User guide

Bringing It All Together
To bring this all together, we provide a more object-oriented approach that combines the preceding steps
we showed: initializing the EC2 Client, submitting the Spot Request, determining when the Spot Requests
are no longer in the open state, and cleaning up any lingering Spot request and associated instances.
We create a class called Requests that performs these actions.
We also create a GettingStartedApp class, which has a main method where we perform the high level
function calls. Specifically, we initialize the Requests object described previously. We submit the Spot
Instance request. Then we wait for the Spot request to reach the "Active" state. Finally, we clean up the
requests and instances.
The complete source code is available for download at GitHub.
Congratulations! You have just completed the getting started tutorial for developing Spot Instance software
with the AWS SDK for Java.
Next Steps
We recommend that you take the Java Developers: Tutorial: Advanced Amazon EC2 Spot Request
Management (p. 44).
Tutorial: Advanced Amazon EC2 Spot Request
Management
Overview
Spot Instances allow you to bid on unused Amazon Elastic Compute Cloud (Amazon EC2) capacity and
run those instances for as long as your bid exceeds the current Spot Price. Amazon EC2 changes the
Spot Price periodically based on supply and demand. Customers whose bids meet or exceed the Spot
Price gain access to the available Spot Instances. Like On-Demand Instances and Reserved Instances,
Spot Instances provide you an additional option for obtaining more compute capacity.
Spot Instances can significantly lower your Amazon EC2 costs for batch processing, scientific research,
image processing, video encoding, data and web crawling, financial analysis, and testing. Additionally,
Spot Instances can provide access to large amounts of additional compute capacity when your need for
the capacity is not urgent.
This tutorial provides a quick overview of some advanced Spot Request features, such as detailed options
to create Spot requests, alternative methods for launching Spot Instances, and methods to manage your
instances.This tutorial is not meant to be a complete list of all advanced topics associated with Spot
Instances. Instead, it gives you a quick reference of code samples for some of the commonly used methods
for managing Spot Requests and Spot Instances.
Prerequisites
To use this tutorial you need to be signed up for Amazon Web Services (AWS). If you have not yet signed
up for AWS, go to the Amazon Web Services website, and click Create an AWS Account in the upper
right corner of the page. In addition, you also need to install the AWS SDK for Java.
If you are using the Eclipse development environment, we recommend that you install the AWS Toolkit
for Eclipse. The Toolkit for Eclipse includes the latest version of the AWS SDK for Java.
Version v1.0.0
44
AWS SDK for Java Developer Guide
Tutorial: Advanced Amazon EC2 Spot Request
Management