[SPARK-10521][SQL] Utilize Docker for test DB2 JDBC Dialect support

Add integration tests based on docker to test DB2 JDBC dialect support

Author: Luciano Resende <lresende@apache.org>

Closes #9893 from lresende/SPARK-10521.

external/docker-integration-tests/pom.xml

@@ -34,6 +34,13 @@
     <sbt.project.name>docker-integration-tests</sbt.project.name>
   </properties>
 
+  <repositories>
+    <repository>
+      <id>db2</id>
+      <url>https://app.camunda.com/nexus/content/repositories/public/</url>
+    </repository>
+  </repositories>
+
   <dependencies>
     <dependency>
       <groupId>com.spotify</groupId>
@@ -180,5 +187,28 @@
       </exclusions>
     </dependency>
     <!-- End Jersey dependencies -->
+
+    <!-- DB2 JCC driver manual installation instructions
+
+       You can build this datasource if you:
+        1) have the DB2 artifacts installed in a local repo and supply the URL:
+          -Dmaven.repo.drivers=http://my.local.repo
+
+        2) have a copy of the DB2 JCC driver and run the following commands :
+          mvn install:install-file -Dfile=${path to db2jcc4.jar} \
+            -DgroupId=com.ibm.db2 \
+            -DartifactId=db2jcc4 \
+            -Dversion=10.5 \
+            -Dpackaging=jar
+
+       Note: IBM DB2 JCC driver is available for download at
+          http://www-01.ibm.com/support/docview.wss?uid=swg21363866
+     -->
+    <dependency>
+      <groupId>com.ibm.db2.jcc</groupId>
+      <artifactId>db2jcc4</artifactId>
+      <version>10.5.0.5</version>
+      <type>jar</type>
+    </dependency>
   </dependencies>
 </project>

