com.amazonaws.services.cognitoidentity

Interface AmazonCognitoIdentity

All Known Implementing Classes:

AmazonCognitoIdentityClient

public interface AmazonCognitoIdentity

Interface for accessing AmazonCognitoIdentity. Amazon Cognito

Amazon Cognito is a web service that delivers scoped temporary credentials to mobile devices and other untrusted environments. Amazon Cognito uniquely identifies a device and supplies the user with a consistent identity over the lifetime of an application.

Using Amazon Cognito, you can enable authentication with one or more third-party identity providers (Facebook, Google, or Login with Amazon), and you can also choose to support unauthenticated access from your app. Cognito delivers a unique identifier for each user and acts as an OpenID token provider trusted by AWS Security Token Service (STS) to access temporary, limited-privilege AWS credentials.

To provide end-user credentials, first make an unsigned call to GetId. If the end user is authenticated with one of the supported identity providers, set the Logins map with the identity provider token. GetId returns a unique identifier for the user.

Next, make an unsigned call to GetCredentialsForIdentity. This call expects the same Logins map as the GetId call, as well as the IdentityID originally returned by GetId . Assuming your identity pool has been configured via the SetIdentityPoolRoles operation, GetCredentialsForIdentity will return AWS credentials for your use. If your pool has not been configured with SetIdentityPoolRoles , or if you want to follow legacy flow, make an unsigned call to GetOpenIdToken, which returns the OpenID token necessary to call STS and retrieve AWS credentials. This call expects the same Logins map as the GetId call, as well as the IdentityID originally returned by GetId . The token returned by GetOpenIdToken can be passed to the STS operation AssumeRoleWithWebIdentity to retrieve AWS credentials.

If you want to use Amazon Cognito in an Android, iOS, or Unity application, you will probably want to make API calls via the AWS Mobile SDK. To learn more, see the AWS Mobile SDK Developer Guide .

Method Summary

Modifier and Type	Method and Description
ResponseMetadata	getCachedResponseMetadata(AmazonWebServiceRequest request) Returns additional metadata for a previously executed successful request, typically used for debugging issues where a service isn't acting as expected.
GetCredentialsForIdentityResult	getCredentialsForIdentity(GetCredentialsForIdentityRequest getCredentialsForIdentityRequest) Returns credentials for the provided identity ID.
GetIdResult	getId(GetIdRequest getIdRequest) Generates (or retrieves) a Cognito ID.
GetOpenIdTokenResult	getOpenIdToken(GetOpenIdTokenRequest getOpenIdTokenRequest) Gets an OpenID token, using a known Cognito ID.
void	setEndpoint(String endpoint) Overrides the default endpoint for this client ("https://cognito-identity.us-east-1.amazonaws.com").
void	setRegion(Region region) An alternative to setEndpoint(String), sets the regional endpoint for this client's service calls.
void	shutdown() Shuts down this client object, releasing any resources that might be held open.

Method Detail

setEndpoint

void setEndpoint(String endpoint)
          throws IllegalArgumentException

Overrides the default endpoint for this client ("https://cognito-identity.us-east-1.amazonaws.com"). Callers can use this method to control which AWS region they want to work with.

Callers can pass in just the endpoint (ex: "cognito-identity.us-east-1.amazonaws.com") or a full URL, including the protocol (ex: "https://cognito-identity.us-east-1.amazonaws.com"). If the protocol is not specified here, the default protocol from this client's ClientConfiguration will be used, which by default is HTTPS.

For more information on using AWS regions with the AWS SDK for Java, and a complete list of all available endpoints for all AWS services, see: http://developer.amazonwebservices.com/connect/entry.jspa?externalID=3912

This method is not threadsafe. An endpoint should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.

Parameters:

endpoint - The endpoint (ex: "cognito-identity.us-east-1.amazonaws.com") or a full URL, including the protocol (ex: "https://cognito-identity.us-east-1.amazonaws.com") of the region specific AWS endpoint this client will communicate with.

Throws:

IllegalArgumentException - If any problems are detected with the specified endpoint.

setRegion

void setRegion(Region region)
        throws IllegalArgumentException

An alternative to setEndpoint(String), sets the regional endpoint for this client's service calls. Callers can use this method to control which AWS region they want to work with.

By default, all service endpoints in all regions use the https protocol. To use http instead, specify it in the ClientConfiguration supplied at construction.

This method is not threadsafe. A region should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.

