Executor.cpp

Go to the documentation of this file.

/*
 * This file is part of ArmarX.
 *
 * Copyright (C) 2011-2016, High Performance Humanoid Technologies (H2T), Karlsruhe Institute of Technology (KIT), all rights reserved.
 *
 * ArmarX 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.
 *
 * ArmarX 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, see <http://www.gnu.org/licenses/>.
 *
 * @package    ArmarXCore::core
 * @author     Nicola Miskowiec
 * @date       2016
 * @copyright  http://www.gnu.org/licenses/gpl-2.0.txt
 *             GNU General Public License
 */
 
 
#include "Executor.h"
 
#include <signal.h>
 
#include <chrono>
#include <filesystem>
#include <thread>
 
#include <sys/types.h>
 
#include "ArmarXCore/util/ScenarioManagerCommon/parser/iceparser.h"
#include <ArmarXCore/core/exceptions/Exception.h>
#include <ArmarXCore/core/logging/Logging.h>
 
using namespace ScenarioManager;
 
Exec::Executor::Executor(Exec::StopStrategyPtr strategy, Exec::ApplicationStarterPtr starter)
{
    setDefaultStopStrategy(strategy);
    setDefaultStarter(starter);
}
 
std::future<void>
Exec::Executor::startApplication(ApplicationInstancePtr application,
                                 bool printOnly,
                                 const std::string& commandLineParameters)
{
    if (application->getPid() != -1 || application->getStatusWriteBlock())
    {
        return std::future<void>();
    }
 
    application->setStatusWriteBlock(true);
    std::packaged_task<void()> task(std::bind(&ApplicationStarter::startApplication,
                                              getStarter(application->getScenario()).get(),
                                              application,
                                              statusManager,
                                              commandLineParameters,
                                              printOnly)); // wrap the function
 
    std::future<void> result = task.get_future(); // get a future
    std::thread t(std::move(task));
    if (printOnly)
    {
        t.join(); //if only the commands should be printed then we want sync behaviour
    }
    else
    {
        t.detach();
    }
    return result;
}
 
std::future<void>
Exec::Executor::stopApplication(ApplicationInstancePtr application)
{
    if (application->getStatusWriteBlock())
    {
        return std::future<void>();
    }
 
    application->setStatusWriteBlock(true);
    std::packaged_task<void()> task(std::bind(&StopStrategy::stop,
                                              getStopStrategy(application->getScenario()).get(),
                                              application)); // wrap the function
    std::future<void> result = task.get_future(); // get a future
    std::thread(std::move(task)).detach(); // launch on a thread
 
    return result;
}
 
void
Exec::Executor::asyncApplicationRestart(ApplicationInstancePtr application, bool printOnly)
{
    Data_Structure::ScenarioPtr scenario = application->getScenario();
    getStopStrategy(scenario)->stop(application);
 
    int waitCount = 0;
    auto state = getStarter(scenario)->getStatus(application, statusManager);
    while (state != ScenarioManager::Data_Structure::ApplicationStatus::Stopped &&
           state != ScenarioManager::Data_Structure::ApplicationStatus::Inactive)
    {
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
        waitCount++;
        //Try to stop for 20 secs
        if (waitCount == 200)
        {
            ARMARX_INFO_S << "The application " << application->getName()
                          << " is not Stopping please force kill it or try again. Aborting restart";
            return;
        }
        state = getStarter(scenario)->getStatus(application, statusManager);
    }
 
    ARMARX_INFO << "Starting application `" << application->getName() << "` which is `"
                << application->getExecutableAbsPath() << "`";
    getStarter(scenario)->startApplication(application, statusManager, "", printOnly);
}
 
std::future<void>
Exec::Executor::restartApplication(ApplicationInstancePtr application, bool printOnly)
{
    if (application->getStatusWriteBlock())
    {
        return std::future<void>();
    }
 
    application->setStatusWriteBlock(true);
 
    std::packaged_task<void()> task(std::bind(
        &Executor::asyncApplicationRestart, this, application, printOnly)); // wrap the function
 
    std::future<void> result = task.get_future(); // get a future
    std::thread(std::move(task)).detach(); // launch on a thread
 
    return result;
}
 
std::string
Exec::Executor::getApplicationStatus(ApplicationInstancePtr application)
{
    if (application->getStatusWriteBlock())
    {
        return "Waiting";
    }
    return getStarter(application->getScenario())->getStatus(application, statusManager);
}
 
std::future<void>
Exec::Executor::startScenario(std::shared_ptr<Data_Structure::Scenario> scenario,
                              bool printOnly,
                              const std::string& commandLineParameters)
{
    if (scenario->getStatusWriteBlock())
    {
        return std::future<void>();
    }
 
    scenario->setStatusWriteBlock(true);
    std::packaged_task<void()> task(std::bind(&ApplicationStarter::startScenario,
                                              getStarter(scenario).get(),
                                              scenario,
                                              statusManager,
                                              commandLineParameters,
                                              printOnly)); // wrap the function
 
