher(weighter).build(cacheLoader);
}

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From source file:com.mellowtech.core.cache.CacheLRUMemoryMapping.java

@Override
protected LoadingCache<K, CacheValue<V>> buildCache() {

    Weigher<K, CacheValue<V>> weighter = new Weigher<K, CacheValue<V>>() {
        @Override/*w w  w .  j  a  v a2 s .c o  m*/
        public int weigh(K key, CacheValue<V> value) {
            return keyMapping.byteSize(key) + valueMapping.byteSize(value.getValue());
        }
    };

    RemovalListener<K, CacheValue<V>> removalListener = this.getRemoveListener();
    CacheLoader<K, CacheValue<V>> cacheLoader = this.getCacheLoader();

    if (removalListener != null) {
        return CacheBuilder.newBuilder().maximumWeight(maxSize()).weigher(weighter)
                .removalListener(removalListener).build(cacheLoader);
    } else
        return CacheBuilder.newBuilder().maximumWeight(maxSize()).weigher(weighter).build(cacheLoader);
}

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