From 55d9c923b04389ed5c6b9d6794587fa794384a5f Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Sun, 26 Jun 2022 13:05:46 +0200
Subject: [PATCH] splitter: 1.0.0-vanilla-kafka - Factored out splitting logic

---
 .../wordcount/splitter/MessageSplitter.java     | 17 +++++++++++++++++
 .../splitter/SplitterStreamProcessor.java       |  9 +++++----
 2 files changed, 22 insertions(+), 4 deletions(-)
 create mode 100644 src/main/java/de/juplo/kafka/wordcount/splitter/MessageSplitter.java

diff --git a/src/main/java/de/juplo/kafka/wordcount/splitter/MessageSplitter.java b/src/main/java/de/juplo/kafka/wordcount/splitter/MessageSplitter.java
new file mode 100644
index 0000000..0665f3e
--- /dev/null
+++ b/src/main/java/de/juplo/kafka/wordcount/splitter/MessageSplitter.java
@@ -0,0 +1,17 @@
+package de.juplo.kafka.wordcount.splitter;
+
+import org.springframework.stereotype.Component;
+
+import java.util.regex.Pattern;
+
+
+@Component
+public class MessageSplitter
+{
+  final static Pattern PATTERN = Pattern.compile("\\W+");
+
+  String[] split(String message)
+  {
+    return PATTERN.split(message);
+  }
+}
diff --git a/src/main/java/de/juplo/kafka/wordcount/splitter/SplitterStreamProcessor.java b/src/main/java/de/juplo/kafka/wordcount/splitter/SplitterStreamProcessor.java
index 191428c..fabae8f 100644
--- a/src/main/java/de/juplo/kafka/wordcount/splitter/SplitterStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/splitter/SplitterStreamProcessor.java
@@ -19,7 +19,6 @@ import java.time.Duration;
 import java.util.*;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
-import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
 
@@ -27,8 +26,7 @@ import java.util.stream.Collectors;
 @Slf4j
 public class SplitterStreamProcessor implements Runnable
 {
-  final static Pattern PATTERN = Pattern.compile("\\W+");
-
+  private final MessageSplitter splitter;
   private final String inputTopic;
   private final String outputTopic;
   private final KafkaConsumer<String, String> consumer;
@@ -43,10 +41,13 @@ public class SplitterStreamProcessor implements Runnable
   private long lastCommit;
 
   public SplitterStreamProcessor(
+      MessageSplitter splitter,
       SplitterApplicationProperties properties,
       Clock clock,
       TaskExecutor executor)
   {
+    this.splitter = splitter;
+
     this.inputTopic = properties.getInputTopic();
     this.outputTopic = properties.getOutputTopic();
 
@@ -106,7 +107,7 @@ public class SplitterStreamProcessor implements Runnable
           offsets[inputRecord.partition()] = inputRecord.offset();
           leaderEpochs[inputRecord.partition()] = inputRecord.leaderEpoch();
 
-          String[] words = PATTERN.split(inputRecord.value());
+          String[] words = splitter.split(inputRecord.value());
           for (int i = 0; i < words.length; i++)
           {
             ProducerRecord<String, String> outputRecord =
-- 
2.20.1