/**
* @return bool|null
*/
public function getSplitChanges()
{
//Fetching next since value from cache.
$splitCache = new SplitCache();
$since_cached_value = $splitCache->getChangeNumber();
Di::getLogger()->info("SINCE CACHED VALUE: {$since_cached_value}");
$servicePath = $this->servicePath . '?since=' . $since_cached_value;
Di::getLogger()->info("SERVICE PATH: {$servicePath}");
$response = $this->get($servicePath);
if ($response->isSuccessful()) {
$splitChanges = json_decode($response->getBody(), true);
if (isset($splitChanges['since']) && isset($splitChanges['till']) && $splitChanges['since'] == $splitChanges['till']) {
Di::getLogger()->info("Registering splits ready mark");
$dateTimeUTC = new \DateTime("now", new \DateTimeZone("UTC"));
$bur = new BlockUntilReadyCache();
$bur->setReadySplits($dateTimeUTC->getTimestamp());
}
$splits = isset($splitChanges['splits']) ? $splitChanges['splits'] : false;
if (!$splits) {
Di::getLogger()->notice("Splits returned by the server are empty");
return false;
}
return $splitChanges;
}
return false;
}
public function execute()
{
$registeredSegments = $this->cache()->getItemsOnList(SegmentCache::getCacheKeyForRegisterSegments());
$log = $this->logger();
if (is_array($registeredSegments) && !empty($registeredSegments)) {
foreach ($registeredSegments as $segmentName) {
$log->info(">>> Fetching data from segment: {$segmentName}");
$timeStart = Latency::startMeasuringLatency();
while (true) {
$timeStartPart = Latency::startMeasuringLatency();
if (!$this->getSplitClient()->updateSegmentChanges($segmentName)) {
$timeItTook = Latency::calculateLatency($timeStartPart);
$log->debug("Fetching segment last part ({$segmentName}) took {$timeItTook} microseconds");
$greedyTime = Latency::calculateLatency($timeStart);
$log->info("Finished fetching whole segment {$segmentName}, took {$greedyTime} microseconds");
break;
}
$timeItTook = Latency::calculateLatency($timeStartPart);
$log->debug("Fetching segment part ({$segmentName}) took {$timeItTook} microseconds");
//Sleep 1/2 second
usleep(500000);
}
}
// Setting Segments ready mark
$dateTimeUTC = new \DateTime("now", new \DateTimeZone("UTC"));
$bur = new BlockUntilReadyCache();
$bur->setReadySegments($dateTimeUTC->getTimestamp());
}
}
/**
* @depends testDiLog
* @depends testDiCache
*/
public function testBlockUntilReadyCacheInterface()
{
$dateTimeUTC = new \DateTime("now", new \DateTimeZone("UTC"));
$deltaTime = 100;
$splitsTimestamp = $dateTimeUTC->getTimestamp();
$segmentsTimestamp = $dateTimeUTC->getTimestamp() + $deltaTime;
$bur = new BlockUntilReadyCache();
$bur->setReadySplits($splitsTimestamp);
$bur->setReadySegments($segmentsTimestamp);
//Checking
$this->assertEquals($splitsTimestamp, $bur->getReadySplits());
$this->assertEquals($segmentsTimestamp, $bur->getReadySegments());
$this->assertEquals(min($splitsTimestamp, $segmentsTimestamp), $bur->getReadyCheckpoint());
}
/**
* @param $timeout
* @return bool
*/
private function blockUntilReady($timeout)
{
$bur = new BlockUntilReadyCache();
$startTime = Latency::startMeasuringLatency();
do {
$lastreadyCheckpoint = $bur->getReadyCheckpoint();
if ($lastreadyCheckpoint > 0) {
return true;
}
// Checkpoint in milliseconds
$checkPoint = Latency::calculateLatency($startTime) / 1000;
// waiting 10 milliseconds
usleep(10000);
} while ($checkPoint < $timeout);
return false;
}