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/DB2IntegrationSuite.scala

+/*
+ * 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.jdbc
+
+import java.math.BigDecimal
+import java.sql.{Connection, Date, Timestamp}
+import java.util.Properties
+
+import org.scalatest._
+
+import org.apache.spark.tags.DockerTest
+
+@DockerTest
+@Ignore // AMPLab Jenkins needs to be updated before shared memory works on docker
+class DB2IntegrationSuite extends DockerJDBCIntegrationSuite {
+  override val db = new DatabaseOnDocker {
+    override val imageName = "lresende/db2express-c:10.5.0.5-3.10.0"
+    override val env = Map(
+      "DB2INST1_PASSWORD" -> "rootpass",
+      "LICENSE" -> "accept"
+    )
+    override val usesIpc = true
+    override val jdbcPort: Int = 50000
+    override def getJdbcUrl(ip: String, port: Int): String =
+      s"jdbc:db2://$ip:$port/foo:user=db2inst1;password=rootpass;"
+    override def getStartupProcessName: Option[String] = Some("db2start")
+  }
+
+  override def dataPreparation(conn: Connection): Unit = {
+    conn.prepareStatement("CREATE TABLE tbl (x INTEGER, y VARCHAR(8))").executeUpdate()
+    conn.prepareStatement("INSERT INTO tbl VALUES (42,'fred')").executeUpdate()
+    conn.prepareStatement("INSERT INTO tbl VALUES (17,'dave')").executeUpdate()
+
+    conn.prepareStatement("CREATE TABLE numbers (onebit BIT(1), tenbits BIT(10), "
+      + "small SMALLINT, med MEDIUMINT, nor INT, big BIGINT, deci DECIMAL(40,20), flt FLOAT, "
+      + "dbl DOUBLE)").executeUpdate()
+    conn.prepareStatement("INSERT INTO numbers VALUES (b'0', b'1000100101', "
+      + "17, 77777, 123456789, 123456789012345, 123456789012345.123456789012345, "
+      + "42.75, 1.0000000000000002)").executeUpdate()
+
+    conn.prepareStatement("CREATE TABLE dates (d DATE, t TIME, dt DATETIME, ts TIMESTAMP, "
+      + "yr YEAR)").executeUpdate()
+    conn.prepareStatement("INSERT INTO dates VALUES ('1991-11-09', '13:31:24', "
+      + "'1996-01-01 01:23:45', '2009-02-13 23:31:30', '2001')").executeUpdate()
+
+    // TODO: Test locale conversion for strings.
+    conn.prepareStatement("CREATE TABLE strings (a CHAR(10), b VARCHAR(10), c CLOB, d BLOB, "
+      + "e CHAR FOR BIT DATA)").executeUpdate()
+    conn.prepareStatement("INSERT INTO strings VALUES ('the', 'quick', 'brown', 'fox', 'jumps'")
+      .executeUpdate()
+  }
+
+  test("Basic test") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "tbl", new Properties)
+    val rows = df.collect()
+    assert(rows.length == 2)
+    val types = rows(0).toSeq.map(x => x.getClass.toString)
+    assert(types.length == 2)
+    assert(types(0).equals("class java.lang.Integer"))
+    assert(types(1).equals("class java.lang.String"))
+  }
+
+  test("Numeric types") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "numbers", new Properties)
+    val rows = df.collect()
+    assert(rows.length == 1)
+    val types = rows(0).toSeq.map(x => x.getClass.toString)
+    assert(types.length == 9)
+    assert(types(0).equals("class java.lang.Boolean"))
+    assert(types(1).equals("class java.lang.Long"))
+    assert(types(2).equals("class java.lang.Integer"))
+    assert(types(3).equals("class java.lang.Integer"))
+    assert(types(4).equals("class java.lang.Integer"))
+    assert(types(5).equals("class java.lang.Long"))
+    assert(types(6).equals("class java.math.BigDecimal"))
+    assert(types(7).equals("class java.lang.Double"))
+    assert(types(8).equals("class java.lang.Double"))
+    assert(rows(0).getBoolean(0) == false)
+    assert(rows(0).getLong(1) == 0x225)
+    assert(rows(0).getInt(2) == 17)
+    assert(rows(0).getInt(3) == 77777)
+    assert(rows(0).getInt(4) == 123456789)
+    assert(rows(0).getLong(5) == 123456789012345L)
+    val bd = new BigDecimal("123456789012345.12345678901234500000")
+    assert(rows(0).getAs[BigDecimal](6).equals(bd))
+    assert(rows(0).getDouble(7) == 42.75)
+    assert(rows(0).getDouble(8) == 1.0000000000000002)
+  }
+
+  test("Date types") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "dates", new Properties)
+    val rows = df.collect()
+    assert(rows.length == 1)
+    val types = rows(0).toSeq.map(x => x.getClass.toString)
+    assert(types.length == 5)
+    assert(types(0).equals("class java.sql.Date"))
+    assert(types(1).equals("class java.sql.Timestamp"))
+    assert(types(2).equals("class java.sql.Timestamp"))
+    assert(types(3).equals("class java.sql.Timestamp"))
+    assert(types(4).equals("class java.sql.Date"))
+    assert(rows(0).getAs[Date](0).equals(Date.valueOf("1991-11-09")))
+    assert(rows(0).getAs[Timestamp](1).equals(Timestamp.valueOf("1970-01-01 13:31:24")))
+    assert(rows(0).getAs[Timestamp](2).equals(Timestamp.valueOf("1996-01-01 01:23:45")))
+    assert(rows(0).getAs[Timestamp](3).equals(Timestamp.valueOf("2009-02-13 23:31:30")))
+    assert(rows(0).getAs[Date](4).equals(Date.valueOf("2001-01-01")))
+  }
+
+  test("String types") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "strings", new Properties)
+    val rows = df.collect()
+    assert(rows.length == 1)
+    val types = rows(0).toSeq.map(x => x.getClass.toString)
+    assert(types.length == 9)
+    assert(types(0).equals("class java.lang.String"))
+    assert(types(1).equals("class java.lang.String"))
+    assert(types(2).equals("class java.lang.String"))
+    assert(types(3).equals("class java.lang.String"))
+    assert(types(4).equals("class java.lang.String"))
+    assert(types(5).equals("class java.lang.String"))
+    assert(types(6).equals("class [B"))
+    assert(types(7).equals("class [B"))
+    assert(types(8).equals("class [B"))
+    assert(rows(0).getString(0).equals("the"))
+    assert(rows(0).getString(1).equals("quick"))
+    assert(rows(0).getString(2).equals("brown"))
+    assert(rows(0).getString(3).equals("fox"))
+    assert(rows(0).getString(4).equals("jumps"))
+    assert(rows(0).getString(5).equals("over"))
+    assert(java.util.Arrays.equals(rows(0).getAs[Array[Byte]](6), Array[Byte](116, 104, 101, 0)))
+    assert(java.util.Arrays.equals(rows(0).getAs[Array[Byte]](7), Array[Byte](108, 97, 122, 121)))
+    assert(java.util.Arrays.equals(rows(0).getAs[Array[Byte]](8), Array[Byte](100, 111, 103)))
+  }
+
+  test("Basic write test") {
+    val df1 = sqlContext.read.jdbc(jdbcUrl, "numbers", new Properties)
+    val df2 = sqlContext.read.jdbc(jdbcUrl, "dates", new Properties)
+    val df3 = sqlContext.read.jdbc(jdbcUrl, "strings", new Properties)
+    df1.write.jdbc(jdbcUrl, "numberscopy", new Properties)
+    df2.write.jdbc(jdbcUrl, "datescopy", new Properties)
+    df3.write.jdbc(jdbcUrl, "stringscopy", new Properties)
+  }
+}

