org.apache.flink.batch.connectors.cassandra

Class CassandraPojoInputFormat<OUT>

java.lang.Object

org.apache.flink.api.common.io.RichInputFormat<OUT,InputSplit>

org.apache.flink.batch.connectors.cassandra.CassandraInputFormatBase<OUT>

org.apache.flink.batch.connectors.cassandra.CassandraPojoInputFormat<OUT>

Type Parameters:

OUT - type of inputClass

All Implemented Interfaces:

Serializable, InputFormat<OUT,InputSplit>, NonParallelInput, InputSplitSource<InputSplit>

public class CassandraPojoInputFormat<OUT>
extends CassandraInputFormatBase<OUT>

InputFormat to read data from Apache Cassandra and generate a custom Cassandra annotated object.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.batch.connectors.cassandra.CassandraInputFormatBase

cluster, logger, query, session

Constructor Summary

Constructors

Constructor and Description
CassandraPojoInputFormat(String query, ClusterBuilder builder, Class<OUT> inputClass)
CassandraPojoInputFormat(String query, ClusterBuilder builder, Class<OUT> inputClass, MapperOptions mapperOptions)

Method Summary

Modifier and Type	Method and Description
OUT	nextRecord(OUT reuse) Reads the next record from the input.
void	open(InputSplit split) Opens a parallel instance of the input format to work on a split.
boolean	reachedEnd() Method used to check if the end of the input is reached.

Methods inherited from class org.apache.flink.batch.connectors.cassandra.CassandraInputFormatBase

close, configure, createInputSplits, getInputSplitAssigner, getStatistics

Methods inherited from class org.apache.flink.api.common.io.RichInputFormat

closeInputFormat, getRuntimeContext, openInputFormat, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

CassandraPojoInputFormat

public CassandraPojoInputFormat(String query,
                                ClusterBuilder builder,
                                Class<OUT> inputClass)

CassandraPojoInputFormat

public CassandraPojoInputFormat(String query,
                                ClusterBuilder builder,
                                Class<OUT> inputClass,
                                MapperOptions mapperOptions)

Method Detail

open

public void open(InputSplit split)

Description copied from interface: InputFormat

Opens a parallel instance of the input format to work on a split.

When this method is called, the input format it guaranteed to be configured.

Parameters:

split - The split to be opened.

reachedEnd

public boolean reachedEnd()

Description copied from interface: InputFormat

Method used to check if the end of the input is reached.

When this method is called, the input format it guaranteed to be opened.

Returns:

True if the end is reached, otherwise false.

nextRecord

public OUT nextRecord(OUT reuse)

Description copied from interface: InputFormat

Reads the next record from the input.

When this method is called, the input format it guaranteed to be opened.

Parameters:

reuse - Object that may be reused.

Returns:

Read record.