User guide

run:

[java] Downloading an object

[java] AmazonServiceException

BUILD SUCCESSFUL

Transfer the Compiled Program to Your EC2 Instance

Transfer the program to your EC2 instance using secure copy (scp), along with the SDK for Java libraries.

The sequence of commands looks something like the following. Depending on the Linux distribution that

you used, the user name might be "ec2-user", "root", or "ubuntu". To get the public DNS name of your

instance, select it in the Amazon EC2 console, and then look for Public DNS in the Description tab (for

example, ec2-198-51-100-1.compute-1.amazonaws.com).

scp -p -i my-key-pair.pem GetS3Object.class ec2-user@public_dns:GetS3Object.class

scp -p -i my-key-pair.pem build.xml ec2-user@public_dns:build.xml

scp -r -p -i my-key-pair.pem lib ec2-user@public_dns:lib

scp -r -p -i my-key-pair.pem third-party ec2-user@public_dns:third-party

In the preceding commands, GetS3Object.class is your compiled program, build.xml is the ant file

used to build and run your program, and the lib and third-party directories are the corresponding

library folders from the SDK for Java.

The -r switch indicates that scp should do a recursive copy of all of the contents of the library and

third-party directories from the SDK for Java.

The -p switch indicates that scp should preserve the permissions of the source files when it copies them

to the destination. If you are copying the files from Windows, you might need to fix the permissions on

your instance using the following command:

chmod -R u+rwx GetS3Object.class build.xml lib third-party

Run the Sample Program on the EC2 Instance

To run the program, connect to your EC2 instance. For more information, see Connect to Your Linux

Instance in the Amazon EC2 User Guide for Linux Instances.

If ant is not installed on your instance, you can install it using the yum installer as follows:

sudo yum install ant

Run the program using ant as follows:

ant getS3Object

The program should write the contents of your Amazon S3 object to your command window.

Version v1.0.0

AWS SDK for Java Developer Guide

Using IAM Roles for EC2 Instances