/**
* @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;
}
private function addSplitsInCache()
{
$splitChanges = file_get_contents(__DIR__ . "/files/splitChanges.json");
$this->assertJson($splitChanges);
$splitCache = new SplitCache();
$splitChanges = json_decode($splitChanges, true);
$splits = $splitChanges['splits'];
foreach ($splits as $split) {
$splitName = $split['name'];
$this->assertTrue($splitCache->addSplit($splitName, json_encode($split)));
}
}
public function execute()
{
//Fetching the Splits changes
$splitChanges = $this->getSplitClient()->getSplitChanges();
$splits = isset($splitChanges['splits']) ? $splitChanges['splits'] : array();
$splitCache = new SplitCache();
if (!empty($splits)) {
foreach ($splits as $split) {
if (!is_array($split) || !isset($split['name']) || !isset($split['conditions']) || !isset($split['status'])) {
continue;
//continue with next Split
}
$this->logger()->debug(print_r($split, true));
$splitName = $split['name'];
$splitStatus = $split['status'];
$splitConditions = $split['conditions'];
foreach ($splitConditions as $condition) {
foreach ($condition['matcherGroup']['matchers'] as $matcher) {
if ($matcher['matcherType'] == "IN_SEGMENT") {
//Register segment to retrieve Segment Data.
SegmentCache::registerSegment($matcher['userDefinedSegmentMatcherData']['segmentName']);
}
}
}
if ($splitStatus == 'ACTIVE') {
//Update Cache
$splitCache->addSplit($splitName, json_encode($split));
} else {
//Delete item from cache
$splitCache->removeSplit($splitName);
}
}
}
if (isset($splitChanges['till'])) {
$till = $splitChanges['till'];
$this->logger()->debug("Splits Till value: {$till}");
//Updating next since (till) value.
if ($till != $splitCache->getChangeNumber()) {
$splitCache->setChangeNumber($till);
}
}
}
/**
* @depends testDiLog
* @depends testDiCache
*/
public function testSplitCacheInterface()
{
$splitChanges = file_get_contents(__DIR__ . "/../../files/splitChanges.json");
$this->assertJson($splitChanges);
$splitCache = new SplitCache();
$splitChanges = json_decode($splitChanges, true);
$splits = $splitChanges['splits'];
$split = $splits[0];
$splitName = $split['name'];
$this->assertTrue($splitCache->addSplit($splitName, json_encode($split)));
$this->assertEquals(strlen(json_encode($split)), strlen($splitCache->getSplit($splitName)));
$this->assertTrue($splitCache->removeSplit($splitName));
$this->assertTrue($splitCache->setChangeNumber($splitChanges['till']));
$this->assertEquals($splitChanges['till'], $splitCache->getChangeNumber());
}
private function evalTreatment($matchingKey, $bucketingKey, $featureName, array $attributes = null)
{
$split = null;
$do_evaluation = false;
$cachedFeature = $this->getCachedFeature($featureName);
if ($cachedFeature !== null) {
$split = $cachedFeature;
$do_evaluation = true;
} else {
$splitCacheKey = SplitCache::getCacheKeyForSplit($featureName);
$splitCachedItem = SplitApp::cache()->getItem($splitCacheKey);
if ($splitCachedItem->isHit()) {
SplitApp::logger()->info("{$featureName} is present on cache");
$splitRepresentation = $splitCachedItem->get();
$split = new Split(json_decode($splitRepresentation, true));
$this->cacheFeature($featureName, $split);
$do_evaluation = true;
}
}
if ($do_evaluation) {
//If the split was killed, log the impression and return default treatment.
if ($split->killed()) {
$defaultTreatment = $split->getDefaultTratment();
$chn = $split->getChangeNumber();
$this->logImpression($matchingKey, $featureName, $defaultTreatment, ImpressionLabel::KILLED, $chn);
return $defaultTreatment;
}
$timeStart = Metrics::startMeasuringLatency();
$treatment = Engine::getTreatment($matchingKey, $bucketingKey, $split, $attributes);
$latency = Metrics::calculateLatency($timeStart);
//If the given key doesn't match on any condition, default treatment is returned
$impressionLabel = '';
if ($treatment == null) {
$treatment = $split->getDefaultTratment();
$impressionLabel = ImpressionLabel::NO_CONDITION_MATCHED;
}
//Registering latency value
MetricsCache::addLatencyOnBucket(Metrics::MNAME_SDK_GET_TREATMENT, Metrics::getBucketForLatencyMicros($latency));
SplitApp::logger()->info("*Treatment for {$matchingKey} in {$split->getName()} is: {$treatment}");
//Logging treatment impressions
$this->logImpression($matchingKey, $featureName, $treatment, $impressionLabel, $split->getChangeNumber());
//Returning treatment.
return $treatment;
}
// Split not found impression
$this->logImpression($matchingKey, $featureName, TreatmentEnum::CONTROL, ImpressionLabel::SPLIT_NOT_FOUND);
SplitApp::logger()->warning("The SPLIT definition for '{$featureName}' has not been found'");
return TreatmentEnum::CONTROL;
}
/**
* @param $featureName
* @return null|SplitView
*/
public function split($featureName)
{
return $this->getSplitByCacheKey(SplitCache::getCacheKeyForSplit($featureName));
}
