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Specifying a Credential Provider or Provider Chain
If you want to specify a different credential provider than the default credential provider chain, you can
specify it in the client constructor.
To specify a specific credentials provider
• Provide an instance of a credentials provider or provider chain to a service client constructor that takes
an AWSCredentialsProvider interface as input. For example, to use environment credentials specifically:
AmazonS3 s3Client = new AmazonS3Client(new EnvironmentVariableCredentialsPro
vider());
For the full list of SDK for Java-supplied credential providers and provider chains, see the list of "All known
implementing classes" in the reference topic for AWSCredentialsProvider.
Tip
You can use this technique to supply credential providers or provider chains that you create, by
implementing your own credential provider that implements the AWSCredentialsProvider
interface, or by sub-classing the AWSCredentialsProviderChain class.
Explicitly Specifying Credentials
If neither the default credential chain or a specific or custom provider or provider chain works for your
code, you can set credentials explicitly by supplying them yourself. If you have retrieved temporary
credentials using AWS STS, use this method to specify the credentials for AWS access.
To explicitly supply credentials to an AWS client:
Instantiate a class that provides the AWSCredentials interface, such as BasicAWSCredentials, supplying
it with the AWS access key and secret key you will use for the connection.
Provide the class instance to a service client constructor that takes an AWSCredentials interface as input.
For example:
BasicAWSCredentials awsCreds = new BasicAWSCredentials(access_key_id,
secret_access_key)
AmazonS3 s3Client = new AmazonS3Client(awsCreds);
When using temporary credentials obtained from AWS STS (p.61), create a BasicSessionCredentials
object, passing it the STS-supplied credentials and session token:
BasicSessionCredentials basic_session_creds = new BasicSessionCredentials(
session_creds.getAccessKeyId(),
session_creds.getSecretAccessKey(),
session_creds.getSessionToken());
AmazonS3Client s3 = new AmazonS3Client(basic_session_creds);
Version v1.0.0
12
AWS SDK for Java Developer Guide
Specifying a Credential Provider or Provider Chain
- AWS SDK for Java 1
- Table of Contents 3
- What is the AWS SDK for Java? 5
- What's in this Guide? 6
- About Amazon Web Services 7
- Getting Started 8
- Install the AWS SDK for Java 9
- Building the SDK with Maven 10
- SDK for Java 11
- Where to Go from Here 12
- AWS SDK for Java Basics 13
- Setting Credentials 14
- AWS Credentials File Format 15
- Loading Credentials 15
- AWS Region Selection 17
- Choosing a Specific Endpoint 18
- Proxy Configuration 18
- HTTP Transport Configuration 19
- TCP Socket Buffer Size Hints 20
- Exception Handling 21
- Setting the Classpath 22
- Access Control Policies 24
- Amazon SNS Example 26
- Version v1.0.0 27
- DynamoDB 27
- Troubleshooting 30
- Limitations 30
- To create a security group 31
- Create a Key Pair 33
- Run an Amazon EC2 Instance 33
- Resources on Amazon EC2 34
- Create an IAM Role 35
- Create your Application 36
- For example: 37
- Overview 39
- Prerequisites 39
- Management 48
- Termination 58
- Bringing It All Together 65
- Important 66
- For more information 68
- To list Amazon SWF domains 69
- Additional Resources 70
- AWS Forums 71
- AWS Toolkit for Eclipse 71
- AWS SDK for Java Code Samples 71
- Code Samples 72
- Command Line 73
- Eclipse IDE 74
- To run the project 75
- Document History 76
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