callcache.java

QUICKSTARTS SPRING QUICKSTARTS SPRING QUICKSTARTS SPRING

/**
 * 
 */
package quickstart.cache;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author tamdv
 * 
 */
public class CallCache {
	public CallCache(boolean shouldSynchronize) {
		cache = (shouldSynchronize) ? new ConcurrentHashMap<ObjectMethodCall, Object>()
				: new HashMap<ObjectMethodCall, Object>();
	}

	private final Map<ObjectMethodCall, Object> cache;

	public static Object NULL_RETURN = new Object();

	/**
	 * Will return NULL_RETURN if the method call result was cached, and the
	 * return from the method call was null.
	 */
	public Object getFromCache(ObjectMethodCall methodCall) {
		return cache.get(methodCall);
	}

	public void setInCache(ObjectMethodCall methodCall, Object obj) {
		if (obj == null) {
			obj = NULL_RETURN;
		}
		cache.put(methodCall, obj);
	}
}