import com.google.common.cache.CacheBuilderFactory.DurationSpec; //导入依赖的package包/类
private CacheBuilderFactory cacheFactory() {
  return new CacheBuilderFactory()
      .withKeyStrengths(ImmutableSet.of(Strength.STRONG, Strength.WEAK))
      .withValueStrengths(ImmutableSet.copyOf(Strength.values()))
      .withConcurrencyLevels(ImmutableSet.of(1, 4, 16, 64))
      .withMaximumSizes(ImmutableSet.of(0, 1, 10, 100, 1000))
      .withInitialCapacities(ImmutableSet.of(0, 1, 10, 100, 1000))
      .withExpireAfterWrites(ImmutableSet.of(
          DurationSpec.of(0, SECONDS),
          DurationSpec.of(1, SECONDS),
          DurationSpec.of(1, DAYS)))
      .withExpireAfterAccesses(ImmutableSet.of(
          DurationSpec.of(0, SECONDS),
          DurationSpec.of(1, SECONDS),
          DurationSpec.of(1, DAYS)))
      .withRefreshes(ImmutableSet.of(
          DurationSpec.of(1, SECONDS),
          DurationSpec.of(1, DAYS)));
}
 

import com.google.common.cache.CacheBuilderFactory.DurationSpec; //导入依赖的package包/类
private CacheBuilderFactory cacheFactory() {
  // This is trickier than expected. We plan to put 15 values in each of these (WARMUP_MIN to
  // WARMUP_MAX), but the tests assume no values get evicted. Even with a maximumSize of 100, one
  // of the values gets evicted. With weak keys, we use identity equality, which means using
  // System.identityHashCode, which means the assignment of keys to segments is nondeterministic,
  // so more than (maximumSize / #segments) keys could get assigned to the same segment, which
  // would cause one to be evicted.
  return new CacheBuilderFactory()
      .withKeyStrengths(ImmutableSet.of(Strength.STRONG, Strength.WEAK))
      .withValueStrengths(ImmutableSet.copyOf(Strength.values()))
      .withConcurrencyLevels(ImmutableSet.of(1, 4, 16, 64))
      .withMaximumSizes(ImmutableSet.of(400, 1000))
      .withInitialCapacities(ImmutableSet.of(0, 1, 10, 100, 1000))
      .withExpireAfterWrites(ImmutableSet.of(
          // DurationSpec.of(500, MILLISECONDS),
          DurationSpec.of(1, SECONDS),
          DurationSpec.of(1, DAYS)))
      .withExpireAfterAccesses(ImmutableSet.of(
          // DurationSpec.of(500, MILLISECONDS),
          DurationSpec.of(1, SECONDS),
          DurationSpec.of(1, DAYS)))
      .withRefreshes(ImmutableSet.of(
          // DurationSpec.of(500, MILLISECONDS),
          DurationSpec.of(1, SECONDS),
          DurationSpec.of(1, DAYS)));
}
 

import com.google.common.cache.CacheBuilderFactory.DurationSpec; //导入依赖的package包/类
private CacheBuilderFactory cacheFactory() {
  // This is trickier than expected. We plan to put 15 values in each of these (WARMUP_MIN to
  // WARMUP_MAX), but the tests assume no values get evicted. Even with a maximumSize of 100, one
  // of the values gets evicted. With weak keys, we use identity equality, which means using
  // System.identityHashCode, which means the assignment of keys to segments is nondeterministic,
  // so more than (maximumSize / #segments) keys could get assigned to the same segment, which
  // would cause one to be evicted.
  return new CacheBuilderFactory()
      .withKeyStrengths(ImmutableSet.of(Strength.STRONG, Strength.WEAK))
      .withValueStrengths(ImmutableSet.copyOf(Strength.values()))
      .withConcurrencyLevels(ImmutableSet.of(1, 4, 16, 64))
      .withMaximumSizes(ImmutableSet.of(400, 1000))
      .withInitialCapacities(ImmutableSet.of(0, 1, 10, 100, 1000))
      .withExpireAfterWrites(
          ImmutableSet.of(
              // DurationSpec.of(500, MILLISECONDS),
              DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)))
      .withExpireAfterAccesses(
          ImmutableSet.of(
              // DurationSpec.of(500, MILLISECONDS),
              DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)))
      .withRefreshes(
          ImmutableSet.of(
              // DurationSpec.of(500, MILLISECONDS),
              DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)));
}
 

import com.google.common.cache.CacheBuilderFactory.DurationSpec; //导入依赖的package包/类
private CacheBuilderFactory cacheFactory() {
  return new CacheBuilderFactory()
      .withKeyStrengths(ImmutableSet.of(Strength.STRONG, Strength.WEAK))
      .withValueStrengths(ImmutableSet.copyOf(Strength.values()))
      .withConcurrencyLevels(ImmutableSet.of(1, 4, 16, 64))
      .withMaximumSizes(ImmutableSet.of(0, 1, 10, 100, 1000))
      .withInitialCapacities(ImmutableSet.of(0, 1, 10, 100, 1000))
      .withExpireAfterWrites(
          ImmutableSet.of(
              DurationSpec.of(0, SECONDS), DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)))
      .withExpireAfterAccesses(
          ImmutableSet.of(
              DurationSpec.of(0, SECONDS), DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)))
      .withRefreshes(ImmutableSet.of(DurationSpec.of(1, SECONDS), DurationSpec.of(1, DAYS)));
}