cancelconnectbehaviour.java

p2p仿真器。开发者可以工作在覆盖层中进行创造和测试逻辑算法或者创建和测试新的服务。PlanetSim还可以将仿真代码平稳转换为在Internet上的实验代码

package planet.symphony.behaviours;

import planet.commonapi.Node;
import planet.commonapi.RouteMessage;
import planet.commonapi.behaviours.Behaviour;
import planet.symphony.SymphonyNode;
import planet.symphony.SymphonyProperties;
import planet.util.Properties;
/**
 *  CancelConnectBehaviour's executes  when  a prior QUERY_CONNECT message has been rejected.
 *  Then the node attempts to get new long distances until the limit of attempts is achieved. 
 *  Then, the node is conisdered to be stable  with not enough long links. In order to get a 
 *  long links the Symphony's pdf function is used trough the getNewLongDistance method.
 *  
 * @author Marc Sanchez <[e-mail]>
 * @author Helio Tejedor <[e-mail]>
 */
public class CancelConnectBehaviour  implements Behaviour { 
    private SymphonyNode symphony = null;
    private RouteMessage newQueryConnect = null;
	/**
	 *  Given a RouteMessage and a Node as input, onMessage's method do execution 
	 * steps for the behaviour. Node should be casted to Node's class in order to
	 * manage data structures and protocol of designed overlay.
	 * @param msg RouteMessage taken as input.
	 * @param node Node taken as input.
	 */
	public void onMessage(RouteMessage msg, Node node) {
		symphony = (SymphonyNode) node;
		
		symphony.retriesNewLongDistance++;
		if (symphony.retriesNewLongDistance < ((SymphonyProperties) Properties.overlayPropertiesInstance).maxRetriesNewLongDistance) { 
			newQueryConnect = symphony.getNewLongDistance();
			if (newQueryConnect != null)
                symphony.sendMessage(newQueryConnect);
		}
	}
    
	/**
	 * @return Returns the name of behaviour. 
	 */
	public String getName() {
		return "CancelConnectBehaviour";
	}
	/**
	 * @return Returns a string representation of the behaviour. In general, the toString
	 * method returns a string that "textually represents" this behaviour. The result should 
	 * be a concise but informative representation that is easy for a person to read. 
	 */ 
	public String toString() {
		return getName();
	}
}