com.amazonaws.services.dynamodbv2.model

Class BatchWriteItemRequest

java.lang.Object

com.amazonaws.AmazonWebServiceRequest

com.amazonaws.services.dynamodbv2.model.BatchWriteItemRequest

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class BatchWriteItemRequest
extends AmazonWebServiceRequest
implements java.io.Serializable

The BatchWriteItem operation puts or deletes multiple items in one or more tables. A single call to BatchWriteItem can write up to 16 MB of data, which can comprise as many as 25 put or delete requests. Individual items to be written can be as large as 400 KB.

BatchWriteItem cannot update items. To update items, 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.

Note that if none of the items can be processed due to insufficient provisioned throughput on all of the tables in the request, then BatchWriteItem will return 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 Elastic MapReduce (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.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BatchWriteItemRequest() Default constructor for BatchWriteItemRequest object.
BatchWriteItemRequest(java.util.Map<java.lang.String,java.util.List<WriteRequest>> requestItems) Constructs a new BatchWriteItemRequest object.

Method Summary

Modifier and Type	Method and Description
BatchWriteItemRequest	addRequestItemsEntry(java.lang.String key, java.util.List<WriteRequest> value) A map of one or more table names and, for each table, a list of operations to be performed (DeleteRequest or PutRequest).
BatchWriteItemRequest	clearRequestItemsEntries() Removes all the entries added into RequestItems.
boolean	equals(java.lang.Object obj)
java.util.Map<java.lang.String,java.util.List<WriteRequest>>	getRequestItems() A map of one or more table names and, for each table, a list of operations to be performed (DeleteRequest or PutRequest).
java.lang.String	getReturnConsumedCapacity() Determines the level of detail about provisioned throughput consumption that is returned in the response:
java.lang.String	getReturnItemCollectionMetrics() Determines whether item collection metrics are returned.
int	hashCode()
void	setRequestItems(java.util.Map<java.lang.String,java.util.List<WriteRequest>> requestItems) A map of one or more table names and, for each table, a list of operations to be performed (DeleteRequest or PutRequest).
void	setReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity) Determines the level of detail about provisioned throughput consumption that is returned in the response:
void	setReturnConsumedCapacity(java.lang.String returnConsumedCapacity) Determines the level of detail about provisioned throughput consumption that is returned in the response:
void	setReturnItemCollectionMetrics(ReturnItemCollectionMetrics returnItemCollectionMetrics) Determines whether item collection metrics are returned.
void	setReturnItemCollectionMetrics(java.lang.String returnItemCollectionMetrics) Determines whether item collection metrics are returned.
java.lang.String	toString() Returns a string representation of this object; useful for testing and debugging.
BatchWriteItemRequest	withRequestItems(java.util.Map<java.lang.String,java.util.List<WriteRequest>> requestItems) A map of one or more table names and, for each table, a list of operations to be performed (DeleteRequest or PutRequest).
BatchWriteItemRequest	withReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity) Determines the level of detail about provisioned throughput consumption that is returned in the response:
BatchWriteItemRequest	withReturnConsumedCapacity(java.lang.String returnConsumedCapacity) Determines the level of detail about provisioned throughput consumption that is returned in the response:
BatchWriteItemRequest	withReturnItemCollectionMetrics(ReturnItemCollectionMetrics returnItemCollectionMetrics) Determines whether item collection metrics are returned.
BatchWriteItemRequest	withReturnItemCollectionMetrics(java.lang.String returnItemCollectionMetrics) Determines whether item collection metrics are returned.

Methods inherited from class com.amazonaws.AmazonWebServiceRequest

clone, getCloneRoot, getCloneSource, getGeneralProgressListener, getRequestClientOptions, getRequestCredentials, getRequestMetricCollector, setGeneralProgressListener, setRequestCredentials, setRequestMetricCollector, withGeneralProgressListener, withRequestMetricCollector

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

BatchWriteItemRequest

public BatchWriteItemRequest()

Default constructor for BatchWriteItemRequest object. Callers should use the setter or fluent setter (with...) methods to initialize any additional object members.

BatchWriteItemRequest

public BatchWriteItemRequest(java.util.Map<java.lang.String,java.util.List<WriteRequest>> requestItems)

Constructs a new BatchWriteItemRequest object. Callers should use the setter or fluent setter (with...) methods to initialize any additional object members.

Parameters:

requestItems -

A map of one or more table names 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 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.

Method Detail

getRequestItems

public java.util.Map<java.lang.String,java.util.List<WriteRequest>> getRequestItems()

A map of one or more table names 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 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.

Returns:

A map of one or more table names 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 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.

setRequestItems

public void setRequestItems(java.util.Map<java.lang.String,java.util.List<WriteRequest>> requestItems)

A map of one or more table names 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 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.