    std::future<void> result = task.get_future(); // get a future
    std::thread t(std::move(task)); // launch on a thread
    if (printOnly)
    {
        t.join(); //if only the commands should be printed then we want sync behaviour
    }
    else
    {
        t.detach();
    }
    return result;
}
 
void
Exec::Executor::asyncScenarioStop(Data_Structure::ScenarioPtr scenario)
{
    std::vector<std::future<void>> futures;
 
    std::vector<ApplicationInstancePtr> apps = *scenario->getApplications();
    for (auto it = apps.begin(); it != apps.end(); it++)
    {
        futures.push_back(stopApplication(*it));
    }
 
    for (auto future = futures.begin(); future != futures.end(); ++future)
    {
        future->wait();
    }
}
 
std::future<void>
Exec::Executor::stopScenario(Data_Structure::ScenarioPtr scenario)
{
    std::packaged_task<void()> task(
        std::bind(&Executor::asyncScenarioStop, this, scenario)); // wrap the function
    std::future<void> result = task.get_future(); // get a future
    std::thread(std::move(task)).detach(); // launch on a thread
 
    return result;
}
 
void
Exec::Executor::asyncScenarioRestart(Data_Structure::ScenarioPtr scenario, bool printOnly)
{
    std::vector<std::future<void>> futures;
    for (auto app : *scenario->getApplications())
    {
        futures.push_back(restartApplication(app, printOnly));
    }
 
    for (auto future = futures.begin(); future != futures.end(); ++future)
    {
        future->wait();
    }
}
 
std::future<void>
Exec::Executor::restartScenario(Data_Structure::ScenarioPtr scenario, bool printOnly)
{
    std::packaged_task<void()> task(
        std::bind(&Executor::asyncScenarioRestart, this, scenario, printOnly)); // wrap the function
    std::future<void> result = task.get_future(); // get a future
    std::thread(std::move(task)).detach(); // launch on a thread
 
    return result;
}
 
void
Exec::Executor::loadAndSetCachedProperties(Data_Structure::ApplicationPtr application,
                                           std::string path,
                                           bool reload,
                                           bool set)
{
    std::filesystem::path xmlFilePath =
        std::filesystem::path(path) / std::filesystem::path(application->getPackageName() + "." +
                                                            application->getName() + ".xml");
 
    if (reload || !std::filesystem::exists(xmlFilePath))
    {
        std::filesystem::create_directories(path);
 
        std::string strCommand = application->getExecutableAbsPath()
                                     .append(" -p -f xml -o ")
                                     .append(xmlFilePath.string());
        int ret = system(strCommand.c_str());
        if (ret != 0)
        {
            ARMARX_WARNING << "Failed to generate properties xml for " << application->getName()
                           << "\nCommand was: " << strCommand;
        }
    }
    else
    {
        application->updateFound();
        if (!application->getFound())
        {
            return;
        }
        //if executable more recent that xml reload xml
        auto xmlDate = (std::filesystem::last_write_time(xmlFilePath));
 
        auto execDate =
            std::filesystem::last_write_time(application->getPathToExecutable().append("/").append(
                application->getExecutableName()));
 
        if (execDate > xmlDate)
        {
            loadAndSetCachedProperties(application, path, true, set);
            return;
        }
    }
 
    if (set)
    {
        Parser::IceParser parser;
        application->setProperties(parser.loadFromXml(xmlFilePath.string()));
    }
}
 
void
Exec::Executor::setDefaultStopStrategy(StopStrategyPtr strategy)
{
    defaultStopStrategy = strategy;
}
 
void
Exec::Executor::setDefaultStarter(ApplicationStarterPtr appStarter)
{
    defaultStartStrategy = appStarter;
}
 
void
Exec::Executor::setStopStrategy(StopStrategyPtr strategy, Data_Structure::ScenarioPtr scenario)
{
    this->stopStrategy[scenario] = strategy;
}
 
void
Exec::Executor::setStarter(ApplicationStarterPtr appStarter, Data_Structure::ScenarioPtr scenario)
{
    this->starter[scenario] = appStarter;
}
 
Exec::ApplicationStarterPtr
Exec::Executor::getStarter(Data_Structure::ScenarioPtr scenario)
{
    if (starter.count(scenario) == 0)
    {
        return defaultStartStrategy;
    }
    return starter[scenario];
}
 
Exec::StopStrategyPtr
Exec::Executor::getStopStrategy(Data_Structure::ScenarioPtr scenario)
{
    if (stopStrategy.count(scenario) == 0)
    {
        return defaultStopStrategy;
    }
    return stopStrategy[scenario];
}
 
Exec::StopStrategyPtr
Exec::Executor::getDefaultStopStrategy()
{
    return defaultStopStrategy;
}