* the License.
 */

package com.google.common.cache;

import com.google.common.annotations.GwtCompatible;

/**
 * Calculates the weights of cache entries.
 *
 * @author Charles Fry
 * @since 11.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public interface Weigher<K, V> {

  /**
   * Returns the weight of a cache entry. There is no unit for entry weights; rather they are simply

 * in terms of {@link #invalidate}. The method {@link #cleanUp} is a no-op. All other methods throw
 * an {@link UnsupportedOperationException}.
 *
 * @author Charles Fry
 * @since 11.0
 */
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public abstract class AbstractLoadingCache<K, V> extends AbstractCache<K, V>
    implements LoadingCache<K, V> {

 * in terms of {@link #invalidate}. The method {@link #cleanUp} is a no-op. All other methods throw
 * an {@link UnsupportedOperationException}.
 *
 * @author Charles Fry
 * @since 11.0
 */
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public abstract class AbstractLoadingCache<K, V> extends AbstractCache<K, V>
    implements LoadingCache<K, V> {

 *
 * <p>Note that {@link #get}, {@link #getUnchecked}, and {@link #apply} all expose the same
 * underlying functionality, so should probably be overridden as a group.
 *
 * @author Charles Fry
 * @since 11.0
 */
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public abstract class ForwardingLoadingCache<K, V> extends ForwardingCache<K, V>
    implements LoadingCache<K, V> {

import java.util.concurrent.Executor;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicInteger;
import junit.framework.TestCase;

/**
 * Unit tests for {@link CacheLoader}.
 *
 * @author Charles Fry
 */
public class CacheLoaderTest extends TestCase {

  private static class QueuingExecutor implements Executor {
    private final Deque<Runnable> tasks = Queues.newArrayDeque();

    @Override

import com.google.common.collect.ImmutableMap;
import java.util.concurrent.ExecutionException;
import junit.framework.TestCase;

/**
 * Unit test for {@link ForwardingLoadingCache}.
 *
 * @author Charles Fry
 */
public class ForwardingLoadingCacheTest extends TestCase {
  private LoadingCache<String, Boolean> forward;
  private LoadingCache<String, Boolean> mock;

  @SuppressWarnings({"unchecked", "DoNotMock"}) // mock

import com.google.common.cache.TestingCacheLoaders.IncrementingLoader;
import com.google.common.testing.FakeTicker;
import junit.framework.TestCase;

/**
 * Tests relating to automatic cache refreshing.
 *
 * @author Charles Fry
 */
public class CacheRefreshTest extends TestCase {
  public void testAutoRefresh() {
    FakeTicker ticker = new FakeTicker();
    IncrementingLoader loader = incrementingLoader();

import com.google.common.primitives.Ints;
import java.util.Random;
import java.util.concurrent.atomic.AtomicLong;

/**
 * Single-threaded benchmark for {@link LoadingCache}.
 *
 * @author Charles Fry
 */
public class LoadingCacheSingleThreadBenchmark {
  @Param({"1000", "2000"})
  int maximumSize;

  @Param("5000")
  int distinctKeys;

  @Param("4")
  int segments;

 * to return a value with a GWT serializable type.
 *
 * <p>Note that a {@code GwtCompatible} type may have some {@link GwtIncompatible} methods.
 *
 * @author Charles Fry
 * @author Hayward Chan
 */
@Retention(RetentionPolicy.CLASS)
@Target({ElementType.TYPE, ElementType.METHOD})
@Documented
@GwtCompatible
public @interface GwtCompatible {

  /**

import java.util.concurrent.atomic.AtomicReference;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Unit test for {@link AbstractLoadingCache}.
 *
 * @author Charles Fry
 */
public class AbstractLoadingCacheTest extends TestCase {

  public void testGetUnchecked_checked() {
    final Exception cause = new Exception();