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/DockerJDBCIntegrationSuite.scala

@@ -44,6 +44,11 @@ abstract class DatabaseOnDocker {
    */
   val env: Map[String, String]
 
+  /**
+   * Wheather or not to use ipc mode for shared memory when starting docker image
+   */
+  val usesIpc: Boolean
+
   /**
    * The container-internal JDBC port that the database listens on.
    */
@@ -53,6 +58,11 @@ abstract class DatabaseOnDocker {
    * Return a JDBC URL that connects to the database running at the given IP address and port.
    */
   def getJdbcUrl(ip: String, port: Int): String
+
+  /**
+   * Optional process to run when container starts
+   */
+  def getStartupProcessName: Option[String]
 }
 
 abstract class DockerJDBCIntegrationSuite
@@ -97,17 +107,23 @@ abstract class DockerJDBCIntegrationSuite
       val dockerIp = DockerUtils.getDockerIp()
       val hostConfig: HostConfig = HostConfig.builder()
         .networkMode("bridge")
+        .ipcMode(if (db.usesIpc) "host" else "")
         .portBindings(
           Map(s"${db.jdbcPort}/tcp" -> List(PortBinding.of(dockerIp, externalPort)).asJava).asJava)
         .build()
       // Create the database container:
-      val config = ContainerConfig.builder()
+      val containerConfigBuilder = ContainerConfig.builder()
         .image(db.imageName)
         .networkDisabled(false)
         .env(db.env.map { case (k, v) => s"$k=$v" }.toSeq.asJava)
         .hostConfig(hostConfig)
         .exposedPorts(s"${db.jdbcPort}/tcp")
-        .build()
+      if(db.getStartupProcessName.isDefined) {
+        containerConfigBuilder
+        .cmd(db.getStartupProcessName.get)
+      }
+      val config = containerConfigBuilder.build()
+      // Create the database container:
       containerId = docker.createContainer(config).id
       // Start the container and wait until the database can accept JDBC connections:
       docker.startContainer(containerId)

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/MySQLIntegrationSuite.scala

@@ -30,9 +30,11 @@ class MySQLIntegrationSuite extends DockerJDBCIntegrationSuite {
     override val env = Map(
       "MYSQL_ROOT_PASSWORD" -> "rootpass"
     )
+    override val usesIpc = false
     override val jdbcPort: Int = 3306
     override def getJdbcUrl(ip: String, port: Int): String =
       s"jdbc:mysql://$ip:$port/mysql?user=root&password=rootpass"
+    override def getStartupProcessName: Option[String] = None
   }
 
   override def dataPreparation(conn: Connection): Unit = {

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/OracleIntegrationSuite.scala

@@ -52,9 +52,11 @@ class OracleIntegrationSuite extends DockerJDBCIntegrationSuite with SharedSQLCo
     override val env = Map(
       "ORACLE_ROOT_PASSWORD" -> "oracle"
     )
+    override val usesIpc = false
     override val jdbcPort: Int = 1521
     override def getJdbcUrl(ip: String, port: Int): String =
       s"jdbc:oracle:thin:system/oracle@//$ip:$port/xe"
+    override def getStartupProcessName: Option[String] = None
   }
 
   override def dataPreparation(conn: Connection): Unit = {

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala

@@ -32,9 +32,11 @@ class PostgresIntegrationSuite extends DockerJDBCIntegrationSuite {
     override val env = Map(
       "POSTGRES_PASSWORD" -> "rootpass"
     )
+    override val usesIpc = false
     override val jdbcPort = 5432
     override def getJdbcUrl(ip: String, port: Int): String =
       s"jdbc:postgresql://$ip:$port/postgres?user=postgres&password=rootpass"
+    override def getStartupProcessName: Option[String] = None
   }
 
   override def dataPreparation(conn: Connection): Unit = {

pom.xml

@@ -666,7 +666,7 @@
         <groupId>com.spotify</groupId>
         <artifactId>docker-client</artifactId>
         <classifier>shaded</classifier>
-        <version>3.4.0</version>
+        <version>3.6.6</version>
         <scope>test</scope>
         <exclusions>
           <exclusion>

project/SparkBuild.scala

@@ -366,8 +366,10 @@ object Flume {
 object DockerIntegrationTests {
   // This serves to override the override specified in DependencyOverrides:
   lazy val settings = Seq(
-    dependencyOverrides += "com.google.guava" % "guava" % "18.0"
+    dependencyOverrides += "com.google.guava" % "guava" % "18.0",
+    resolvers ++= Seq("DB2" at "https://app.camunda.com/nexus/content/repositories/public/")
   )
+
 }
 
 /**