Extend database factory to accept sync Kotlin MongoDriver instance.

Author: christophstrobl

spring-data-mongodb/src/main/kotlin/org/springframework/data/mongodb/core/SimpleMongoClientDatabaseFactoryExtension.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.mongodb.core
+
+import com.mongodb.kotlin.client.MongoClient
+import org.springframework.beans.DirectFieldAccessor
+
+/**
+ * Extension for [SimpleMongoClientDatabaseFactory] that accepts a [MongoClient].
+ *
+ * @author Christoph Strobl
+ * @since 4.2
+ */
+fun SimpleMongoClientDatabaseFactory(client: MongoClient, database: String): SimpleMongoClientDatabaseFactory =
+	SimpleMongoClientDatabaseFactory(
+		DirectFieldAccessor(client).getPropertyValue("wrapped") as com.mongodb.client.MongoClient,
+		database
+	)

spring-data-mongodb/src/test/kotlin/org/springframework/data/mongodb/core/SimpleMongoClientDatabaseFactoryExtensionTests.kt

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+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.mongodb.core
+
+import com.mongodb.kotlin.client.MongoClient
+import org.bson.Document
+import org.junit.jupiter.api.Test
+import org.springframework.data.mongodb.test.util.Assertions.assertThat
+
+/**
+ * @author Christoph Strobl
+ */
+class SimpleMongoClientDatabaseFactoryExtensionTests {
+
+	@Test // GH-4393
+	fun `extension allows to create SimpleMongoClientDatabaseFactory with a Kotlin Driver instance`() {
+
+		val factory = SimpleMongoClientDatabaseFactory(MongoClient.create(), "test")
+
+		assertThat(factory.mongoDatabase.runCommand(Document("ping", 1))).containsKey("ok")
+	}
+}