VisClient/org/hfbk/vis/ServerManager.java

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package org.hfbk.vis;

import java.util.HashMap;

import org.dronus.graph.Graph;
import org.hfbk.util.Updater;
import org.hfbk.vis.source.Source;

public class ServerManager extends Thread{
                
        HashMap<String,Graph> nodes=new HashMap<String,Graph>();
        
        HashMap<String, Source> fetchers=new HashMap<String, Source>();
        
        String getServer(){
                String[] servers=Prefs.current.baseURLs.split(";");
                
                if (servers.length==0) return "";
                
                System.out.println("Checking servers: "+Prefs.current.baseURLs);

                //start simultaneous fetches for a server 
                for(String s: servers){
                        Source source=Source.getSource(s+"graph.php?action=getgraph&source=server");
                        source.setPriority(Thread.MAX_PRIORITY);
                        fetchers.put(s,source);                 
                }
                
                String server=null;             
                
                try {
                        Thread.sleep(Prefs.current.servertimeout);
                } catch (InterruptedException e) {}
                
                //test servers in order
                for (String s: servers){
                        Source sources=fetchers.get(s);
                        if (sources!=null && sources.finished){
                                server=s;
                                break;
                        }
                }
                
                if (server==null){ 
                        System.out.println("Unable to find ANY Vis Server! Please check your internet connection");
                        server="http://";
                }
                
                return server;
        }
        
        public void run() {
                Prefs.current.baseURL=getServer();
                System.out.println("Using Server " + Prefs.current.baseURL);
                if (Prefs.current.update) Updater.update();
        }
}

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