/* * Copyright 2018-2023 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.snowball; import javax.annotation.Generated; import com.amazonaws.services.snowball.model.*; /** * Interface for accessing Amazon Snowball asynchronously. Each asynchronous method will return a Java Future object * representing the asynchronous operation; overloads which accept an {@code AsyncHandler} can be used to receive * notification when an asynchronous operation completes. *
* Note: Do not directly implement this interface, new methods are added to it regularly. Extend from * {@link com.amazonaws.services.snowball.AbstractAmazonSnowballAsync} instead. *
**
* The Amazon Web Services Snow Family provides a petabyte-scale data transport solution that uses secure devices to * transfer large amounts of data between your on-premises data centers and Amazon Simple Storage Service (Amazon S3). * The Snow Family commands described here provide access to the same functionality that is available in the Amazon Web * Services Snow Family Management Console, which enables you to create and manage jobs for a Snow Family device. To * transfer data locally with a Snow Family device, you'll need to use the Snowball Edge client or the Amazon S3 API * Interface for Snowball or OpsHub for Snow Family. For more information, see the User Guide. *
*/ @Generated("com.amazonaws:aws-java-sdk-code-generator") public interface AmazonSnowballAsync extends AmazonSnowball { /** *
* Cancels a cluster job. You can only cancel a cluster job while it's in the AwaitingQuorum
status.
* You'll have at least an hour after creating a cluster job to cancel it.
*
* Cancels a cluster job. You can only cancel a cluster job while it's in the AwaitingQuorum
status.
* You'll have at least an hour after creating a cluster job to cancel it.
*
* Cancels the specified job. You can only cancel a job before its JobState
value changes to
* PreparingAppliance
. Requesting the ListJobs
or DescribeJob
action returns
* a job's JobState
as part of the response element data returned.
*
* Cancels the specified job. You can only cancel a job before its JobState
value changes to
* PreparingAppliance
. Requesting the ListJobs
or DescribeJob
action returns
* a job's JobState
as part of the response element data returned.
*
* Creates an address for a Snow device to be shipped to. In most regions, addresses are validated at the time of * creation. The address you provide must be located within the serviceable area of your region. If the address is * invalid or unsupported, then an exception is thrown. *
* * @param createAddressRequest * @return A Java Future containing the result of the CreateAddress operation returned by the service. * @sample AmazonSnowballAsync.CreateAddress * @see AWS API * Documentation */ java.util.concurrent.Future* Creates an address for a Snow device to be shipped to. In most regions, addresses are validated at the time of * creation. The address you provide must be located within the serviceable area of your region. If the address is * invalid or unsupported, then an exception is thrown. *
* * @param createAddressRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the CreateAddress operation returned by the service. * @sample AmazonSnowballAsyncHandler.CreateAddress * @see AWS API * Documentation */ java.util.concurrent.Future* Creates an empty cluster. Each cluster supports five nodes. You use the CreateJob action separately to * create the jobs for each of these nodes. The cluster does not ship until these five node jobs have been created. *
* * @param createClusterRequest * @return A Java Future containing the result of the CreateCluster operation returned by the service. * @sample AmazonSnowballAsync.CreateCluster * @see AWS API * Documentation */ java.util.concurrent.Future* Creates an empty cluster. Each cluster supports five nodes. You use the CreateJob action separately to * create the jobs for each of these nodes. The cluster does not ship until these five node jobs have been created. *
* * @param createClusterRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the CreateCluster operation returned by the service. * @sample AmazonSnowballAsyncHandler.CreateCluster * @see AWS API * Documentation */ java.util.concurrent.Future
* Creates a job to import or export data between Amazon S3 and your on-premises data center. Your Amazon Web
* Services account must have the right trust policies and permissions in place to create a job for a Snow device.
* If you're creating a job for a node in a cluster, you only need to provide the clusterId
value; the
* other job attributes are inherited from the cluster.
