Invalid cache before expiration

README.md

@@ -81,3 +81,19 @@ foreach ($exchange as $code => $property) {
     var_dump($property);
 }
 ```
+
+## Caching
+
+The cache invalid automatic at some time, defined by property `Driver::$refresh`. From this property is counted time to live. Little better is invalid cache by cron. Because one request on server does not lock other requests. Let's run cron max. 15 minutes before invalidate cache.
+```php
+use h4kuna\Exchange\RatingList\RatingListCache;
+use h4kuna\Exchange\RatingList\CacheEntity;
+use h4kuna\Exchange\Driver\Cnb\Day;
+
+/** @var RatingListCache $ratingListCache */
+$ratingListCache->rebuild(new CacheEntity(null, Day::class));
+```
+
+In example, is used `h4kuna\Exchange\Driver\Cnb\Day::$refresh` is defined at 15:00. Run cron 14:55 every day.
+
+

src/Driver/Cnb/Day.php

@@ -12,6 +12,8 @@ class Day extends Exchange\Driver\Driver
 {
 	// private const URL_DAY_OTHER = 'http://www.cnb.cz/cs/financni_trhy/devizovy_trh/kurzy_ostatnich_men/kurzy.txt';
 
+	public static string $url = 'https://www.cnb.cz/cs/financni_trhy/devizovy_trh/kurzy_devizoveho_trhu/denni_kurz.txt';
+
 	protected string $refresh = 'today 15:00:00';
 
 	protected string $timeZone = 'Europe/Prague';
@@ -47,7 +49,7 @@ protected function createProperty($row): Property
 
 	protected function prepareUrl(?\DateTimeInterface $date): string
 	{
-		$url = 'https://www.cnb.cz/cs/financni_trhy/devizovy_trh/kurzy_devizoveho_trhu/denni_kurz.txt';
+		$url = self::$url;
 
 		if ($date === null) {
 			return $url;

src/Driver/Ecb/Day.php

@@ -12,6 +12,8 @@ class Day extends Exchange\Driver\Driver
 {
 	protected string $timeZone = 'Europe/Berlin';
 
+	public static string $url = 'http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml';
+
 
 	/**
 	 * @return iterable<\SimpleXMLElement>
@@ -55,7 +57,7 @@ protected function prepareUrl(?\DateTimeInterface $date): string
 			throw new Exchange\Exceptions\InvalidStateException('Ecb does not support history.');
 		}
 
-		return 'http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml';
+		return self::$url;
 	}
 
 }

src/RatingList/RatingListCache.php

@@ -16,7 +16,9 @@
 
 final class RatingListCache
 {
-	public int $floatTtl = 600;
+	public int $floatTtl = 600; // seconds -> 10 minutes
+
+	private const BEFORE_EXPIRATION_CACHE = 900; // seconds -> 15 minutes
 
 
 	/**
@@ -110,7 +112,7 @@ private function buildCache(CacheEntity $cacheEntity, CacheInterface $cache, str
 
 	private static function countTTL(DateTime $dateTime): int
 	{
-		if ($dateTime->getTimestamp() < time()) {
+		if ($dateTime->getTimestamp() < (time() - self::BEFORE_EXPIRATION_CACHE)) {
 			$dateTime->modify('+1 day');
 		}