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Viewing changes to drizzled/plugin/scheduler.cc

  • Committer: Mark Atwood
  • Date: 2011-05-08 15:52:16 UTC
  • mfrom: (2302.1.8 refactor)
  • Revision ID: me@mark.atwood.name-20110508155216-bkg30r4ciqq8xy62
merge lp:~olafvdspek/drizzle/refactor

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drizzled/plugin/scheduler.cc
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 */
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#include <config.h>
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#include <algorithm>
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#include <drizzled/plugin/scheduler.h>
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#include <drizzled/errmsg_print.h>
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#include <drizzled/gettext.h>
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#include <drizzled/plugin/scheduler.h>
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namespace drizzled
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{
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extern size_t my_thread_stack_size;
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std::vector<plugin::Scheduler *> all_schedulers;
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/* Globals (TBK) */
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static plugin::Scheduler *scheduler= NULL;
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class FindSchedulerByName : public std::unary_function<plugin::Scheduler *, bool>
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{
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  const std::string *name;
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public:
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  FindSchedulerByName(const std::string *name_arg)
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    : name(name_arg) {}
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  result_type operator() (argument_type sched)
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  {
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    return (bool)((name->compare(sched->getName()) == 0));
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  }
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};
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namespace drizzled {
 
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typedef std::vector<plugin::Scheduler*> schedulers_t;
 
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static schedulers_t g_schedulers;
 
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static plugin::Scheduler* g_scheduler= NULL;
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bool plugin::Scheduler::addPlugin(plugin::Scheduler *sched)
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{
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  std::vector<plugin::Scheduler *>::iterator iter=
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    std::find_if(all_schedulers.begin(), all_schedulers.end(), 
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            FindSchedulerByName(&sched->getName()));
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  if (iter != all_schedulers.end())
 
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  BOOST_FOREACH(schedulers_t::reference it, g_schedulers)
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  {
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    errmsg_printf(error::ERROR,
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                  _("Attempted to register a scheduler %s, but a scheduler "
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                    "has already been registered with that name.\n"),
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                    sched->getName().c_str());
 
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    if (it->getName() != sched->getName())
 
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      continue;
 
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    errmsg_printf(error::ERROR, _("Attempted to register a scheduler %s, but a scheduler has already been registered with that name.\n"), sched->getName().c_str());
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    return true;
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  }
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  sched->deactivate();
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  all_schedulers.push_back(sched);
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  g_schedulers.push_back(sched);
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  return false;
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}
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void plugin::Scheduler::removePlugin(plugin::Scheduler *sched)
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{
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  all_schedulers.erase(std::find(all_schedulers.begin(),
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                            all_schedulers.end(),
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                            sched));
 
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  g_schedulers.erase(std::find(g_schedulers.begin(), g_schedulers.end(), sched));
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}
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bool plugin::Scheduler::setPlugin(const std::string& name)
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{
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  std::vector<plugin::Scheduler *>::iterator iter=
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    std::find_if(all_schedulers.begin(), all_schedulers.end(), 
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            FindSchedulerByName(&name));
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  if (iter != all_schedulers.end())
 
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  BOOST_FOREACH(schedulers_t::reference it, g_schedulers)
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  {
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    if (scheduler != NULL)
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      scheduler->deactivate();
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    scheduler= *iter;
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    scheduler->activate();
 
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    if (it->getName() != name)
 
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      continue;
 
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    if (g_scheduler)
 
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      g_scheduler->deactivate();
 
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    g_scheduler= it;
 
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    g_scheduler->activate();
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    return false;
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  }
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  errmsg_printf(error::WARN,
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                _("Attempted to configure %s as the scheduler, which did "
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                  "not exist.\n"), name.c_str());
 
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  errmsg_printf(error::WARN, _("Attempted to configure %s as the scheduler, which did not exist.\n"), name.c_str());
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  return true;
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}
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plugin::Scheduler *plugin::Scheduler::getScheduler()
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{
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  return scheduler;
 
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  return g_scheduler;
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}
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} /* namespace drizzled */