*
* Only the Snowball; Edge device type is supported when ordering clustered jobs. *
** The device capacity is optional. *
** Availability of device types differ by Amazon Web Services Region. For more information about Region * availability, see Amazon * Web Services Regional Services. *
** Snow Family devices and their capacities. *
** Device type: SNC1_SSD *
** Capacity: T14 *
** Description: Snowcone *
** Device type: SNC1_HDD *
** Capacity: T8 *
** Description: Snowcone *
** Device type: EDGE_S *
** Capacity: T98 *
** Description: Snowball Edge Storage Optimized for data transfer only *
** Device type: EDGE_CG *
** Capacity: T42 *
** Description: Snowball Edge Compute Optimized with GPU *
** Device type: EDGE_C *
** Capacity: T42 *
** Description: Snowball Edge Compute Optimized without GPU *
** Device type: EDGE *
** Capacity: T100 *
** Description: Snowball Edge Storage Optimized with EC2 Compute *
** This device is replaced with T98. *
** Device type: STANDARD *
** Capacity: T50 *
** Description: Original Snowball device *
** This device is only available in the Ningxia, Beijing, and Singapore Amazon Web Services Region *
** Device type: STANDARD *
** Capacity: T80 *
** Description: Original Snowball device *
** This device is only available in the Ningxia, Beijing, and Singapore Amazon Web Services Region. *
** Snow Family device type: RACK_5U_C *
** Capacity: T13 *
** Description: Snowblade. *
** Device type: V3_5S *
** Capacity: T240 *
** Description: Snowball Edge Storage Optimized 210TB *
*
* Creates a job to import or export data between Amazon S3 and your on-premises data center. Your Amazon Web
* Services account must have the right trust policies and permissions in place to create a job for a Snow device.
* If you're creating a job for a node in a cluster, you only need to provide the clusterId
value; the
* other job attributes are inherited from the cluster.
*
* Only the Snowball; Edge device type is supported when ordering clustered jobs. *
** The device capacity is optional. *
** Availability of device types differ by Amazon Web Services Region. For more information about Region * availability, see Amazon * Web Services Regional Services. *
** Snow Family devices and their capacities. *
** Device type: SNC1_SSD *
** Capacity: T14 *
** Description: Snowcone *
** Device type: SNC1_HDD *
** Capacity: T8 *
** Description: Snowcone *
** Device type: EDGE_S *
** Capacity: T98 *
** Description: Snowball Edge Storage Optimized for data transfer only *
** Device type: EDGE_CG *
** Capacity: T42 *
** Description: Snowball Edge Compute Optimized with GPU *
** Device type: EDGE_C *
** Capacity: T42 *
** Description: Snowball Edge Compute Optimized without GPU *
** Device type: EDGE *
** Capacity: T100 *
** Description: Snowball Edge Storage Optimized with EC2 Compute *
** This device is replaced with T98. *
** Device type: STANDARD *
** Capacity: T50 *
** Description: Original Snowball device *
** This device is only available in the Ningxia, Beijing, and Singapore Amazon Web Services Region *
** Device type: STANDARD *
** Capacity: T80 *
** Description: Original Snowball device *
** This device is only available in the Ningxia, Beijing, and Singapore Amazon Web Services Region. *
** Snow Family device type: RACK_5U_C *
** Capacity: T13 *
** Description: Snowblade. *
** Device type: V3_5S *
** Capacity: T240 *
** Description: Snowball Edge Storage Optimized 210TB *
** Creates a job with the long-term usage option for a device. The long-term usage is a 1-year or 3-year long-term * pricing type for the device. You are billed upfront, and Amazon Web Services provides discounts for long-term * pricing. *
* * @param createLongTermPricingRequest * @return A Java Future containing the result of the CreateLongTermPricing operation returned by the service. * @sample AmazonSnowballAsync.CreateLongTermPricing * @see AWS * API Documentation */ java.util.concurrent.Future* Creates a job with the long-term usage option for a device. The long-term usage is a 1-year or 3-year long-term * pricing type for the device. You are billed upfront, and Amazon Web Services provides discounts for long-term * pricing. *
* * @param createLongTermPricingRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the CreateLongTermPricing operation returned by the service. * @sample AmazonSnowballAsyncHandler.CreateLongTermPricing * @see AWS * API Documentation */ java.util.concurrent.Future* Creates a shipping label that will be used to return the Snow device to Amazon Web Services. *
* * @param createReturnShippingLabelRequest * @return A Java Future containing the result of the CreateReturnShippingLabel operation returned by the service. * @sample AmazonSnowballAsync.CreateReturnShippingLabel * @see AWS API Documentation */ java.util.concurrent.Future* Creates a shipping label that will be used to return the Snow device to Amazon Web Services. *
* * @param createReturnShippingLabelRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the CreateReturnShippingLabel operation returned by the service. * @sample AmazonSnowballAsyncHandler.CreateReturnShippingLabel * @see AWS API Documentation */ java.util.concurrent.Future
* Takes an AddressId
and returns specific details about that address in the form of an
* Address
object.
