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Uses of Class
org.apache.crunch.DoFn

Packages that use DoFn

org.apache.crunch	Client-facing API and core abstractions.
org.apache.crunch.contrib.bloomfilter	Support for creating Bloom Filters.
org.apache.crunch.fn	Commonly used functions for manipulating collections.
org.apache.crunch.lib	Joining, sorting, aggregating, and other commonly used functionality.
org.apache.crunch.lib.join	Inner and outer joins on collections.
org.apache.crunch.lib.sort
org.apache.crunch.types	Common functionality for business object serialization.

Uses of DoFn in org.apache.crunch

Subclasses of DoFn in org.apache.crunch

class	CombineFn<S,T> A special DoFn implementation that converts an Iterable of values into a single value.
static class	CombineFn.AggregatorCombineFn<K,V> Deprecated. Use the Aggregators.toCombineFn(org.apache.crunch.Aggregator) adapter
class	FilterFn<T> A DoFn for the common case of filtering the members of a PCollection based on a boolean condition.
static class	FilterFn.AndFn<S> Deprecated. Use FilterFns.and(FilterFn...)
static class	FilterFn.NotFn<S> Deprecated. Use FilterFns.not(FilterFn)
static class	FilterFn.OrFn<S> Deprecated. Use FilterFns.or(FilterFn...)
class	MapFn<S,T> A DoFn for the common case of emitting exactly one value for each input record.

Methods in org.apache.crunch with parameters of type DoFn

<K,V> PTable<K,V>	PCollection.parallelDo(DoFn<S,Pair<K,V>> doFn, PTableType<K,V> type) Similar to the other parallelDo instance, but returns a PTable instance instead of a PCollection.
<T> PCollection<T>	PCollection.parallelDo(DoFn<S,T> doFn, PType<T> type) Applies the given doFn to the elements of this PCollection and returns a new PCollection that is the output of this processing.
<K,V> PTable<K,V>	PCollection.parallelDo(String name, DoFn<S,Pair<K,V>> doFn, PTableType<K,V> type) Similar to the other parallelDo instance, but returns a PTable instance instead of a PCollection.
<K,V> PTable<K,V>	PCollection.parallelDo(String name, DoFn<S,Pair<K,V>> doFn, PTableType<K,V> type, ParallelDoOptions options) Similar to the other parallelDo instance, but returns a PTable instance instead of a PCollection.
<T> PCollection<T>	PCollection.parallelDo(String name, DoFn<S,T> doFn, PType<T> type) Applies the given doFn to the elements of this PCollection and returns a new PCollection that is the output of this processing.
<T> PCollection<T>	PCollection.parallelDo(String name, DoFn<S,T> doFn, PType<T> type, ParallelDoOptions options) Applies the given doFn to the elements of this PCollection and returns a new PCollection that is the output of this processing.

Uses of DoFn in org.apache.crunch.contrib.bloomfilter

Subclasses of DoFn in org.apache.crunch.contrib.bloomfilter

class

BloomFilterFn<S> The class is responsible for generating keys that are used in a BloomFilter

Uses of DoFn in org.apache.crunch.fn

Subclasses of DoFn in org.apache.crunch.fn

class	CompositeMapFn<R,S,T>
class	ExtractKeyFn<K,V> Wrapper function for converting a MapFn into a key-value pair that is used to convert from a PCollection<V> to a PTable<K, V>.
class	IdentityFn<T>
class	MapKeysFn<K1,K2,V> Deprecated. Use PTable.mapKeys(org.apache.crunch.MapFn, org.apache.crunch.types.PType)
class	MapValuesFn<K,V1,V2> Deprecated. Use PTable.mapValues(org.apache.crunch.MapFn, org.apache.crunch.types.PType)
class	PairMapFn<K,V,S,T>

Uses of DoFn in org.apache.crunch.lib

Subclasses of DoFn in org.apache.crunch.lib

static class	Aggregate.TopKCombineFn<K,V>
static class	Aggregate.TopKFn<K,V>

Methods in org.apache.crunch.lib with parameters of type DoFn

static <K,V1,V2,U,V> PTable<U,V>	SecondarySort.sortAndApply(PTable<K,Pair<V1,V2>> input, DoFn<Pair<K,Iterable<Pair<V1,V2>>>,Pair<U,V>> doFn, PTableType<U,V> ptype) Perform a secondary sort on the given PTable instance and then apply a DoFn to the resulting sorted data to yield an output PTable<U, V>.
static <K,V1,V2,U,V> PTable<U,V>	SecondarySort.sortAndApply(PTable<K,Pair<V1,V2>> input, DoFn<Pair<K,Iterable<Pair<V1,V2>>>,Pair<U,V>> doFn, PTableType<U,V> ptype, int numReducers) Perform a secondary sort on the given PTable instance and then apply a DoFn to the resulting sorted data to yield an output PTable<U, V>, using the given number of reducers.
static <K,V1,V2,T> PCollection<T>	SecondarySort.sortAndApply(PTable<K,Pair<V1,V2>> input, DoFn<Pair<K,Iterable<Pair<V1,V2>>>,T> doFn, PType<T> ptype) Perform a secondary sort on the given PTable instance and then apply a DoFn to the resulting sorted data to yield an output PCollection<T>.
static <K,V1,V2,T> PCollection<T>	SecondarySort.sortAndApply(PTable<K,Pair<V1,V2>> input, DoFn<Pair<K,Iterable<Pair<V1,V2>>>,T> doFn, PType<T> ptype, int numReducers) Perform a secondary sort on the given PTable instance and then apply a DoFn to the resulting sorted data to yield an output PCollection<T>, using the given number of reducers.

Uses of DoFn in org.apache.crunch.lib.join

Subclasses of DoFn in org.apache.crunch.lib.join

class	FullOuterJoinFn<K,U,V> Used to perform the last step of an full outer join.
class	InnerJoinFn<K,U,V> Used to perform the last step of an inner join.
class	JoinFn<K,U,V> Represents a DoFn for performing joins.
class	LeftOuterJoinFn<K,U,V> Used to perform the last step of an left outer join.
class	RightOuterJoinFn<K,U,V> Used to perform the last step of an right outer join.

Methods in org.apache.crunch.lib.join with parameters of type DoFn

static <K,U,V,T> PCollection<T>

OneToManyJoin.oneToManyJoin(PTable<K,U> left, PTable<K,V> right, DoFn<Pair<U,Iterable<V>>,T> postProcessFn, PType<T> ptype) Performs a join on two tables, where the left table only contains a single value per key.

Uses of DoFn in org.apache.crunch.lib.sort

Subclasses of DoFn in org.apache.crunch.lib.sort

static class	SortFns.AvroGenericFn<V extends Tuple> Pulls a composite set of keys from an Avro GenericRecord instance.
static class	SortFns.SingleKeyFn<V extends Tuple,K> Extracts a single indexed key from a Tuple instance.
static class	SortFns.TupleKeyFn<V extends Tuple,K extends Tuple> Extracts a composite key from a Tuple instance.

Uses of DoFn in org.apache.crunch.types

Subclasses of DoFn in org.apache.crunch.types

static class

PGroupedTableType.PairIterableMapFn<K,V>

Methods in org.apache.crunch.types that return DoFn

static <M extends com.google.protobuf.Message> DoFn<String,M>

Protos.lineParser(String sep, Class<M> msgClass)