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merging java end-to-end example (#1308) · nirupa-kumar/java-docs-samples@a4866b4 · GitHub

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merging java end-to-end example (GoogleCloudPlatform#1308)
Adds end-to-end example in Java for device and server
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‎iot/api-client/end-to-end-example/README.md‎

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# Google Cloud IoT Core Java Samples
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<a href="https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/java-docs-samples&page=editor&open_in_editor=iot/api-client/manager/README.md">
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<img alt="Open in Cloud Shell" src ="http://gstatic.com/cloudssh/images/open-btn.png"></a>
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This directory contains samples for Google Cloud IoT Core. [Google Cloud IoT Core](https://cloud.google.com/iot/docs/ "Google Cloud IoT Core") allows developers to easily integrate Publish and Subscribe functionality with devices and programmatically manage device authorization.
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## Prerequisites
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### Java
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We recommend using [Java 8 JDK](https://java.com/en/download) for this example.
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### Download Maven
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These samples use the [Apache Maven][maven] build system. Before getting
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started, be sure to [download][maven-download] and [install][maven-install] it.
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When you use Maven as described here, it will automatically download the needed
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client libraries.
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[maven]: https://maven.apache.org
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[maven-download]: https://maven.apache.org/download.cgi
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[maven-install]: https://maven.apache.org/install.html
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### Create a Project in the Google Cloud Platform Console
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If you haven't already created a project, create one now. Projects enable you to
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manage all Google Cloud Platform resources for your app, including deployment,
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access control, billing, and services.
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1. Open the [Cloud Platform Console][cloud-console].
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2. In the drop-down menu at the top, select **Create a project**.
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3. Give your project a name.
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4. Make a note of the project ID, which might be different from the project
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name. The project ID is used in commands and in configurations.
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[cloud-console]: https://console.cloud.google.com/
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## Setup
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Note that before you can run the sample, you must configure a Google Cloud
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PubSub topic for Cloud IoT as described in [the parent README](../README.md).
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Before running the samples, you can set the `GOOGLE_CLOUD_PROJECT` and
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`GOOGLE_APPLICATION_CREDENTIALS` environment variables to avoid passing them to
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the sample every time you run it.
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For example, on most *nix systems you can do this as:
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export GOOGLE_CLOUD_PROJECT=your-project-id
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export GOOGLE_APPLICATION_CREDENTIALS="/home/user/Downloads/[FILE_NAME].json"
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### Authentication
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This sample requires you to have authentication setup. Refer to the [Authentication Getting Started Guide](https://cloud.google.com/docs/authentication/getting-started "Google Cloud IoT Core") for instructions on setting up credentials for applications.
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Run the following command to install the libraries and build the sample with Maven:
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mvn clean compile assembly:single
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Before you begin, you will need to create the Google Cloud PubSub message queue, create a subscription to it, create a device registry, and add a device to the registry.
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1. Create the PubSub topic as:
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gcloud pubsub topics create java-e2e
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2. Create the subscription:
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gcloud pubsub subscriptions create java-e2e-sub --topic=java-e2e
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3. Create the device registry:
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gcloud iot registries create java-ed2e-registry --event-notification-config=topic=java-e2e --region=us-central1
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4. Run the `generate_keys.sh` shell script:
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../generate_keys.sh
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5. Add a device to the registry using the keys you generated:
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gcloud iot devices create device-id --registry=java-ed2e-sub --region=us-central1 --public-key=path=./rsa_cert.pem,type=RS256
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## Samples
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### Server
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<a href="https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/java-docs-samples&page=editor&open_in_editor=iot/api-client/manager/README.md">
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<img alt="Open in Cloud Shell" src ="http://gstatic.com/cloudssh/images/open-btn.png"></a>
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To run this sample:
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mvn exec:java \
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-Dexec.mainClass="com.example.cloud.iot.endtoend.CloudiotPubsubExampleServer" \
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-Dexec.args="-project_id=<your-iot-project> \
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-pubsub_subscription=<your-pubsub-subscription>"
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### Device
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<a href="https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/java-docs-samples&page=editor&open_in_editor=iot/api-client/manager/README.md">
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<img alt="Open in Cloud Shell" src ="http://gstatic.com/cloudssh/images/open-btn.png"></a>
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To run this sample:
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mvn exec:java \
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-Dexec.mainClass="com.example.cloud.iot.endtoend.CloudiotPubsubExampleMqttDevice" \
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-Dexec.args="-project_id=<your-iot-project> \
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-registry_id=<your-registry-id> \
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-device_id=<device-id> \
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-private_key_file=<path-to-keyfile> \
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-algorithm=<RS256|ES256>"
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For example, if your project ID is `blue-jet-123`, your device registry id is
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`my-registry`, your device id is `my-device` and you have generated your
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credentials using the [`generate_keys.sh`](../generate_keys.sh) script
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provided in the parent folder, you can run the sample as:
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mvn exec:java \
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-Dexec.mainClass="com.example.cloud.iot.endtoend.CloudiotPubsubExampleMqttDevice" \
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-Dexec.args="-project_id=blue-jet-123 \
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-registry_id=my-registry \
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-device_id=my-device \
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-private_key_file=../rsa_private_pkcs8 \
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-algorithm=RS256"

