MapReduce Frameworks Lab
Contents
class StudentIndividualMapContext
public void emit(K key, V value)
Word Count Application
class WordCountMapper
public void map(MapContext<String, Integer> context, String[] lineOfWords)
class WordCountReducer
public FinishAccumulator<Integer> createAccumulator()
Test
class TestWordCountApplicationWithInstructorFramework
Mutual Friends Application
class MutualFriendsMapper
public void map(MapContext<OrderedPair<AccountId>, List<AccountId>> context, Account account)
class MutualFriendsReducer
public FinishAccumulator<List<AccountId>> createAccumulator()
Test
class TestMutualFriendsApplicationWithInstructorFramework
class WordCountConcreteStaticMapReduce (optional but encouraged)
mapAll
private static IndividualMapContext<String, Integer>[] mapAll(String[][] S, WordCountMapper mapper) throws SuspendableException
groupAll
private static Map<String, List<Integer>> groupAll(IndividualMapContext<String, Integer>[] f_of_S)
reduceAll
private static Map<String, Integer> reduceAll(Map<String, List<Integer>> grouped_f_of_S, WordCountReducer reducer) throws SuspendableException
class MutualFriendsConcreteStaticMapReduce (optional but encouraged)
mapAll
private static IndividualMapContext<OrderedPair<AccountId>, List<AccountId>>[] mapAll(Account[] S, MutualFriendsMapper mapper) throws SuspendableException ==groupAll==private static Map<OrderedPair<AccountId>, List<List<AccountId>>> groupAll(IndividualMapContext<OrderedPair<AccountId>, List<AccountId>>[] f_of_S)
reduceAll
private static Map<OrderedPair<AccountId>, List<AccountId>> reduceAll(Map<OrderedPair<AccountId>, List<List<AccountId>>> grouped_f_of_S, MutualFriendsReducer reducer) throws SuspendableException
