Get AWS Billing by tag

AwsBillingUtils.java

import com.amazonaws.regions.Regions;
import com.amazonaws.services.costexplorer.AWSCostExplorer;
import com.amazonaws.services.costexplorer.AWSCostExplorerClientBuilder;
import com.amazonaws.services.costexplorer.model.DateInterval;
import com.amazonaws.services.costexplorer.model.GetCostAndUsageRequest;
import com.amazonaws.services.costexplorer.model.GetCostAndUsageResult;
import com.amazonaws.services.costexplorer.model.Group;
import com.amazonaws.services.costexplorer.model.GroupDefinition;
import com.amazonaws.services.costexplorer.model.GroupDefinitionType;
import com.amazonaws.services.costexplorer.model.MetricValue;
import com.amazonaws.services.costexplorer.model.ResultByTime;

import java.util.Map;

/*
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk</artifactId>
            <version>1.11.453</version>
        </dependency>
*/

public class AwsBillingUtils {
    public static void main(String[] args) {
        String startDate = "2018-11-01";
        String endDate = "2018-11-30";
        String tagName = "Name";
        String tagValue = "tag1";
        
        AWSCostExplorer awsCostExplorer = AWSCostExplorerClientBuilder.standard()
            .withRegion(Regions.US_WEST_2)
            .build();
        
        GroupDefinition groupDefinition = new GroupDefinition().withType(GroupDefinitionType.TAG).withKey(tagName + "$" + tagValue);
        GetCostAndUsageRequest costAndUsageRequest
            = new GetCostAndUsageRequest()
            .withTimePeriod(new DateInterval().withStart(startDate).withEnd(endDate))
            .withGroupBy(groupDefinition)
            .withGranularity("MONTHLY") // 
            .withMetrics("BlendedCost");
        GetCostAndUsageResult costAndUsage = awsCostExplorer.getCostAndUsage(costAndUsageRequest);

        int i = 0;

        for(ResultByTime resultByTime: costAndUsage.getResultsByTime()) {
            for(Group group: resultByTime.getGroups()) {
                String metricKey = "Name$vantage-ss1$";

                if (group.getKeys().contains(metricKey)) {
                    Map<String, MetricValue> metrics = group.getMetrics();
                    System.out.println("Cost for stack " + metricKey + " is : " + metrics.get("BlendedCost"));
                }
            }
        }
    }
}