WeakConcurrentHashMap

A Weak Concurrent Hash Map Solution which stores the keys and values only for a specific amount of time, and then expires after that time.

  
  // Create a Map Object
  long expiryInMillis = 1 * 60 * 1000;	// 1 minute
  WeakConcurrentHashMap<String, Long> map = new WeakConcurrentHashMap<String, Long>(expiryInMillis);
  
  // Use it
  map.put("key", valueObject);
  Long valueObject = map.get("key");
  
  // quit using it
  map.quitMap();
  

And to check if the map is alive

  if (map.isAlive()) {
  	// Your operations on map
  }
  

Listener Implementation

class MyMapListener implements WeakConcurrentHashMapListener {

	@Override
	public void notifyOnAdd(String key, Long value) {
		System.out.println("New key added to map. Key : " + key + ", Value : " + value);
	}

	@Override
	public void notifyOnRemoval(String key, Long value) {
		RestLogger.info("Key Removed from Map Key: " + key + ", Value : " + value);
	}
}

@author Vivekananthan M ([email protected])