*
* Takes an AddressId
and returns specific details about that address in the form of an
* Address
object.
*
* Returns a specified number of ADDRESS
objects. Calling this API in one of the US regions will return
* addresses from the list of all addresses associated with this account in all US regions.
*
* Returns a specified number of ADDRESS
objects. Calling this API in one of the US regions will return
* addresses from the list of all addresses associated with this account in all US regions.
*
* Returns information about a specific cluster including shipping information, cluster status, and other important * metadata. *
* * @param describeClusterRequest * @return A Java Future containing the result of the DescribeCluster operation returned by the service. * @sample AmazonSnowballAsync.DescribeCluster * @see AWS API * Documentation */ java.util.concurrent.Future* Returns information about a specific cluster including shipping information, cluster status, and other important * metadata. *
* * @param describeClusterRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the DescribeCluster operation returned by the service. * @sample AmazonSnowballAsyncHandler.DescribeCluster * @see AWS API * Documentation */ java.util.concurrent.Future* Returns information about a specific job including shipping information, job status, and other important * metadata. *
* * @param describeJobRequest * @return A Java Future containing the result of the DescribeJob operation returned by the service. * @sample AmazonSnowballAsync.DescribeJob * @see AWS API * Documentation */ java.util.concurrent.Future* Returns information about a specific job including shipping information, job status, and other important * metadata. *
* * @param describeJobRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the DescribeJob operation returned by the service. * @sample AmazonSnowballAsyncHandler.DescribeJob * @see AWS API * Documentation */ java.util.concurrent.Future* Information on the shipping label of a Snow device that is being returned to Amazon Web Services. *
* * @param describeReturnShippingLabelRequest * @return A Java Future containing the result of the DescribeReturnShippingLabel operation returned by the service. * @sample AmazonSnowballAsync.DescribeReturnShippingLabel * @see AWS API Documentation */ java.util.concurrent.Future* Information on the shipping label of a Snow device that is being returned to Amazon Web Services. *
* * @param describeReturnShippingLabelRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the DescribeReturnShippingLabel operation returned by the service. * @sample AmazonSnowballAsyncHandler.DescribeReturnShippingLabel * @see AWS API Documentation */ java.util.concurrent.Future
* Returns a link to an Amazon S3 presigned URL for the manifest file associated with the specified
* JobId
value. You can access the manifest file for up to 60 minutes after this request has been made.
* To access the manifest file after 60 minutes have passed, you'll have to make another call to the
* GetJobManifest
action.
*
* The manifest is an encrypted file that you can download after your job enters the WithCustomer
* status. This is the only valid status for calling this API as the manifest and UnlockCode
code value
* are used for securing your device and should only be used when you have the device. The manifest is decrypted by
* using the UnlockCode
code value, when you pass both values to the Snow device through the Snowball
* client when the client is started for the first time.
*
* As a best practice, we recommend that you don't save a copy of an UnlockCode
value in the same
* location as the manifest file for that job. Saving these separately helps prevent unauthorized parties from
* gaining access to the Snow device associated with that job.
*
* The credentials of a given job, including its manifest file and unlock code, expire 360 days after the job is * created. *
* * @param getJobManifestRequest * @return A Java Future containing the result of the GetJobManifest operation returned by the service. * @sample AmazonSnowballAsync.GetJobManifest * @see AWS API * Documentation */ java.util.concurrent.Future
* Returns a link to an Amazon S3 presigned URL for the manifest file associated with the specified
* JobId
value. You can access the manifest file for up to 60 minutes after this request has been made.
* To access the manifest file after 60 minutes have passed, you'll have to make another call to the
* GetJobManifest
action.
*
* The manifest is an encrypted file that you can download after your job enters the WithCustomer
* status. This is the only valid status for calling this API as the manifest and UnlockCode
code value
* are used for securing your device and should only be used when you have the device. The manifest is decrypted by
* using the UnlockCode
code value, when you pass both values to the Snow device through the Snowball
* client when the client is started for the first time.
*
* As a best practice, we recommend that you don't save a copy of an UnlockCode
value in the same
* location as the manifest file for that job. Saving these separately helps prevent unauthorized parties from
* gaining access to the Snow device associated with that job.
*
* The credentials of a given job, including its manifest file and unlock code, expire 360 days after the job is * created. *
* * @param getJobManifestRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the GetJobManifest operation returned by the service. * @sample AmazonSnowballAsyncHandler.GetJobManifest * @see AWS API * Documentation */ java.util.concurrent.Future
* Returns the UnlockCode
code value for the specified job. A particular UnlockCode
value
* can be accessed for up to 360 days after the associated job has been created.
