rename akka-docs dir to docs (#62)

docs/src/test/java/jdocs/cluster/StatsWorker.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2018-2022 Lightbend Inc. <https://www.lightbend.com>
+ */
+
+package jdocs.cluster;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.pekko.actor.AbstractActor;
+
+// #worker
+public class StatsWorker extends AbstractActor {
+
+  Map<String, Integer> cache = new HashMap<String, Integer>();
+
+  @Override
+  public Receive createReceive() {
+    return receiveBuilder()
+        .match(
+            String.class,
+            word -> {
+              Integer length = cache.get(word);
+              if (length == null) {
+                length = word.length();
+                cache.put(word, length);
+              }
+              getSender().tell(length, getSelf());
+            })
+        .build();
+  }
+}
+// #worker