Package software.amazon.awssdk.enhanced.dynamodb.internal.operations

Interface DatabaseOperation<RequestT,​ResponseT,​ResultT>

  • Type Parameters:
    RequestT - The type of the request object for the DynamoDb call in the low level DynamoDbClient.
    ResponseT - The type of the response object for the DynamoDb call in the low level DynamoDbClient.
    ResultT - The type of the mapped result object that will be returned by the execution of this operation.
    All Known Implementing Classes:
    BatchWriteItemOperation, TransactGetItemsOperation, TransactWriteItemsOperation
    public interface DatabaseOperation<RequestT,​ResponseT,​ResultT>
    Interface for a single operation that can be executed against a mapped database. These operations do not operate on a specific table or index, and may reference multiple tables and indexes (eg: batch operations). Conceptually an operation maps 1:1 with an actual DynamoDb call.

    • Method Detail

      • serviceCall

        Function<RequestT,​ResponseT> serviceCall​(DynamoDbClient dynamoDbClient)
        Provides a function for making the low level synchronous SDK call to DynamoDb.
        Parameters:
        dynamoDbClient - A low level DynamoDbClient to make the call against.
        Returns:
        A function that calls DynamoDb with a provided request object and returns the response object.

      • transformResponse

        ResultT transformResponse​(ResponseT response,
                          DynamoDbEnhancedClientExtension extension)
        Takes the response object returned by the actual DynamoDb call and maps it into a higher level abstracted result object.
        Parameters:
        response - The response object returned by the DynamoDb call for this operation.
        extension - A DynamoDbEnhancedClientExtension that may modify the result of this operation. A null value here will result in no modifications.
        Returns:
        A high level result object as specified by the implementation of this operation.

      • execute

        default ResultT execute​(DynamoDbClient dynamoDbClient,
                        DynamoDbEnhancedClientExtension extension)
        Default implementation of a complete synchronous execution of this operation. It performs three steps: 1) Call generateRequest() to get the request object. 2) Call getServiceCall() and call it using the request object generated in the previous step. 3) Call transformResponse() to convert the response object returned in the previous step to a high level result.
        Parameters:
        dynamoDbClient - A DynamoDbClient to make the call against.
        extension - A DynamoDbEnhancedClientExtension that may modify the request or result of this operation. A null value here will result in no modifications.
        Returns:
        A high level result object as specified by the implementation of this operation.

      • executeAsync

        default CompletableFuture<ResultT> executeAsync​(DynamoDbAsyncClient dynamoDbAsyncClient,
                                                DynamoDbEnhancedClientExtension extension)
        Default implementation of a complete non-blocking asynchronous execution of this operation. It performs three steps: 1) Call generateRequest() to get the request object. 2) Call getServiceCall() and call it using the request object generated in the previous step. 3) Wraps the CompletableFuture returned by the SDK in a new one that calls transformResponse() to convert the response object returned in the previous step to a high level result.
        Parameters:
        dynamoDbAsyncClient - A DynamoDbAsyncClient to make the call against.
        extension - A DynamoDbEnhancedClientExtension that may modify the request or result of this operation. A null value here will result in no modifications.
        Returns:
        A high level result object as specified by the implementation of this operation.

      • operationName

        OperationName operationName()
        The type, or name, of the operation.