javax.cache.Cache.getAndPut()方法的使用及代码示例

x33g5p2x  于2022-01-18 转载在 其他  
字(8.1k)|赞(0)|评价(0)|浏览(117)

本文整理了Java中javax.cache.Cache.getAndPut()方法的一些代码示例，展示了Cache.getAndPut()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.getAndPut()方法的具体详情如下：
包路径：javax.cache.Cache
类名称：Cache
方法名：getAndPut

Cache.getAndPut介绍

[英]Associates the specified value with the specified key in this cache, returning an existing value if one existed.

If the cache previously contained a mapping for the key, the old value is replaced by the specified value. (A cache c is said to contain a mapping for a key k if and only if #containsKey(Object) would return true.)

The previous value is returned, or null if there was no value associated with the key previously.
[中]将指定值与此缓存中的指定键关联，如果存在，则返回现有值。
如果缓存以前包含键的映射，则旧值将替换为指定值。（缓存c被称为包含密钥k的映射，当且仅当#containsKey（Object）返回true。）
返回上一个值，如果以前没有与键关联的值，则返回null。

代码示例

代码示例来源：origin: ehcache/ehcache3

@Test
public void getAndPut() {
 expect(cache.getAndPut(1, "a")).isNull();
 changesOf(0, 1, 1, 0);
 cache.getAndPut(1, "b");
 changesOf(1, 0, 1, 0);
 cache.getAndPut(1, "b"); // again with the same value
 changesOf(1, 0, 1, 0);
}

代码示例来源：origin: org.apache.camel/camel-jcache

@Override
  void execute(Cache<Object, Object> cache, Exchange exchange) {
    exchange.getIn().setBody(
      cache.getAndPut(
        exchange.getIn().getHeader(JCacheConstants.KEY),
        exchange.getIn().getBody())
    );
  }
},

代码示例来源：origin: org.apache.camel/camel-jcache

@Override
public Exchange add(CamelContext camelContext, String key, Exchange exchange) {
  if (optimistic) {
    throw new UnsupportedOperationException();
  }
  LOG.trace("Adding an Exchange with ID {} for key {} in a thread-safe manner.", exchange.getExchangeId(), key);
  DefaultExchangeHolder newHolder = DefaultExchangeHolder.marshal(exchange, true, allowSerializedHeaders);
  DefaultExchangeHolder oldHolder = cache.getAndPut(key, newHolder);
  return unmarshallExchange(camelContext, oldHolder);
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_Existing_MutateValue() {
 long now = System.currentTimeMillis();
 Date existingKey = new Date(now);
 Date value1 = new Date(now);
 cache.getAndPut(existingKey, value1);
 Date value2 = new Date(now + 1);
 value1.setTime(now + 2);
 assertEquals(new Date(now), cache.getAndPut(existingKey, value2));
 value2.setTime(now + 3);
 assertEquals(new Date(now + 1), cache.get(existingKey));
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_Existing() {
 long now = System.currentTimeMillis();
 Date existingKey = new Date(now);
 Date value1 = new Date(now);
 cache.getAndPut(existingKey, value1);
 Date value2 = new Date(now + 1);
 assertSame(value1, cache.getAndPut(existingKey, value2));
 assertSame(value2, cache.get(existingKey));
}

代码示例来源：origin: org.infinispan/infinispan-core

private <K> void doGetAndPut(Supplier<K> keySupplier,
   Cache<K, String> readCache, Cache<K, String> writeCache) {
 K key = keySupplier.get();
 assertEquals(null, writeCache.getAndPut(key, "one"));
 assertEquals("one", writeCache.getAndPut(key, "uno"));
 assertEquals("uno", readCache.get(key));
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_NotThere() {
 if (cache == null) return;
 long now = System.currentTimeMillis();
 Date existingKey = new Date(now);
 Date existingValue = new Date(now);
 assertNull(cache.getAndPut(existingKey, existingValue));
 existingValue.setTime(now + 1);
 assertEquals(new Date(now), cache.get(existingKey));
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_Existing() throws Exception {
 Long existingKey = System.currentTimeMillis();
 String value1 = "value1";
 cache.getAndPut(existingKey, value1);
 String value2 = "value2";
 assertEquals(value1, cache.getAndPut(existingKey, value2));
 assertEquals(value2, cache.get(existingKey));
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_NullKey() throws Exception {
 try {
  cache.getAndPut(null, "");
  fail("should have thrown an exception - null key not allowed");
 } catch (NullPointerException e) {
  //good
 }
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_NullValue() throws Exception {
 try {
  cache.getAndPut(1L, null);
  fail("should have thrown an exception - null value not allowed");
 } catch (NullPointerException e) {
  //good
 }
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_NotThere() {
 long now = System.currentTimeMillis();
 Date existingKey = new Date(now);
 Date existingValue = new Date(now);
 assertNull(cache.getAndPut(existingKey, existingValue));
 // unnecessary since after we test for same (not equals), but "advertises" consequence
 existingValue.setTime(now + 1);
 assertSame(existingValue, cache.get(existingKey));
}

