com.github.benmanes.caffeine.cache.Caffeine.softValues()方法的使用及代码示例

x33g5p2x  于2022-01-18 转载在 其他  
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本文整理了Java中com.github.benmanes.caffeine.cache.Caffeine.softValues()方法的一些代码示例，展示了Caffeine.softValues()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Caffeine.softValues()方法的具体详情如下：
包路径：com.github.benmanes.caffeine.cache.Caffeine
类名称：Caffeine
方法名：softValues

Caffeine.softValues介绍

[英]Specifies that each value (not key) stored in the cache should be wrapped in a SoftReference (by default, strong references are used). Softly-referenced objects will be garbage-collected in a globally least-recently-used manner, in response to memory demand.

Warning: in most circumstances it is better to set a per-cache #maximumSize(long) instead of using soft references. You should only use this method if you are very familiar with the practical consequences of soft references.

Note: when this method is used, the resulting cache will use identity ( ==) comparison to determine equality of values.

Entries with values that have been garbage collected may be counted in Cache#estimatedSize(), but will never be visible to read or write operations; such entries are cleaned up as part of the routine maintenance described in the class javadoc.

This feature cannot be used in conjunction with #buildAsync.
[中]指定缓存中存储的每个值（非键）都应包装在SoftReference中（默认情况下，使用强引用）。软引用对象将以全局最近最少使用的方式进行垃圾收集，以响应内存需求。
警告：在大多数情况下，最好设置每个缓存的最大大小（long），而不是使用软引用。只有当您非常熟悉软引用的实际后果时，才应该使用此方法。
注意：使用此方法时，生成的缓存将使用标识（=）比较来确定值的相等性。
具有已被垃圾收集的值的条目可能会在缓存#estimatedSize（）中计数，但对读或写操作永远不会可见；这些条目作为javadoc类中描述的日常维护的一部分进行清理。
此功能不能与#buildAsync结合使用。

代码示例

代码示例来源：origin: ben-manes/caffeine

@Test(expectedExceptions = IllegalStateException.class)
public void softValues_twice() {
 Caffeine.newBuilder().softValues().softValues();
}

代码示例来源：origin: ben-manes/caffeine

@Test(expectedExceptions = IllegalStateException.class)
public void async_softValues() {
 Caffeine.newBuilder().softValues().buildAsync(loader);
}

代码示例来源：origin: ben-manes/caffeine

@Test
public void softValues() {
 Caffeine.newBuilder().softValues().build();
}

代码示例来源：origin: ben-manes/caffeine

@GwtIncompatible("weakValues")
public void testValueStrengthSetTwice() {
 Caffeine<Object, Object> builder1 = Caffeine.newBuilder().weakValues();
 try {
  builder1.weakValues();
  fail();
 } catch (IllegalStateException expected) {}
 try {
  builder1.softValues();
  fail();
 } catch (IllegalStateException expected) {}
 Caffeine<Object, Object> builder2 = Caffeine.newBuilder().softValues();
 try {
  builder2.softValues();
  fail();
 } catch (IllegalStateException expected) {}
 try {
  builder2.weakValues();
  fail();
 } catch (IllegalStateException expected) {}
}

代码示例来源：origin: ben-manes/caffeine

builder.weakValues();
} else if (valueStrength == Strength.SOFT) {
 builder.softValues();
} else {
 throw new IllegalStateException();

代码示例来源：origin: ben-manes/caffeine

builder.weakValues();
} else if (valueStrength == Strength.SOFT) {
 builder.softValues();

代码示例来源：origin: ben-manes/caffeine

builder.softValues();

代码示例来源：origin: ben-manes/caffeine

public void testParse_softValues() {
 CaffeineSpec spec = parse("softValues");
 assertEquals(spec.initialCapacity, UNSET_INT);
 assertEquals(spec.maximumSize, UNSET_INT);
 assertEquals(spec.maximumWeight, UNSET_INT);
 assertNull(spec.keyStrength);
 assertEquals(Strength.SOFT, spec.valueStrength);
 assertNull(spec.expireAfterWriteTimeUnit);
 assertNull(spec.expireAfterAccessTimeUnit);
 assertNull(spec.refreshAfterWriteTimeUnit);
 assertCaffeineEquivalence(
   Caffeine.newBuilder().softValues(), Caffeine.from(spec));
}

代码示例来源：origin: ben-manes/caffeine

public void testParse_whitespaceAllowed() {
 CaffeineSpec spec = parse(" initialCapacity=10,\nmaximumSize=20,\t\r"
   + "weakKeys \t ,softValues \n , \r  expireAfterWrite \t =  15s\n\n");
 assertEquals(10, spec.initialCapacity);
 assertEquals(20, spec.maximumSize);
 assertEquals(spec.maximumWeight, UNSET_INT);
 assertEquals(Strength.WEAK, spec.keyStrength);
 assertEquals(Strength.SOFT, spec.valueStrength);
 assertEquals(TimeUnit.SECONDS, spec.expireAfterWriteTimeUnit);
 assertEquals(15L, spec.expireAfterWriteDuration);
 assertNull(spec.expireAfterAccessTimeUnit);
 Caffeine<?, ?> expected = Caffeine.newBuilder()
   .initialCapacity(10)
   .maximumSize(20)
   .weakKeys()
   .softValues()
   .expireAfterWrite(15L, TimeUnit.SECONDS);
 assertCaffeineEquivalence(expected, Caffeine.from(spec));
}

