protected function createAndCache($what)
{
if (null !== $this->{$what}) {
return $this->{$what};
}
$cacheClass = $this->options["{$what}_cache_class"];
if (null === $this->options['cache_dir'] || null === $cacheClass) {
return $this->{$what} = new $this->options["{$what}_class"]($this->getRouteCollection(), $this->context);
}
$cache = new ExpirableConfigCache($this->options['cache_dir'] . '/' . $cacheClass . '.php', $this->options['debug'], $this->metaQuery->getLastTouched());
if (!$cache->isFresh()) {
$cs = new CriticalSection();
$cs->setLogger($this->logger);
$self = $this;
$cs->execute(__FILE__, function () use($what, $self, $cache) {
if (!$cache->isFresh()) {
$self->dumpIntoCache($cache, $what);
} else {
$self->debug("Cache has been refreshed while we were waiting.");
}
});
}
if (!class_exists($cacheClass)) {
require $cache->getPath();
}
return $this->{$what} = new $cacheClass($this->context);
}
/**
* This ensures that the critical section is re-entrant as documented.
*/
public function testCallbackCanAcquireSameLockAgain()
{
$this->criticalSection->execute(__DIR__ . '/my/virtual/file1', function () {
$this->criticalSection->execute(__DIR__ . '/my/virtual/file1', $this->createCallbackThatMustBeInvoked());
});
}