From e1f0edd5c3fb32ce1fd5436b9653a7ebdcc14edf Mon Sep 17 00:00:00 2001
From: sotech117 <michael_foiani@brown.edu>
Date: Sun, 10 Dec 2023 14:46:20 -0500
Subject: 1st iteration

---
 mapreduce/MapReduce.java | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

(limited to 'mapreduce')

diff --git a/mapreduce/MapReduce.java b/mapreduce/MapReduce.java
index f993f09..aebd4a3 100644
--- a/mapreduce/MapReduce.java
+++ b/mapreduce/MapReduce.java
@@ -44,20 +44,42 @@ public class MapReduce<IN, K, V, OUT>
     Set<Mapper<IN, K, V>> mappers = new HashSet<>();
     // TODO: for each element in inputList, create a mapper thread, set its input, and execute it
     // helpful methods: Supplier.get() ForkJoinPool.execute()
-    
+    for (IN input : inputList) {
+      Mapper<IN, K, V> mapper = mapperSupplier.get();
+      mapper.setInput(input);
+      pool.execute(mapper);
+      mappers.add(mapper);
+    }
+
     Map<K, List<V>> mapResults = new HashMap<>();
     // TODO: for each mapper thread, join and merge the results
     // helpful methods: ForkJoinTask.join()
+    for (Mapper<IN, K, V> mapper : mappers) {
+      Map<K, V> map = mapper.join();
+      for (K key : map.keySet()) {
+        mapResults.putIfAbsent(key, new LinkedList<>());
+        mapResults.get(key).add(map.get(key));
+      }
+    }
 
     Map<K, Reducer<K, V, OUT>> reducers = new HashMap<>();
     // TODO: for each key in the mappers'results, create a reducer thread, set its input, and execute it
     // helpful methods: Supplier.get() ForkJoinPool.execute()
+    mapResults.forEach((key, value) -> {
+      Reducer<K, V, OUT> reducer = reducerSupplier.get();
+      reducer.setInput(key, value);
+      pool.execute(reducer);
+      reducers.put(key, reducer);
+    });
 
     Map<K, OUT> result = new HashMap<>();
     // TODO: for each reducer thread, join and merge the result to the final result
     // helpful methods: ForkJoinTask.join()
-    
-    throw new UnsupportedOperationException("MapReduce.call() not implemented yet.");
+    reducers.forEach((key, reducer) -> {
+      result.put(key, reducer.join());
+    });
+
+    return result;
   }
 
   /**
-- 
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