com.hazelcast.jet.avro

Class AvroSinks

java.lang.Object

com.hazelcast.jet.avro.AvroSinks

public final class AvroSinks
extends Object

Contains factory methods for Apache Avro sinks.

Since:

Jet 3.0

Method Summary

Modifier and Type	Method and Description
static <R> Sink<R>	files(String directoryName, Class<R> recordClass, org.apache.avro.Schema schema) Convenience for files(String, Schema, SupplierEx) which uses either SpecificDatumWriter or ReflectDatumWriter depending on the supplied recordClass.
static Sink<org.apache.avro.generic.IndexedRecord>	files(String directoryName, org.apache.avro.Schema schema) Convenience for files(String, Schema, SupplierEx) which uses GenericDatumWriter.
static <R> Sink<R>	files(String directoryName, org.apache.avro.Schema schema, SupplierEx<org.apache.avro.io.DatumWriter<R>> datumWriterSupplier) Returns a sink that that writes the items it receives to Apache Avro files.

Methods inherited from class java.lang.Object

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

Method Detail

files

@Nonnull
public static <R> Sink<R> files(@Nonnull
                                         String directoryName,
                                         @Nonnull
                                         org.apache.avro.Schema schema,
                                         @Nonnull
                                         SupplierEx<org.apache.avro.io.DatumWriter<R>> datumWriterSupplier)

Returns a sink that that writes the items it receives to Apache Avro files. Each processor will write to its own file whose name is equal to the processor's global index (an integer unique to each processor of the vertex), but a single pathname is used to resolve the containing directory of all files, on all cluster members. The sink always overwrites the files.

The sink creates a DataFileWriter for each processor using the supplied datumWriterSupplier with the given Schema.

No state is saved to snapshot for this sink. After the job is restarted, the items will be missing since files will be overwritten.

The default local parallelism for this sink is 1.

Type Parameters:

R - the type of the record

Parameters:

directoryName - directory to create the files in. Will be created if it doesn't exist. Must be the same on all members.

schema - the record schema

datumWriterSupplier - the record writer supplier

files

@Nonnull
public static <R> Sink<R> files(@Nonnull
                                         String directoryName,
                                         @Nonnull
                                         Class<R> recordClass,
                                         @Nonnull
                                         org.apache.avro.Schema schema)

Convenience for files(String, Schema, SupplierEx) which uses either SpecificDatumWriter or ReflectDatumWriter depending on the supplied recordClass.

files

@Nonnull
public static Sink<org.apache.avro.generic.IndexedRecord> files(@Nonnull
                                                                         String directoryName,
                                                                         @Nonnull
                                                                         org.apache.avro.Schema schema)

Convenience for files(String, Schema, SupplierEx) which uses GenericDatumWriter.