diff --git a/hazelcast/pom.xml b/hazelcast/pom.xml index cc366cd0a6..705792ad05 100644 --- a/hazelcast/pom.xml +++ b/hazelcast/pom.xml @@ -13,16 +13,12 @@ - - com.hazelcast - hazelcast - ${hazelcast.version} - - - com.hazelcast - hazelcast-client - ${hazelcast.version} - + + + com.hazelcast.jet + hazelcast-jet + ${hazelcast.jet.version} + @@ -36,8 +32,8 @@ - - 3.8.4 + + 0.6 \ No newline at end of file diff --git a/hazelcast/src/main/java/com/baeldung/hazelcast/jet/WordCounter.java b/hazelcast/src/main/java/com/baeldung/hazelcast/jet/WordCounter.java new file mode 100644 index 0000000000..971986bcae --- /dev/null +++ b/hazelcast/src/main/java/com/baeldung/hazelcast/jet/WordCounter.java @@ -0,0 +1,51 @@ +package com.baeldung.hazelcast.jet; + +import java.util.List; +import java.util.Map; + +import static com.hazelcast.jet.Traversers.traverseArray; +import static com.hazelcast.jet.aggregate.AggregateOperations.counting; +import static com.hazelcast.jet.function.DistributedFunctions.wholeItem; + +import com.hazelcast.jet.Jet; +import com.hazelcast.jet.JetInstance; +import com.hazelcast.jet.pipeline.Pipeline; +import com.hazelcast.jet.pipeline.Sinks; +import com.hazelcast.jet.pipeline.Sources; + +public class WordCounter { + + private static final String LIST_NAME = "textList"; + + private static final String MAP_NAME = "countMap"; + + private Pipeline createPipeLine() { + Pipeline p = Pipeline.create(); + p.drawFrom(Sources. list(LIST_NAME)) + .flatMap(word -> traverseArray(word.toLowerCase() + .split("\\W+"))) + .filter(word -> !word.isEmpty()) + .groupingKey(wholeItem()) + .aggregate(counting()) + .drainTo(Sinks.map(MAP_NAME)); + return p; + } + + public Long countWord(List sentences, String word) { + long count = 0; + JetInstance jet = Jet.newJetInstance(); + try { + List textList = jet.getList(LIST_NAME); + textList.addAll(sentences); + Pipeline p = createPipeLine(); + jet.newJob(p) + .join(); + Map counts = jet.getMap(MAP_NAME); + count = counts.get(word); + } finally { + Jet.shutdownAll(); + } + return count; + } + +} diff --git a/hazelcast/src/test/java/com/baeldung/hazelcast/jet/WordCounterUnitTest.java b/hazelcast/src/test/java/com/baeldung/hazelcast/jet/WordCounterUnitTest.java new file mode 100644 index 0000000000..95596b3860 --- /dev/null +++ b/hazelcast/src/test/java/com/baeldung/hazelcast/jet/WordCounterUnitTest.java @@ -0,0 +1,21 @@ +package com.baeldung.hazelcast.jet; + +import static org.junit.Assert.assertTrue; + +import java.util.ArrayList; +import java.util.List; + +import org.junit.Test; + +public class WordCounterUnitTest { + + @Test + public void whenGivenSentencesAndWord_ThenReturnCountOfWord() { + List sentences = new ArrayList<>(); + sentences.add("The first second was alright, but the second second was tough."); + WordCounter wordCounter = new WordCounter(); + long countSecond = wordCounter.countWord(sentences, "second"); + assertTrue(countSecond == 3); + } + +}