Safe Haskell | None |
---|---|
Language | Haskell2010 |
The BatchPutAttributes operation creates or replaces attributes within one
or more items. By using this operation, the client can perform multiple
PutAttribute operation with a single call. This helps yield savings in
round trips and latencies, enabling Amazon SimpleDB to optimize requests
and generally produce better throughput. The client may specify the item
name with the Item.X.ItemName parameter. The client may specify new
attributes using a combination of the Item.X.Attribute.Y.Name and
Item.X.Attribute.Y.Value parameters. The client may specify the first
attribute for the first item using the parameters Item.0.Attribute.0.Name
and Item.0.Attribute.0.Value, and for the second attribute for the first
item by the parameters Item.0.Attribute.1.Name and
Item.0.Attribute.1.Value, and so on. Attributes are uniquely identified
within an item by their name/value combination. For example, a single item
can have the attributes { "first_name", "first_value" } and { "first_name",
"second_value" }. However, it cannot have two attribute instances where
both the Item.X.Attribute.Y.Name and Item.X.Attribute.Y.Value are the same.
Optionally, the requester can supply the Replace parameter for each
individual value. Setting this value to true will cause the new attribute
values to replace the existing attribute values. For example, if an item I
has the attributes { a
, '1' }, { b
, '2'} and { b
, '3' } and the
requester does a BatchPutAttributes of {I
, b
, '4' } with the Replace
parameter set to true, the final attributes of the item will be { a
, '1'
} and { b
, '4' }, replacing the previous values of the b
attribute with
the new value. This operation is vulnerable to exceeding the maximum URL
size when making a REST request using the HTTP GET method. This operation
does not support conditions using Expected.X.Name, Expected.X.Value, or
Expected.X.Exists. You can execute multiple BatchPutAttributes operations
and other operations in parallel. However, large numbers of concurrent
BatchPutAttributes calls can result in Service Unavailable (503) responses.
The following limitations are enforced for this operation: 256 attribute
name-value pairs per item 1 MB request size 1 billion attributes per domain
10 GB of total user data storage per domain 25 item limit per
BatchPutAttributes operation.
http://docs.aws.amazon.com/AmazonSimpleDB/latest/DeveloperGuide/SDB_API_BatchPutAttributes.html
Request
data BatchPutAttributes Source
Request constructor
BatchPutAttributes
constructor.
The fields accessible through corresponding lenses are:
bpaDomainName
::
Text
bpaItems
::
[ReplaceableItem
]
Request lenses
bpaDomainName :: Lens' BatchPutAttributes Text Source
The name of the domain in which the attributes are being stored.
bpaItems :: Lens' BatchPutAttributes [ReplaceableItem] Source
A list of items on which to perform the operation.