代码示例来源：origin: org.infinispan/infinispan-core

private <K> void doPutGet(Supplier<K> keySupplier,
   Cache<K, String> readCache, Cache<K, String> writeCache) {
 K key = keySupplier.get();
 assertEquals(null, writeCache.getAndPut(key, "one"));
 assertEquals("one", readCache.get(key));
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_Existing_NonSameKey() throws Exception {
 Long key1 = System.currentTimeMillis();
 String value1 = "value1";
 assertNull(cache.getAndPut(key1, value1));
 Long key2 = new Long(key1);
 String value2 = "value2";
 assertEquals(value1, cache.getAndPut(key2, value2));
 assertEquals(value2, cache.get(key1));
 assertEquals(value2, cache.get(key2));
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_NotThere() {
 Long existingKey = System.currentTimeMillis();
 String existingValue = "value" + existingKey;
 assertNull(cache.getAndPut(existingKey, existingValue));
 assertEquals(existingValue, cache.get(existingKey));
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void getAndPut_Closed() {
 cache.close();
 try {
  cache.getAndPut(null, null);
  fail("should have thrown an exception - cache closed");
 } catch (IllegalStateException e) {
  //good
 }
}

代码示例来源：origin: org.infinispan/infinispan-core

private <K> void doContainsKey(Supplier<K> keySupplier,
   Cache<K, String> readCache, Cache<K, String> writeCache) {
 K key = keySupplier.get();
 assertEquals(false, readCache.containsKey(key));
 assertEquals(null, writeCache.getAndPut(key, "one"));
 assertEquals(true, readCache.containsKey(key));
}

代码示例来源：origin: javax.cache/cache-tests

@Test
public void shouldWriteThroughUsingGetAndPut_SingleEntryMultipleTimes() {
 assertEquals(0, cacheWriter.getWriteCount());
 assertEquals(0, cacheWriter.getDeleteCount());
 cache.getAndPut(1, "Gudday World");
 cache.getAndPut(1, "Gudday World");
 cache.getAndPut(1, "Gudday World");
 assertEquals(3, cacheWriter.getWriteCount());
 assertEquals(0, cacheWriter.getDeleteCount());
 assertTrue(cacheWriter.hasWritten(1));
 assertEquals("Gudday World", cacheWriter.get(1));
}

代码示例来源：origin: org.infinispan/infinispan-core

private <K> void doReplace(Supplier<K> keySupplier,
   Cache<K, String> readCache, Cache<K, String> writeCache) {
 K key = keySupplier.get();
 assertEquals(null, readCache.get(key));
 assertFalse(writeCache.replace(key, "xxx"));
 assertEquals(null, writeCache.getAndPut(key, "one"));
 assertEquals("one", readCache.get(key));
 assertTrue(writeCache.replace(key, "uno"));
 assertEquals("uno", readCache.get(key));
 assertTrue(writeCache.remove(key));
 assertEquals(null, readCache.get(key));
}

代码示例来源：origin: org.infinispan/infinispan-core

private <K> void doConditionalRemove(Supplier<K> keySupplier,
   Cache<K, String> readCache, Cache<K, String> writeCache) {
 K key = keySupplier.get();
 assertEquals(null, readCache.get(key));
 assertFalse(writeCache.remove(key, "xxx"));
 assertEquals(null, writeCache.getAndPut(key, "one"));
 assertEquals("one", readCache.get(key));
 assertFalse(writeCache.remove(key, "xxx"));
 assertEquals("one", readCache.get(key));
 assertTrue(writeCache.remove(key, "one"));
 assertEquals(null, readCache.get(key));
}

代码示例来源：origin: org.infinispan/infinispan-core

private <K> void doGetAndReplace(Supplier<K> keySupplier,
   Cache<K, String> readCache, Cache<K, String> writeCache) {
 K key = keySupplier.get();
 assertEquals(null, readCache.get(key));
 assertEquals(null, writeCache.getAndReplace(key, "xxx"));
 assertEquals(null, writeCache.getAndPut(key, "one"));
 assertEquals("one", readCache.get(key));
 assertEquals("one", writeCache.getAndReplace(key, "uno"));
 assertEquals("uno", readCache.get(key));
 assertTrue(writeCache.remove(key));
 assertEquals(null, readCache.get(key));
}

内容来源于网络，如有侵权，请联系作者删除！

Cache

相关文章

    查看更多
    微信公众号

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新文章

    更多
    • 蜀ICP备13028337号-1 大数据知识库 https://www.saoniuhuo.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com