- cpp/demo/Ice/session now uses a timer for the periodic reaping.

- cpp/demo/Glacier2/chat now uses a custom permissions verifier,
  and a timer for refresh of the Glacier2 session.  Squashed commit
  of the following:

commit 82732512d64b4b6782b9c96e9c558ad56ea232af
Author: Matthew Newhook <matthew@zeroc.com>
Date:   Wed Sep 9 15:35:47 2009 -0230

    Simplify session demo.

commit 07cf68b9d12e8d648980d4bcae354e7531411b47
Author: Matthew Newhook <matthew@zeroc.com>
Date:   Wed Sep 9 14:59:15 2009 -0230

    chat demo now uses a custom perissions verifier, and a timer task.

1 files changed, 59 insertions, 0 deletions

diff --git a/cpp/demo/Ice/session/ReapTask.cpp b/cpp/demo/Ice/session/ReapTask.cpp
new file mode 100644
index 00000000000..e64ed458445
--- /dev/null
+++ b/cpp/demo/Ice/session/ReapTask.cpp
@@ -0,0 +1,59 @@
+// **********************************************************************
+//
+// Copyright (c) 2003-2009 ZeroC, Inc. All rights reserved.
+//
+// This copy of Ice is licensed to you under the terms described in the
+// ICE_LICENSE file included in this distribution.
+//
+// **********************************************************************
+
+#include <ReapTask.h>
+
+using namespace std;
+using namespace Demo;
+
+ReapTask::ReapTask() :
+    _timeout(IceUtil::Time::seconds(10))
+{
+}
+
+void
+ReapTask::runTimerTask()
+{
+    Lock sync(*this);
+
+    list<SessionProxyPair>::iterator p = _sessions.begin();
+    while(p != _sessions.end())
+    {
+        try
+        {
+            //
+            // Session destruction may take time in a
+            // real-world example. Therefore the current time
+            // is computed for each iteration.
+            //
+            if((IceUtil::Time::now(IceUtil::Time::Monotonic) - p->session->timestamp()) > _timeout)
+            {
+                string name = p->proxy->getName();
+                p->proxy->destroy();
+                cout << "The session " << name << " has timed out." << endl;
+                p = _sessions.erase(p);
+            }
+            else
+            {
+                ++p;
+            }
+        }
+        catch(const Ice::ObjectNotExistException&)
+        {
+            p = _sessions.erase(p);
+        }
+    }
+}
+
+void
+ReapTask::add(const SessionPrx& proxy, const SessionIPtr& session)
+{
+    Lock sync(*this);
+    _sessions.push_back(SessionProxyPair(proxy, session));
+}