代码示例来源：origin: ben-manes/caffeine

builder.weakValues();
} else if (context.isSoftValues()) {
 builder.softValues();

代码示例来源：origin: com.github.ben-manes.caffeine/caffeine

builder.weakValues();
} else if (valueStrength == Strength.SOFT) {
 builder.softValues();
} else {
 throw new IllegalStateException();

代码示例来源：origin: com.github.ben-manes.caffeine/caffeine

builder.softValues();

代码示例来源：origin: owlcs/owlapi

static <Q, T> LoadingCache<Q, T> build(CacheLoader<Q, T> c) {
  return Caffeine.newBuilder().weakKeys().softValues().build(c);
}

代码示例来源：origin: net.sourceforge.owlapi/owlapi-impl

static <Q, T> LoadingCache<Q, T> build(CacheLoader<Q, T> c) {
  return Caffeine.newBuilder().weakKeys().softValues().build(c);
}

代码示例来源：origin: net.sourceforge.owlapi/owlapi-distribution

static <Q, T> LoadingCache<Q, T> build(CacheLoader<Q, T> c) {
  return Caffeine.newBuilder().weakKeys().softValues().build(c);
}

代码示例来源：origin: net.sourceforge.owlapi/owlapi-osgidistribution

static <Q, T> LoadingCache<Q, T> build(CacheLoader<Q, T> c) {
  return Caffeine.newBuilder().weakKeys().softValues().build(c);
}

代码示例来源：origin: fr.inria.atlanmod.neoemf/neoemf-data-blueprints-core

/**
 * Constructs a new {@code BlueprintsPersistenceBackend} wrapping the provided {@code baseGraph}.
 * <p>
 * This constructor initialize the caches and create the metaclass index.
 * <p>
 * This constructor is protected. To create a new {@code BlueprintsPersistenceBackend} use {@link
 * BlueprintsPersistenceBackendFactory#createPersistentBackend(java.io.File, Map)}.
 *
 * @param baseGraph the base {@link KeyIndexableGraph} used to access the database
 *
 * @see BlueprintsPersistenceBackendFactory
 */
protected BlueprintsPersistenceBackend(KeyIndexableGraph baseGraph) {
  this.graph = new AutoCleanerIdGraph(baseGraph);
  this.persistentObjectsCache = Caffeine.newBuilder().softValues().build();
  this.verticesCache = Caffeine.newBuilder().softValues().build();
  this.indexedEClasses = new ArrayList<>();
  Index<Vertex> metaclasses = graph.getIndex(KEY_METACLASSES, Vertex.class);
  if (isNull(metaclasses)) {
    metaclassIndex = graph.createIndex(KEY_METACLASSES, Vertex.class);
  }
  else {
    metaclassIndex = metaclasses;
  }
}

代码示例来源：origin: locationtech/geogig

CaffeineSharedCache(final int L1Capacity, Cache<CacheKey, byte[]> byteCache,
    SizeTracker sizeTracker) {
  this.L2Cache = byteCache;
  this.sizeTracker = sizeTracker;
  RemovalListener<CacheKey, RevObject> L1WriteBack = (key, value, cause) -> {
    if (RemovalCause.SIZE == cause && value != null) {
      putInternal(key, value);
    }
  };
  this.L1Cache = Caffeine.newBuilder()//
      .maximumSize(L1Capacity)//
      .softValues()//
      .removalListener(L1WriteBack)//
      .build();
}

代码示例来源：origin: com.epam.reportportal/commons-dao

.newBuilder()
  .maximumSize(ticketCacheSize)
  .softValues()
  .expireAfterAccess(ticketCacheExpiration, TimeUnit.MINUTES)
.build());
.newBuilder()
  .maximumSize(projectCacheSize)
  .softValues()
  .expireAfterAccess(projectCacheExpiration, TimeUnit.DAYS)
.build());
.newBuilder()
  .maximumSize(projectCacheSize)
  .softValues()
  .expireAfterWrite(projectInfoCacheExpiration, TimeUnit.MINUTES)
.build());

代码示例来源：origin: com.buschmais.jqassistant.plugin/java

/**
 * Constructor.
 */
TypeCache() {
  this.lruCache = Caffeine.newBuilder().maximumSize(8192).removalListener((RemovalListener<String, CachedType>) (key, value, cause) -> {
    if (RemovalCause.SIZE.equals(cause)) {
      softCache.put(key, value);
    }
  }).build();
  this.softCache = Caffeine.newBuilder().softValues().build();
}

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