Examples of marauroa.server.game.rp.MarauroaRPZone

marauroa.server.game.rp.MarauroaRPZone
Default implementation of IRPZone. This class implements the Delta^2 algorithm to save bandwidth.
The idea behind the DPA is to avoid sending ALL the objects to a client each time, but only those that have been modified. Imagine that we have 1000 objects, and only Object 1 and Object 505 are active objects that are modified each turn.
```
 The Traditional method: - Get objects that our player should see ( 1000 objects ) - Send them to player ( 1000 objects ) - Next turn - Get objects that our player should see ( 1000 objects ) - Send them to player - Next turn ... 
```
I hope you see the problem... we are sending objects that haven't changed each turn.
```
 The delta perception algorithm: - Get objects that our player should see ( 1000 objects ) - Reduce the list to the modified ones ( 1000 objects ) - Store also the objects that are not longer visible ( 0 objects ) - Send them to player ( 1000 objects ) - Next turn - Get objects that our player should see ( 1000 objects ) - Reduce the list to the modified ones ( 2 objects ) - Store also the objects that are not longer visible ( 0 objects ) - Send them to player ( 2 objects ) - Next turn ... 
```
The next step of the delta perception algorithm is pretty clear: delta2
The idea is to send only what changes of the objects that changed. This way we save even more bandwidth, making perceptions around 20% of the original delta perception size.
The delta2 algorithm is based on four containers:
- List of added objects
- List of modified added attributes of objects
- List of modified deleted attributes of objects
- List of deleted objects
To make perceptions work, it is important to call the modify method in RPZone, so this way objects modified are stored in the modified list. @author miguel

    RPObject pocket = new RPObject();
    pocket.put("size", 1);
    pocket.addSlot("container");
    lhand.add(pocket);


    zone = new MarauroaRPZone("test") {
      @Override
      public void onInit() throws Exception {
        // no database access as it is done in the super method
      }


      @Override
      public void onFinish() throws Exception {
        // no database access as it is done in the super method
      }
    };


    recreatedZone = new MarauroaRPZone("test") {
      @Override
      public void onInit() throws Exception {
        // no database access as it is done in the super method
      }

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    RPObject coin = new RPObject();
    coin.put("euro", 100);
    coin.put("value", 100);
    container.add(coin);


    zone = new MarauroaRPZone("test") {


      @Override
      public void onInit() throws Exception {
        // do nothing, but method is required by interface
      }

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    populate();
  }


  protected void populate() {
    IRPZone zone = new MarauroaRPZone("test");
    addRPZone(zone);


    RPObject hidden = new RPObject();
    zone.assignRPObjectID(hidden);
    hidden.put("hidden", "You don't see this object");
    hidden.hide();
    zone.add(hidden);
  }

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    RPObject coin = new RPObject();
    coin.put("euro", 100);
    coin.put("value", 100);
    container.add(coin);


    zone = new MarauroaRPZone("test");
    /* Define the object as storable */
    object.store();


    zone.assignRPObjectID(object);
    zone.add(object);

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    DBTransaction transaction = transactionPool.beginWork();


    try {
      rpzoneDAO.storeRPZone(transaction, zone);


      MarauroaRPZone newzone = new MarauroaRPZone("test");
      rpzoneDAO.loadRPZone(transaction, newzone);


      RPObject.ID id = new RPObject.ID(1, "test");
      assertEquals(zone.get(id), newzone.get(id));
    } finally {
      transactionPool.rollback(transaction);
    }
  }

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    DBTransaction transaction = transactionPool.beginWork();


    try {
      rpzoneDAO.storeRPZone(transaction, zone);


      MarauroaRPZone newzone = new MarauroaRPZone("test");
      rpzoneDAO.loadRPZone(transaction, newzone);


      RPObject.ID id = new RPObject.ID(1, "test");
      assertEquals(zone.get(id), newzone.get(id));


      rpzoneDAO.storeRPZone(transaction, newzone);


      MarauroaRPZone doublestoredzone = new MarauroaRPZone("test");
      rpzoneDAO.loadRPZone(transaction, doublestoredzone);


      id = new RPObject.ID(1, "test");
      assertEquals(zone.get(id), doublestoredzone.get(id));
    } finally {
      transactionPool.rollback(transaction);
    }
  }

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Related Classes of marauroa.server.game.rp.MarauroaRPZone

marauroa.common.game.BugAtApplyDifferencesTest

marauroa.common.game.Perception

marauroa.common.game.RPObject

marauroa.common.game.RPObjectDelta2Test

marauroa.functional.basic.BareRPWorld

marauroa.server.game.db.RPZoneAccessTest

marauroa.server.game.dbcommand.StoreZoneCommand

java.util.Date

marauroa.common.game.RPObjectInvalidException

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