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.

Constructor Summary

Constructors

Constructor and Description
InstanceProfileCredentialsProvider() Deprecated. for the singleton method getInstance().
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

Modifier and Type	Method and Description
static InstanceProfileCredentialsProvider	createAsyncRefreshingProvider(boolean eagerlyRefreshCredentialsAsync) Spins up a new thread to refresh the credentials asynchronously.
protected void	finalize()
AWSCredentials	getCredentials() Returns AWSCredentials which the caller can use to authorize an AWS request.
static InstanceProfileCredentialsProvider	getInstance() Returns a singleton InstanceProfileCredentialsProvider that does not refresh credentials asynchronously.
void	refresh() Forces this credentials provider to refresh its credentials.

Methods inherited from class java.lang.Object

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

Constructor Detail

InstanceProfileCredentialsProvider

@Deprecated
public InstanceProfileCredentialsProvider()

Deprecated. for the singleton method getInstance().

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

createAsyncRefreshingProvider

public static InstanceProfileCredentialsProvider createAsyncRefreshingProvider(boolean eagerlyRefreshCredentialsAsync)

Spins up a new thread to refresh the credentials asynchronously.

Parameters:

eagerlyRefreshCredentialsAsync - when set to false will not attempt to refresh credentials asynchronously until after a call has been made to getCredentials() - ensures that EC2CredentialsFetcher.getCredentials() is only hit when this CredentialProvider is actually required

getInstance

public static InstanceProfileCredentialsProvider getInstance()

Returns a singleton InstanceProfileCredentialsProvider that does not refresh credentials asynchronously. Use InstanceProfileCredentialsProvider(boolean) for the feature.

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable

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