Updated IoT Central Java SDK examples for 2021-06-01 release (#18)

* Updated java samples for latest working IoT Central SDK version 1.0.0-beta.2 with support for managed identity and containing other improvements. Switched from gradle to maven. Updated readme.md.

java/.gitignore

@@ -1,6 +1,6 @@
 .classpath
-.gradle/
 .project
 .settings/
 bin/
-build/
+build/
+target/

java/.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "java.configuration.updateBuildConfiguration": "automatic"
+}

java/README.MD

@@ -1,24 +1,32 @@
-# Azure IoT Central ARM Java SDK samples
+# Azure IoT Central Java SDK Samples for Management APIs
 
-Sample code for using [com.microsoft.azure.iotcentral.v2018_09_01:azure-mgmt-iotcentral](https://search.maven.org/artifact/com.microsoft.azure.iotcentral.v2018_09_01/azure-mgmt-iotcentral/1.0.0/jar) SDK provided by [Microsoft Azure](https://github.com/Azure). This sample code will check if the resource name is available, create or update an app, retrieve app information, update app, list all the apps that belongs to the specific resource group, and finally delete the app if uncommented.
+Sample code for using Azure IoT Central Management Plane APIs.
 
 ## Get started
 
 ### Prerequisites
 - [Java JDK or JRE](https://www.oracle.com/technetwork/java/javase/downloads/index.html)
-- [Gradle](https://gradle.org/install/)
-- A resource group called **myResourceGroup** in your Azure subscription
+- [Maven](http://maven.apache.org/install.html)
+- A service principal and a resource group to work with. Follow [these instructions](https://docs.microsoft.com/azure/active-directory/develop/howto-create-service-principal-portal).
 
-### Installation
-To begin, simply clone this repository onto your local machine and build it using Gradle.
+### SDK version
 
-```
-gradle build
-```
+The support SDK version is [1.0.0-beta.2](https://github.com/Azure/azure-sdk-for-java/tree/azure-resourcemanager-iotcentral_1.0.0-beta.2/sdk/iotcentral/azure-resourcemanager-iotcentral).
+
+See more samples on using IoT Central APIs [here](https://github.com/Azure/azure-sdk-for-java/blob/azure-resourcemanager-iotcentral_1.0.0-beta.2/sdk/iotcentral/azure-resourcemanager-iotcentral/SAMPLE.md).
 
 ### Usage
-Make sure you head over to the src\main\java\sample\IoTCentralExample.java to change the configuration to the one that is shown on your [Microsoft Azure Portal](https://portal.azure.com).
+To begin, clone this repository, update the authentication settings in IotCentralMgmtApiSampleBase.java, the app configurations in Main.java, and compile/execute the project.
 
 ```
-gradle run
+cd src
+mvn clean compile exec:java
 ```
+
+See SampleOutput.txt in the basedir for output from the project execution.
+
+Continue developing using the samples shown [here](https://github.com/Azure/azure-sdk-for-java/blob/azure-resourcemanager-iotcentral_1.0.0-beta.2/sdk/iotcentral/azure-resourcemanager-iotcentral/SAMPLE.md).
+
+### Additional References:
+Overview: Use the Azure SDK for Java | Microsoft Docs
+Getting started: Get started with the Azure SDK for Java | Microsoft Docs

