/
api_op_BatchWriteItem.go
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/
api_op_BatchWriteItem.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package dynamodb
import (
"context"
"fmt"
awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
"github.com/aws/aws-sdk-go-v2/service/dynamodb/types"
internalEndpointDiscovery "github.com/aws/aws-sdk-go-v2/service/internal/endpoint-discovery"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
)
// The BatchWriteItem operation puts or deletes multiple items in one or more
// tables. A single call to BatchWriteItem can transmit up to 16MB of data over
// the network, consisting of up to 25 item put or delete operations. While
// individual items can be up to 400 KB once stored, it's important to note that an
// item's representation might be greater than 400KB while being sent in DynamoDB's
// JSON format for the API call. For more details on this distinction, see [Naming Rules and Data Types].
//
// BatchWriteItem cannot update items. If you perform a BatchWriteItem operation
// on an existing item, that item's values will be overwritten by the operation and
// it will appear like it was updated. To update items, we recommend you use the
// UpdateItem action.
//
// The individual PutItem and DeleteItem operations specified in BatchWriteItem
// are atomic; however BatchWriteItem as a whole is not. If any requested
// operations fail because the table's provisioned throughput is exceeded or an
// internal processing failure occurs, the failed operations are returned in the
// UnprocessedItems response parameter. You can investigate and optionally resend
// the requests. Typically, you would call BatchWriteItem in a loop. Each
// iteration would check for unprocessed items and submit a new BatchWriteItem
// request with those unprocessed items until all items have been processed.
//
// If none of the items can be processed due to insufficient provisioned
// throughput on all of the tables in the request, then BatchWriteItem returns a
// ProvisionedThroughputExceededException .
//
// If DynamoDB returns any unprocessed items, you should retry the batch operation
// on those items. However, we strongly recommend that you use an exponential
// backoff algorithm. If you retry the batch operation immediately, the underlying
// read or write requests can still fail due to throttling on the individual
// tables. If you delay the batch operation using exponential backoff, the
// individual requests in the batch are much more likely to succeed.
//
// For more information, see [Batch Operations and Error Handling] in the Amazon DynamoDB Developer Guide.
//
// With BatchWriteItem , you can efficiently write or delete large amounts of data,
// such as from Amazon EMR, or copy data from another database into DynamoDB. In
// order to improve performance with these large-scale operations, BatchWriteItem
// does not behave in the same way as individual PutItem and DeleteItem calls
// would. For example, you cannot specify conditions on individual put and delete
// requests, and BatchWriteItem does not return deleted items in the response.
//
// If you use a programming language that supports concurrency, you can use
// threads to write items in parallel. Your application must include the necessary
// logic to manage the threads. With languages that don't support threading, you
// must update or delete the specified items one at a time. In both situations,
// BatchWriteItem performs the specified put and delete operations in parallel,
// giving you the power of the thread pool approach without having to introduce
// complexity into your application.
//
// Parallel processing reduces latency, but each specified put and delete request
// consumes the same number of write capacity units whether it is processed in
// parallel or not. Delete operations on nonexistent items consume one write
// capacity unit.
//
// If one or more of the following is true, DynamoDB rejects the entire batch
// write operation:
//
// - One or more tables specified in the BatchWriteItem request does not exist.
//
// - Primary key attributes specified on an item in the request do not match
// those in the corresponding table's primary key schema.
//
// - You try to perform multiple operations on the same item in the same
// BatchWriteItem request. For example, you cannot put and delete the same item
// in the same BatchWriteItem request.
//
// - Your request contains at least two items with identical hash and range keys
// (which essentially is two put operations).
//
// - There are more than 25 requests in the batch.
//
// - Any individual item in a batch exceeds 400 KB.
//
// - The total request size exceeds 16 MB.
//
// [Batch Operations and Error Handling]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ErrorHandling.html#Programming.Errors.BatchOperations
// [Naming Rules and Data Types]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.NamingRulesDataTypes.html
func (c *Client) BatchWriteItem(ctx context.Context, params *BatchWriteItemInput, optFns ...func(*Options)) (*BatchWriteItemOutput, error) {
if params == nil {
params = &BatchWriteItemInput{}
}
result, metadata, err := c.invokeOperation(ctx, "BatchWriteItem", params, optFns, c.addOperationBatchWriteItemMiddlewares)
if err != nil {
return nil, err
}
out := result.(*BatchWriteItemOutput)
out.ResultMetadata = metadata
return out, nil
}
// Represents the input of a BatchWriteItem operation.
type BatchWriteItemInput struct {
// A map of one or more table names or table ARNs and, for each table, a list of
// operations to be performed ( DeleteRequest or PutRequest ). Each element in the
// map consists of the following:
//
// - DeleteRequest - Perform a DeleteItem operation on the specified item. The
// item to be deleted is identified by a Key subelement:
//
// - Key - A map of primary key attribute values that uniquely identify the item.
