net.e6tech.elements.cassandra.etl

Class Transformer<T,E>

java.lang.Object

net.e6tech.elements.cassandra.etl.Transformer<T,E>

Type Parameters:

T - Transformed type

E - Extracted type

public class Transformer<T,E>
extends java.lang.Object

This is a convenient class for helping to transform an array of extracted entities of type E to another set of entities of type T.

Constructor Summary

Constructors

Constructor and Description
Transformer(net.e6tech.elements.common.resources.Provision provision, java.lang.Class<T> cls)

Method Summary

Modifier and Type	Method and Description
Transformer<T,E>	addPrimaryKey(PrimaryKey key, E e)
void	checkpoint(E extraction, T t)
T	computeIfAbsent(PrimaryKey key)
T	computeIfAbsent(PrimaryKey key, java.util.function.Consumer<T> consumer)
Async	createAsync()
Async	createAsync(com.datastax.driver.core.PreparedStatement stmt)
Async	createAsync(java.lang.String query)
java.util.Collection<net.e6tech.elements.common.util.datastructure.Pair<PrimaryKey,E>>	entries()
Transformer<T,E>	forEachCreateIfNotExist(java.util.function.BiConsumer<E,T> consumer)
java.util.Set<PrimaryKey>	keys()
java.util.Set<PrimaryKey>	keySet()
Transformer<T,E>	load()
Transformer<T,E>	put(PrimaryKey key, T t)
Transformer<T,E>	save(com.datastax.driver.mapping.Mapper.Option... options)
int	size()
Transformer<T,E>	transform(java.util.Collection<E> collection, java.util.function.BiConsumer<Transformer<T,E>,E> consumer)
Transformer<T,E>	transform(E[] array, java.util.function.BiConsumer<Transformer<T,E>,E> consumer)
Transformer<T,E>	transform(java.util.stream.Stream<E> stream, java.util.function.BiConsumer<Transformer<T,E>,E> consumer)
java.util.Collection<T>	values()

Methods inherited from class java.lang.Object

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

Constructor Detail

Transformer

public Transformer(net.e6tech.elements.common.resources.Provision provision,
                   java.lang.Class<T> cls)

Method Detail

transform

public Transformer<T,E> transform(java.util.stream.Stream<E> stream,
                                  java.util.function.BiConsumer<Transformer<T,E>,E> consumer)

transform

public Transformer<T,E> transform(E[] array,
                                  java.util.function.BiConsumer<Transformer<T,E>,E> consumer)

transform

public Transformer<T,E> transform(java.util.Collection<E> collection,
                                  java.util.function.BiConsumer<Transformer<T,E>,E> consumer)

createAsync

public Async createAsync()

createAsync

public Async createAsync(java.lang.String query)

createAsync

public Async createAsync(com.datastax.driver.core.PreparedStatement stmt)

addPrimaryKey

public Transformer<T,E> addPrimaryKey(PrimaryKey key,
                                      E e)

load

public Transformer<T,E> load()

keys

public java.util.Set<PrimaryKey> keys()

entries

public java.util.Collection<net.e6tech.elements.common.util.datastructure.Pair<PrimaryKey,E>> entries()

put

public Transformer<T,E> put(PrimaryKey key,
                            T t)

computeIfAbsent

public T computeIfAbsent(PrimaryKey key)

computeIfAbsent

public T computeIfAbsent(PrimaryKey key,
                         java.util.function.Consumer<T> consumer)

forEachCreateIfNotExist

public Transformer<T,E> forEachCreateIfNotExist(java.util.function.BiConsumer<E,T> consumer)

save

public Transformer<T,E> save(com.datastax.driver.mapping.Mapper.Option... options)

values

public java.util.Collection<T> values()

keySet

public java.util.Set<PrimaryKey> keySet()

size

public int size()

checkpoint

public void checkpoint(E extraction,
                       T t)