br.unb.cic.bionimbuz.services.UpdatePeerData.java Source code

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Here is the source code for br.unb.cic.bionimbuz.services.UpdatePeerData.java

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/*
BioNimbuZ is a federated cloud platform.
Copyright (C) 2012-2015 Laboratory of Bioinformatics and Data (LaBiD), 
Department of Computer Science, University of Brasilia, Brazil
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
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package br.unb.cic.bionimbuz.services;

import br.unb.cic.bionimbuz.controller.Controller;
import br.unb.cic.bionimbuz.services.messaging.CloudMessageService;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;

/**
 * Classe to update watcher on node
 *
 * @author gabriel
 */
public class UpdatePeerData implements Watcher {

    private final CloudMessageService cms;
    private final Service service;
    private final Controller controler;

    public UpdatePeerData(CloudMessageService cms, Service service, Controller controller) {
        this.cms = cms;
        this.service = service;
        this.controler = controller;
    }

    /**
     * Recebe as notificaes de evento do zookeeper.
     *
     * @param event evento que identifica a mudana realizada no zookeeper
     */
    @Override
    public void process(WatchedEvent event) {
        //chamada para alertar servico que adicionou o watcher, tratar evento na service
        //        System.out.println("[UpdatePeerData] event: " + event.toString());
        if (service != null)
            service.event(event);
        if (controler != null)
            controler.event(event);
        //Realiza a solicitao para um novo observer
        switch (event.getType()) {
        case NodeChildrenChanged:
            if (cms.getZNodeExist(event.getPath(), null))
                cms.getChildren(event.getPath(), this);
            break;
        case NodeDataChanged:
            if (cms.getZNodeExist(event.getPath(), null))
                cms.getData(event.getPath(), this);
            break;
        }
    }

}