pom.xml

<!--
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.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	
	<groupId>com.alibaba.flink</groupId>
	<artifactId>flink-examples</artifactId>
	<version>0.1</version>
	<packaging>jar</packaging>

	<name>Flink Example Job</name>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<flink.version>1.1-SNAPSHOT</flink.version>
        <scala.version>2.10.4</scala.version>
        <scala.macros.version>2.0.1</scala.macros.version>

    </properties>

	<repositories>
		<repository>
			<id>apache.snapshots</id>
			<name>Apache Development Snapshot Repository</name>
			<url>https://repository.apache.org/content/repositories/snapshots/</url>
			<releases>
				<enabled>false</enabled>
			</releases>
			<snapshots>
				<enabled>true</enabled>
			</snapshots>
		</repository>
	</repositories>
	
	<!-- 
		
		Execute "mvn clean package -Pbuild-jar"
		to build a jar file out of this project!

		How to use the Flink Quickstart pom:

		a) Adding new dependencies:
			You can add dependencies to the list below.
			Please check if the maven-shade-plugin below is filtering out your dependency
			and remove the exclude from there.

		b) Build a jar for running on the cluster:
			There are two options for creating a jar from this project

			b.1) "mvn clean package" -> this will create a fat jar which contains all
					dependencies necessary for running the jar created by this pom in a cluster.
					The "maven-shade-plugin" excludes everything that is provided on a running Flink cluster.

			b.2) "mvn clean package -Pbuild-jar" -> This will also create a fat-jar, but with much
					nicer dependency exclusion handling. This approach is preferred and leads to
					much cleaner jar files.
	-->

	<dependencies>
		<dependency>
			<groupId>org.apache.flink</groupId>
			<artifactId>flink-java</artifactId>
			<version>${flink.version}</version>
		</dependency>
		<dependency>
			<groupId>org.apache.flink</groupId>
			<artifactId>flink-streaming-java_2.10</artifactId>
			<version>${flink.version}</version>
		</dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-streaming-scala_2.10</artifactId>
            <version>${flink.version}</version>
        </dependency>
		<dependency>
			<groupId>org.apache.flink</groupId>
			<artifactId>flink-clients_2.10</artifactId>
			<version>${flink.version}</version>
		</dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table_2.10</artifactId>
            <version>${flink.version}</version>
        </dependency>
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>${scala.version}</version>
        </dependency>

        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-reflect</artifactId>
            <version>${scala.version}</version>
        </dependency>

        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-compiler</artifactId>
            <version>${scala.version}</version>
        </dependency>
	</dependencies>

	<profiles>
		<profile>
			<!-- Profile for packaging correct JAR files -->
			<id>build-jar</id>
			<activation>
				<activeByDefault>false</activeByDefault>
			</activation>
			<dependencies>
				<dependency>
					<groupId>org.apache.flink</groupId>
					<artifactId>flink-java</artifactId>
					<version>${flink.version}</version>
					<scope>provided</scope>
				</dependency>
				<dependency>
					<groupId>org.apache.flink</groupId>
					<artifactId>flink-streaming-java_2.10</artifactId>
					<version>${flink.version}</version>
					<scope>provided</scope>
				</dependency>
				<dependency>
					<groupId>org.apache.flink</groupId>
					<artifactId>flink-clients_2.10</artifactId>
					<version>${flink.version}</version>
					<scope>provided</scope>
				</dependency>
			</dependencies>

			<build>
				<plugins>
					<!-- disable the exclusion rules -->
					<plugin>
						<groupId>org.apache.maven.plugins</groupId>
						<artifactId>maven-shade-plugin</artifactId>
						<version>2.4.1</version>
						<executions>
							<execution>
								<phase>package</phase>
								<goals>
									<goal>shade</goal>
								</goals>
								<configuration>
									<artifactSet>
										<excludes combine.self="override"></excludes>
									</artifactSet>
								</configuration>
							</execution>
						</executions>
					</plugin>
				</plugins>
			</build>
		</profile>
	</profiles>

