Cleanup MongoDB module (#227)

* Hide dependency of MongoDB

* Upgrade to Spring Boot 2.5.2

* Use AbstractMongoClientConfiguration

* Fix tests

* Replace SpringBootApplication by Configuration

* Rename AppConfig to MongoConfig

Author: mincong-h

spring-mongo/pom.xml

@@ -15,7 +15,7 @@
   <properties>
     <logback.version>1.2.3</logback.version>
     <slf4j.version>1.7.30</slf4j.version>
-    <spring.boot.version>2.5.1</spring.boot.version>
+    <spring.boot.version>2.5.2</spring.boot.version>
   </properties>
 
   <dependencies>
@@ -30,11 +30,6 @@
       <version>${spring.boot.version}</version>
     </dependency>
 
-    <dependency>
-      <groupId>org.mongodb</groupId>
-      <artifactId>mongodb-driver-sync</artifactId>
-      <version>${mongo.driver.version}</version>
-    </dependency>
     <dependency>
       <groupId>org.projectlombok</groupId>
       <artifactId>lombok</artifactId>

spring-mongo/src/main/java/io/mincong/spring/mongodb/AppConfig.java

@@ -0,0 +1,20 @@
+package io.mincong.spring.mongodb;
+
+import com.mongodb.client.MongoClient;
+import com.mongodb.client.MongoClients;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.mongodb.config.AbstractMongoClientConfiguration;
+
+@Configuration
+public class MongoConfig extends AbstractMongoClientConfiguration {
+
+  @Override
+  public MongoClient mongoClient() {
+    return MongoClients.create("mongodb://localhost:27017");
+  }
+
+  @Override
+  protected String getDatabaseName() {
+    return "demo";
+  }
+}

spring-mongo/src/main/java/io/mincong/spring/mongodb/MongoConfig.java

@@ -8,11 +8,11 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.data.mongo.DataMongoTest;
+import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.data.mongodb.core.MongoOperations;
 import org.springframework.data.mongodb.core.query.Query;
 
-@DataMongoTest
+@SpringBootTest(classes = MongoConfig.class)
 class PersonOperationsIT {
   @Autowired MongoOperations operations;
 

spring-mongo/src/test/java/io/mincong/spring/mongodb/PersonOperationsIT.java

@@ -10,7 +10,7 @@
 import org.springframework.data.mongodb.core.MongoOperations;
 import org.springframework.data.mongodb.core.query.Query;
 
-@SpringBootTest(classes = {PersonService.class, AppConfig.class})
+@SpringBootTest(classes = {PersonService.class, MongoConfig.class})
 class PersonServiceIT {
 
   @Autowired MongoOperations operations;