Package io.trino.plugin.accumulo.io

Class AccumuloPageSink

java.lang.Object

io.trino.plugin.accumulo.io.AccumuloPageSink

All Implemented Interfaces:

ConnectorPageSink

public class AccumuloPageSink
extends Object
implements ConnectorPageSink

Output class for serializing Trino pages (blocks of rows of data) to Accumulo. This class converts the rows from within a page to a collection of Accumulo Mutations, writing and indexed the rows. Writers are flushed and closed on commit, and if a rollback occurs... we'll you're gonna have a bad time.

See Also:

AccumuloPageSinkProvider

Field Summary

Fields

Modifier and Type	Field	Description
static org.apache.hadoop.io.Text	ROW_ID_COLUMN

Fields inherited from interface io.trino.spi.connector.ConnectorPageSink

NOT_BLOCKED

Constructor Summary

Constructors

Constructor	Description
AccumuloPageSink(org.apache.accumulo.core.client.Connector connector, AccumuloTable table, String username)

Method Summary

Modifier and Type	Method	Description
void	abort()
CompletableFuture<?>	appendPage(Page page)
CompletableFuture<Collection<io.airlift.slice.Slice>>	finish()
static org.apache.accumulo.core.data.Mutation	toMutation(Row row, int rowIdOrdinal, List<AccumuloColumnHandle> columns, AccumuloRowSerializer serializer)	Converts a Row to an Accumulo mutation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.trino.spi.connector.ConnectorPageSink

getCompletedBytes, getSystemMemoryUsage, getValidationCpuNanos

Field Detail

ROW_ID_COLUMN

public static final org.apache.hadoop.io.Text ROW_ID_COLUMN

Constructor Detail

AccumuloPageSink

public AccumuloPageSink(org.apache.accumulo.core.client.Connector connector,
                        AccumuloTable table,
                        String username)

Method Detail

toMutation

public static org.apache.accumulo.core.data.Mutation toMutation(Row row,
                                                                int rowIdOrdinal,
                                                                List<AccumuloColumnHandle> columns,
                                                                AccumuloRowSerializer serializer)

Converts a Row to an Accumulo mutation.

Parameters:

row - Row object

rowIdOrdinal - Ordinal in the list of columns that is the row ID. This isn't checked at all, so I hope you're right. Also, it is expected that the list of column handles is sorted in ordinal order. This is a very demanding function.

columns - All column handles for the Row, sorted by ordinal.

serializer - Instance of AccumuloRowSerializer used to encode the values of the row to the Mutation

Returns:

Mutation

appendPage

public CompletableFuture<?> appendPage(Page page)

Specified by:

appendPage in interface ConnectorPageSink

finish

public CompletableFuture<Collection<io.airlift.slice.Slice>> finish()

Specified by:

finish in interface ConnectorPageSink

abort

public void abort()

Specified by:

abort in interface ConnectorPageSink