CODEWITHSUNDEEP
amazon-web-servicesamazon-s3aws-java-sdk
user2677679
user2677679

Reputation: 258

how to execute AWS CLI commands from Java code?

How can I execute the following from Java code to get the S3 bucket size aws s3api list-objects --bucket BUCKETNAME --output json --query "[sum(Contents[].Size), length(Contents[])]"

Upvotes: 1

Views: 8926

Answers (1)

TJCloudmin
TJCloudmin

Reputation: 165

Java's ProcessBuilder class can call the AWS CLI from Java pretty easily :

ProcessBuilder pb = new ProcessBuilder( yourCliCommandWithArgs );
Process process = pb.start();
BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
... then consume the CLI output as input.

I would use AWS Java SDK, and the equivalent to list objects for one path would be 

ListVersionsRequest listVersionsRequest = new ListVersionsRequest()
                .withBucketName( yourBucketName )
                .withDelimiter( pathDelimiter ).withPrefix( "your/path/" );

You might have better luck with the Cloudwatch API, it provides total bucket sizes through the CLI and SDK BucketSizeBytes . http://docs.aws.amazon.com/AmazonS3/latest/dev/cloudwatch-monitoring.html

I use http://www.insight4storage.com/ from AWS Marketplace to track my AWS S3 storage usage trends by prefix, bucket or storage class over time. Its easier than the CLI or SDK.

Upvotes: 0

Related Questions