com.amazonaws.auth
Class AWSCredentialsProviderChain

java.lang.Object
  com.amazonaws.auth.AWSCredentialsProviderChain

All Implemented Interfaces:

AWSCredentialsProvider

Direct Known Subclasses:

DefaultAWSCredentialsProviderChain

public class AWSCredentialsProviderChain
extends Object
implements AWSCredentialsProvider

AWSCredentialsProvider implementation that chains together multiple credentials providers. When a caller requests credentials from this provider, it calls all the providers in the chain, in the original order specified, until one can provide credentials, and then returns those credentials. If all of the credential providers in the chain have been called, and none of them can provide credentials, then this class will throw an exception indicated that no credentials are available.

Constructor Summary

AWSCredentialsProviderChain(AWSCredentialsProvider... credentialsProviders)
Constructs a new AWSCredentialsProviderChain with the specified credential providers.

Method Summary

AWSCredentials	getCredentials() Returns AWSCredentials which the caller can use to authorize an AWS request.
void	refresh() Forces this credentials provider to refresh its credentials.

Methods inherited from class java.lang.Object

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

Constructor Detail

AWSCredentialsProviderChain

public AWSCredentialsProviderChain(AWSCredentialsProvider... credentialsProviders)

Constructs a new AWSCredentialsProviderChain with the specified credential providers. When credentials are requested from this provider, it will call each of these credential providers in the same order specified here until one of them returns AWS security credentials.

Parameters:

credentialsProviders - The chain of credentials providers.

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