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package de.bwlehrpool.bwlp_guac;
import org.apache.guacamole.GuacamoleException;
import org.apache.guacamole.net.event.TunnelCloseEvent;
import org.apache.guacamole.net.event.TunnelConnectEvent;
import org.apache.guacamole.net.event.listener.Listener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.HashMap;
/**
* A listener to track whether a user currently is connected to a tunnel.
*/
public class TunnelListener implements Listener {
private static final Logger LOGGER = LoggerFactory.getLogger(TunnelListener.class);
private static final HashMap<String, Integer> userTunnelCount = new HashMap<String, Integer>();
public static boolean hasTunnel(String username) {
synchronized (userTunnelCount) {
return userTunnelCount.get(username) != null;
}
}
@Override
public void handleEvent(Object event) throws GuacamoleException {
Integer count;
int total;
if (event instanceof TunnelConnectEvent) {
String username = Util.getUsername((TunnelConnectEvent)event);
synchronized (userTunnelCount) {
count = userTunnelCount.get(username);
if (count == null) {
count = 1;
} else {
count++;
}
userTunnelCount.put(username, count);
total = userTunnelCount.size();
}
LOGGER.info("User " + username + " connected to a tunnel, count: " + count + ", total: " + total);
} else if (event instanceof TunnelCloseEvent) {
String username = Util.getUsername((TunnelCloseEvent)event);
synchronized (userTunnelCount) {
count = userTunnelCount.get(username);
if (count != null) {
count -= 1;
if (count > 0) {
userTunnelCount.put(username, count);
} else {
userTunnelCount.remove(username);
}
} else {
count = 0;
}
total = userTunnelCount.size();
}
LOGGER.info("User " + username + " closed a tunnel, count: " + count + ", total: " + total);
}
}
}
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