Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/20382#discussion_r164944362
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/TextSocketReader.scala
---
@@ -0,0 +1,133 @@
+/*
+ * 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.spark.sql.execution.streaming
+
+import java.io.{BufferedReader, InputStreamReader, IOException}
+import java.net.Socket
+import java.sql.Timestamp
+import java.util.Calendar
+import javax.annotation.concurrent.GuardedBy
+
+import scala.collection.mutable.ListBuffer
+
+import org.apache.spark.internal.Logging
+
+trait TextSocketReader extends Logging {
--- End diff --
Please add docs!! This is a base interface used by two source
implementations
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