Parameters:

requestItems -

A map of one or more table names 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 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.

withRequestItems

public BatchWriteItemRequest withRequestItems(java.util.Map<java.lang.String,java.util.List<WriteRequest>> requestItems)

A map of one or more table names 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 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.

Returns a reference to this object so that method calls can be chained together.

Parameters:

requestItems -

A map of one or more table names 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 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.

Returns:

A reference to this updated object so that method calls can be chained together.

addRequestItemsEntry

public BatchWriteItemRequest addRequestItemsEntry(java.lang.String key,
                                                  java.util.List<WriteRequest> value)

A map of one or more table names 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 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.

The method adds a new key-value pair into RequestItems parameter, and returns a reference to this object so that method calls can be chained together.

Parameters:

key - The key of the entry to be added into RequestItems.

value - The corresponding value of the entry to be added into RequestItems.

Returns:

A reference to this updated object so that method calls can be chained together.

clearRequestItemsEntries

public BatchWriteItemRequest clearRequestItemsEntries()

Removes all the entries added into RequestItems.

Returns a reference to this object so that method calls can be chained together.

getReturnConsumedCapacity

public java.lang.String getReturnConsumedCapacity()

Determines the level of detail about provisioned 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.

Constraints:
Allowed Values: INDEXES, TOTAL, NONE

Returns:

Determines the level of detail about provisioned 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.

See Also:

ReturnConsumedCapacity

setReturnConsumedCapacity

public void setReturnConsumedCapacity(java.lang.String returnConsumedCapacity)

Determines the level of detail about provisioned 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.

Constraints:
Allowed Values: INDEXES, TOTAL, NONE

Parameters:

returnConsumedCapacity -

Determines the level of detail about provisioned 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.

See Also:

ReturnConsumedCapacity

withReturnConsumedCapacity

public BatchWriteItemRequest withReturnConsumedCapacity(java.lang.String returnConsumedCapacity)

Determines the level of detail about provisioned 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.

Returns a reference to this object so that method calls can be chained together.

Constraints:
Allowed Values: INDEXES, TOTAL, NONE

Parameters:

returnConsumedCapacity -

Determines the level of detail about provisioned 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.

Returns:

A reference to this updated object so that method calls can be chained together.

See Also:

ReturnConsumedCapacity

setReturnConsumedCapacity

public void setReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity)

Determines the level of detail about provisioned 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.

Constraints:
Allowed Values: INDEXES, TOTAL, NONE

Parameters:

returnConsumedCapacity -

Determines the level of detail about provisioned 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.

See Also:

ReturnConsumedCapacity

withReturnConsumedCapacity

public BatchWriteItemRequest withReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity)

Determines the level of detail about provisioned 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.

Returns a reference to this object so that method calls can be chained together.

Constraints:
Allowed Values: INDEXES, TOTAL, NONE

Parameters:

returnConsumedCapacity -

Determines the level of detail about provisioned 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.

Returns:

A reference to this updated object so that method calls can be chained together.

See Also:

ReturnConsumedCapacity

getReturnItemCollectionMetrics

public java.lang.String getReturnItemCollectionMetrics()

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.

Constraints:
Allowed Values: SIZE, NONE

Returns:

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.

See Also:

ReturnItemCollectionMetrics

setReturnItemCollectionMetrics

public void setReturnItemCollectionMetrics(java.lang.String returnItemCollectionMetrics)

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.

Constraints:
Allowed Values: SIZE, NONE

Parameters:

returnItemCollectionMetrics -

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.

See Also:

ReturnItemCollectionMetrics

withReturnItemCollectionMetrics

public BatchWriteItemRequest withReturnItemCollectionMetrics(java.lang.String returnItemCollectionMetrics)

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.

Returns a reference to this object so that method calls can be chained together.

Constraints:
Allowed Values: SIZE, NONE

Parameters:

returnItemCollectionMetrics -

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.

Returns:

A reference to this updated object so that method calls can be chained together.

See Also:

ReturnItemCollectionMetrics

setReturnItemCollectionMetrics

public void setReturnItemCollectionMetrics(ReturnItemCollectionMetrics returnItemCollectionMetrics)

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.

Constraints:
Allowed Values: SIZE, NONE

Parameters:

returnItemCollectionMetrics -

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.

See Also:

ReturnItemCollectionMetrics

withReturnItemCollectionMetrics

public BatchWriteItemRequest withReturnItemCollectionMetrics(ReturnItemCollectionMetrics returnItemCollectionMetrics)

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.

Returns a reference to this object so that method calls can be chained together.

Constraints:
Allowed Values: SIZE, NONE

Parameters:

returnItemCollectionMetrics -

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.

Returns:

A reference to this updated object so that method calls can be chained together.

See Also:

ReturnItemCollectionMetrics

toString

public java.lang.String toString()

Returns a string representation of this object; useful for testing and debugging.

Overrides:

toString in class java.lang.Object

Returns:

A string representation of this object.

See Also:

Object.toString()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object