file watch

.gitignore

@@ -1,3 +1,4 @@
+out/
 build
 classes
 .DS_Store

src/main/java/me/hatter/sample/Application.java

@@ -3,7 +3,9 @@ package me.hatter.sample;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.ComponentScan;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
+@EnableScheduling
 @ComponentScan(basePackages = "me.hatter.sample")
 @SpringBootApplication
 public class Application {

src/main/java/me/hatter/sample/common/misc/WatchFolder.java

@@ -0,0 +1,31 @@
+package me.hatter.sample.common.misc;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.*;
+
+public class WatchFolder {
+    public static void main(String[] args) throws IOException {
+        WatchService watchService = FileSystems.getDefault().newWatchService();
+        Path directory = new File(".").toPath();
+
+        WatchKey watchKey = directory.register(watchService,
+                StandardWatchEventKinds.ENTRY_CREATE,
+                StandardWatchEventKinds.ENTRY_MODIFY,
+                StandardWatchEventKinds.ENTRY_DELETE
+        );
+        while (true) {
+            for (WatchEvent<?> event : watchKey.pollEvents()) {
+                WatchEvent<Path> pathEvent = (WatchEvent<Path>) event;
+                Path fileName = pathEvent.context();
+                WatchEvent.Kind<?> kind = event.kind();
+
+                System.out.println("[WatchFolder] " + kind + ", " + fileName);
+            }
+            boolean valid = watchKey.reset();
+            if (!valid) {
+                break;
+            }
+        }
+    }
+}

src/main/java/me/hatter/sample/common/schedule/CustomScheduler.java

@@ -0,0 +1,16 @@
+package me.hatter.sample.common.schedule;
+
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+import java.time.LocalTime;
+import java.time.format.DateTimeFormatter;
+
+@Component
+public class CustomScheduler {
+    @Scheduled(cron = "0/5 * * * * *")
+    public void run() {
+        System.out.println("[CustomScheduler] Time now is : "
+                + LocalTime.now().format(DateTimeFormatter.ofPattern("hh mm ss")));
+    }
+}