Package org.apache.cassandra.cdc.avro

Class CdcEventAvroEncoder

java.lang.Object

org.apache.cassandra.cdc.avro.CdcEventAvroEncoder

All Implemented Interfaces:

CdcEventTransformer<org.apache.avro.generic.GenericData.Record>

Direct Known Subclasses:

AvroBaseRecordTransformer, AvroJsonTransformer

public abstract class CdcEventAvroEncoder
extends java.lang.Object
implements CdcEventTransformer<org.apache.avro.generic.GenericData.Record>

Base abstraction to convert CdcEvent objects into another data format, e.g. Avro, Json etc

Field Summary

Fields

Modifier and Type	Field	Description
org.apache.avro.Schema	cdcSchema
protected org.apache.avro.io.BinaryEncoder	encoder
org.apache.avro.Schema	rangeSchema
protected SchemaStore	store
org.apache.avro.Schema	ttlSchema
protected java.util.function.Function<org.apache.cassandra.cdc.api.KeyspaceTypeKey,org.apache.cassandra.spark.data.CqlField.CqlType>	typeLookup

Constructor Summary

Constructors

Constructor	Description
CdcEventAvroEncoder(SchemaStore store, java.util.function.Function<org.apache.cassandra.cdc.api.KeyspaceTypeKey,org.apache.cassandra.spark.data.CqlField.CqlType> typeLookup, java.lang.String templatePath)

Method Summary

Modifier and Type	Method	Description
protected void	applyCommonFields(org.apache.cassandra.cdc.msg.CdcEvent event, org.apache.avro.generic.GenericData.Record record, java.util.function.Function<org.apache.cassandra.cdc.msg.Value,java.lang.Object> avroFieldEncoder)
byte[]	encode(org.apache.avro.generic.GenericDatumWriter<org.apache.avro.generic.GenericRecord> writer, org.apache.avro.generic.GenericData.Record record)	Encode the transformed CdcEvent to a byte array.
abstract org.apache.avro.generic.GenericData.Record	transform(org.apache.cassandra.cdc.msg.CdcEvent event)	Transform CdcEvent into Avro record.

Methods inherited from class java.lang.Object

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

Field Detail

cdcSchema

public final org.apache.avro.Schema cdcSchema

ttlSchema

public final org.apache.avro.Schema ttlSchema

rangeSchema

public final org.apache.avro.Schema rangeSchema

encoder

protected final org.apache.avro.io.BinaryEncoder encoder

typeLookup

protected final java.util.function.Function<org.apache.cassandra.cdc.api.KeyspaceTypeKey,org.apache.cassandra.spark.data.CqlField.CqlType> typeLookup

store

protected final SchemaStore store

Constructor Detail

CdcEventAvroEncoder

public CdcEventAvroEncoder(SchemaStore store,
                           java.util.function.Function<org.apache.cassandra.cdc.api.KeyspaceTypeKey,org.apache.cassandra.spark.data.CqlField.CqlType> typeLookup,
                           java.lang.String templatePath)

Method Detail

transform

public abstract org.apache.avro.generic.GenericData.Record transform(org.apache.cassandra.cdc.msg.CdcEvent event)

Transform CdcEvent into Avro record.

Specified by:

transform in interface CdcEventTransformer<org.apache.avro.generic.GenericData.Record>

Parameters:

event - the CdcEvent

Returns:

transformed cdc event as an Avro GenericData.Record

applyCommonFields

protected void applyCommonFields(org.apache.cassandra.cdc.msg.CdcEvent event,
                                 org.apache.avro.generic.GenericData.Record record,
                                 java.util.function.Function<org.apache.cassandra.cdc.msg.Value,java.lang.Object> avroFieldEncoder)

encode

public byte[] encode(org.apache.avro.generic.GenericDatumWriter<org.apache.avro.generic.GenericRecord> writer,
                     org.apache.avro.generic.GenericData.Record record)

Encode the transformed CdcEvent to a byte array.

Parameters:

writer - the Avro record writer

record - the CdcEvent transformed as a GenericData.Record

Returns:

Avro message serialized to bytes