// Each entry in this map consists of an attribute name and an attribute value. For
// each primary key, you must provide all of the key attributes. For example, with
// a simple primary key, you only need to provide a value for the partition key.
// For a composite primary key, you must provide values for both the partition key
// and the sort key.
//
// - PutRequest - Perform a PutItem operation on the specified item. The item to
// be put is identified by an Item subelement:
//
// - Item - A map of attributes and their values. Each entry in this map consists
// of an attribute name and an attribute value. Attribute values must not be null;
// string and binary type attributes must have lengths greater than zero; and set
// type attributes must not be empty. Requests that contain empty values are
// rejected with a ValidationException exception.
//
// If you specify any attributes that are part of an index key, then the data
// types for those attributes must match those of the schema in the table's
// attribute definition.
//
// This member is required.
RequestItems map[string][]types.WriteRequest
// Determines the level of detail about either provisioned or on-demand throughput
// consumption that is returned in the response:
//
// - INDEXES - The response includes the aggregate ConsumedCapacity for the
// operation, together with ConsumedCapacity for each table and secondary index
// that was accessed.
//
// Note that some operations, such as GetItem and BatchGetItem , do not access any
// indexes at all. In these cases, specifying INDEXES will only return
// ConsumedCapacity information for table(s).
//
// - TOTAL - The response includes only the aggregate ConsumedCapacity for the
// operation.
//
// - NONE - No ConsumedCapacity details are included in the response.
ReturnConsumedCapacity types.ReturnConsumedCapacity
// Determines whether item collection metrics are returned. If set to SIZE , the
// response includes statistics about item collections, if any, that were modified
// during the operation are returned in the response. If set to NONE (the
// default), no statistics are returned.
ReturnItemCollectionMetrics types.ReturnItemCollectionMetrics
noSmithyDocumentSerde
}
// Represents the output of a BatchWriteItem operation.
type BatchWriteItemOutput struct {
// The capacity units consumed by the entire BatchWriteItem operation.
//
// Each element consists of:
//
// - TableName - The table that consumed the provisioned throughput.
//
// - CapacityUnits - The total number of capacity units consumed.
ConsumedCapacity []types.ConsumedCapacity
// A list of tables that were processed by BatchWriteItem and, for each table,
// information about any item collections that were affected by individual
// DeleteItem or PutItem operations.
//
// Each entry consists of the following subelements:
//
// - ItemCollectionKey - The partition key value of the item collection. This is
// the same as the partition key value of the item.
//
// - SizeEstimateRangeGB - An estimate of item collection size, expressed in GB.
// This is a two-element array containing a lower bound and an upper bound for the
// estimate. The estimate includes the size of all the items in the table, plus the
// size of all attributes projected into all of the local secondary indexes on the
// table. Use this estimate to measure whether a local secondary index is
// approaching its size limit.
//
// The estimate is subject to change over time; therefore, do not rely on the
// precision or accuracy of the estimate.
ItemCollectionMetrics map[string][]types.ItemCollectionMetrics
// A map of tables and requests against those tables that were not processed. The
// UnprocessedItems value is in the same form as RequestItems , so you can provide
// this value directly to a subsequent BatchWriteItem operation. For more
// information, see RequestItems in the Request Parameters section.
//
// Each UnprocessedItems entry consists of a table name or table ARN and, for that
// table, a list of operations to perform ( DeleteRequest or PutRequest ).
//
// - DeleteRequest - Perform a DeleteItem operation on the specified item. The
// item to be deleted is identified by a Key subelement:
//
// - Key - A map of primary key attribute values that uniquely identify the item.
// Each entry in this map consists of an attribute name and an attribute value.
//
// - PutRequest - Perform a PutItem operation on the specified item. The item to
// be put is identified by an Item subelement:
//
// - Item - A map of attributes and their values. Each entry in this map consists
// of an attribute name and an attribute value. Attribute values must not be null;
// string and binary type attributes must have lengths greater than zero; and set
// type attributes must not be empty. Requests that contain empty values will be
// rejected with a ValidationException exception.