	<build>
		<plugins>
			<!-- We use the maven-shade plugin to create a fat jar that contains all dependencies
			except flink and it's transitive dependencies. The resulting fat-jar can be executed
			on a cluster. Change the value of Program-Class if your program entry point changes. -->
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-shade-plugin</artifactId>
				<version>2.4.1</version>
				<executions>
					<!-- Run shade goal on package phase -->
					<execution>
						<phase>package</phase>
						<goals>
							<goal>shade</goal>
						</goals>
						<configuration>
							<artifactSet>
								<excludes>
									<!-- This list contains all dependencies of flink-dist
									Everything else will be packaged into the fat-jar
									-->
									<exclude>org.apache.flink:flink-annotations</exclude>
									<exclude>org.apache.flink:flink-shaded-hadoop1</exclude>
									<exclude>org.apache.flink:flink-shaded-hadoop2</exclude>
									<exclude>org.apache.flink:flink-shaded-curator-recipes</exclude>
									<exclude>org.apache.flink:flink-core</exclude>
									<exclude>org.apache.flink:flink-java</exclude>
									<exclude>org.apache.flink:flink-scala_2.10</exclude>
									<exclude>org.apache.flink:flink-runtime_2.10</exclude>
									<exclude>org.apache.flink:flink-optimizer_2.10</exclude>
									<exclude>org.apache.flink:flink-clients_2.10</exclude>
									<exclude>org.apache.flink:flink-avro_2.10</exclude>
									<exclude>org.apache.flink:flink-examples-batch_2.10</exclude>
									<exclude>org.apache.flink:flink-examples-streaming_2.10</exclude>
									<exclude>org.apache.flink:flink-streaming-java_2.10</exclude>

									<!-- Also exclude very big transitive dependencies of Flink

									WARNING: You have to remove these excludes if your code relies on other
									versions of these dependencies.

									-->
									<!--<exclude>org.scala-lang:scala-library</exclude>-->
									<!--<exclude>org.scala-lang:scala-compiler</exclude>-->
									<!--<exclude>org.scala-lang:scala-reflect</exclude>-->
									<exclude>com.amazonaws:aws-java-sdk</exclude>
									<exclude>com.typesafe.akka:akka-actor_*</exclude>
									<exclude>com.typesafe.akka:akka-remote_*</exclude>
									<exclude>com.typesafe.akka:akka-slf4j_*</exclude>
									<exclude>io.netty:netty-all</exclude>
									<exclude>io.netty:netty</exclude>
									<exclude>commons-fileupload:commons-fileupload</exclude>
									<exclude>org.apache.avro:avro</exclude>
									<exclude>commons-collections:commons-collections</exclude>
									<exclude>org.codehaus.jackson:jackson-core-asl</exclude>
									<exclude>org.codehaus.jackson:jackson-mapper-asl</exclude>
									<exclude>com.thoughtworks.paranamer:paranamer</exclude>
									<exclude>org.xerial.snappy:snappy-java</exclude>
									<exclude>org.apache.commons:commons-compress</exclude>
									<exclude>org.tukaani:xz</exclude>
									<exclude>com.esotericsoftware.kryo:kryo</exclude>
									<exclude>com.esotericsoftware.minlog:minlog</exclude>
									<exclude>org.objenesis:objenesis</exclude>
									<exclude>com.twitter:chill_*</exclude>
									<exclude>com.twitter:chill-java</exclude>
									<exclude>com.twitter:chill-avro_*</exclude>
									<exclude>com.twitter:chill-bijection_*</exclude>
									<exclude>com.twitter:bijection-core_*</exclude>
									<exclude>com.twitter:bijection-avro_*</exclude>
									<exclude>commons-lang:commons-lang</exclude>
									<exclude>junit:junit</exclude>
									<exclude>de.javakaffee:kryo-serializers</exclude>
									<exclude>joda-time:joda-time</exclude>
									<exclude>org.apache.commons:commons-lang3</exclude>
									<exclude>org.slf4j:slf4j-api</exclude>
									<exclude>org.slf4j:slf4j-log4j12</exclude>
									<exclude>log4j:log4j</exclude>
									<exclude>org.apache.commons:commons-math</exclude>
									<exclude>org.apache.sling:org.apache.sling.commons.json</exclude>
									<exclude>commons-logging:commons-logging</exclude>
									<exclude>commons-codec:commons-codec</exclude>
									<exclude>com.fasterxml.jackson.core:jackson-core</exclude>
									<exclude>com.fasterxml.jackson.core:jackson-databind</exclude>
									<exclude>com.fasterxml.jackson.core:jackson-annotations</exclude>
									<exclude>stax:stax-api</exclude>
									<exclude>com.typesafe:config</exclude>
									<exclude>org.uncommons.maths:uncommons-maths</exclude>
									<exclude>com.github.scopt:scopt_*</exclude>
									<exclude>commons-io:commons-io</exclude>
									<exclude>commons-cli:commons-cli</exclude>
								</excludes>
							</artifactSet>
							<filters>
								<filter>
									<artifact>org.apache.flink:*</artifact>
									<excludes>
										<!-- exclude shaded google but include shaded curator -->
										<exclude>org/apache/flink/shaded/com/**</exclude>
										<exclude>web-docs/**</exclude>
									</excludes>
								</filter>
								<filter>
									<!-- Do not copy the signatures in the META-INF folder.
									Otherwise, this might cause SecurityExceptions when using the JAR. -->
									<artifact>*:*</artifact>
									<excludes>
										<exclude>META-INF/*.SF</exclude>
										<exclude>META-INF/*.DSA</exclude>
										<exclude>META-INF/*.RSA</exclude>
									</excludes>
								</filter>
							</filters>
							<transformers>
								<!-- add Main-Class to manifest file -->
								<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
									<mainClass>com.alibaba.flink.examples.Job</mainClass>
								</transformer>
							</transformers>
							<createDependencyReducedPom>false</createDependencyReducedPom>
						</configuration>
					</execution>
				</executions>
			</plugin>

