IoT MQTT Tests

iot/api-client/manager/README.md

@@ -211,3 +211,56 @@ To publish state messages, run the sample as follows:
     gcloud beta pubsub subscriptions pull --auto-ack \
         projects/my-iot-project/subscriptions/my-subscription
 ```
+
+# Cloud IoT Core Java MQTT example
+
+This sample app publishes data to Cloud Pub/Sub using the MQTT bridge provided
+as part of Google Cloud IoT Core.
+
+Note that before you can run the sample, you must configure a Google Cloud
+PubSub topic for Cloud IoT Core and register a device as described in the
+[parent README](../README.md).
+
+## Setup
+
+Run the following command to install the dependencies using Maven:
+
+    mvn clean compile
+
+## Running the sample
+
+The following command summarizes the sample usage:
+
+    mvn exec:java \
+        -Dexec.mainClass="com.example.cloud.iot.examples.MqttExample" \
+        -Dexec.args="-project_id=my-iot-project \
+                     -registry_id=my-registry \
+                     -device_id=my-device \
+                     -private_key_file=rsa_private_pkcs8 \
+                     -algorithm=RS256"
+
+For example, if your project ID is `blue-jet-123`, your service account
+credentials are stored in your home folder in creds.json and you have generated
+your credentials using the [`generate_keys.sh`](../generate_keys.sh) script
+provided in the parent folder, you can run the sample as:
+
+    mvn exec:java \
+        -Dexec.mainClass="com.example.cloud.iot.examples.MqttExample" \
+        -Dexec.args="-project_id=blue-jet-123 \
+                     -registry_id=my-registry \
+                     -device_id=my-device \
+                     -private_key_file=../rsa_private_pkcs8 \
+                     -algorithm=RS256"
+
+## Reading the messages written by the sample client
+
+1. Create a subscription to your topic.
+
+    gcloud beta pubsub subscriptions create \
+        projects/your-project-id/subscriptions/my-subscription \
+        --topic device-events
+
+2. Read messages published to the topic
+
+    gcloud beta pubsub subscriptions pull --auto-ack \
+        projects/my-iot-project/subscriptions/my-subscription

iot/api-client/manager/pom.xml

@@ -36,7 +36,19 @@
     <maven.compiler.target>1.7</maven.compiler.target>
   </properties>
 
+  <repositories>
+    <repository>
+      <id>Eclipse Paho Repo</id>
+      <url>https://repo.eclipse.org/content/repositories/paho-releases/</url>
+    </repository>
+  </repositories>
+
   <dependencies>
+    <dependency>
+      <groupId>org.eclipse.paho</groupId>
+      <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
+      <version>1.0.2</version>
+    </dependency>
     <dependency>
       <groupId>org.json</groupId>
       <artifactId>json</artifactId>

iot/api-client/manager/resources/rsa_cert.pem

@@ -1,18 +1,18 @@
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 -----END CERTIFICATE-----

iot/api-client/manager/resources/rsa_private.pem

@@ -1,28 +1,28 @@
 -----BEGIN PRIVATE KEY-----
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 -----END PRIVATE KEY-----