Priority database for signal processes.
/**
* Installs a new process into the database.
*
* @param object $process \XPSPL\Process
*
* @return void
*/
public function install(\XPSPL\Process $process)
{
if (XPSPL_DEBUG) {
logger(XPSPL_LOG)->debug(sprintf('%s process install', $process));
}
$priority = $process->get_priority();
if ($this->offsetExists($priority)) {
if ($this->offsetGet($priority) instanceof Processes) {
if (XPSPL_DEBUG) {
logger(XPSPL_LOG)->debug(sprintf('%s sub-database root', $this->offsetGet($priority)));
logger(XPSPL_LOG)->debug(sprintf('%s next priority', $this->offsetGet($priority)->end()->get_priority() + 1));
}
$process->set_priority($this->offsetGet($priority)->end()->get_priority() + 1);
$this->offsetGet($priority)->install($process);
} else {
if (XPSPL_DEBUG) {
logger(XPSPL_LOG)->debug(sprintf('%s create sub-database', $this->offsetGet($priority)));
}
$this->offsetGet($priority)->set_priority(XPSPL_SUBDATABASE_DEFAULT_PRIORITY);
$db = new Processes();
$db->install($this->offsetGet($priority));
$this->offsetUnset($priority);
$this->offsetSet($priority, $db);
$this->install($process);
}
} else {
if (XPSPL_DEBUG) {
// var_dump($this->_storage);
logger(XPSPL_LOG)->debug(sprintf('%s process installed NODE_COUNT(%s)', $process, $this->count()));
}
// var_dump($priority);
// var_dump($process);
$this->_storage[$priority] = $process;
}
}
/**
* Emits a signal.
*
* @param object $signal \XPSPL\SIG
*
* @return object Event
*/
public function emit(SIG $signal)
{
if (XPSPL_DEBUG) {
logger(XPSPL_LOG)->debug(sprintf('%s emitted', $signal));
}
// Store the history of the signal
if (false !== $this->_history) {
$this->_history[] = [$signal, microtime()];
}
// Set child status
if (count($this->_signal) > 1) {
$signal->set_parent($this->current_signal());
}
// Check if signal is installed
$memory = $this->find_signal_database($signal);
if (null === $memory) {
$memory = new \XPSPL\database\Processes();
} else {
if (XPSPL_DEBUG) {
logger(XPSPL_LOG)->debug('Signal with no installed processes emitted');
}
}
// Evaluate complex signals
$evaluated = $this->evaluate_signals($signal);
if (null !== $evaluated) {
foreach ($evaluated as $_db) {
$memory->merge($_db);
}
}
// Execute if we have processes
if ($memory->count() > 0) {
// Set as currently executing signal
$this->_signal[] = $signal;
// Execute
$this->_execute($signal, $memory);
// Remove once finished
array_pop($this->_signal);
}
return $signal;
}
/**
* Determine if the given database processes are exhausted.
*
* @param object $queue \XPSPL\database\Processes
*
* @return boolean
*/
public function are_processes_exhausted(\XPSPL\database\Processes $database)
{
if ($database->count() === 0) {
return true;
}
$database->reset();
while ($database->valid()) {
if ($database->current() instanceof \XPSPL\database\Processes) {
if (!$this->are_processes_exhausted($database->current())) {
return false;
}
} elseif (!$database->current()->is_exhausted()) {
return false;
}
$database->next();
}
return true;
}
