Example: EVCache using Eureka

Below example depicts the use case for storing customer data in EVCache and using Eureka to discover & manage EVCache instances. The name of the EVCache cluster is called as EVCACHE_CUSTOMER and the cache name is called as cid.

Setting the Properties

Set the following properties before initializing EVCache or pass it as a command line argument -D

System.setProperty("evcache.pool.provider", "com.netflix.evcache.pool.eureka.EVCacheClientPoolImpl");

Initializing the pool (optional)

Optionally, you can initialize the EVCache Client Pool when your application/server is starting. This will establish the connection to an EVCache cluster called as EVCACHE_CUSTOMER

EVCacheClientPoolManager.getInstance().initEVCache("EVCACHE_CUSTOMER");

Creating EVCache instance

Create an instance of EVCache using the Builder passing the app name EVCACHE_CUSTOMER and the cache name called as cid. The cache name (optional) is used to prefix the keys stored in EVCache to avoid cache collisions.

EVCache evCache = (new EVCache.Builder()).setAppName("EVCACHE_CUSTOMER").setCacheName("cid").enableZoneFallback().build();

Performing operations on EVCache

/*
Sets the key: "Hello" to value: "World" for a time of 900 seconds in EVCache. This data will be written to both zones A and B.
*/
evCache.set("Hello", "World", 900);

/*
Gets the value for key: "Hello" from EVCache. The data will be retrieved from the zone local to the client. 
If the client is not in those zones then a zone will be chosen at random.
*/
String value = evCache.get("Hello");

//Deletes the value for key: "Hello" from EVCache.
evCache.delete("Hello");