*
* The UnlockCode
value is a 29-character code with 25 alphanumeric characters and 4 hyphens. This code
* is used to decrypt the manifest file when it is passed along with the manifest to the Snow device through the
* Snowball client when the client is started for the first time. The only valid status for calling this API is
* WithCustomer
as the manifest and Unlock
code values are used for securing your device
* and should only be used when you have the device.
*
* As a best practice, we recommend that you don't save a copy of the UnlockCode
in the same location
* as the manifest file for that job. Saving these separately helps prevent unauthorized parties from gaining access
* to the Snow device associated with that job.
*
* Returns the UnlockCode
code value for the specified job. A particular UnlockCode
value
* can be accessed for up to 360 days after the associated job has been created.
*
* The UnlockCode
value is a 29-character code with 25 alphanumeric characters and 4 hyphens. This code
* is used to decrypt the manifest file when it is passed along with the manifest to the Snow device through the
* Snowball client when the client is started for the first time. The only valid status for calling this API is
* WithCustomer
as the manifest and Unlock
code values are used for securing your device
* and should only be used when you have the device.
*
* As a best practice, we recommend that you don't save a copy of the UnlockCode
in the same location
* as the manifest file for that job. Saving these separately helps prevent unauthorized parties from gaining access
* to the Snow device associated with that job.
*
* Returns information about the Snow Family service limit for your account, and also the number of Snow devices * your account has in use. *
** The default service limit for the number of Snow devices that you can have at one time is 1. If you want to * increase your service limit, contact Amazon Web Services Support. *
* * @param getSnowballUsageRequest * @return A Java Future containing the result of the GetSnowballUsage operation returned by the service. * @sample AmazonSnowballAsync.GetSnowballUsage * @see AWS API * Documentation */ java.util.concurrent.Future* Returns information about the Snow Family service limit for your account, and also the number of Snow devices * your account has in use. *
** The default service limit for the number of Snow devices that you can have at one time is 1. If you want to * increase your service limit, contact Amazon Web Services Support. *
* * @param getSnowballUsageRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the GetSnowballUsage operation returned by the service. * @sample AmazonSnowballAsyncHandler.GetSnowballUsage * @see AWS API * Documentation */ java.util.concurrent.Future
* Returns an Amazon S3 presigned URL for an update file associated with a specified JobId
.
*
* Returns an Amazon S3 presigned URL for an update file associated with a specified JobId
.
*
* Returns an array of JobListEntry
objects of the specified length. Each JobListEntry
* object is for a job in the specified cluster and contains a job's state, a job's ID, and other information.
*
* Returns an array of JobListEntry
objects of the specified length. Each JobListEntry
* object is for a job in the specified cluster and contains a job's state, a job's ID, and other information.
*
* Returns an array of ClusterListEntry
objects of the specified length. Each
* ClusterListEntry
object contains a cluster's state, a cluster's ID, and other important status
* information.
*
* Returns an array of ClusterListEntry
objects of the specified length. Each
* ClusterListEntry
object contains a cluster's state, a cluster's ID, and other important status
* information.
*
* This action returns a list of the different Amazon EC2-compatible Amazon Machine Images (AMIs) that are owned by * your Amazon Web Services accountthat would be supported for use on a Snow device. Currently, supported AMIs are * based on the Amazon Linux-2, Ubuntu 20.04 LTS - Focal, or Ubuntu 22.04 LTS - Jammy images, available on the * Amazon Web Services Marketplace. Ubuntu 16.04 LTS - Xenial (HVM) images are no longer supported in the Market, * but still supported for use on devices through Amazon EC2 VM Import/Export and running locally in AMIs. *
* * @param listCompatibleImagesRequest * @return A Java Future containing the result of the ListCompatibleImages operation returned by the service. * @sample AmazonSnowballAsync.ListCompatibleImages * @see AWS * API Documentation */ java.util.concurrent.Future* This action returns a list of the different Amazon EC2-compatible Amazon Machine Images (AMIs) that are owned by * your Amazon Web Services accountthat would be supported for use on a Snow device. Currently, supported AMIs are * based on the Amazon Linux-2, Ubuntu 20.04 LTS - Focal, or Ubuntu 22.04 LTS - Jammy images, available on the * Amazon Web Services Marketplace. Ubuntu 16.04 LTS - Xenial (HVM) images are no longer supported in the Market, * but still supported for use on devices through Amazon EC2 VM Import/Export and running locally in AMIs. *
* * @param listCompatibleImagesRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the ListCompatibleImages operation returned by the service. * @sample AmazonSnowballAsyncHandler.ListCompatibleImages * @see AWS * API Documentation */ java.util.concurrent.Future
* Returns an array of JobListEntry
objects of the specified length. Each JobListEntry
* object contains a job's state, a job's ID, and a value that indicates whether the job is a job part, in the case
* of export jobs. Calling this API action in one of the US regions will return jobs from the list of all jobs
* associated with this account in all US regions.
