javax.cache.Cache.get()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javax.cache.Cache.get()方法的一些代码示例，展示了Cache.get()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。Cache.get()方法的具体详情如下：
包路径：javax.cache.Cache
类名称：Cache
方法名：get

Cache.get介绍

[英]Gets an entry from the cache.

If the cache is configured to use read-through, and get would return null because the entry is missing from the cache, the Cache's CacheLoaderis called in an attempt to load the entry.
[中]从缓存中获取一个条目。
如果缓存配置为使用读通，get将返回null，因为缓存中缺少该项，则会调用缓存的CacheLoader以尝试加载该项。

代码示例

代码示例来源：origin: apache/incubator-dubbo

@Override
public Object get(Object key) {
  return store.get(key);
}

代码示例来源：origin: apache/incubator-dubbo

@Override
public Object get(Object key) {
  return store.get(key);
}

代码示例来源：origin: spring-projects/spring-framework

@Override
@Nullable
protected Object lookup(Object key) {
  return this.cache.get(key);
}

代码示例来源：origin: hibernate/hibernate-orm

@Override
public Object getFromCache(Object key, SharedSessionContractImplementor session) {
  return underlyingCache.get( key );
}

代码示例来源：origin: org.springframework/spring-context-support

@Override
@Nullable
protected Object lookup(Object key) {
  return this.cache.get(key);
}

代码示例来源：origin: ehcache/ehcache3

@Test
public void test_getCacheMisses() throws Exception {
 heapCache.get("key");
 heapCache.get("key");
 heapCache.get("key");
 heapCache.get("key");
 heapCache.get("key");
 assertThat(heapStatistics.getCacheMisses(), is(5L));
}

代码示例来源：origin: requery/requery

@Override
public <T> T get(Class<T> type, Object key) {
  Cache cache = getCache(type);
  if (cache != null && cache.isClosed()) {
    cache = null;
  }
  if (cache != null) {
    SerializedEntity container = (SerializedEntity) cache.get(key);
    if (container != null) {
      return type.cast(container.getEntity());
    }
  }
  return null;
}

代码示例来源：origin: ehcache/ehcache3

@Test
public void test_getCacheHitPercentage() throws Exception {
 heapCache.put("key", "value");
 heapCache.get("key");
 heapCache.get("key");
 heapCache.get("key");
 heapCache.get("nokey");
 heapCache.get("nokey");
 assertThat(heapStatistics.getCacheHitPercentage(), is(allOf(greaterThan(59f), lessThan(61f))));
}

代码示例来源：origin: ben-manes/caffeine

public void start() {
 for (Integer i = 0; i < KEYS; i++) {
  cache.put(i, Boolean.TRUE);
 }
 Runnable task = () -> {
  for (int i = random.nextInt(); ; i++) {
   Integer key = Math.abs(i % KEYS);
   if (READ) {
    requireNonNull(cache.get(key));
   } else {
    cache.put(key, Boolean.TRUE);
   }
   count.increment();
  }
 };
 scheduleStatusTask();
 for (int i = 0; i < THREADS; i++) {
  executor.execute(task);
 }
}

代码示例来源：origin: ben-manes/caffeine

@Test
 public void sanity() {
  CachingProvider cachingProvider = Caching.getCachingProvider(
    "com.github.benmanes.caffeine.jcache.spi.CaffeineCachingProvider",
    getClass().getClassLoader());
  Cache<String, Integer> cache = cachingProvider.getCacheManager()
    .getCache("test-cache-2", String.class, Integer.class);
  assertNull(cache.get("a"));
 }
}

代码示例来源：origin: ehcache/ehcache3

@Test
public void testSimplePutIfAbsentWithLoaderAndWriter_existsInSor() throws Exception {
 assertThat(testCache.containsKey(1), is(false));
 assertThat(testCache.putIfAbsent(1, "one"), is(true));
 assertThat(testCache.get(1), Matchers.<CharSequence>equalTo("one"));
 verifyZeroInteractions(cacheLoader);
 verify(cacheWriter, times(1)).write(eq(new Eh107CacheLoaderWriter.Entry<Number, CharSequence>(1, "one")));
}

代码示例来源：origin: ehcache/ehcache3

@Test
public void testSimplePutIfAbsentWithLoaderAndWriter_absent() throws Exception {
 assertThat(testCache.containsKey(1), is(false));
 assertThat(testCache.putIfAbsent(1, "one"), is(true));
 assertThat(testCache.get(1), Matchers.<CharSequence>equalTo("one"));
 verify(cacheLoader).load(1);
 verify(cacheWriter, times(1)).write(eq(new Eh107CacheLoaderWriter.Entry<Number, CharSequence>(1, "one")));
}