			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.1</version>
				<configuration>
					<source>1.7</source> <!-- If you want to use Java 8, change this to "1.8" -->
					<target>1.7</target> <!-- If you want to use Java 8, change this to "1.8" -->
				</configuration>
			</plugin>
            <plugin>
                <groupId>org.scala-tools</groupId>
                <artifactId>maven-scala-plugin</artifactId>
                <version>2.15.2</version>
                <executions>
                    <execution>
                        <id>scala-compile</id>
                        <goals>
                            <goal>compile</goal>
                            <goal>testCompile</goal>
                        </goals>
                        <!--<configuration>-->
                            <!--<scalaVersion>${scala.version}</scalaVersion>-->
                        <!--</configuration>-->
                        <configuration>
                            <args>
                                <arg>-make:transitive</arg>
                                <arg>-dependencyfile</arg>
                                <arg>${project.build.directory}/.scala_dependencies</arg>
                            </args>
                            <compilerPlugins combine.children="append">
                                <compilerPlugin>
                                    <groupId>org.scalamacros</groupId>
                                    <artifactId>paradise_${scala.version}</artifactId>
                                    <version>${scala.macros.version}</version>
                                </compilerPlugin>
                            </compilerPlugins>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
		</plugins>
		
			
		<!-- If you want to use Java 8 Lambda Expressions uncomment the following lines -->
		<!--
		<pluginManagement>
			<plugins>
				<plugin>
					<artifactId>maven-compiler-plugin</artifactId>
					<configuration>
						<source>1.8</source>
						<target>1.8</target>
						<compilerId>jdt</compilerId>
					</configuration>
					<dependencies>
						<dependency>
							<groupId>org.eclipse.tycho</groupId>
							<artifactId>tycho-compiler-jdt</artifactId>
							<version>0.21.0</version>
						</dependency>
					</dependencies>
				</plugin>
		
				<plugin>
					<groupId>org.eclipse.m2e</groupId>
					<artifactId>lifecycle-mapping</artifactId>
					<version>1.0.0</version>
					<configuration>
						<lifecycleMappingMetadata>
							<pluginExecutions>
								<pluginExecution>
									<pluginExecutionFilter>
										<groupId>org.apache.maven.plugins</groupId>
										<artifactId>maven-assembly-plugin</artifactId>
										<versionRange>[2.4,)</versionRange>
										<goals>
											<goal>single</goal>
										</goals>
									</pluginExecutionFilter>
									<action>
										<ignore/>
									</action>
								</pluginExecution>
								<pluginExecution>
									<pluginExecutionFilter>
										<groupId>org.apache.maven.plugins</groupId>
										<artifactId>maven-compiler-plugin</artifactId>
										<versionRange>[3.1,)</versionRange>
										<goals>
											<goal>testCompile</goal>
											<goal>compile</goal>
										</goals>
									</pluginExecutionFilter>
									<action>
										<ignore/>
									</action>
								</pluginExecution>
							</pluginExecutions>
						</lifecycleMappingMetadata>
					</configuration>
				</plugin>
			</plugins>
		</pluginManagement>
		-->
		
	</build>
</project>

WordCountTable.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 com.alibaba.flink.examples

import org.apache.flink.api.scala._
import org.apache.flink.api.scala.table._
import org.apache.flink.api.table.TableEnvironment

/**
 * Simple example for demonstrating the use of the Table API for a Word Count.
 */
object WordCountTable {

  case class WC(word: String, count: Int)

  def main(args: Array[String]): Unit = {

    // set up execution environment
    val env = ExecutionEnvironment.getExecutionEnvironment
    val tEnv = TableEnvironment.getTableEnvironment(env)

    val input = env.fromElements(WC("hello", 1), WC("hello", 1), WC("ciao", 1))
    val expr = input.toTable(tEnv)
    val result = expr
      .groupBy('word)
      .select('word, 'count.sum as 'count)
      .toDataSet[WC]

    result.print()
  }
}