This post explains EternalExpiryPolicy with simple example. EternalExpiryPolicy is an expiry policy used to inform cache to never remove entries in the cache. Below is an example of how to use it. Main Code 1 import java.util.Iterator; 2 3 import javax.cache.Cache; 4 import javax.cache.Cache.Entry; 5 import javax.cache.CacheManager; 6 import javax.cache.Caching; 7 import javax.cache.configuration.Factory; 8 import…… Continue reading JCache EternalExpiryPolicy Example

This post explains how to access the cache provider’s Cache implementation through java cache api. In all my previous post related to Caching, I gave examples where I was accessing cache provider for caching functionality through the Java Cache API. The java cache api is set of specifications, which are implemented by cache providers and…… Continue reading Accessing cache provider’s Cache implementation

Whenever a Cache entry is expired, an event (i.e., CacheEntryEvent) is generated. In this post under JCache, I will show with an example how to create a listener to listen for those events and respond. We have to create a listener class which implements the javax.cache.event.CacheEntryExpiredListener interface as shown below import java.util.Iterator; import javax.cache.event.CacheEntryEvent; import…… Continue reading Listening to Cache Entry Expired events

Whenever a Cache entry is updated, an event (i.e., CacheEntryEvent) is generated. In this post under JCache, I will show with an example how to create a listener to listen for those events and respond. We have to create a listener class which implements the javax.cache.event.CacheEntryUpdatedListener interface as shown below import java.util.Iterator; import javax.cache.event.CacheEntryEvent; import…… Continue reading Listening to Cache Entry Update events

Whenever a Cache entry is removed, an event (i.e., CacheEntryEvent) is generated. In this post under JCache, I will show with an example how to create a listener to listen for those events and respond. We have to create a listener class which implements the javax.cache.event.CacheEntryRemovedListener interface as shown below import java.util.Iterator; import javax.cache.event.CacheEntryEvent; import…… Continue reading Listening to Cache Entry Removed events

Whenever a new Cache entry is created, an event (i.e., CacheEntryEvent) is generated. In this post under JCache, I will show with an example how to create a listener to listen for those events and respond. We have to create a listener class which implements the javax.cache.event.CacheEntryCreatedListener interface as shown below import java.util.Iterator; import javax.cache.event.CacheEntryCreatedListener;…… Continue reading Listening to Cache Entry Created events

This post introduces you to JCache EntryProcessor interface. This interface is used to create concrete classes, whose purpose is to modify a cache entry. This is useful when multiple thread are accessing the cache and trying to modify a cache entry at the same time. To avoid threading issues like race condition etc, the thread…… Continue reading JCache EntryProcessor Example

This post explains how to access the cache provider’s CacheManager implementation through java cache api. In all my previous post related to Caching, I gave examples where I was using cache provider for caching functionality through the Java Cache API. The java cache api is set of specifications, which are implemented by cache providers and…… Continue reading Accessing cache provider’s CacheManager implementation

This post explains how to externalize cache configuration to a file instead of configuring them programmatically. For our example, I will be using ehcache tool. Below is the ehcache file which describe the configuration information required to create a cache named “ready-cache”. The key and value data type is String and the entries will be…… Continue reading Configuring cache non-programmatically

This post explains how to create a custom expiry policy for the cache. Below is the example Custom Expiry Policy 1 import java.util.concurrent.TimeUnit; 2 3 import javax.cache.expiry.Duration; 4 import javax.cache.expiry.ExpiryPolicy; 5 6 public class CustomTouchedExpiryPolicy implements ExpiryPolicy { 7 @Override 8 public Duration getExpiryForAccess() { 9 Duration duration = new Duration(TimeUnit.MINUTES, 2); 10 return duration;…… Continue reading Creating a custom expiry policy factory