代码示例来源：origin: ehcache/ehcache3

@Test
public void testJSR107DefaultSerializer() throws URISyntaxException {
 Cache<Long, String> cache = cacheManager.getCache("cache", Long.class, String.class);
 cache.put(19L, "foo");
 assertThat(cache.get(19L), equalTo("foo"));
}

代码示例来源：origin: ehcache/ehcache3

@Test
 public void testJSR107Serializer() {
  Cache<Long, String> cache1 = cacheManager.getCache("cache1", Long.class, String.class);
  cache1.put(17L, "foo");
  assertThat(cache1.get(17L), equalTo("foo"));
 }
}

代码示例来源：origin: resilience4j/resilience4j

@SuppressWarnings("unchecked")
@Test
public void testDecorateSupplierWithCache() {
  javax.cache.Cache<String, String> cache = mock(javax.cache.Cache.class);
  // Given the cache contains the key
  given(cache.containsKey("testKey")).willReturn(true);
  // Return the value from cache
  given(cache.get("testKey")).willReturn("Hello from cache");
  Function<String, String> cachedFunction = Decorators.ofSupplier(() -> "Hello world")
    .withCache(Cache.of(cache))
    .decorate();
  String value = cachedFunction.apply("testKey");
  assertThat(value).isEqualTo("Hello from cache");
}

代码示例来源：origin: resilience4j/resilience4j

@Test
public void shouldConsumeOnCacheMissEvent() throws Throwable {
  // Given the cache does not contain the key
  given(cache.get("testKey")).willReturn(null);
  Cache<String, String> cacheContext = Cache.of(cache);
  cacheContext.getEventPublisher().onCacheMiss(event ->
      logger.info(event.getEventType().toString()));
  CheckedFunction1<String, String> cachedFunction = Cache.decorateCheckedSupplier(cacheContext, () -> "Hello world");
  String value = cachedFunction.apply("testKey");
  assertThat(value).isEqualTo("Hello world");
  then(logger).should(times(1)).info("CACHE_MISS");
}

代码示例来源：origin: resilience4j/resilience4j

@Test
public void shouldConsumeOnCacheHitEvent() throws Throwable {
  // Given the cache does not contain the key
  given(cache.get("testKey")).willReturn("Hello world");
  Cache<String, String> cacheContext = Cache.of(cache);
  cacheContext.getEventPublisher().onCacheHit(event ->
      logger.info(event.getEventType().toString()));
  CheckedFunction1<String, String> cachedFunction = Cache.decorateCheckedSupplier(cacheContext, () -> "Hello world");
  String value = cachedFunction.apply("testKey");
  assertThat(value).isEqualTo("Hello world");
  then(logger).should(times(1)).info("CACHE_HIT");
}

代码示例来源：origin: resilience4j/resilience4j

@Test
public void shouldConsumeOnErrorEvent() throws Throwable {
  // Given the cache does not contain the key
  given(cache.get("testKey")).willThrow(new WebServiceException("BLA"));
  Cache<String, String> cacheContext = Cache.of(cache);
  cacheContext.getEventPublisher().onError(event ->
      logger.info(event.getEventType().toString()));
  CheckedFunction1<String, String> cachedFunction = Cache.decorateCheckedSupplier(cacheContext, () -> "Hello world");
  String value = cachedFunction.apply("testKey");
  assertThat(value).isEqualTo("Hello world");
  then(logger).should(times(1)).info("ERROR");
}

代码示例来源：origin: ehcache/ehcache3

@Test
 public void testBasicCacheOperation() throws IOException, URISyntaxException {
  Configuration config = new DefaultConfiguration(ResourceCombinationsTest.class.getClassLoader(),
      new DefaultPersistenceConfiguration(diskPath.newFolder()));
  try (CacheManager cacheManager = new EhcacheCachingProvider().getCacheManager(URI.create("dummy"), config)) {
   Cache<String, String> cache = cacheManager.createCache("test", fromEhcacheCacheConfiguration(
    newCacheConfigurationBuilder(String.class, String.class, resources)));
   cache.put("foo", "bar");
   assertThat(cache.get("foo"), is("bar"));
  }
 }
}

代码示例来源：origin: resilience4j/resilience4j

@SuppressWarnings("unchecked")
@Test
public void testDecorateCheckedSupplierWithCache() {
  javax.cache.Cache<String, String> cache = mock(javax.cache.Cache.class);
  // Given the cache contains the key
  given(cache.containsKey("testKey")).willReturn(true);
  // Return the value from cache
  given(cache.get("testKey")).willReturn("Hello from cache");
  CheckedFunction1<String, String> cachedFunction = Decorators.ofCheckedSupplier(() -> "Hello world")
    .withCache(Cache.of(cache))
    .decorate();
  String value = Try.of(() -> cachedFunction.apply("testKey")).get();
  assertThat(value).isEqualTo("Hello from cache");
}

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