SFSEventType ENUM and Example Programs (com.smartfoxserver.v2.core.SFSEventType)

SFSEventType

An Enum which consists the events which are raised and handled by smartfoxserver some of those are.

Note:-

• All these Events are related to server related, means these event are handled at server side only where as client's will fire these type of requests
• In order to handle these events in our code/program we need to register corresponding handler class for the events. (means we need to associate a class when that type of event fired/occurred).
• Through method addEventHandler() of SFSExtension we can register the events like
  addEventHandler(SFSEventType.USER_LOGIN, MyLoginEventHandler.class).
  addEventHandler(SFSEventType.USER_JOIN_ZONE, MyZoneJoinEventHandler.class).
• In the above addEventHandler() signatures indicates whenever USER_LOGIN request arrived from client then "MyLoginEventHandler" will be fired similarly the other request also.
• In order to handle these events the java class must be a subclass of "BaseServerEventHandler"
• In the BaseServerEventHandler a method named public void handleServerEvent(ISFSEvent event) will be fired when event fired.
• Most of the Events will consist the parameters, these parameters will attain the information of client request.
• If the USER_LOGIN event fired what we need is "username","password" etc.. these data are came as parameter, those can be fetched using handleServerEvent(ISFSEvent event).

Sample Code Snippets:-

Registering Events With HandlerClasses

For the sake of less code lines I am using Singleclass (MyEventHandler) to handle all events.

• addEventHandler(SFSEventType.USER_LOGIN, MyEventtHandler.class);
• addEventHandler(SFSEventType.USER_LOGIN, MyEventHandler.class);
• addEventHandler(SFSEventType.USER_JOIN_ZONE, MyEventHandler.class);

MyEventHandler.java snippet

public class MyEventHandler extends BaseServerEventHandler {
public void handleServerEvent(ISFSEvent event) throws SFSException {
    SFSEventType eventtype = event.getType();
    System.out.println("Event Fired "+eventtype+"\t time"+new Date());
  }
}

MyEventHandler.java SNIPPET WITH PARAMETERS CONCEPT

public class MyEventHandler extends BaseServerEventHandler {
    public void handleServerEvent(ISFSEvent event) throws SFSException {
      SFSEventType eventtype = event.getType();
        System.out.println("Event Fired "+eventtype+"\t time"+new Date());
        switch(eventtype){
        case SFSEventType.USER_LOGIN:
          User user = (User)event.getParameter(SFSEventParam.USER);
          String loginname = (String) event.getParameter(SFSEventParam.LOGIN_NAME);
          String password = (String) event.getParameter(SFSEventParam.LOGIN_PASSWORD);
          System.out.println(eventype +" Request Arrived From User "+user.getName()+"\t With LOGIN_NAME "+loginname+"\t password "+password);
          break;
        case SFSEventType.USER_DISCONNECT:
          user = (User)event.getParameter(SFSEventParam.USER);
          System.out.println(eventype +" Request Arrived From User "+user.getName());
          break;
        case SFSEventType.USER_JOIN_ZONE:
          user = (User)event.getParameter(SFSEventParam.USER);
          System.out.println(eventype +" Request Arrived From User "+user.getName());
          break;
        }
    }
}

• Key Classes And Interfaces of SmartfoxServer2X APIPrevious:-
• Next SFSExtension class and its methods with example programs.