com.amazonaws.auth

Class InstanceProfileCredentialsProvider

java.lang.Object

com.amazonaws.auth.InstanceProfileCredentialsProvider

All Implemented Interfaces:

AWSCredentialsProvider

public class InstanceProfileCredentialsProvider
extends Object
implements AWSCredentialsProvider

Credentials provider implementation that loads credentials from the Amazon EC2 Instance Metadata Service.

Field Summary

Fields

Modifier and Type	Field and Description
protected AWSCredentials	credentials The current instance profile credentials
protected Date	credentialsExpiration The expiration for the current instance profile credentials
protected Date	lastInstanceProfileCheck The time of the last attempt to check for new credentials

Constructor Summary

Constructors

Constructor and Description
InstanceProfileCredentialsProvider()
InstanceProfileCredentialsProvider(boolean refreshCredentialsAsync) Spins up a new thread to refresh the credentials asynchronously if refreshCredentialsAsync is set to true, otherwise the credentials will be refreshed from the instance metadata service synchronously,

Method Summary

Methods

Modifier and Type	Method and Description
protected void	finalize()
AWSCredentials	getCredentials() Returns AWSCredentials which the caller can use to authorize an AWS request.
protected boolean	needsToLoadCredentials()
void	refresh() Forces this credentials provider to refresh its credentials.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

credentials

protected volatile AWSCredentials credentials

The current instance profile credentials

credentialsExpiration

protected volatile Date credentialsExpiration

The expiration for the current instance profile credentials

lastInstanceProfileCheck

protected volatile Date lastInstanceProfileCheck

The time of the last attempt to check for new credentials

Constructor Detail

InstanceProfileCredentialsProvider

public InstanceProfileCredentialsProvider()

InstanceProfileCredentialsProvider

public InstanceProfileCredentialsProvider(boolean refreshCredentialsAsync)

Spins up a new thread to refresh the credentials asynchronously if refreshCredentialsAsync is set to true, otherwise the credentials will be refreshed from the instance metadata service synchronously,

Parameters:

refreshCredentialsAsync - true if credentials needs to be refreshed asynchronously else false.

Method Detail

getCredentials

public AWSCredentials getCredentials()

Description copied from interface: AWSCredentialsProvider

Returns AWSCredentials which the caller can use to authorize an AWS request. Each implementation of AWSCredentialsProvider can chose its own strategy for loading credentials. For example, an implementation might load credentials from an existing key management system, or load new credentials when credentials are rotated.

Specified by:

getCredentials in interface AWSCredentialsProvider

Returns:

AWSCredentials which the caller can use to authorize an AWS request.

refresh

public void refresh()

Description copied from interface: AWSCredentialsProvider

Forces this credentials provider to refresh its credentials. For many implementations of credentials provider, this method may simply be a no-op, such as any credentials provider implementation that vends static/non-changing credentials. For other implementations that vend different credentials through out their lifetime, this method should force the credentials provider to refresh its credentials.

Specified by:

refresh in interface AWSCredentialsProvider

needsToLoadCredentials

protected boolean needsToLoadCredentials()

toString

public String toString()

Overrides:

toString in class Object

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable