User guide

// Initializes a Spot Instance Request
RequestSpotInstancesRequest requestRequest = new RequestSpotInstances
Request();
// Request 1 x t1.micro instance with a bid price of $0.03.
20 requestRequest.setSpotPrice("0.03");
requestRequest.setInstanceCount(Integer.valueOf(1));
// Set up the specifications of the launch. This includes the
// instance type (e.g. t1.micro) and the latest Amazon Linux
25 // AMI id available. Note, you should always use the latest
// Amazon Linux AMI id or another of your choosing.
LaunchSpecification launchSpecification = new LaunchSpecification();
launchSpecification.setImageId("ami-8c1fece5");
launchSpecification.setInstanceType("t1.micro");
30
// Add the security group to the request.
ArrayList<String> securityGroups = new ArrayList<String>();
securityGroups.add("GettingStartedGroup");
launchSpecification.setSecurityGroups(securityGroups);
35
// Add the launch specification.
requestRequest.setLaunchSpecification(launchSpecification);
// Call the RequestSpotInstance API.
40 RequestSpotInstancesResult requestResult = ec2.requestSpotInstances(re
questRequest);
Persistent vs. One-Time Requests
When building a Spot request, you can specify several optional parameters. The first is whether your
request is one-time only or persistent. By default, it is a one-time request. A one-time request can be
fulfilled only once, and after the requested instances are terminated, the request will be closed. A persistent
request is considered for fulfillment whenever there is no Spot Instance running for the same request. To
specify the type of request, you simply need to set the Type on the Spot request. This can be done with
the following code.
1
// Retrieves the credentials from an
// AWSCredentials.properties file.
AWSCredentials credentials = null;
5 try {
credentials = new PropertiesCredentials(
GettingStartedApp.class.getResourceAsStream("AwsCredentials.proper
ties"));
} catch (IOException e1) {
System.out.println("Credentials were not properly entered into AwsCre
dentials.properties.");
10 System.out.println(e1.getMessage());
System.exit(-1);
}
// Create the AmazonEC2Client object so we can call various APIs.
15 AmazonEC2 ec2 = new AmazonEC2Client(credentials);
Version v1.0.0
48
AWS SDK for Java Developer Guide
Tutorial: Advanced Amazon EC2 Spot Request
Management