[BC break] Move doctrine/cache to optional dependencies

UPGRADE-2.16.md

@@ -0,0 +1,10 @@
+# UPGRADE FROM 2.15 to 2.16
+
+## Package `doctrine/cache`
+
+The package `doctrine/cache` is no longer required.
+
+If you use `Doctrine\ODM\MongoDB\Configuration::getMetadataCacheImpl()`,
+then you need to require `doctrine/cache` explicitly in your `composer.json`;
+or use `Doctrine\ODM\MongoDB\Configuration::getMetadataCache()` instead.
+

composer.json

@@ -28,7 +28,6 @@
     "require": {
         "php": "^8.1",
         "ext-mongodb": "^1.21 || ^2.0",
-        "doctrine/cache": "^1.11 || ^2.0",
         "doctrine/collections": "^1.5 || ^2.0",
         "doctrine/event-manager": "^1.0 || ^2.0",
         "doctrine/instantiator": "^1.1 || ^2",
@@ -45,6 +44,7 @@
     "require-dev": {
         "ext-bcmath": "*",
         "doctrine/annotations": "^1.12 || ^2.0",
+        "doctrine/cache": "^2.0",
         "doctrine/coding-standard": "^14.0",
         "doctrine/orm": "^3.2",
         "jmikola/geojson": "^1.0",
@@ -58,7 +58,9 @@
         "symfony/uid": "^5.4 || ^6.0 || ^7.0 || ^8.0"
     },
     "conflict": {
-        "doctrine/annotations": "<1.12 || >=3.0"
+        "doctrine/annotations": "<1.12 || >=3.0",
+        "doctrine/cache": "<1.11",
+        "doctrine/mongodb-odm-bundle": "<5"
     },
     "suggest": {
         "doctrine/annotations": "For annotation mapping support",

src/Configuration.php

@@ -276,8 +276,13 @@ public function getMetadataDriverImpl(): ?MappingDriver
         return $this->attributes['metadataDriverImpl'] ?? null;
     }
 
+    /** @deprecated Since 2.2, use {@see getMetadataCache()} instead. */
     public function getMetadataCacheImpl(): ?Cache
     {
+        if (! class_exists(DoctrineProvider::class)) {
+            throw new LogicException('The "doctrine/cache" package is deprecated and no longer required by "doctrine/mongodb-odm". Use "getMetadataCache" instead.');
+        }
+
         trigger_deprecation(
             'doctrine/mongodb-odm',
             '2.2',
@@ -289,6 +294,7 @@ public function getMetadataCacheImpl(): ?Cache
         return $this->attributes['metadataCacheImpl'] ?? null;
     }
 
+    /** @deprecated Since 2.2, use {@see setMetadataCache()} instead. */
     public function setMetadataCacheImpl(Cache $cacheImpl): void
     {
         trigger_deprecation(
@@ -310,7 +316,12 @@ public function getMetadataCache(): ?CacheItemPoolInterface
 
     public function setMetadataCache(CacheItemPoolInterface $cache): void
     {
-        $this->metadataCache                   = $cache;
+        $this->metadataCache = $cache;
+
+        if (! class_exists(DoctrineProvider::class)) {
+            return;
+        }
+
         $this->attributes['metadataCacheImpl'] = DoctrineProvider::wrap($cache);
     }