*
* Returns an array of JobListEntry
objects of the specified length. Each JobListEntry
* object contains a job's state, a job's ID, and a value that indicates whether the job is a job part, in the case
* of export jobs. Calling this API action in one of the US regions will return jobs from the list of all jobs
* associated with this account in all US regions.
*
* Lists all long-term pricing types. *
* * @param listLongTermPricingRequest * @return A Java Future containing the result of the ListLongTermPricing operation returned by the service. * @sample AmazonSnowballAsync.ListLongTermPricing * @see AWS * API Documentation */ java.util.concurrent.Future* Lists all long-term pricing types. *
* * @param listLongTermPricingRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the ListLongTermPricing operation returned by the service. * @sample AmazonSnowballAsyncHandler.ListLongTermPricing * @see AWS * API Documentation */ java.util.concurrent.Future* A list of locations from which the customer can choose to pickup a device. *
* * @param listPickupLocationsRequest * @return A Java Future containing the result of the ListPickupLocations operation returned by the service. * @sample AmazonSnowballAsync.ListPickupLocations * @see AWS * API Documentation */ java.util.concurrent.Future* A list of locations from which the customer can choose to pickup a device. *
* * @param listPickupLocationsRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the ListPickupLocations operation returned by the service. * @sample AmazonSnowballAsyncHandler.ListPickupLocations * @see AWS * API Documentation */ java.util.concurrent.Future
* Lists all supported versions for Snow on-device services. Returns an array of ServiceVersion
object
* containing the supported versions for a particular service.
*
* Lists all supported versions for Snow on-device services. Returns an array of ServiceVersion
object
* containing the supported versions for a particular service.
*
* While a cluster's ClusterState
value is in the AwaitingQuorum
state, you can update
* some of the information associated with a cluster. Once the cluster changes to a different job state, usually 60
* minutes after the cluster being created, this action is no longer available.
*
* While a cluster's ClusterState
value is in the AwaitingQuorum
state, you can update
* some of the information associated with a cluster. Once the cluster changes to a different job state, usually 60
* minutes after the cluster being created, this action is no longer available.
*
* While a job's JobState
value is New
, you can update some of the information associated
* with a job. Once the job changes to a different job state, usually within 60 minutes of the job being created,
* this action is no longer available.
*
* While a job's JobState
value is New
, you can update some of the information associated
* with a job. Once the job changes to a different job state, usually within 60 minutes of the job being created,
* this action is no longer available.
*
* Updates the state when a shipment state changes to a different state. *
* * @param updateJobShipmentStateRequest * @return A Java Future containing the result of the UpdateJobShipmentState operation returned by the service. * @sample AmazonSnowballAsync.UpdateJobShipmentState * @see AWS API Documentation */ java.util.concurrent.Future* Updates the state when a shipment state changes to a different state. *
* * @param updateJobShipmentStateRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the UpdateJobShipmentState operation returned by the service. * @sample AmazonSnowballAsyncHandler.UpdateJobShipmentState * @see AWS API Documentation */ java.util.concurrent.Future* Updates the long-term pricing type. *
* * @param updateLongTermPricingRequest * @return A Java Future containing the result of the UpdateLongTermPricing operation returned by the service. * @sample AmazonSnowballAsync.UpdateLongTermPricing * @see AWS * API Documentation */ java.util.concurrent.Future* Updates the long-term pricing type. *
* * @param updateLongTermPricingRequest * @param asyncHandler * Asynchronous callback handler for events in the lifecycle of the request. Users can provide an * implementation of the callback methods in this interface to receive notification of successful or * unsuccessful completion of the operation. * @return A Java Future containing the result of the UpdateLongTermPricing operation returned by the service. * @sample AmazonSnowballAsyncHandler.UpdateLongTermPricing * @see AWS * API Documentation */ java.util.concurrent.Future