fr.esrf.TangoDs.PollThread Maven / Gradle / Ivy
//+======================================================================
// $Source$
//
// Project: Tango
//
// Description: java source code for the TANGO client/server API.
//
// $Author: pascal_verdier $
//
// Copyright (C) : 2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,
// 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 Lesser 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Tango. If not, see ::iterator ite = NULL;
try {
long ctm = System.currentTimeMillis();
before_cmd.tv_sec = (int) (ctm / 1000);
before_cmd.tv_usec = (int) (ctm - 1000 * before_cmd.tv_sec) * 1000;
before_cmd.tv_sec = before_cmd.tv_sec - Tango_DELTA_T;
// Read the attributes
attr_names[0] = to_do.name;
argout = to_do.dev.read_attributes(attr_names);
ctm = System.currentTimeMillis();
after_cmd.tv_sec = (int) (ctm / 1000);
after_cmd.tv_usec = (int) (ctm - 1000 * after_cmd.tv_sec) * 1000;
after_cmd.tv_sec = after_cmd.tv_sec - Tango_DELTA_T;
needed_time = time_diff(before_cmd, after_cmd);
// Insert only if update period > 0
to_do.dev.get_dev_monitor().get_monitor();
final PollObj poll_obj = to_do.dev.get_polled_obj_by_type_name(to_do.type, to_do.name);
if (poll_obj.get_upd() > 0) {
poll_obj.insert_data(argout[0], before_cmd, needed_time);
}
to_do.dev.get_dev_monitor().rel_monitor();
} catch (final DevFailed e) {
Except.print_exception(e);
final long ctm = System.currentTimeMillis();
after_cmd.tv_sec = (int) (ctm / 1000);
after_cmd.tv_usec = (int) (ctm - 1000 * after_cmd.tv_sec) * 1000;
after_cmd.tv_sec = after_cmd.tv_sec - Tango_DELTA_T;
needed_time = time_diff(before_cmd, after_cmd);
// to_do.dev.get_dev_monitor().get_monitor();
try {
final PollObj poll_obj = to_do.dev.get_polled_obj_by_type_name(to_do.type,
to_do.name);
poll_obj.insert_except(e, before_cmd, needed_time);
} catch (final DevFailed ex) {
}
to_do.dev.get_dev_monitor().rel_monitor();
}
}
// ===============================================================
/**
* This method is called when a trigger command has been received
*/
// ===============================================================
void one_more_trigg() throws DevFailed {
Util.out5.println("Polling thread has received a trigger");
WorkItem item = null;
for (int i = 0; i < ext_trig_works.size(); i++) {
final WorkItem w = (WorkItem) ext_trig_works.elementAt(i);
if (w.dev == local_cmd.dev && w.type == local_cmd.type && w.name.equals(local_cmd.name)) {
item = w;
}
}
// Check that the object to poll has been installed.
// If not, simply returns. This case should never happens because it is
// tested in the Util::trigger_polling() method before the trigger is
// effectively sent to this thread.
if (item == null) {
Util.out5.println("Object externally triggered not found !!!");
{
shared_cmd.trigger = false;
p_mon.signal();
}
return;
}
// Inform requesting thread that the work is done
{
shared_cmd.trigger = false;
p_mon.signal();
}
// Do the job
final WorkItem tmp = item;
if (polling_stop == false) {
if (tmp.type == Tango_POLL_CMD) {
poll_cmd(tmp);
} else {
poll_attr(tmp);
}
}
}
// ===============================================================
/**
* Polling thread loop.
*/
// ===============================================================
@Override
public void run() {
int received;
// noinspection InfiniteLoopStatement
while (true) {
// System.out.println("In PollThread loop (sleep=" + sleep +
// ")....");
try {
if (sleep != 0) {
received = get_command(sleep);
} else {
received = POLL_TIME_OUT;
}
long ctm = System.currentTimeMillis();
now.tv_sec = (int) (ctm / 1000);
now.tv_usec = (int) (ctm - 1000 * now.tv_sec) * 1000;
now.tv_sec = now.tv_sec - Tango_DELTA_T;
switch (received) {
case POLL_COMMAND:
execute_cmd();
break;
case POLL_TIME_OUT:
one_more_poll();
break;
case POLL_TRIGGER:
one_more_trigg();
break;
}
ctm = System.currentTimeMillis();
after.tv_sec = (int) (ctm / 1000);
after.tv_usec = (int) (ctm - 1000 * after.tv_sec) * 1000;
after.tv_sec = after.tv_sec - Tango_DELTA_T;
compute_sleep_time();
} catch (final DevFailed e) {
Util.out2.println("OUPS !! A thread fatal exception !!!!!!!!");
Except.print_exception(e);
Util.out2.println("Trying to re-enter the main loop");
}
}
}
// =============================================================================
// =============================================================================
// =============================================================================
/**
* The working Item class definition.
*/
// =============================================================================
class WorkItem {
/**
* The device pointer (servant)
*/
DeviceImpl dev;
/**
* The device poll list (PollObj vector)
*/
Vector poll_list;
/**
* The next wake up date
*/
TimeVal wake_up_date;
/**
* The update period (mS)
*/
long update;
/**
* Object type (command/attr)
*/
int type;
/**
* Object name
*/
String name;
WorkItem() {
wake_up_date = new TimeVal();
poll_list = new Vector();
}
@Override
public String toString() {
return name + " - " + update + " ms ";
}
}
}
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