//
// If you specify any attributes that are part of an index key, then the data
// types for those attributes must match those of the schema in the table's
// attribute definition.
//
// If there are no unprocessed items remaining, the response contains an empty
// UnprocessedItems map.
UnprocessedItems map[string][]types.WriteRequest
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationBatchWriteItemMiddlewares(stack *middleware.Stack, options Options) (err error) {
if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
return err
}
err = stack.Serialize.Add(&awsAwsjson10_serializeOpBatchWriteItem{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpBatchWriteItem{}, middleware.After)
if err != nil {
return err
}
if err := addProtocolFinalizerMiddlewares(stack, options, "BatchWriteItem"); err != nil {
return fmt.Errorf("add protocol finalizers: %v", err)
}
if err = addlegacyEndpointContextSetter(stack, options); err != nil {
return err
}
if err = addSetLoggerMiddleware(stack, options); err != nil {
return err
}
if err = addClientRequestID(stack); err != nil {
return err
}
if err = addComputeContentLength(stack); err != nil {
return err
}
if err = addResolveEndpointMiddleware(stack, options); err != nil {
return err
}
if err = addComputePayloadSHA256(stack); err != nil {
return err
}
if err = addRetry(stack, options); err != nil {
return err
}
if err = addRawResponseToMetadata(stack); err != nil {
return err
}
if err = addRecordResponseTiming(stack); err != nil {
return err
}
if err = addClientUserAgent(stack, options); err != nil {
return err
}
if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = addOpBatchWriteItemDiscoverEndpointMiddleware(stack, options, c); err != nil {
return err
}
if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
return err
}
if err = addOpBatchWriteItemValidationMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opBatchWriteItem(options.Region), middleware.Before); err != nil {
return err
}
if err = addRecursionDetection(stack); err != nil {
return err
}
if err = addRequestIDRetrieverMiddleware(stack); err != nil {
return err
}
if err = addResponseErrorMiddleware(stack); err != nil {
return err
}
if err = addValidateResponseChecksum(stack, options); err != nil {
return err
}
if err = addAcceptEncodingGzip(stack, options); err != nil {
return err
}
if err = addRequestResponseLogging(stack, options); err != nil {
return err
}
if err = addDisableHTTPSMiddleware(stack, options); err != nil {
return err
}
return nil
}
func addOpBatchWriteItemDiscoverEndpointMiddleware(stack *middleware.Stack, o Options, c *Client) error {
return stack.Finalize.Insert(&internalEndpointDiscovery.DiscoverEndpoint{
Options: []func(*internalEndpointDiscovery.DiscoverEndpointOptions){
func(opt *internalEndpointDiscovery.DiscoverEndpointOptions) {
opt.DisableHTTPS = o.EndpointOptions.DisableHTTPS
opt.Logger = o.Logger
},
},
DiscoverOperation: c.fetchOpBatchWriteItemDiscoverEndpoint,
EndpointDiscoveryEnableState: o.EndpointDiscovery.EnableEndpointDiscovery,
EndpointDiscoveryRequired: false,
Region: o.Region,
}, "ResolveEndpointV2", middleware.After)
}
func (c *Client) fetchOpBatchWriteItemDiscoverEndpoint(ctx context.Context, region string, optFns ...func(*internalEndpointDiscovery.DiscoverEndpointOptions)) (internalEndpointDiscovery.WeightedAddress, error) {
input := getOperationInput(ctx)
in, ok := input.(*BatchWriteItemInput)
if !ok {
return internalEndpointDiscovery.WeightedAddress{}, fmt.Errorf("unknown input type %T", input)
}
_ = in
identifierMap := make(map[string]string, 0)
identifierMap["sdk#Region"] = region
key := fmt.Sprintf("DynamoDB.%v", identifierMap)
if v, ok := c.endpointCache.Get(key); ok {
return v, nil
}
discoveryOperationInput := &DescribeEndpointsInput{}
opt := internalEndpointDiscovery.DiscoverEndpointOptions{}
for _, fn := range optFns {
fn(&opt)
}
go c.handleEndpointDiscoveryFromService(ctx, discoveryOperationInput, region, key, opt)
return internalEndpointDiscovery.WeightedAddress{}, nil
}
func newServiceMetadataMiddleware_opBatchWriteItem(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
OperationName: "BatchWriteItem",
}
}