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Show reverse DNS for nodes in PeerMonitor.

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This commit is contained in:
Mike Hearn 2013-02-15 16:10:26 +01:00
parent 4bcb550796
commit 3b7a494a37
1 changed files with 38 additions and 5 deletions
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43
examples/src/main/java/com/google/bitcoin/examples/PeerMonitor.java
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@ -34,6 +34,7 @@ import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.HashMap;
import java.util.List;
/**
@ -45,6 +46,8 @@ public class PeerMonitor {
private PeerTableModel peerTableModel;
private PeerTableRenderer peerTableRenderer;
private final HashMap<Peer, String> reverseDnsLookups = new HashMap<Peer, String>();
public static void main(String[] args) throws Exception {
BriefLogFormatter.init();
new PeerMonitor();
@ -66,15 +69,33 @@ public class PeerMonitor {
@Override
public void onPeerConnected(final Peer peer, int peerCount) {
refreshUI();
lookupReverseDNS(peer);
}
@Override
public void onPeerDisconnected(Peer peer, int peerCount) {
public void onPeerDisconnected(final Peer peer, int peerCount) {
refreshUI();
synchronized (reverseDnsLookups) {
reverseDnsLookups.remove(peer);
}
}
});
}
private void lookupReverseDNS(final Peer peer) {
new Thread() {
@Override
public void run() {
// This can take a looooong time.
String reverseDns = peer.getAddress().getAddr().getCanonicalHostName();
synchronized (reverseDnsLookups) {
reverseDnsLookups.put(peer, reverseDns);
}
refreshUI();
}
}.start();
}
private void refreshUI() {
// Tell the Swing UI thread to redraw the peers table.
SwingUtilities.invokeLater(new Runnable() {
@ -117,11 +138,12 @@ public class PeerMonitor {
peerTable.setDefaultRenderer(String.class, peerTableRenderer);
peerTable.setDefaultRenderer(Integer.class, peerTableRenderer);
peerTable.setDefaultRenderer(Long.class, peerTableRenderer);
peerTable.getColumnModel().getColumn(0).setPreferredWidth(300);
JScrollPane scrollPane = new JScrollPane(peerTable);
window.getContentPane().add(scrollPane, BorderLayout.CENTER);
window.pack();
window.setSize(640, 480);
window.setSize(720, 480);
window.setVisible(true);
// Refresh the UI every half second to get the latest ping times. The event handler runs in the UI thread.
@ -156,7 +178,7 @@ public class PeerMonitor {
@Override
public String getColumnName(int i) {
switch (i) {
case IP_ADDRESS: return "IP address";
case IP_ADDRESS: return "Address";
case PROTOCOL_VERSION: return "Protocol version";
case USER_AGENT: return "User Agent";
case CHAIN_HEIGHT: return "Chain height";
@ -189,7 +211,7 @@ public class PeerMonitor {
Peer peer = pendingPeers.get(row - connectedPeers.size());
switch (col) {
case IP_ADDRESS:
return peer.getAddress().getAddr().getHostAddress();
return getAddressForPeer(peer);
case PROTOCOL_VERSION:
return 0;
case CHAIN_HEIGHT:
@ -203,7 +225,7 @@ public class PeerMonitor {
Peer peer = connectedPeers.get(row);
switch (col) {
case IP_ADDRESS:
return peer.getAddress().getAddr().getHostAddress();
return getAddressForPeer(peer);
case PROTOCOL_VERSION:
return Integer.toString(peer.getPeerVersionMessage().clientVersion);
case USER_AGENT:
@ -217,6 +239,17 @@ public class PeerMonitor {
default: throw new RuntimeException();
}
}
private Object getAddressForPeer(Peer peer) {
String s;
synchronized (reverseDnsLookups) {
s = reverseDnsLookups.get(peer);
}
if (s != null)
return s;
else
return peer.getAddress().getAddr().getHostAddress();
}
}
private class PeerTableRenderer extends JLabel implements TableCellRenderer {