[GitHub] [incubator-seatunnel] yx91490 commented on a change in pull request #1390: [Feature][spark-connector-jdbc] add pre sql and post sql #1386

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yx91490 commented on a change in pull request #1390:
URL: https://github.com/apache/incubator-seatunnel/pull/1390#discussion_r819181327



##########
File path: seatunnel-connectors/seatunnel-connector-spark-jdbc/src/main/scala/org/apache/seatunnel/spark/JdbcConfigs.scala
##########
@@ -0,0 +1,81 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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
+ *
+ *    http://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.apache.seatunnel.spark

Review comment:
       is JdbcConfigs.scala will be shared by source and sink? if not, maybe can move to org.apache.seatunnel.spark.sink package.

##########
File path: seatunnel-connectors/seatunnel-connector-spark-jdbc/src/main/scala/org/apache/seatunnel/spark/sink/Jdbc.scala
##########
@@ -16,47 +16,98 @@
  */
 package org.apache.seatunnel.spark.sink
 
-import scala.collection.JavaConversions._
-
+import org.apache.commons.collections.CollectionUtils
 import org.apache.seatunnel.common.config.CheckConfigUtil.checkAllExists
 import org.apache.seatunnel.common.config.CheckResult
 import org.apache.seatunnel.shade.com.typesafe.config.ConfigFactory
-import org.apache.seatunnel.spark.SparkEnvironment
+import org.apache.seatunnel.spark.{JdbcConfigs, SparkEnvironment}
 import org.apache.seatunnel.spark.batch.SparkBatchSink
-import org.apache.spark.sql.{Dataset, Row}
 import org.apache.spark.sql.execution.datasources.jdbc2.JDBCSaveMode
+import org.apache.spark.sql.{Dataset, Row}
+import org.slf4j.{Logger, LoggerFactory}
+
+import java.sql.{Connection, DriverManager, Statement}
+import scala.collection.JavaConversions._
 
 class Jdbc extends SparkBatchSink {
 
+  private val LOG: Logger = LoggerFactory.getLogger(classOf[Jdbc])
+
+  private var jdbcConfigs: JdbcConfigs = _
+
+  private def getConnection(): Connection = {
+    Class.forName(jdbcConfigs.driver)
+    val connection = DriverManager.getConnection(jdbcConfigs.url, jdbcConfigs.user, jdbcConfigs.password)

Review comment:
       It seems that connection will be created about 3 times at worst, can connection be reused in the same job?




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