Question

我使用来自infinispan 8.2.6.Final的树缓存。我有下一个服务：

zip

Aspect @MCacheable通过public class TestService { public static final String FIRST_CACHE = "firstCache"; private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); @MCacheable(value = FIRST_CACHE, key = "/#{id}/first") public Object putInFirstCache(String id, String data) { log.info("putInFirstCache"); return data; } @MCacheable(value = FIRST_CACHE, key = "/#{id}/second") public Object putInSecondCache(String id, String data) { log.info("putInSecondCache"); return data; } @MCacheEvict(value = FIRST_CACHE, key = "/#{id}") public void evictFromCache(String id) { log.info("evictFromCache"); } }

将方法的结果放入具有fqn“key”的TreeCache中

Aspect @MCacheEvict通过treeCache.put(fqn, "data", result);

从缓存中删除值

方面的值是hashMap中TreeCache的关键。

所以，我为这方面写了一个简单的测试：

treeCache.removeNode(fqn);

缓存配置为：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = CacheTestConfig.class, loader = AnnotationConfigContextLoader.class)
public class AspectTest {

    @Autowired
    private TestService testService;

    @Autowired
    private TreeCache treeCache;

    @Test
    public void testMCacheEvicts() throws InterruptedException {
        String id = UUID.randomUUID().toString();
        String data = System.currentTimeMillis() + "";

        testService.putInFirstCache(id, data);
        Thread.sleep(2000);
        testService.putInSecondCache(id, data);
        cacheDump(treeCache);

        Thread.sleep(3500);
        //miss here
        cacheDump(treeCache);
        assertEquals(null, treeCacheContainer.get(TestService.FIRST_CACHE).get(id + "/first", "data"));
        testService.evictFromCache(id);
        cacheDump(treeCache);
        assertEquals(null, treeCacheContainer.get(TestService.FIRST_CACHE).get(id + "/second", "data"));

    }

    private void cacheDump(TreeCache<String, Object> treeCache) {
        StringBuilder sb = new StringBuilder("{\r\n");
        for (Map.Entry<?, ?> entry : treeCache.getCache().entrySet()) {
            sb.append("[ ").append(entry.getKey()).append(",").append(entry.getValue()).append(" ]\r\n");
        }
        sb.append("}\r\n");

        System.out.println("Cache dump: " + sb.toString());
    }
}

这个测试的结果非常奇怪：

@Bean
public DefaultCacheManager cacheManager() {
    org.infinispan.configuration.cache.Configuration cfg = new ConfigurationBuilder()
            .jmxStatistics().enable()
            .eviction().strategy(EvictionStrategy.LRU).type(EvictionType.COUNT).size(5000)
            .expiration().wakeUpInterval(2, TimeUnit.SECONDS).lifespan(5, TimeUnit.SECONDS).maxIdle(100, TimeUnit.SECONDS)
            .invocationBatching().enable()
            .build();
    return new DefaultCacheManager(cfg, true);
}

谁知道为什么infinispan过期缓存的根节点，如果孩子存在？

Answer 1

简单的答案是，因为TreeCache实现中没有任何内容可以处理到期。

底层缓存单独过期每个条目，TreeCache必须触及每个父级的STRUCTURE和DATA条目，以修改子级以使其保持活动状态。或者，可能更容易实现，TreeCache可以确保在父级到期时从缓存中删除所有子级。

错误的工作infinispan树缓存

1 个答案: