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/*
* Copyright 2011-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"). You may not
* use this file except in compliance with the License. A copy of the License is
* located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.amazonaws.services.cloudfront;
import com.amazonaws.*;
import com.amazonaws.regions.*;
import com.amazonaws.services.cloudfront.model.*;
/**
* Interface for accessing CloudFront.
*/
public interface AmazonCloudFront {
/**
* The region metadata service name for computing region endpoints. You can
* use this value to retrieve metadata (such as supported regions) of the
* service.
*
* @see RegionUtils#getRegionsForService(String)
*/
String ENDPOINT_PREFIX = "cloudfront";
/**
* Overrides the default endpoint for this client
* ("https://cloudfront.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: "cloudfront.amazonaws.com/")
* or a full URL, including the protocol (ex:
* "https://cloudfront.amazonaws.com/"). If the protocol is not specified
* here, the default protocol from this client's {@link 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.
*
* @param endpoint
* The endpoint (ex: "cloudfront.amazonaws.com/") or a full URL,
* including the protocol (ex: "https://cloudfront.amazonaws.com/")
* of the region specific AWS endpoint this client will communicate
* with.
*/
void setEndpoint(String endpoint);
/**
* An alternative to {@link AmazonCloudFront#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 {@link 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.
*
* @param region
* The region this client will communicate with. See
* {@link Region#getRegion(com.amazonaws.regions.Regions)} for
* accessing a given region. Must not be null and must be a region
* where the service is available.
*
* @see Region#getRegion(com.amazonaws.regions.Regions)
* @see Region#createClient(Class,
* com.amazonaws.auth.AWSCredentialsProvider, ClientConfiguration)
* @see Region#isServiceSupported(String)
*/
void setRegion(Region region);
/**
* Create a new origin access identity.
*
* @param createCloudFrontOriginAccessIdentityRequest
* The request to create a new origin access identity.
* @return Result of the CreateCloudFrontOriginAccessIdentity operation
* returned by the service.
* @throws CloudFrontOriginAccessIdentityAlreadyExistsException
* If the CallerReference is a value you already sent in a previous
* request to create an identity but the content of the
* CloudFrontOriginAccessIdentityConfig is different from the
* original request, CloudFront returns a
* CloudFrontOriginAccessIdentityAlreadyExists error.
* @throws MissingBodyException
* This operation requires a body. Ensure that the body is present
* and the Content-Type header is set.
* @throws TooManyCloudFrontOriginAccessIdentitiesException
* Processing your request would cause you to exceed the maximum
* number of origin access identities allowed.
* @throws InvalidArgumentException
* The argument is invalid.
* @throws InconsistentQuantitiesException
* The value of Quantity and the size of Items do not match.
* @sample AmazonCloudFront.CreateCloudFrontOriginAccessIdentity
*/
CreateCloudFrontOriginAccessIdentityResult createCloudFrontOriginAccessIdentity(
CreateCloudFrontOriginAccessIdentityRequest createCloudFrontOriginAccessIdentityRequest);
/**
* Create a new distribution.
*
* @param createDistributionRequest
* The request to create a new distribution.
* @return Result of the CreateDistribution operation returned by the
* service.
* @throws CNAMEAlreadyExistsException
* @throws DistributionAlreadyExistsException
* The caller reference you attempted to create the distribution
* with is associated with another distribution.
* @throws InvalidOriginException
* The Amazon S3 origin server specified does not refer to a valid
* Amazon S3 bucket.
* @throws InvalidOriginAccessIdentityException
* The origin access identity is not valid or doesn't exist.
* @throws AccessDeniedException
* Access denied.
* @throws TooManyTrustedSignersException
* Your request contains more trusted signers than are allowed per
* distribution.
* @throws TrustedSignerDoesNotExistException
* One or more of your trusted signers do not exist.
* @throws InvalidViewerCertificateException
* @throws InvalidMinimumProtocolVersionException
* @throws MissingBodyException
* This operation requires a body. Ensure that the body is present
* and the Content-Type header is set.
* @throws TooManyDistributionCNAMEsException
* Your request contains more CNAMEs than are allowed per
* distribution.
* @throws TooManyDistributionsException
* Processing your request would cause you to exceed the maximum
* number of distributions allowed.
* @throws InvalidDefaultRootObjectException
* The default root object file name is too big or contains an
* invalid character.
* @throws InvalidRelativePathException
* The relative path is too big, is not URL-encoded, or does not
* begin with a slash (/).
* @throws InvalidErrorCodeException
* @throws InvalidResponseCodeException
* @throws InvalidArgumentException
* The argument is invalid.
* @throws InvalidRequiredProtocolException
* This operation requires the HTTPS protocol. Ensure that you
* specify the HTTPS protocol in your request, or omit the
* RequiredProtocols element from your distribution configuration.
* @throws NoSuchOriginException
* No origin exists with the specified Origin Id.
* @throws TooManyOriginsException
* You cannot create anymore origins for the distribution.
* @throws TooManyCacheBehaviorsException
* You cannot create anymore cache behaviors for the distribution.
* @throws TooManyCookieNamesInWhiteListException
* Your request contains more cookie names in the whitelist than are
* allowed per cache behavior.
* @throws InvalidForwardCookiesException
* Your request contains forward cookies option which doesn't match
* with the expectation for the whitelisted list of cookie names.
* Either list of cookie names has been specified when not allowed
* or list of cookie names is missing when expected.
* @throws TooManyHeadersInForwardedValuesException
* @throws InvalidHeadersForS3OriginException
* @throws InconsistentQuantitiesException
* The value of Quantity and the size of Items do not match.
* @throws TooManyCertificatesException
* You cannot create anymore custom ssl certificates.
* @throws InvalidLocationCodeException
* @throws InvalidGeoRestrictionParameterException
* @throws InvalidProtocolSettingsException
* You cannot specify SSLv3 as the minimum protocol version if you
* only want to support only clients that Support Server Name
* Indication (SNI).
* @throws InvalidTTLOrderException
* @throws InvalidWebACLIdException
* @throws TooManyOriginCustomHeadersException
* @sample AmazonCloudFront.CreateDistribution
*/
CreateDistributionResult createDistribution(
CreateDistributionRequest createDistributionRequest);
/**
* Create a new invalidation.
*
* @param createInvalidationRequest
* The request to create an invalidation.
* @return Result of the CreateInvalidation operation returned by the
* service.
* @throws AccessDeniedException
* Access denied.
* @throws MissingBodyException
* This operation requires a body. Ensure that the body is present
* and the Content-Type header is set.
* @throws InvalidArgumentException
* The argument is invalid.
* @throws NoSuchDistributionException
* The specified distribution does not exist.
* @throws BatchTooLargeException
* @throws TooManyInvalidationsInProgressException
* You have exceeded the maximum number of allowable InProgress
* invalidation batch requests, or invalidation objects.
* @throws InconsistentQuantitiesException
* The value of Quantity and the size of Items do not match.
* @sample AmazonCloudFront.CreateInvalidation
*/
CreateInvalidationResult createInvalidation(
CreateInvalidationRequest createInvalidationRequest);
/**
* Create a new streaming distribution.
*
* @param createStreamingDistributionRequest
* The request to create a new streaming distribution.
* @return Result of the CreateStreamingDistribution operation returned by
* the service.
* @throws CNAMEAlreadyExistsException
* @throws StreamingDistributionAlreadyExistsException
* @throws InvalidOriginException
* The Amazon S3 origin server specified does not refer to a valid
* Amazon S3 bucket.
* @throws InvalidOriginAccessIdentityException
* The origin access identity is not valid or doesn't exist.
* @throws AccessDeniedException
* Access denied.
* @throws TooManyTrustedSignersException
* Your request contains more trusted signers than are allowed per
* distribution.
* @throws TrustedSignerDoesNotExistException
* One or more of your trusted signers do not exist.
* @throws MissingBodyException
* This operation requires a body. Ensure that the body is present
* and the Content-Type header is set.
* @throws TooManyStreamingDistributionCNAMEsException
* @throws TooManyStreamingDistributionsException
* Processing your request would cause you to exceed the maximum
* number of streaming distributions allowed.
* @throws InvalidArgumentException
* The argument is invalid.
* @throws InconsistentQuantitiesException
* The value of Quantity and the size of Items do not match.
* @sample AmazonCloudFront.CreateStreamingDistribution
*/
CreateStreamingDistributionResult createStreamingDistribution(
CreateStreamingDistributionRequest createStreamingDistributionRequest);
/**
* Delete an origin access identity.
*
* @param deleteCloudFrontOriginAccessIdentityRequest
* The request to delete a origin access identity.
* @return Result of the DeleteCloudFrontOriginAccessIdentity operation
* returned by the service.
* @throws AccessDeniedException
* Access denied.
* @throws InvalidIfMatchVersionException
* The If-Match version is missing or not valid for the
* distribution.
* @throws NoSuchCloudFrontOriginAccessIdentityException
* The specified origin access identity does not exist.
* @throws PreconditionFailedException
* The precondition given in one or more of the request-header
* fields evaluated to false.
* @throws CloudFrontOriginAccessIdentityInUseException
* @sample AmazonCloudFront.DeleteCloudFrontOriginAccessIdentity
*/
DeleteCloudFrontOriginAccessIdentityResult deleteCloudFrontOriginAccessIdentity(
DeleteCloudFrontOriginAccessIdentityRequest deleteCloudFrontOriginAccessIdentityRequest);
/**
* Delete a distribution.
*
* @param deleteDistributionRequest
* The request to delete a distribution.
* @return Result of the DeleteDistribution operation returned by the
* service.
* @throws AccessDeniedException
* Access denied.
* @throws DistributionNotDisabledException
* @throws InvalidIfMatchVersionException
* The If-Match version is missing or not valid for the
* distribution.
* @throws NoSuchDistributionException
* The specified distribution does not exist.
* @throws PreconditionFailedException
* The precondition given in one or more of the request-header
* fields evaluated to false.
* @sample AmazonCloudFront.DeleteDistribution
*/
DeleteDistributionResult deleteDistribution(
DeleteDistributionRequest deleteDistributionRequest);
/**
* Delete a streaming distribution.
*
* @param deleteStreamingDistributionRequest
* The request to delete a streaming distribution.
* @return Result of the DeleteStreamingDistribution operation returned by
* the service.
* @throws AccessDeniedException
* Access denied.
* @throws StreamingDistributionNotDisabledException
* @throws InvalidIfMatchVersionException
* The If-Match version is missing or not valid for the
* distribution.
* @throws NoSuchStreamingDistributionException
* The specified streaming distribution does not exist.
* @throws PreconditionFailedException
* The precondition given in one or more of the request-header
* fields evaluated to false.
* @sample AmazonCloudFront.DeleteStreamingDistribution
*/
DeleteStreamingDistributionResult deleteStreamingDistribution(
DeleteStreamingDistributionRequest deleteStreamingDistributionRequest);
/**
* Get the information about an origin access identity.
*
* @param getCloudFrontOriginAccessIdentityRequest
* The request to get an origin access identity's information.
* @return Result of the GetCloudFrontOriginAccessIdentity operation
* returned by the service.
* @throws NoSuchCloudFrontOriginAccessIdentityException
* The specified origin access identity does not exist.
* @throws AccessDeniedException
* Access denied.
* @sample AmazonCloudFront.GetCloudFrontOriginAccessIdentity
*/
GetCloudFrontOriginAccessIdentityResult getCloudFrontOriginAccessIdentity(
GetCloudFrontOriginAccessIdentityRequest getCloudFrontOriginAccessIdentityRequest);
/**
* Get the configuration information about an origin access identity.
*
* @param getCloudFrontOriginAccessIdentityConfigRequest
* The request to get an origin access identity's configuration.
* @return Result of the GetCloudFrontOriginAccessIdentityConfig operation
* returned by the service.
* @throws NoSuchCloudFrontOriginAccessIdentityException
* The specified origin access identity does not exist.
* @throws AccessDeniedException
* Access denied.
* @sample AmazonCloudFront.GetCloudFrontOriginAccessIdentityConfig
*/
GetCloudFrontOriginAccessIdentityConfigResult getCloudFrontOriginAccessIdentityConfig(
GetCloudFrontOriginAccessIdentityConfigRequest getCloudFrontOriginAccessIdentityConfigRequest);
/**
* Get the information about a distribution.
*
* @param getDistributionRequest
* The request to get a distribution's information.
* @return Result of the GetDistribution operation returned by the service.
* @throws NoSuchDistributionException
* The specified distribution does not exist.
* @throws AccessDeniedException
* Access denied.
* @sample AmazonCloudFront.GetDistribution
*/
GetDistributionResult getDistribution(
GetDistributionRequest getDistributionRequest);
/**
* Get the configuration information about a distribution.
*
* @param getDistributionConfigRequest
* The request to get a distribution configuration.
* @return Result of the GetDistributionConfig operation returned by the
* service.
* @throws NoSuchDistributionException
* The specified distribution does not exist.
* @throws AccessDeniedException
* Access denied.
* @sample AmazonCloudFront.GetDistributionConfig
*/
GetDistributionConfigResult getDistributionConfig(
GetDistributionConfigRequest getDistributionConfigRequest);
/**
* Get the information about an invalidation.
*
* @param getInvalidationRequest
* The request to get an invalidation's information.
* @return Result of the GetInvalidation operation returned by the service.
* @throws NoSuchInvalidationException
* The specified invalidation does not exist.
* @throws NoSuchDistributionException
* The specified distribution does not exist.
* @throws AccessDeniedException
* Access denied.
* @sample AmazonCloudFront.GetInvalidation
*/
GetInvalidationResult getInvalidation(
GetInvalidationRequest getInvalidationRequest);
/**
* Get the information about a streaming distribution.
*
* @param getStreamingDistributionRequest
* The request to get a streaming distribution's information.
* @return Result of the GetStreamingDistribution operation returned by the
* service.
* @throws NoSuchStreamingDistributionException
* The specified streaming distribution does not exist.
* @throws AccessDeniedException
* Access denied.
* @sample AmazonCloudFront.GetStreamingDistribution
*/
GetStreamingDistributionResult getStreamingDistribution(
GetStreamingDistributionRequest getStreamingDistributionRequest);
/**
* Get the configuration information about a streaming distribution.
*
* @param getStreamingDistributionConfigRequest
* To request to get a streaming distribution configuration.
* @return Result of the GetStreamingDistributionConfig operation returned
* by the service.
* @throws NoSuchStreamingDistributionException
* The specified streaming distribution does not exist.
* @throws AccessDeniedException
* Access denied.
* @sample AmazonCloudFront.GetStreamingDistributionConfig
*/
GetStreamingDistributionConfigResult getStreamingDistributionConfig(
GetStreamingDistributionConfigRequest getStreamingDistributionConfigRequest);
/**
* List origin access identities.
*
* @param listCloudFrontOriginAccessIdentitiesRequest
* The request to list origin access identities.
* @return Result of the ListCloudFrontOriginAccessIdentities operation
* returned by the service.
* @throws InvalidArgumentException
* The argument is invalid.
* @sample AmazonCloudFront.ListCloudFrontOriginAccessIdentities
*/
ListCloudFrontOriginAccessIdentitiesResult listCloudFrontOriginAccessIdentities(
ListCloudFrontOriginAccessIdentitiesRequest listCloudFrontOriginAccessIdentitiesRequest);
/**
* List distributions.
*
* @param listDistributionsRequest
* The request to list your distributions.
* @return Result of the ListDistributions operation returned by the
* service.
* @throws InvalidArgumentException
* The argument is invalid.
* @sample AmazonCloudFront.ListDistributions
*/
ListDistributionsResult listDistributions(
ListDistributionsRequest listDistributionsRequest);
/**
* List the distributions that are associated with a specified AWS WAF web
* ACL.
*
* @param listDistributionsByWebACLIdRequest
* The request to list distributions that are associated with a
* specified AWS WAF web ACL.
* @return Result of the ListDistributionsByWebACLId operation returned by
* the service.
* @throws InvalidArgumentException
* The argument is invalid.
* @throws InvalidWebACLIdException
* @sample AmazonCloudFront.ListDistributionsByWebACLId
*/
ListDistributionsByWebACLIdResult listDistributionsByWebACLId(
ListDistributionsByWebACLIdRequest listDistributionsByWebACLIdRequest);
/**
* List invalidation batches.
*
* @param listInvalidationsRequest
* The request to list invalidations.
* @return Result of the ListInvalidations operation returned by the
* service.
* @throws InvalidArgumentException
* The argument is invalid.
* @throws NoSuchDistributionException
* The specified distribution does not exist.
* @throws AccessDeniedException
* Access denied.
* @sample AmazonCloudFront.ListInvalidations
*/
ListInvalidationsResult listInvalidations(
ListInvalidationsRequest listInvalidationsRequest);
/**
* List streaming distributions.
*
* @param listStreamingDistributionsRequest
* The request to list your streaming distributions.
* @return Result of the ListStreamingDistributions operation returned by
* the service.
* @throws InvalidArgumentException
* The argument is invalid.
* @sample AmazonCloudFront.ListStreamingDistributions
*/
ListStreamingDistributionsResult listStreamingDistributions(
ListStreamingDistributionsRequest listStreamingDistributionsRequest);
/**
* Update an origin access identity.
*
* @param updateCloudFrontOriginAccessIdentityRequest
* The request to update an origin access identity.
* @return Result of the UpdateCloudFrontOriginAccessIdentity operation
* returned by the service.
* @throws AccessDeniedException
* Access denied.
* @throws IllegalUpdateException
* Origin and CallerReference cannot be updated.
* @throws InvalidIfMatchVersionException
* The If-Match version is missing or not valid for the
* distribution.
* @throws MissingBodyException
* This operation requires a body. Ensure that the body is present
* and the Content-Type header is set.
* @throws NoSuchCloudFrontOriginAccessIdentityException
* The specified origin access identity does not exist.
* @throws PreconditionFailedException
* The precondition given in one or more of the request-header
* fields evaluated to false.
* @throws InvalidArgumentException
* The argument is invalid.
* @throws InconsistentQuantitiesException
* The value of Quantity and the size of Items do not match.
* @sample AmazonCloudFront.UpdateCloudFrontOriginAccessIdentity
*/
UpdateCloudFrontOriginAccessIdentityResult updateCloudFrontOriginAccessIdentity(
UpdateCloudFrontOriginAccessIdentityRequest updateCloudFrontOriginAccessIdentityRequest);
/**
* Update a distribution.
*
* @param updateDistributionRequest
* The request to update a distribution.
* @return Result of the UpdateDistribution operation returned by the
* service.
* @throws AccessDeniedException
* Access denied.
* @throws CNAMEAlreadyExistsException
* @throws IllegalUpdateException
* Origin and CallerReference cannot be updated.
* @throws InvalidIfMatchVersionException
* The If-Match version is missing or not valid for the
* distribution.
* @throws MissingBodyException
* This operation requires a body. Ensure that the body is present
* and the Content-Type header is set.
* @throws NoSuchDistributionException
* The specified distribution does not exist.
* @throws PreconditionFailedException
* The precondition given in one or more of the request-header
* fields evaluated to false.
* @throws TooManyDistributionCNAMEsException
* Your request contains more CNAMEs than are allowed per
* distribution.
* @throws InvalidDefaultRootObjectException
* The default root object file name is too big or contains an
* invalid character.
* @throws InvalidRelativePathException
* The relative path is too big, is not URL-encoded, or does not
* begin with a slash (/).
* @throws InvalidErrorCodeException
* @throws InvalidResponseCodeException
* @throws InvalidArgumentException
* The argument is invalid.
* @throws InvalidOriginAccessIdentityException
* The origin access identity is not valid or doesn't exist.
* @throws TooManyTrustedSignersException
* Your request contains more trusted signers than are allowed per
* distribution.
* @throws TrustedSignerDoesNotExistException
* One or more of your trusted signers do not exist.
* @throws InvalidViewerCertificateException
* @throws InvalidMinimumProtocolVersionException
* @throws InvalidRequiredProtocolException
* This operation requires the HTTPS protocol. Ensure that you
* specify the HTTPS protocol in your request, or omit the
* RequiredProtocols element from your distribution configuration.
* @throws NoSuchOriginException
* No origin exists with the specified Origin Id.
* @throws TooManyOriginsException
* You cannot create anymore origins for the distribution.
* @throws TooManyCacheBehaviorsException
* You cannot create anymore cache behaviors for the distribution.
* @throws TooManyCookieNamesInWhiteListException
* Your request contains more cookie names in the whitelist than are
* allowed per cache behavior.
* @throws InvalidForwardCookiesException
* Your request contains forward cookies option which doesn't match
* with the expectation for the whitelisted list of cookie names.
* Either list of cookie names has been specified when not allowed
* or list of cookie names is missing when expected.
* @throws TooManyHeadersInForwardedValuesException
* @throws InvalidHeadersForS3OriginException
* @throws InconsistentQuantitiesException
* The value of Quantity and the size of Items do not match.
* @throws TooManyCertificatesException
* You cannot create anymore custom ssl certificates.
* @throws InvalidLocationCodeException
* @throws InvalidGeoRestrictionParameterException
* @throws InvalidTTLOrderException
* @throws InvalidWebACLIdException
* @throws TooManyOriginCustomHeadersException
* @sample AmazonCloudFront.UpdateDistribution
*/
UpdateDistributionResult updateDistribution(
UpdateDistributionRequest updateDistributionRequest);
/**
* Update a streaming distribution.
*
* @param updateStreamingDistributionRequest
* The request to update a streaming distribution.
* @return Result of the UpdateStreamingDistribution operation returned by
* the service.
* @throws AccessDeniedException
* Access denied.
* @throws CNAMEAlreadyExistsException
* @throws IllegalUpdateException
* Origin and CallerReference cannot be updated.
* @throws InvalidIfMatchVersionException
* The If-Match version is missing or not valid for the
* distribution.
* @throws MissingBodyException
* This operation requires a body. Ensure that the body is present
* and the Content-Type header is set.
* @throws NoSuchStreamingDistributionException
* The specified streaming distribution does not exist.
* @throws PreconditionFailedException
* The precondition given in one or more of the request-header
* fields evaluated to false.
* @throws TooManyStreamingDistributionCNAMEsException
* @throws InvalidArgumentException
* The argument is invalid.
* @throws InvalidOriginAccessIdentityException
* The origin access identity is not valid or doesn't exist.
* @throws TooManyTrustedSignersException
* Your request contains more trusted signers than are allowed per
* distribution.
* @throws TrustedSignerDoesNotExistException
* One or more of your trusted signers do not exist.
* @throws InconsistentQuantitiesException
* The value of Quantity and the size of Items do not match.
* @sample AmazonCloudFront.UpdateStreamingDistribution
*/
UpdateStreamingDistributionResult updateStreamingDistribution(
UpdateStreamingDistributionRequest updateStreamingDistributionRequest);
/**
* 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.
*/
void shutdown();
/**
* 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.
*
* @param request
* The originally executed request.
*
* @return The response metadata for the specified request, or null if none
* is available.
*/
ResponseMetadata getCachedResponseMetadata(AmazonWebServiceRequest request);
}