‎iot/api-client/end-to-end-example/pom.xml‎

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<!--
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Copyright 2019 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.example.cloud</groupId>
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<artifactId>cloudiot-manager-demo</artifactId>
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<packaging>jar</packaging>
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<version>1.0</version>
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<name>cloudiot-manager-demo</name>
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<url>http://maven.apache.org</url>
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<!--
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The parent pom defines common style checks and testing strategies for our samples.
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Removing or replacing it should not affect the execution of the samples in anyway.
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-->
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<parent>
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<groupId>com.google.cloud.samples</groupId>
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<artifactId>shared-configuration</artifactId>
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<version>1.0.9</version>
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</parent>
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<properties>
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<maven.compiler.target>1.8</maven.compiler.target>
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<maven.compiler.source>1.8</maven.compiler.source>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.eclipse.paho</groupId>
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<artifactId>org.eclipse.paho.client.mqttv3</artifactId>
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<version>1.2.0</version>
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</dependency>
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<dependency>
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<groupId>org.json</groupId>
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<artifactId>json</artifactId>
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<version>20090211</version>
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</dependency>
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<dependency>
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<groupId>io.jsonwebtoken</groupId>
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<artifactId>jjwt</artifactId>
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<version>0.7.0</version>
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</dependency>
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<dependency>
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<groupId>joda-time</groupId>
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<artifactId>joda-time</artifactId>
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<version>2.1</version>
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</dependency>
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<dependency>
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<groupId>com.google.apis</groupId>
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<artifactId>google-api-services-cloudiot</artifactId>
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<version>v1-rev20181120-1.27.0</version>
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</dependency>
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<dependency>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-pubsub</artifactId>
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<version>1.53.0</version>
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</dependency>
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<dependency>
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<groupId>com.google.oauth-client</groupId>
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<artifactId>google-oauth-client</artifactId>
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<version>1.23.0</version>
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</dependency>
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<dependency>
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<groupId>com.google.guava</groupId>
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<artifactId>guava</artifactId>
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<version>23.0</version>
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</dependency>
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<dependency>
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<groupId>com.google.api-client</groupId>
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<artifactId>google-api-client</artifactId>
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<version>1.23.0</version>
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</dependency>
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<dependency>
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<groupId>commons-cli</groupId>
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<artifactId>commons-cli</artifactId>
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<version>1.3</version>
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</dependency>
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<!-- Test dependencies -->
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.google.truth</groupId>
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<artifactId>truth</artifactId>
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<version>0.34</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<artifactId>maven-assembly-plugin</artifactId>
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<configuration>
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<archive>
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<manifest>
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<mainClass>com.example.cloudiot.Manage</mainClass>
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</manifest>
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</archive>
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<descriptorRefs>
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<descriptorRef>jar-with-dependencies</descriptorRef>
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</descriptorRefs>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

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