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//+=============================================================================
//
// file : StarterUtil.cpp
//
// description : C++ source for tools used by the Starter device server.
//
// project : TANGO Device Server
//
// $Author$
//
// Copyright (C) : 2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015
// European Synchrotron Radiation Facility
// BP 220, Grenoble 38043
// FRANCE
//
// This file is part of Tango.
//
// Tango is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Tango 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 Tango. If not, see <http://www.gnu.org/licenses/>.
//
// $Revision$
// $Date$
//
//-=============================================================================
#include <tango/tango.h>
#include "PingThread.h"
#include "Logging.h"
#include <utility>
#ifndef TIME_VAR
#ifndef _TG_WINDOWS_
# define TimeVal struct timeval
# define GetTime(t) gettimeofday(&t, nullptr);
# define Elapsed(before, after) \
1000.0*(after.tv_sec-before.tv_sec) + \
((double)after.tv_usec-before.tv_usec) / 1000
#else
# define TimeVal struct _timeb
# define GetTime(t) _ftime(&t);
# define Elapsed(before, after) \
1000*(after.time - before.time) + (after.millitm - before.millitm)
#endif /* _TG_WINDOWS_ */
#endif /* TIME_VAR */
namespace Starter_ns {
//+----------------------------------------------------------------------------
/**
* Constructor
*/
//+----------------------------------------------------------------------------
PingThreadData::PingThreadData(std::string sname) {
servname = std::move(sname);
stop_thread = false;
last_write_time = time(nullptr);
state = Tango::ON;
nbInstances = 0;
}
//+----------------------------------------------------------------------------
/**
* Get the server name
*/
//+----------------------------------------------------------------------------
std::string PingThreadData::get_server_name() {
omni_mutex_lock sync(*this);
return servname;
}
//+----------------------------------------------------------------------------
/**
* command to stop thread
*/
//+----------------------------------------------------------------------------
void PingThreadData::set_stop_thread() {
omni_mutex_lock sync(*this);
stop_thread = true;
signal();
}
//+----------------------------------------------------------------------------
/**
* get stop thread status
*/
//+----------------------------------------------------------------------------
bool PingThreadData::get_stop_thread() {
omni_mutex_lock sync(*this);
return stop_thread;
}
//+----------------------------------------------------------------------------
/**
* Return the elapsed time from last write.
*/
//+----------------------------------------------------------------------------
time_t PingThreadData::get_last_write_time() {
omni_mutex_lock sync(*this);
return last_write_time;
}
//+----------------------------------------------------------------------------
/**
* Set the ping result.
*/
//+----------------------------------------------------------------------------
void PingThreadData::set_state(Tango::DevState st) {
omni_mutex_lock sync(*this);
state = st;
last_write_time = time(nullptr);
}
//+----------------------------------------------------------------------------
/**
* Set the ping result.
*/
//+----------------------------------------------------------------------------
Tango::DevState PingThreadData::get_state() {
omni_mutex_lock sync(*this);
return state;
}
//+----------------------------------------------------------------------------
/**
* Force thread to update data.
*/
//+----------------------------------------------------------------------------
void PingThreadData::wake_up() {
omni_mutex_lock sync(*this);
signal();
}
//+----------------------------------------------------------------------------
//+----------------------------------------------------------------------------
void PingThreadData::setNbInstaces(int nb) {
omni_mutex_lock sync(*this);
nbInstances = nb;
}
//+----------------------------------------------------------------------------
//+----------------------------------------------------------------------------
int PingThreadData::getNbInstaces() {
omni_mutex_lock sync(*this);
return nbInstances;
}
//+----------------------------------------------------------------------------
//+----------------------------------------------------------------------------
//+----------------------------------------------------------------------------
/**
* Create a thread to ping server
*
* @param shared pointer on shared data between thread and DS.
* @param name The pinged server name
* @param timeout timeout value in milliseconds for ping command.
*/
//+----------------------------------------------------------------------------
PingThread::PingThread(PingThreadData *sd, const std::string& name, CheckProcessUtil *proc_util)
{
// Convert instance to lowercase
unsigned long idx = name.find('/');
std::string exeFile = name.substr(0, idx);
std::string instance = name.substr(++idx);
transform(instance.begin(), instance.end(),
instance.begin(), ::tolower);
servname = exeFile +'/'+instance;
shared = sd;
process_util = proc_util;
}
//+----------------------------------------------------------------------------
/**
* Execute the thread loop.
*/
//+----------------------------------------------------------------------------
void *PingThread::run_undetached(TANGO_UNUSED(void *ptr)) {
TimeVal before{}, after{};
Tango::DeviceProxy *pDevice = nullptr;
Tango::DevState state;
bool stop_thread = false;
std::string adm_devname("dserver/");
adm_devname += servname;
while (!stop_thread) {
GetTime(before);
// Make sure server running in one instance
int nbInstances = process_util->getNbServerInstances(servname);
shared->setNbInstaces(nbInstances);
// Check before if server running or failed
if (process_util->is_server_running(servname)) {
// try to build DeviceProxy
if (pDevice == nullptr) {
try {
pDevice = new Tango::DeviceProxy(adm_devname);
}
catch (Tango::DevFailed &e) {
Tango::Except::print_exception(e);
}
catch (...) {
TANGO_LOG_INFO << "============================================" << std::endl;
TANGO_LOG_INFO << " Exception catch !!!!!!" << std::endl;
TANGO_LOG_INFO << "============================================" << std::endl;
}
}
if (pDevice != nullptr) {
try {
pDevice->ping();
state = Tango::ON;
}
catch (Tango::DevFailed &) {
TANGO_LOG_INFO << servname << " is running but not responding !!!" << std::endl;
//Tango::Except::print_exception(e);
state = Tango::MOVING;
}
} else {
state = Tango::FAULT;
}
} else {
state = Tango::FAULT;
}
shared->set_state(state);
// Compute time to sleep
GetTime(after)
double dt = (double) Elapsed(before, after);
long time_to_sleep = 2000 - (int) dt;
if (time_to_sleep < 10)
time_to_sleep = 10;
// Check if thread must be stopped.
stop_thread = shared->get_stop_thread();
if (!stop_thread) {
// And wait for next ping
omni_mutex_lock sync(*shared);
shared->wait(time_to_sleep);
}
stop_thread = shared->get_stop_thread();
}
delete shared;
delete pDevice;
return nullptr;
}
//+----------------------------------------------------------------------------
//+----------------------------------------------------------------------------
} // namespace
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