我正在使用Infinispan缓存。是否有任何方法可以在运行时获取条目的TTL(或生命周期)?我看到接口
谢谢
CacheEntry
作为getLifespan()
API,但我不知道如何处理CacheEntry接口,谢谢
CacheEntry
作为getLifespan()
API,但我不知道如何处理CacheEntry接口,要获取整个缓存的生命周期配置,您可以使用以下命令:
cache.getCacheConfiguration().expiration().lifespan();
要获取特定条目的生命周期,可以使用以下方法:
cache.getAdvancedCache().getCacheEntry("key").getLifespan();
过期时间 = 最大空闲时间 + 最后使用时间
使用这些信息来获取每个缓存条目的生命周期。CacheEntry.getLifeSpan()
并不能按预期工作,它返回 -1,表示无限寿命。import org.infinispan.Cache;
import org.infinispan.configuration.cache.CacheMode;
import org.infinispan.configuration.cache.ConfigurationBuilder;
import org.infinispan.container.entries.CacheEntry;
import org.infinispan.container.entries.TransientCacheEntry;
import org.infinispan.manager.DefaultCacheManager;
import org.infinispan.manager.EmbeddedCacheManager;
public class InfinispanTTL {
public static void main(String[] args) throws InterruptedException {
System.out.println("start");
ConfigurationBuilder confBuilder = new ConfigurationBuilder();
// confBuilder.eviction().strategy(EvictionStrategy.NONE).maxEntries(3);
confBuilder.expiration().lifespan(5000);
confBuilder.clustering().cacheMode(CacheMode.LOCAL);
EmbeddedCacheManager cacheManager = new DefaultCacheManager(confBuilder.build());
cacheManager.start();
Cache<String, CacheEntry> sessionCache = cacheManager.getCache("session");
System.out.println("Strategy used by container="
+ sessionCache.getCacheConfiguration().eviction().strategy());
System.out.println("Lifespan of container="
+ sessionCache.getCacheConfiguration().expiration().lifespan());
TransientCacheEntry cacheEntry = new TransientCacheEntry("a", "1", 1000, 2000);
System.out.println("Expiry Time = Max Idle + Last Used");
System.out.println("Max Idle=" + cacheEntry.getMaxIdle());
System.out.println("Last Used=" + cacheEntry.getLastUsed());
System.out.println("Expiry Time=" + cacheEntry.getExpiryTime());
sessionCache.put("a", cacheEntry);
System.out.println("Expirt Time from session cache="
+ ((TransientCacheEntry) sessionCache.get("a")).getExpiryTime());
System.out.println("Old value=" + sessionCache.get("a").getValue());
System.out.println("Set value");
sessionCache.get("a").setValue("3");
System.out.println("New value=" + sessionCache.get("a").getValue());
System.out.println("Expirt Time from session cache="
+ ((TransientCacheEntry) sessionCache.get("a")).getExpiryTime());
System.out.println("finish");
}
}
输出:
Strategy used by container=NONE
Lifespan of container=5000
Expiry Time = Max Idle + Last Used
Max Idle=1000
Last Used=2000
Expiry Time=3000
Life span from session cache=-1
Expiry Time from session cache=3000
Old value=1
Set value
New value=3
Expiry Time from session cache=3000