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https://issues.apache.org/jira/browse/FLINK-8866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16524007#comment-16524007
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ASF GitHub Bot commented on FLINK-8866:
---------------------------------------

Github user twalthr commented on a diff in the pull request:

    https://github.com/apache/flink/pull/6201#discussion_r198207327
  
    --- Diff: 
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/connector/TableSinkFactoryServiceTest.scala
 ---
    @@ -0,0 +1,84 @@
    +/*
    + * 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.flink.table.connector
    +
    +import org.apache.flink.table.api.{NoMatchingTableConnectorException, 
TableException, ValidationException}
    +import org.apache.flink.table.descriptors.ConnectorDescriptorValidator._
    +import org.apache.flink.table.descriptors.FormatDescriptorValidator._
    +import org.apache.flink.table.descriptors.TableDescriptorValidator
    +import org.junit.Assert._
    +import org.junit.Test
    +
    +import scala.collection.mutable
    +
    +class TableSinkFactoryServiceTest {
    +  @Test
    +  def testValidProperties(): Unit = {
    +    val props = properties()
    +    
assertTrue(TableSinkFactoryService.findAndCreateTableConnector(props.toMap) != 
null)
    +  }
    +
    +  @Test(expected = classOf[NoMatchingTableConnectorException])
    +  def testInvalidContext(): Unit = {
    +    val props = properties()
    +    props.put(CONNECTOR_TYPE, "FAIL")
    +    TableSinkFactoryService.findAndCreateTableConnector(props.toMap)
    +  }
    +
    +  @Test
    +  def testDifferentContextVersion(): Unit = {
    +    val props = properties()
    +    props.put(CONNECTOR_PROPERTY_VERSION, "2")
    +    // the table source should still be found
    +    
assertTrue(TableSinkFactoryService.findAndCreateTableConnector(props.toMap) != 
null)
    +  }
    +
    +  @Test(expected = classOf[ValidationException])
    +  def testUnsupportedProperty(): Unit = {
    +    val props = properties()
    +    props.put("format.path_new", "/new/path")
    +    TableSinkFactoryService.findAndCreateTableConnector(props.toMap)
    +  }
    +
    +  @Test(expected = classOf[TableException])
    +  def testFailingFactory(): Unit = {
    +    val props = properties()
    +    props.put("failing", "true")
    +    TableSinkFactoryService.findAndCreateTableConnector(props.toMap)
    +  }
    +
    +  private def properties(): mutable.Map[String, String] = {
    +    val properties = mutable.Map[String, String]()
    +    properties.put(TableDescriptorValidator.TABLE_TYPE,
    +      TableDescriptorValidator.TABLE_TYPE_VALUE_SINK)
    +    properties.put(CONNECTOR_TYPE, "test")
    --- End diff --
    
    I would use strings here for everything (not the variables). This allows 
tests to fail if we refactor one of the properties.


> Create unified interfaces to configure and instatiate TableSinks
> ----------------------------------------------------------------
>
>                 Key: FLINK-8866
>                 URL: https://issues.apache.org/jira/browse/FLINK-8866
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API & SQL
>            Reporter: Timo Walther
>            Assignee: Shuyi Chen
>            Priority: Major
>              Labels: pull-request-available
>
> Similar to the efforts done in FLINK-8240. We need unified ways to configure 
> and instantiate TableSinks. Among other applications, this is necessary in 
> order to declare table sinks in an environment file of the SQL client. Such 
> that the sink can be used for {{INSERT INTO}} statements.
> Below are a few major changes in mind. 
> 1) Add TableSinkFactory/TableSinkFactoryService similar to 
> TableSourceFactory/TableSourceFactoryService
> 2) Add a common property called "type" with values (source, sink and both) 
> for both TableSource and TableSink.
> 3) in yaml file, replace "sources" with "tables", and use tableType to 
> identify whether it's source or sink.



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