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docs(sample): Add sample for Native Image support in Pub/Sub #1026

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2 changes: 2 additions & 0 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -240,6 +240,8 @@ Samples are in the [`samples/`](https://github.com/googleapis/java-pubsub/tree/m

| Sample | Source Code | Try it |
| --------------------------- | --------------------------------- | ------ |
| Native Image Pub Sub Sample | [source code](https://github.com/googleapis/java-pubsub/blob/main/samples/native-image-sample/src/main/java/pubsub/NativeImagePubSubSample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/native-image-sample/src/main/java/pubsub/NativeImagePubSubSample.java) |
| Publish Operations | [source code](https://github.com/googleapis/java-pubsub/blob/main/samples/native-image-sample/src/main/java/pubsub/PublishOperations.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/native-image-sample/src/main/java/pubsub/PublishOperations.java) |
| Create Avro Schema Example | [source code](https://github.com/googleapis/java-pubsub/blob/main/samples/snippets/src/main/java/pubsub/CreateAvroSchemaExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/CreateAvroSchemaExample.java) |
| Create Proto Schema Example | [source code](https://github.com/googleapis/java-pubsub/blob/main/samples/snippets/src/main/java/pubsub/CreateProtoSchemaExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/CreateProtoSchemaExample.java) |
| Create Pull Subscription Example | [source code](https://github.com/googleapis/java-pubsub/blob/main/samples/snippets/src/main/java/pubsub/CreatePullSubscriptionExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/CreatePullSubscriptionExample.java) |
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77 changes: 77 additions & 0 deletions samples/native-image-sample/README.md
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# Pub/Sub Sample Application with Native Image

The Pub/Sub sample application demonstrates some common operations with Pub/Sub and is compatible with Native Image compilation.

## Setup Instructions

You will need to follow these prerequisite steps in order to run the samples:

1. If you have not already, [create a Google Cloud Platform Project](https://cloud.google.com/resource-manager/docs/creating-managing-projects#creating_a_project).

2. Install the [Google Cloud SDK](https://cloud.google.com/sdk/) which will allow you to run the sample with your project's credentials.

Once installed, log in with Application Default Credentials using the following command:

```
gcloud auth application-default login
```

**Note:** Authenticating with Application Default Credentials is convenient to use during development, but we recommend [alternate methods of authentication](https://cloud.google.com/docs/authentication/production) during production use.

3. Install the GraalVM compiler.

You can follow the [official installation instructions](https://www.graalvm.org/docs/getting-started/#install-graalvm) from the GraalVM website.
After following the instructions, ensure that you install the native image extension installed by running:

```
gu install native-image
```

Once you finish following the instructions, verify that the default version of Java is set to the GraalVM version by running `java -version` in a terminal.

You will see something similar to the below output:

```
$ java -version

openjdk version "11.0.7" 2020-04-14
OpenJDK Runtime Environment GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02)
OpenJDK 64-Bit Server VM GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02, mixed mode, sharing)
```

4. [Enable the Pub/Sub APIs](https://console.cloud.google.com/apis/api/pubsub.googleapis.com).

### Sample

Navigate to this directory in a new terminal.

1. Compile the application using the Native Image Compiler. This step may take a few minutes.

```
mvn package -P native -DskipTests
```

2. Run the application:

```
./target/native-image-sample
```

3. The application will create a new Pub/Sub topic, send and receive a message from it, and then delete the topic.

```
Created topic: projects/YOUR_PROJECT_ID/topics/graal-pubsub-test-00e72640-4e36-4aff-84d2-13b7569b2289 under project: YOUR_PROJECT_ID
Created pull subscription: projects/YOUR_PROJECT_ID/subscriptions/graal-pubsub-test-sub2fb5e3f3-cb26-439b-b88c-9cb0cfca9e45
Published message with ID: 457327433078420
Received Payload: Pub/Sub Native Image Test published message at timestamp: 2020-09-23T19:45:42.746514Z
Deleted topic projects/YOUR_PROJECT_ID/topics/graal-pubsub-test-00e72640-4e36-4aff-84d2-13b7569b2289
Deleted subscription projects/YOUR_PROJECT_ID/subscriptions/graal-pubsub-test-sub2fb5e3f3-cb26-439b-b88c-9cb0cfca9e45
```

## Sample Integration Test with native Image Support

In order to run the sample integration test as a native image, call the following command:

```
mvn test -Pnative
```
155 changes: 155 additions & 0 deletions samples/native-image-sample/pom.xml
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<?xml version='1.0' encoding='UTF-8'?>
<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.google.cloud</groupId>
<artifactId>native-image-sample</artifactId>
<name>Native Image Sample</name>
<url>https://github.com/googleapis/java-pubsub</url>

<!--
The parent pom defines common style checks and testing strategies for our samples.
Removing or replacing it should not affect the execution of the samples in anyway.
-->
<parent>
<groupId>com.google.cloud.samples</groupId>
<artifactId>shared-configuration</artifactId>
<version>1.2.0</version>
</parent>

<properties>
<maven.compiler.target>11</maven.compiler.target>
<maven.compiler.source>11</maven.compiler.source>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.google.cloud</groupId>
<artifactId>libraries-bom</artifactId>
<version>24.3.0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

<dependencies>
<dependency>
<groupId>com.google.cloud</groupId>
<artifactId>google-cloud-core</artifactId>
</dependency>
<dependency>
<groupId>com.google.cloud</groupId>
<artifactId>google-cloud-pubsub</artifactId>
</dependency>

<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.truth</groupId>
<artifactId>truth</artifactId>
<version>1.1.3</version>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>pubsub.NativeImagePubSubSample
</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>

<!-- Native Profile-->
<profiles>
<profile>
<id>native</id>

<dependencies>
<dependency>
<groupId>com.google.cloud</groupId>
<artifactId>native-image-support</artifactId>
<version>0.12.4</version>
</dependency>
<dependency>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
<version>5.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.graalvm.buildtools</groupId>
<artifactId>junit-platform-native</artifactId>
<version>0.9.9</version>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin
</artifactId> <!-- Must use older version of surefire plugin for native-image testing. -->
<version>2.22.2</version>
<configuration>
<includes>
<include>**/*IT</include>
</includes>
</configuration>
</plugin>
<plugin>
<groupId>org.graalvm.buildtools</groupId>
<artifactId>native-maven-plugin</artifactId>
<version>0.9.9</version>
<extensions>true</extensions>
<configuration>
<mainClass>pubsub.NativeImagePubSubSample
</mainClass>
<buildArgs>
<buildArg>--no-fallback</buildArg>
<buildArg>--no-server</buildArg>
<buildArg>--features=com.google.cloud.nativeimage.features.ProtobufMessageFeature</buildArg>
</buildArgs>
</configuration>
<executions>
<execution>
<id>build-native</id>
<goals>
<goal>build</goal>
<goal>test</goal>
</goals>
<phase>package</phase>
</execution>
<execution>
<id>test-native</id>
<goals>
<goal>test</goal>
</goals>
<phase>test</phase>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>
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