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[FLINK-24603][e2e] Add test for Scala-free Flink
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@zentol
zentol committed Nov 5, 2021
1 parent 295a1e3 commit 403ec23
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229 changes: 229 additions & 0 deletions flink-end-to-end-tests/flink-end-to-end-tests-scala/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!--
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 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<parent>
<artifactId>flink-end-to-end-tests</artifactId>
<groupId>org.apache.flink</groupId>
<version>1.15-SNAPSHOT</version>
</parent>

<modelVersion>4.0.0</modelVersion>

<artifactId>flink-end-to-end-tests-scala</artifactId>
<name>Flink : E2E Tests : Scala</name>

<properties>
<!-- Use an old version that is not actively supported by Flink.
2.11 still 'just works' with our current maven setup,
and going forward we won't add support for it again.-->
<scala.version>2.11.12</scala.version>
</properties>

<dependencies>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java</artifactId>
<version>${project.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-clients</artifactId>
<version>${project.version}</version>
<scope>provided</scope>
</dependency>

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

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-test-utils-junit</artifactId>
<version>${project.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-end-to-end-tests-common</artifactId>
<version>${project.version}</version>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<executions>
<!-- we intentionally use an unsupported scala version -->
<execution>
<id>enforce-versions</id>
<goals>
<goal>enforce</goal>
</goals>
<phase>none</phase>
</execution>
</executions>
</plugin>

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<executions>
<execution>
<id>Scala</id>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<finalName>scala</finalName>
<artifactSet>
<includes>
<include>org.scala-lang*:*</include>
</includes>
</artifactSet>
</configuration>
</execution>
<execution>
<id>Jobs</id>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<finalName>jobs</finalName>
<artifactSet>
<includes>
<include>${project.groupId}:${project.artifactId}</include>
</includes>
</artifactSet>
</configuration>
</execution>
</executions>
</plugin>

<!-- Scala Compiler -->
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<executions>
<!-- Run scala compiler in the process-resources phase, so that dependencies on
scala classes can be resolved later in the (Java) compile phase -->
<execution>
<id>scala-compile-first</id>
<phase>process-resources</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>

<!-- Run scala compiler in the process-test-resources phase, so that dependencies on
scala classes can be resolved later in the (Java) test-compile phase -->
<execution>
<id>scala-test-compile</id>
<phase>process-test-resources</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<jvmArgs>
<jvmArg>-Xms128m</jvmArg>
<jvmArg>-Xmx512m</jvmArg>
</jvmArgs>
</configuration>
</plugin>

<!-- Adding scala source directories to build path -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<executions>
<!-- Add src/main/scala to eclipse build path -->
<execution>
<id>add-source</id>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>src/main/scala</source>
</sources>
</configuration>
</execution>
<!-- Add src/test/scala to eclipse build path -->
<execution>
<id>add-test-source</id>
<phase>generate-test-sources</phase>
<goals>
<goal>add-test-source</goal>
</goals>
<configuration>
<sources>
<source>src/test/java</source>
<source>src/test/scala</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>

<!-- Scala Code Style, most of the configuration done via plugin management -->
<plugin>
<groupId>org.scalastyle</groupId>
<artifactId>scalastyle-maven-plugin</artifactId>
<configuration>
<configLocation>${project.basedir}/../../tools/maven/scalastyle-config.xml</configLocation>
</configuration>
</plugin>

<!-- Add Scala test classes to test jar in order to test Scala type information. -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

</project>
34 changes: 34 additions & 0 deletions ...ests/flink-end-to-end-tests-scala/src/main/java/org/apache/flink/tests/scala/JavaJob.java
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/*
* 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.tests.scala;

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;

/** Simple batch job in pure Java. */
public class JavaJob {
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

// we want to go through serialization to check for kryo issues
env.disableOperatorChaining();

env.fromElements(new NonPojo()).map(x -> x);

env.execute();
}
}
36 changes: 36 additions & 0 deletions ...end-tests-scala/src/main/java/org/apache/flink/tests/scala/JavaJobWithKryoSerializer.java
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/*
* 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.tests.scala;

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;

/** Simple batch job in pure Java that uses a custom Kryo serializer. */
public class JavaJobWithKryoSerializer {
public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

// we want to go through serialization to check for kryo issues
env.disableOperatorChaining();

env.addDefaultKryoSerializer(NonPojo.class, NonPojoSerializer.class);

env.fromElements(new NonPojo()).map(x -> x);

env.execute();
}
}
28 changes: 28 additions & 0 deletions ...ests/flink-end-to-end-tests-scala/src/main/java/org/apache/flink/tests/scala/NonPojo.java
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/*
* 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.tests.scala;

/** Simple type that needs to go through Kryo for serialization. */
public class NonPojo {
private final int someInt = 34;
private final String someString = "hello";

public int getSomeInt() {
return someInt;
}
}
38 changes: 38 additions & 0 deletions ...-end-to-end-tests-scala/src/main/java/org/apache/flink/tests/scala/NonPojoSerializer.java
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/*
* 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.tests.scala;

import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.Serializer;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;

/** Kryo serializer for {@link NonPojo}. */
public class NonPojoSerializer extends Serializer<NonPojo> {

@Override
public void write(Kryo kryo, Output output, NonPojo object) {
output.writeInt(object.getSomeInt());
}

@Override
public NonPojo read(Kryo kryo, Input input, Class<NonPojo> type) {
input.readInt();
return new NonPojo();
}
}
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