Issue 10 create elementary agent (#35)

* Create Elementary Agent (#10)

* Rename Agents Folder (#10)

src/agents/Elementary.java

@@ -0,0 +1,89 @@
+package agents;
+
+import jade.core.AID;
+import jade.core.Agent;
+import jade.domain.DFService;
+import jade.domain.FIPAAgentManagement.*;
+import jade.domain.FIPAException;
+import utils.Utils;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Date;
+
+public class Elementary extends Agent {
+    protected ArrayList<AID> logisticsAgents;
+    protected boolean registerServices(ArrayList<ServiceDescription> serviceDescriptions){
+        DFAgentDescription agentDescription = new DFAgentDescription();
+        agentDescription.setName(getAID());
+        for(ServiceDescription serviceDescription : serviceDescriptions){
+            agentDescription.addServices(serviceDescription);
+        }
+
+        try {
+            DFService.register(this, agentDescription );
+        }
+        catch (FIPAException fe) {
+            Utils.print(getAID().getName(), "Failed to register.");
+            Utils.print(getAID().getName(), fe.getMessage());
+            return false;
+        }
+
+        return true;
+    }
+
+    public ArrayList<AID> getAgencyAgents() {
+        return logisticsAgents;
+    }
+
+    public void setAgencyAgents(ArrayList<AID> logisticsAgents) {
+        this.logisticsAgents = logisticsAgents;
+    }
+
+    protected void takeDown(){
+        try {
+            DFService.deregister(this);
+        } catch (FIPAException fe) {
+            fe.printStackTrace();
+        }
+    }
+
+    public AID getAgentByID(String id){
+        for (AID agent : logisticsAgents){
+            if(id.equals(agent.getLocalName())){
+                return agent;
+            }
+        }
+        return null;
+    }
+
+    protected void updateAgents(ArrayList<AID> agents, String type){
+        DFAgentDescription agentDescription = new DFAgentDescription();
+        ServiceDescription serviceDescription = new ServiceDescription();
+        serviceDescription.setType(type);
+        agentDescription.addServices(serviceDescription);
+
+        try {
+            DFAgentDescription[] result = DFService.search(this, agentDescription);
+            agents.clear();
+            for(DFAgentDescription agent : result){
+                agents.add(agent.getName());
+            }
+        } catch (FIPAException e) {
+            e.printStackTrace();
+        }
+    }
+
+    protected boolean registerInYellowPages(String type, String name) {
+        ServiceDescription serviceDescription = new ServiceDescription();
+        serviceDescription.setType(type);
+        serviceDescription.setName(name);
+
+        return registerServices(new ArrayList<ServiceDescription>(Arrays.asList(serviceDescription)));
+    }
+
+    public synchronized void log(String message) {
+        Date a = new Date();
+        System.out.println(a.toString() + " -> " + getLocalName() + ": " + message);
+    }
+}

src/utils/Utils.java

@@ -83,4 +83,8 @@ public static Document openAndParseXmlFile(String mapXmlFile) {
             return null;
         }
     }
+
+    public static void print(String name, String s) {
+        System.err.println(name + ": " + s);
+    }
 }