Metrics! Added support for a "state of the server" report, in which

managers can participate, reporting lies, damned lies and useful
statistics. Initial participants include the client manager, the
connection manager and the distributed object manager.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1894 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/server/ClientManager.java

@@ -1,5 +1,5 @@
 //
-// $Id: ClientManager.java,v 1.25 2002/10/31 21:04:19 mdb Exp $
+// $Id: ClientManager.java,v 1.26 2002/11/05 02:17:56 mdb Exp $
 
 package com.threerings.presents.server;
 
@@ -30,7 +30,8 @@ import com.threerings.presents.server.util.SafeInterval;
  * going away) and from the dobjmgr thread (when clients are given the
  * boot for application-defined reasons).
  */
-public class ClientManager implements ConnectionObserver
+public class ClientManager
+    implements ConnectionObserver, PresentsServer.Reporter
 {
     /**
      * Constructs a client manager that will interact with the supplied
@@ -49,6 +50,8 @@ public class ClientManager implements ConnectionObserver
             }
         }, CLIENT_FLUSH_INTERVAL, null, true);
 
+        // register as a "state of server" reporter
+        PresentsServer.registerReporter(this);
     }
 
     /**
@@ -325,6 +328,17 @@ public class ClientManager implements ConnectionObserver
         }
     }
 
+    // documentation inherited from interface PresentsServer.Reporter
+    public void appendReport (StringBuffer report, long now, long sinceLast)
+    {
+        report.append("* presents.ClientManager:\n");
+        report.append("- Sessions: ");
+        report.append(_usermap.size()).append(" total, ");
+        report.append(_conmap.size()).append(" connected, ");
+        report.append(_penders.size()).append(" pending\n");
+        report.append("- Mapped users: ").append(_objmap.size()).append("\n");
+    }
+
     /**
      * Called by the client instance when the client requests a logoff.
      * This is called from the conmgr thread.