Get the TTL at runtime with infinispan - infinispan

Question

I am using the Infinispan cache. Is there any way to get the TTL (or lifepsan) of entries at runtime? I see the interface CacheEntry as a getLifespan() API but I don't see how to get a handle on CacheEntry interface,
Thanks

Answer 1

To get the configuration of lifespan for entire cache, you can use:
cache.getCacheConfiguration().expiration().lifespan();
and to obtain lifespan for specific entry, you can use:
cache.getAdvancedCache().getCacheEntry("key").getLifespan();
Hope that helps!

Answer 2

Each Cache Entry contains information about:
Last Used
Max Idle
Expiry Time
Where Expiry Time = Max Idle + Last Used
Use this information to get the lifespan of each Cache Entry.
Method CacheEntry.getLifeSpan() is not working as expected that retrieves the lifespan of this entry. It returns -1 that means an unlimited lifespan.
Here is a sample code:
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");
}
}
Output:
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