Uses of Interface
org.apache.crunch.lib.join.JoinStrategy

Packages that use JoinStrategy

Package	Description
org.apache.crunch.lambda	Alternative Crunch API using Java 8 features to allow construction of pipelines using lambda functions and method references.
org.apache.crunch.lib.join	Inner and outer joins on collections.

Uses of JoinStrategy in org.apache.crunch.lambda

Methods in org.apache.crunch.lambda with parameters of type JoinStrategy

Modifier and Type	Method and Description
default <U> LTable<K,Pair<V,U>>	LTable.join(LTable<K,U> other, JoinType joinType, JoinStrategy<K,V,U> joinStrategy) Join this table to another LTable which has the same key type using the provided JoinType and JoinStrategy

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

Classes in org.apache.crunch.lib.join that implement JoinStrategy

Modifier and Type	Class and Description
class	BloomFilterJoinStrategy<K,U,V> Join strategy that uses a Bloom filter that is trained on the keys of the left-side table to filter the key/value pairs of the right-side table before sending through the shuffle and reduce phase.
class	DefaultJoinStrategy<K,U,V> Default join strategy that simply sends all data through the map, shuffle, and reduce phase.
class	MapsideJoinStrategy<K,U,V> Utility for doing map side joins on a common key between two PTables.
class	ShardedJoinStrategy<K,U,V> JoinStrategy that splits the key space up into shards.

Constructors in org.apache.crunch.lib.join with parameters of type JoinStrategy

Constructor and Description
BloomFilterJoinStrategy(int numElements, float falsePositiveRate, JoinStrategy<K,U,V> delegateJoinStrategy) Instantiate with the expected number of unique keys in the left table, and the acceptable false positive rate for the Bloom filter, and an underlying join strategy to delegate to.