/**
* Builds a configured data backend.
*
* If configured this method would automatically install the backend. I.e. a first
* call will take some amount of time.
*
* @return DataBackend
* @throws DataBackendException
*/
private function buildDataBackend()
{
$configuration = ConfigurationRegistry::getConfiguration();
$backend = $this->makeDataBackend();
// Installation
if ($configuration->isAutomaticInstallation() && !$backend->isInstalled()) {
$lock = new Lock(self::INSTALL_LOCK);
$lock->executeOnce(function () use($backend) {
$backend->install();
});
}
// Update hook
register_shutdown_function(array($this, "applyUpdatePlan"), $backend);
return $backend;
}
/**
* Tests executeOnce().
*
* @see Lock::executeOnce()
*/
public function testExecuteOnce()
{
$name = __FUNCTION__;
$isExecuted = false;
$isExecutedCheck = false;
$lock = new Lock($name);
$lock->executeOnce(function () use(&$isExecuted, &$isExecutedCheck, $name) {
$isExecuted = true;
$checkLock = new Lock($name);
$checkLock->nonblockingExecuteOnce(function () use(&$isExecutedCheck) {
$isExecutedCheck = true;
});
});
$this->assertTrue($isExecuted);
$this->assertFalse($isExecutedCheck);
}
