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// **********************************************************************
//
// Copyright (c) 2003-2014 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.
//
// **********************************************************************
namespace IceInternal
{
using System.Diagnostics;
using System.Collections.Generic;
public sealed class ConnectionMonitor : TimerTask
{
public void destroy()
{
lock(this)
{
Debug.Assert(instance_ != null);
instance_ = null;
_connections = null;
}
}
public void checkIntervalForACM(int acmTimeout)
{
if(acmTimeout <= 0)
{
return;
}
//
// If Ice.MonitorConnections isn't set (_interval == 0), the given ACM is used
// to determine the check interval: 1/10 of the ACM timeout with a minmal value
// of 5 seconds and a maximum value of 5 minutes.
//
// Note: if Ice.MonitorConnections is set, the timer is schedulded only if ACM
// is configured for the communicator or some object adapters.
//
int interval;
if(_interval == 0)
{
interval = System.Math.Min(300, System.Math.Max(5, (int)acmTimeout / 10));
}
else if(_scheduledInterval == _interval)
{
return; // Nothing to do, the timer is already scheduled.
}
else
{
interval = _interval;
}
//
// If no timer is scheduled yet or if the given ACM requires a smaller interval,
// we re-schedule the timer.
//
lock(this)
{
if(_scheduledInterval == 0 || _scheduledInterval > interval)
{
_scheduledInterval = interval;
instance_.timer().cancel(this);
instance_.timer().scheduleRepeated(this, interval * 1000);
}
}
}
public void add(Ice.ConnectionI connection)
{
lock(this)
{
Debug.Assert(instance_ != null);
_connections.Add(connection);
}
}
public void remove(Ice.ConnectionI connection)
{
lock(this)
{
Debug.Assert(instance_ != null);
_connections.Remove(connection);
}
}
//
// Only for use by Instance.
//
internal ConnectionMonitor(Instance instance, int interval)
{
instance_ = instance;
_interval = interval;
_scheduledInterval = 0;
_connections = new HashSet<Ice.ConnectionI>();
}
public void runTimerTask()
{
Ice.ConnectionI[] connections = null;
lock(this)
{
if(instance_ == null)
{
return;
}
connections = new Ice.ConnectionI[_connections.Count];
_connections.CopyTo(connections);
}
//
// Monitor connections outside the thread synchronization,
// so that connections can be added or removed during
// monitoring.
//
long now = IceInternal.Time.currentMonotonicTimeMillis();
foreach(Ice.ConnectionI connection in connections)
{
try
{
connection.monitor(now);
}
catch(System.Exception ex)
{
lock(this)
{
if(instance_ == null)
{
return;
}
instance_.initializationData().logger.error("unknown exception in connection monitor:\n" + ex);
}
}
}
}
private Instance instance_;
private readonly int _interval;
private int _scheduledInterval;
private HashSet<Ice.ConnectionI> _connections;
}
}
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