Parameters:

region - The region this client will communicate with. See Region.getRegion(com.amazonaws.regions.Regions) for accessing a given region.

Throws:

IllegalArgumentException - If the given region is null, or if this service isn't available in the given region. See Region.isServiceSupported(String)

See Also:

Region.getRegion(com.amazonaws.regions.Regions), Region.createClient(Class, com.amazonaws.auth.AWSCredentialsProvider, ClientConfiguration)

getId

GetIdResult getId(GetIdRequest getIdRequest)
           throws AmazonServiceException,
                  AmazonClientException

Generates (or retrieves) a Cognito ID. Supplying multiple logins will create an implicit linked account.

This is a public API. You do not need any credentials to call this API.

Parameters:

getIdRequest - Container for the necessary parameters to execute the GetId service method on AmazonCognitoIdentity.

Returns:

The response from the GetId service method, as returned by AmazonCognitoIdentity.

Throws:

ResourceConflictException

InternalErrorException

LimitExceededException

NotAuthorizedException

InvalidParameterException

TooManyRequestsException

ResourceNotFoundException

ExternalServiceException

AmazonClientException - If any internal errors are encountered inside the client while attempting to make the request or handle the response. For example if a network connection is not available.

AmazonServiceException - If an error response is returned by AmazonCognitoIdentity indicating either a problem with the data in the request, or a server side issue.

getCredentialsForIdentity

GetCredentialsForIdentityResult getCredentialsForIdentity(GetCredentialsForIdentityRequest getCredentialsForIdentityRequest)
                                                   throws AmazonServiceException,
                                                          AmazonClientException

Returns credentials for the provided identity ID. Any provided logins will be validated against supported login providers. If the token is for cognito-identity.amazonaws.com, it will be passed through to AWS Security Token Service with the appropriate role for the token.

This is a public API. You do not need any credentials to call this API.

Parameters:

getCredentialsForIdentityRequest - Container for the necessary parameters to execute the GetCredentialsForIdentity service method on AmazonCognitoIdentity.

Returns:

The response from the GetCredentialsForIdentity service method, as returned by AmazonCognitoIdentity.

Throws:

ResourceConflictException

InternalErrorException

InvalidIdentityPoolConfigurationException

NotAuthorizedException

InvalidParameterException

TooManyRequestsException

ResourceNotFoundException

ExternalServiceException

AmazonClientException - If any internal errors are encountered inside the client while attempting to make the request or handle the response. For example if a network connection is not available.

AmazonServiceException - If an error response is returned by AmazonCognitoIdentity indicating either a problem with the data in the request, or a server side issue.

getOpenIdToken

GetOpenIdTokenResult getOpenIdToken(GetOpenIdTokenRequest getOpenIdTokenRequest)
                             throws AmazonServiceException,
                                    AmazonClientException

Gets an OpenID token, using a known Cognito ID. This known Cognito ID is returned by GetId. You can optionally add additional logins for the identity. Supplying multiple logins creates an implicit link.

The OpenId token is valid for 15 minutes.

This is a public API. You do not need any credentials to call this API.

Parameters:

getOpenIdTokenRequest - Container for the necessary parameters to execute the GetOpenIdToken service method on AmazonCognitoIdentity.

Returns:

The response from the GetOpenIdToken service method, as returned by AmazonCognitoIdentity.

Throws:

ResourceConflictException

InternalErrorException

NotAuthorizedException

InvalidParameterException

TooManyRequestsException

ResourceNotFoundException

ExternalServiceException

AmazonClientException - If any internal errors are encountered inside the client while attempting to make the request or handle the response. For example if a network connection is not available.

AmazonServiceException - If an error response is returned by AmazonCognitoIdentity indicating either a problem with the data in the request, or a server side issue.

shutdown

void shutdown()

Shuts down this client object, releasing any resources that might be held open. This is an optional method, and callers are not expected to call it, but can if they want to explicitly release any open resources. Once a client has been shutdown, it should not be used to make any more requests.

getCachedResponseMetadata

ResponseMetadata getCachedResponseMetadata(AmazonWebServiceRequest request)

Returns additional metadata for a previously executed successful request, typically used for debugging issues where a service isn't acting as expected. This data isn't considered part of the result data returned by an operation, so it's available through this separate, diagnostic interface.

Response metadata is only cached for a limited period of time, so if you need to access this extra diagnostic information for an executed request, you should use this method to retrieve it as soon as possible after executing a request.

Parameters:

request - The originally executed request.

Returns:

The response metadata for the specified request, or null if none is available.