Quickstart: Run your first Resource Graph query using Java

Članak
07/20/2021
3 min. za čitanje

The first step to using Azure Resource Graph is to check that the required Maven packages for Java are installed. This quickstart walks you through the process of adding the Maven packages to your Java installation.

At the end of this process, you'll have added the Maven packages to your Java installation and run your first Resource Graph query.

Prerequisites

An Azure subscription. If you don't have an Azure subscription, create a free account before you begin.
Check that the latest Azure CLI is installed (at least 2.21.0). If it isn't yet installed, see Install the Azure CLI.

Note

Azure CLI is required to enable Azure SDK for Java to use the CLI-based authentication in the following examples. For information about other options, see Azure Identity client library for Java.
The Java Developer Kit, version 8.
Apache Maven, version 3.6 or above.

Create the Resource Graph project

To enable Java to query Azure Resource Graph, create and configure a new application with Maven and install the required Maven packages.

Initialize a new Java application named "argQuery" with a Maven archetype:

mvn -B archetype:generate -DarchetypeGroupId="org.apache.maven.archetypes" -DgroupId="com.Fabrikam" -DartifactId="argQuery"

Change directories into the new project folder argQuery and open pom.xml in your favorite editor. Add the following <dependency> nodes under the existing <dependencies> node:

 <dependency>
     <groupId>com.azure</groupId>
     <artifactId>azure-identity</artifactId>
     <version>1.2.4</version>
 </dependency>
 <dependency>
     <groupId>com.azure.resourcemanager</groupId>
     <artifactId>azure-resourcemanager-resourcegraph</artifactId>
     <version>1.0.0</version>
 </dependency>

In the pom.xml file, add the following <properties> node under the base <project> node to update the source and target versions:

<properties>
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
</properties>

In the pom.xml file, add the following <build> node under the base <project> node to configure the goal and main class for the project to run.

<build>
    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.2.1</version>
            <executions>
                <execution>
                    <goals>
                        <goal>java</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <mainClass>com.Fabrikam.App</mainClass>
            </configuration>
        </plugin>
    </plugins>
</build>

Replace the default App.java in \argQuery\src\main\java\com\Fabrikam with the following code and save the updated file:

package com.Fabrikam;

import java.util.Arrays;
import java.util.List;
import com.azure.core.management.AzureEnvironment;
import com.azure.core.management.profile.AzureProfile;
import com.azure.identity.DefaultAzureCredentialBuilder;
import com.azure.resourcemanager.resourcegraph.ResourceGraphManager;
import com.azure.resourcemanager.resourcegraph.models.QueryRequest;
import com.azure.resourcemanager.resourcegraph.models.QueryRequestOptions;
import com.azure.resourcemanager.resourcegraph.models.QueryResponse;
import com.azure.resourcemanager.resourcegraph.models.ResultFormat;

public class App
{
    public static void main( String[] args )
    {
        List<String> listSubscriptionIds = Arrays.asList(args[0]);
        String strQuery = args[1];

        ResourceGraphManager manager = ResourceGraphManager.authenticate(new DefaultAzureCredentialBuilder().build(), new AzureProfile(AzureEnvironment.AZURE));

        QueryRequest queryRequest = new QueryRequest()
            .withSubscriptions(listSubscriptionIds)
            .withQuery(strQuery);

        QueryResponse response = manager.resourceProviders().resources(queryRequest);

        System.out.println("Records: " + response.totalRecords());
        System.out.println("Data:\n" + response.data());
    }
}

Build the argQuery console application:
```
mvn package
```

Run your first Resource Graph query

With the Java console application built, it's time to try out a simple Resource Graph query. The query returns the first five Azure resources with the Name and Resource Type of each resource.

In each call to argQuery, there are variables that are used that you need to replace with your own values:

{subscriptionId} - Replace with your subscription ID
{query} - Replace with your Azure Resource Graph query

Use the Azure CLI to authenticate with az login.
Change directories to the argQuery project folder you created with the previous mvn -B archetype:generate command.
Run your first Azure Resource Graph query using Maven to compile the console application and pass the arguments. The exec.args property identifies arguments by spaces. To identify the query as a single argument, we wrap it with single quotes (').
```
mvn compile exec:java -Dexec.args "{subscriptionId} 'Resources | project name, type | limit 5'"
```
Note

As this query example doesn't provide a sort modifier such as order by, running this query multiple times is likely to yield a different set of resources per request.
Change the argument to argQuery.exe and change the query to order by the Name property:
```
mvn compile exec:java -Dexec.args "{subscriptionId} 'Resources | project name, type | limit 5 | order by name asc'"
```
Note

Just as with the first query, running this query multiple times is likely to yield a different set of resources per request. The order of the query commands is important. In this example, the order by comes after the limit. This command order first limits the query results and then orders them.
Change the final parameter to argQuery.exe and change the query to first order by the Name property and then limit to the top five results:
```
mvn compile exec:java -Dexec.args "{subscriptionId} 'Resources | project name, type | order by name asc | limit 5'"
```

When the final query is run several times, assuming that nothing in your environment is changing, the results returned are consistent and ordered by the Name property, but still limited to the top five results.

Clean up resources

If you wish to remove the Java console application and installed packages, you can do so by deleting the argQuery project folder.

Next steps

In this quickstart, you've created a Java console application with the required Resource Graph packages and run your first query. To learn more about the Resource Graph language, continue to the query language details page.

Get more information about the query language