add mongo module

database/mongodb/build.gradle

@@ -0,0 +1,8 @@
+
+dependencies {
+    implementation project(":")
+    // https://mvnrepository.com/artifact/org.mongodb/mongo-java-driver
+    compile group: 'org.mongodb', name: 'mongo-java-driver', version: '3.12.1'
+    // 数据库与序列化部分可选
+    api group: 'org.jetbrains.kotlin', name: 'kotlin-reflect', version: kotlinVersion
+}

database/mongodb/src/main/kotlin/cn/tursom/mongodb/MongoConnection.kt

@@ -0,0 +1,16 @@
+package cn.tursom.mongodb
+
+import cn.tursom.mongodb.annotation.Collection
+import com.mongodb.MongoClient
+
+interface MongoConnection {
+  val client: MongoClient
+
+  fun <T> createTemplate(clazz: Class<T>): MongoTemplate<T>
+
+  companion object {
+    fun collectionName(clazz: Class<*>): String {
+      return clazz.getAnnotation(Collection::class.java)?.name ?: clazz.simpleName
+    }
+  }
+}

database/mongodb/src/main/kotlin/cn/tursom/mongodb/MongoTemplate.kt

@@ -0,0 +1,5 @@
+package cn.tursom.mongodb
+
+interface MongoTemplate<T> {
+  fun save(entity: T)
+}

database/mongodb/src/main/kotlin/cn/tursom/mongodb/annotation/Collection.kt

@@ -0,0 +1,5 @@
+package cn.tursom.mongodb.annotation
+
+@Retention(AnnotationRetention.RUNTIME)
+@Target(AnnotationTarget.CLASS)
+annotation class Collection(val name: String)

database/mongodb/src/main/kotlin/cn/tursom/mongodb/impl/MongoConnectionImpl.kt

@@ -0,0 +1,21 @@
+package cn.tursom.mongodb.impl
+
+import cn.tursom.mongodb.MongoConnection
+import cn.tursom.mongodb.MongoTemplate
+import com.mongodb.MongoClient
+
+class MongoConnectionImpl(
+  db: String,
+  val host: String = "127.0.0.1",
+  val port: Int = 27017
+) : MongoConnection {
+  override val client: MongoClient = MongoClient(host, port)
+
+  val db = client.getDatabase(db)
+
+  override fun <T> createTemplate(clazz: Class<T>): MongoTemplate<T> {
+    db.createCollection(MongoConnection.collectionName(clazz))
+    TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+  }
+
+}

database/mongodb/src/main/kotlin/cn/tursom/mongodb/impl/MongoTemplateImpl.kt

@@ -0,0 +1,11 @@
+package cn.tursom.mongodb.impl
+
+import cn.tursom.mongodb.MongoTemplate
+
+class MongoTemplateImpl<T>(
+
+) : MongoTemplate<T> {
+  override fun save(entity: T) {
+    TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+  }
+}