Package org.springframework.data.cassandra.core.cql

Class AsyncRowMapperResultSetExtractor<T>

java.lang.Object

org.springframework.data.cassandra.core.cql.AsyncRowMapperResultSetExtractor<T>

All Implemented Interfaces:

AsyncResultSetExtractor<List<T>>

public class AsyncRowMapperResultSetExtractor<T>
extends Object
implements AsyncResultSetExtractor<List<T>>

Adapter implementation of the ResultSetExtractor interface that delegates to a RowMapper which is supposed to create an object for each row. Each object is added to the results List of this ResultSetExtractor.

Useful for the typical case of one object per row in the database table. The number of entries in the results will match the number of rows.

Note that a RowMapper object is typically stateless and thus reusable.

Since:

3.0

Author:

Mark Paluch

See Also:

• RowMapper
• AsyncCqlTemplate

Constructor Summary

Constructors

Constructor	Description
AsyncRowMapperResultSetExtractor(RowMapper<T> rowMapper)	Create a new AsyncRowMapperResultSetExtractor.

Method Summary

Modifier and Type	Method	Description
CompletableFuture<List<T>>	extractData(com.datastax.oss.driver.api.core.cql.AsyncResultSet resultSet)	Implementations must implement this method to process the entire AsyncResultSet.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AsyncRowMapperResultSetExtractor

public AsyncRowMapperResultSetExtractor(RowMapper<T> rowMapper)

Create a new AsyncRowMapperResultSetExtractor.

Parameters:

rowMapper - the RowMapper which creates an object for each row, must not be null.

Method Details

extractData

public CompletableFuture<List<T>> extractData(com.datastax.oss.driver.api.core.cql.AsyncResultSet resultSet)
                                       throws com.datastax.oss.driver.api.core.DriverException,
DataAccessException

Description copied from interface: AsyncResultSetExtractor

Implementations must implement this method to process the entire AsyncResultSet.

Specified by:

extractData in interface AsyncResultSetExtractor<T>

Parameters:

resultSet - AsyncResultSet to extract data from.

Returns:

an arbitrary result object, or null if none (the extractor will typically be stateful in the latter case).

Throws:

com.datastax.oss.driver.api.core.DriverException - if a DriverException is encountered getting column values or navigating (that is, there's no need to catch DriverException)

DataAccessException - in case of custom exceptions