java/SampleOutput.txt

@@ -0,0 +1,110 @@
+[INFO] Scanning for projects...
+[INFO] 
+[INFO] --< com.microsoft.azure.iotcentral:azure-iot-central-java-sdk-samples >--
+[INFO] Building azure-iot-central-java-sdk-samples 2.0-SNAPSHOT
+[INFO] --------------------------------[ jar ]---------------------------------
+[INFO] 
+[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ azure-iot-central-java-sdk-samples ---
+[INFO] Deleting C:\code\final\azure-iot-central-arm-sdk-samples\java\target
+[INFO] 
+[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ azure-iot-central-java-sdk-samples ---
+[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
+[INFO] skip non existing resourceDirectory C:\code\final\azure-iot-central-arm-sdk-samples\java\src\main\resources
+[INFO] 
+[INFO] --- maven-compiler-plugin:3.7.0:compile (default-compile) @ azure-iot-central-java-sdk-samples ---
+[INFO] Changes detected - recompiling the module!
+[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
+[INFO] Compiling 3 source files to C:\code\final\azure-iot-central-arm-sdk-samples\java\target\classes
+[INFO] 
+[INFO] --- exec-maven-plugin:1.6.0:java (default-cli) @ azure-iot-central-java-sdk-samples ---
+------------------
+Operations List:
+------------------
+
+Microsoft.IoTCentral/IoTApps/read
+Microsoft.IoTCentral/IoTApps/write
+Microsoft.IoTCentral/IoTApps/delete
+Microsoft.IoTCentral/checkNameAvailability/action
+Microsoft.IoTCentral/checkSubdomainAvailability/action
+Microsoft.IoTCentral/operations/read
+Microsoft.IoTCentral/appTemplates/action
+Microsoft.IoTCentral/register/action
+Microsoft.IoTCentral/IoTApps/providers/Microsoft.Insights/metricDefinitions/read
+Microsoft.IoTCentral/IoTApps/providers/Microsoft.Insights/diagnosticSettings/read
+Microsoft.IoTCentral/IoTApps/providers/Microsoft.Insights/diagnosticSettings/write
+
+------------------
+IOT Central App Templates:
+------------------
+
+iotc-condition
+iotc-consumption
+iotc-distribution
+iotc-inventory
+iotc-logistics
+iotc-meter
+iotc-mfc
+iotc-patient
+iotc-pnp-preview
+iotc-power
+iotc-quality
+iotc-store
+iotc-video-analytics-om
+iotc-waste
+
+------------------
+Apps in Resource Group:
+------------------
+
+Name:gaviswanapp21636580090, Location: eastus
+Name:gtest1, Location: westus
+Name:gaviswanapp21636578314, Location: eastus
+
+------------------
+Create/Update App:
+------------------
+
+randomizedName: gaviswanapp21636580731
+App created successfully.
+------------------
+Get App:
+------------------
+
+Name:gaviswanapp21636580731, Location: eastus, com.azure.resourcemanager.iotcentral.implementation.AppImpl@2df8aa39
+
+------------------
+Update App:
+------------------
+
+App updated successfully.
+
+------------------
+Delete App:
+------------------
+
+App deleted!
+
+------------------
+Validating Exceptions:
+------------------
+
+randomizedName: gaviswanapp21636580772
+Validated error with use of geo location.
+------------------
+Validating Exceptions:
+------------------
+
+randomizedName: gaviswanapp21636580772
+Validated error with invalid sku 'S1'.
+------------------
+Validating Exceptions:
+------------------
+
+randomizedName: gaviswanapp21636580775
+Validated error with F1 sku.
+[INFO] ------------------------------------------------------------------------
+[INFO] BUILD SUCCESS
+[INFO] ------------------------------------------------------------------------
+[INFO] Total time:  53.902 s
+[INFO] Finished at: 2021-11-10T13:46:18-08:00
+[INFO] ------------------------------------------------------------------------

java/pom.xml

@@ -0,0 +1,76 @@
+<?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.microsoft.azure.iotcentral</groupId>
+    <artifactId>azure-iot-central-java-sdk-samples</artifactId>
+    <version>2.0-SNAPSHOT</version>
+    <build>
+        <sourceDirectory>${basedir}/src/main</sourceDirectory>
+        <scriptSourceDirectory>${basedir}/src/main/scripts</scriptSourceDirectory>
+        <testSourceDirectory>${basedir}/src/test</testSourceDirectory>
+        <outputDirectory>${basedir}/target/classes</outputDirectory>
+        <testOutputDirectory>${basedir}/target/test-classes</testOutputDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>1.6.0</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>java</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <mainClass>Main</mainClass>
+                    <cleanupDaemonThreads>false</cleanupDaemonThreads>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/com.azure/azure-core-http-netty -->
+        <dependency>
+            <groupId>com.azure</groupId>
+            <artifactId>azure-core-http-netty</artifactId>
+            <version>1.11.1</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.azure.resourcemanager/azure-resourcemanager -->
+        <dependency>
+            <groupId>com.azure.resourcemanager</groupId>
+            <artifactId>azure-resourcemanager</artifactId>
+            <version>2.9.0</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.azure/azure-core -->
+        <dependency>
+            <groupId>com.azure</groupId>
+            <artifactId>azure-core</artifactId>
+            <version>1.21.0</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.azure/azure-identity -->
+        <dependency>
+            <groupId>com.azure</groupId>
+            <artifactId>azure-identity</artifactId>
+            <version>1.4.0</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.azure.resourcemanager/azure-resourcemanager-iotcentral -->
+        <dependency>
+            <groupId>com.azure.resourcemanager</groupId>
+            <artifactId>azure-resourcemanager-iotcentral</artifactId>
+            <version>1.0.0-beta.2</version>
+        </dependency>
+    </dependencies>
+</project>