package cz.cuni.amis.pogamut.base.server;
   
   import java.io.IOException;
   import java.util.ArrayList;
   
   import javax.management.JMX;
   import javax.management.MBeanServerConnection;
   import javax.management.ObjectName;
   import javax.management.remote.JMXConnector;
  import javax.management.remote.JMXConnectorFactory;
  import javax.management.remote.JMXServiceURL;
  
  import cz.cuni.amis.pogamut.base.agent.IAgent;
  import cz.cuni.amis.utils.collections.ObservableCollection;
  import cz.cuni.amis.utils.collections.ObservableList;
  
  
  class AbstractJMXAgentObserver implements IWorldAgentsObserver<IAgent> {
  
         
      protected ObservableCollection<IAgent> agents = 
              new ObservableList<IAgent>(new ArrayList<IAgent>());
      /**
       * Creates JMX wrapper for agent on specified adress and adds it to the list
       * of all connected agents.
       * @param serviceUrl URL of the JMX service where remote agent resides eg. service:jmx:rmi:///jndi/rmi://localhost:9999/server
       * @param objectName name of the MBean representing agent eg. myDomain:name=MyAgent1
       */
      protected void addJMXAgentFromAdress(String serviceUrl, ObjectName objectName) throws IOException {
          JMXServiceURL url = new JMXServiceURL(serviceUrl);
          JMXConnector jmxc = JMXConnectorFactory.connect(url, null);
          MBeanServerConnection mbsc = jmxc.getMBeanServerConnection();
          
          IAgent agent = JMX.newMXBeanProxy(mbsc, objectName, IAgent.class);
          
          agents.add(agent);
      }
  
      public ObservableCollection<IAgent> getAgents() {
              return agents;
      }
      
  }