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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2016 Fraunhofer ESK
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author:Karsten Roscher <karsten.roscher@esk.fraunhofer.de>
*/
#include "traci-node-lifecycle.h"
#include <utility>
#include "ns3/simulator.h"
#include "ns3/log.h"
#include "ns3/node-lifecycle-manager.h"
NS_LOG_COMPONENT_DEFINE ("TraCiNodeLifecyclePolicy");
namespace ns3
{
TraCiNodeLifecyclePolicy::TraCiNodeLifecyclePolicy()
: m_earliestActivationTime (Seconds (0))
{
}
TraCiNodeLifecyclePolicy::~TraCiNodeLifecyclePolicy()
{
// cancel pending events - just to be sure
for (ActivationMap::iterator it = m_waitingNodes.begin ();
it != m_waitingNodes.end (); ++it)
{
it->second.Cancel ();
}
}
void
TraCiNodeLifecyclePolicy::SetRandomActivationDelay (Ptr<RandomVariableStream> rand)
{
m_randomDelay = rand;
}
void
TraCiNodeLifecyclePolicy::SetEarliestActivationTime (Time startTime)
{
m_earliestActivationTime = startTime;
}
void
TraCiNodeLifecyclePolicy::HandleActivateNode (Ptr<Node> node, Ptr<traci::Vehicle> vehicle)
{
// get current time
Time now = Simulator::Now ();
if (m_randomDelay)
{
// calculate time to wait in case we are before the activation time
// will be 0 if now >= earliest time
Time timeToWait = std::max (m_earliestActivationTime, now) - now;
// schedule for later
EventId e = Simulator::Schedule (timeToWait + Seconds (m_randomDelay->GetValue ()),
&TraCiNodeLifecyclePolicy::HandleDelayedActivation, this, node);
m_waitingNodes.insert (std::make_pair (node, e));
}
else
{
if (now >= m_earliestActivationTime)
{
// activate right away
ActivateNode (node);
}
else
{
// schedule for the earliest activation time
EventId e = Simulator::Schedule (m_earliestActivationTime - now,
&TraCiNodeLifecyclePolicy::HandleDelayedActivation, this, node);
m_waitingNodes.insert (std::make_pair (node, e));
}
}
}
void
TraCiNodeLifecyclePolicy::HandleShutdownNode (Ptr<Node> node)
{
ActivationMap::iterator it = m_waitingNodes.find (node);
if (it != m_waitingNodes.end ())
{
NS_LOG_LOGIC ("Node to shut down is still waiting for activation");
// cancel pending event to avoid activation later
it->second.Cancel ();
// remove entry from map
m_waitingNodes.erase (it);
}
// deactivate node - does not hurt even if it was not activated yet
DeactivateNode (node);
}
void
TraCiNodeLifecyclePolicy::HandleDelayedActivation (Ptr<Node> node)
{
ActivationMap::iterator it = m_waitingNodes.find (node);
if (it != m_waitingNodes.end ())
{
NS_LOG_LOGIC ("Removing entry from waiting list");
m_waitingNodes.erase (it);
}
else
{
NS_LOG_WARN ("Handling delayed activation but map entry is missing");
}
ActivateNode (node);
}
} // namespace ns3