Category: Java

The high-level save API of DynamoDBMapper provides a convenient way of persisting items in an Amazon DynamoDB table. The underlying implementation uses either a PutItem request to create a new item or an UpdateItem request to edit the existing item. In order to exercise finer control over the low-level service requests, you can use a […]

We’re all getting very excited about AWS re:Invent 2013. In just over a month, we’ll be down in Las Vegas talking to developers and customers from all over the world. There’s a huge amount of great technical content this year, and attendees will be taking home lots of knowledge on the latest and greatest features […]

Today we’re excited to talk about the new S3Link class. S3Link allows you to easily link to an Amazon S3 resource in your Amazon DynamoDB data. You can use S3Link when storing Java objects in Amazon DynamoDB tables with the DynamoDBMapper class. To use the new S3Link class, just add a member of type S3Link […]

We released version 1.6.0 of the AWS SDK for Java last Friday. This version has some exciting features! A new type of POJO attribute named S3Link for the DynamoDBMapper class. This new attribute allows you to easily work with binary data in Amazon S3 and store links to that data in Amazon DynamoDB. The Amazon […]

In addition to all the cool features in TransferManager around asynchronous upload and download management, there are some other great features around batched uploads and downloads of multiple files. The uploadDirectory and uploadFileList methods in TransferManager make it easy to upload a complete directory, or a list of specific files to Amazon S3, as one […]

Are you or your company using Amazon EC2 instances? Are you using Amazon EC2 Reserved Instances yet? Reserved Instances are often one of the easiest and most effective ways to save money on your Amazon EC2 bill. They can allow you to significantly reduce the price you pay for Amazon EC2 instance hours over a […]

In many applications, it’s important to make sure your code handles creating any resources that it needs in order to run. Otherwise, you’ll have to manually create those resources whenever you want to run your application with a new AWS account. For example, if you have an application that needs to store data in an […]

Today we’re excited to talk about a brand new open source project on our GitHub page for managing Apache Tomcat sessions in Amazon DynamoDB! DynamoDB’s fast and predictable performance characteristics make it a great match for handling session data. Plus, since it’s a fully-managed NoSQL database service, you avoid all the work of maintaining and […]

No matter what type of application you’re developing, it’s a safe bet that it probably needs to save or load data from a central data store, such as Amazon S3. During development, you can take advantage of the Amazon S3 management tools provided by the AWS Toolkit for Eclipse, all without ever leaving your IDE. […]

Earlier this year, Amazon DynamoDB released support for local secondary indexes. At that time, the AWS SDK for Java added support for LSIs, for both the low-level(AmazonDynamoDBClient) and high-level(DynamoDBMapper) APIs in the com.amazonaws.services.dynamodbv2 package. Since then, I have seen a few questions on how to use the DynamoDBMapper with local secondary indexes. In this post, […]