[api] NotificationGroupManagerImpl is not part of platform API

GitOrigin-RevId: 7b8409537fd307a841f8d2b03ff600271d8478d4

platform/ide-core-impl/api-dump-unreviewed.txt

@@ -329,12 +329,6 @@ f:com.intellij.notification.impl.NotificationGroupEP
 - getDisplayName(com.intellij.openapi.extensions.PluginDescriptor):java.lang.String
 - getDisplayType():com.intellij.notification.NotificationDisplayType
 - setPluginDescriptor(com.intellij.openapi.extensions.PluginDescriptor):V
-f:com.intellij.notification.impl.NotificationGroupManagerImpl
-- com.intellij.notification.NotificationGroupManager
-- getNotificationGroup(java.lang.String):com.intellij.notification.NotificationGroup
-- getRegisteredNotificationGroups():java.util.Collection
-- isGroupRegistered(java.lang.String):Z
-- isRegisteredNotificationId(java.lang.String):Z
 f:com.intellij.notification.impl.NotificationParentGroupBean
 - id:java.lang.String
 - parentId:java.lang.String

platform/ide-core-impl/src/com/intellij/notification/impl/NotificationGroupManagerImpl.kt

@@ -7,30 +7,22 @@ import com.intellij.notification.NotificationGroupManager
 import com.intellij.openapi.diagnostic.logger
 import com.intellij.openapi.extensions.ExtensionPointListener
 import com.intellij.openapi.extensions.PluginDescriptor
-import com.intellij.util.concurrency.SynchronizedClearableLazy
 import java.util.concurrent.ConcurrentHashMap
 
 private val LOG = logger<NotificationGroupManagerImpl>()
 
-class NotificationGroupManagerImpl private constructor() : NotificationGroupManager {
-  private val registeredGroups = computeGroups()
+internal class NotificationGroupManagerImpl() : NotificationGroupManager {
+  private val registeredGroups: MutableMap<String, NotificationGroup> = computeGroups()
 
-  private val registeredNotificationIds = SynchronizedClearableLazy<Set<String>> {
-    val result = HashSet<String>()
-    NotificationGroupEP.EP_NAME.processWithPluginDescriptor { extension, pluginDescriptor ->
-      if (extension.notificationIds != null && PluginManagerCore.isDevelopedByJetBrains(pluginDescriptor)) {
-        result.addAll(extension.notificationIds!!)
-      }
-    }
-    result
-  }
+  @Volatile
+  private var registeredNotificationIds: Set<String>? = null
 
   init {
     NotificationGroupEP.EP_NAME.addExtensionPointListener(object : ExtensionPointListener<NotificationGroupEP> {
       override fun extensionAdded(extension: NotificationGroupEP, pluginDescriptor: PluginDescriptor) {
         registerNotificationGroup(extension, pluginDescriptor, registeredGroups)
         if (extension.notificationIds != null) {
-          registeredNotificationIds.drop()
+          registeredNotificationIds = null
         }
       }
 
@@ -40,19 +32,33 @@ class NotificationGroupManagerImpl private constructor() : NotificationGroupMana
           registeredGroups.remove(extension.id)
         }
         if (extension.notificationIds != null) {
-          registeredNotificationIds.drop()
+          registeredNotificationIds = null
         }
       }
     }, null)
   }
 
+  private fun getNotificationIds(): Set<String> {
+    val existing = registeredNotificationIds
+    if (existing != null) return existing
+
+    val result = HashSet<String>()
+    NotificationGroupEP.EP_NAME.processWithPluginDescriptor { extension, pluginDescriptor ->
+      if (extension.notificationIds != null && PluginManagerCore.isDevelopedByJetBrains(pluginDescriptor)) {
+        result.addAll(extension.notificationIds!!)
+      }
+    }
+    registeredNotificationIds = result
+    return result
+  }
+
   override fun getNotificationGroup(groupId: String): NotificationGroup? = registeredGroups[groupId]
 
   override fun isGroupRegistered(groupId: String): Boolean = registeredGroups.containsKey(groupId)
 
   override fun getRegisteredNotificationGroups(): MutableCollection<NotificationGroup> = registeredGroups.values
 
-  override fun isRegisteredNotificationId(notificationId: String): Boolean = registeredNotificationIds.value.contains(notificationId)
+  override fun isRegisteredNotificationId(notificationId: String): Boolean = getNotificationIds().contains(notificationId)
 }
 
 private fun computeGroups(): MutableMap<String, NotificationGroup> {