comparison src/samer/core_/util/shell/AgentManager.java @ 0:bf79fb79ee13

Initial Mercurial check in.

+/*
+ *	AgentManager.java	
+ *
+ *	Copyright (c) 2000, Samer Abdallah, King's College London.
+ *	All rights reserved.
+ *
+ *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
+ *	without even the implied warranty of MERCHANTABILITY or 
+ *	FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+package samer.core.util.shell;
+import  samer.core.*;
+import  java.awt.event.*;
+import  java.util.*;
+
+public class AgentManager implements Agent, ActionListener
+{
+	private Vector  agents=new Vector();
+	//private boolean exitOnReturn=false;
+
+	public AgentManager() { Shell.put("AgentManager",this); }
+
+	public ActionListener getBroadcaster() { return this; }
+
+	public void actionPerformed(ActionEvent e) {
+		dispatch(e.getActionCommand(),Shell.env());
+	}
+
+	public void getCommands(Agent.Registry r) { r.add("help").add("agents"); }
+	public void execute(String cmd, Environment env) throws Exception
+	{
+		if (cmd.equals("agents")) {
+			Shell.print("registered agents:");
+			Enumeration i=agents.elements();
+			while(i.hasMoreElements()) {
+				Shell.print(i.nextElement().toString());
+			}
+		} else if (cmd.equals("help")) help();
+	}
+
+	//public void exitOnReturn() { Shell.trace("*** exit on return"); exitOnReturn=true; }
+
+	public void registerAgent(Agent a) {
+		Shell.trace("registering agent: "+a);
+		agents.addElement(a);
+	}
+
+	public void deregisterAgent(Agent a) {
+		Shell.trace("deregistering agent: "+a);
+		agents.removeElement(a);
+	}
+
+	public void dispatch(String cmd, Environment env)
+	{
+		Enumeration i=agents.elements();
+		while(i.hasMoreElements()) {
+			Agent agent=(Agent)i.nextElement();
+			try { agent.execute(cmd,env); }
+			catch (Exception ex) {
+				Shell.print("*** agent error in "+agent);
+				Shell.print("*** exception: "+ex);
+				ex.printStackTrace();
+			}
+		}
+		//if (exitOnReturn) System.exit(0);
+	}
+
+	public void help()
+	{
+		Shell.print("____________________________________");
+		Shell.print("Registered Agents and their commands");
+
+		Enumeration i=agents.elements();
+		Agent.Registry printer = new Agent.Registry() {
+			public void setTarget(Agent a) {}
+			public Registry add( String name) { Shell.print("\t"+name); return this; }
+			public Registry add( String name, boolean initialValue) {
+				Shell.print("\t"+name+" (boolean)"); return this;
+			}
+			public void group() { Shell.print("............"); }
+		};
+
+		while(i.hasMoreElements()) {
+			Agent a=(Agent)(i.nextElement());
+			Shell.print("");
+			Shell.print("---- "+a.getClass().getName());
+			a.getCommands(printer);
+		}
+	}
+}
+