Log new video after publishing a new video

.gitignore

@@ -6,3 +6,6 @@ out/
 # Ignore Gradle GUI config
 gradle-app.setting
 
+# IntelliJ .idea folder
+.idea/
+

src/mooc/main/tv/codely/mooc/notification/application/create/NotifyOnVideoPublished.java

@@ -0,0 +1,27 @@
+package tv.codely.mooc.notification.application.create;
+
+import tv.codely.mooc.notification.domain.Notifier;
+import tv.codely.mooc.video.domain.VideoPublished;
+import tv.codely.shared.application.DomainEventSubscriber;
+
+public class NotifyOnVideoPublished implements DomainEventSubscriber<VideoPublished> {
+	private final Notifier notifier;
+
+	public NotifyOnVideoPublished(Notifier notifier) {
+		this.notifier = notifier;
+	}
+
+	@Override
+	public Class<VideoPublished> subscribedTo() {
+		return VideoPublished.class;
+	}
+
+	@Override
+	public void consume(VideoPublished event) {
+		notifier.notify(String.format(
+			"Hey! There is a new video with title <%s> and description <%s>",
+			event.title(),
+			event.description()
+		));
+	}
+}

src/mooc/main/tv/codely/mooc/notification/domain/Notifier.java

@@ -0,0 +1,5 @@
+package tv.codely.mooc.notification.domain;
+
+public interface Notifier {
+	void notify(String message);
+}

src/mooc/main/tv/codely/mooc/notification/infrastructure/FileHandlerCantBeCreated.java

@@ -0,0 +1,7 @@
+package tv.codely.mooc.notification.infrastructure;
+
+public class FileHandlerCantBeCreated extends RuntimeException {
+	FileHandlerCantBeCreated(String reason) {
+		super("Can't create file handler:\n" + reason);
+	}
+}

src/mooc/main/tv/codely/mooc/notification/infrastructure/LogNotifier.java

@@ -0,0 +1,26 @@
+package tv.codely.mooc.notification.infrastructure;
+
+import tv.codely.mooc.notification.domain.Notifier;
+
+import java.io.IOException;
+import java.util.logging.FileHandler;
+import java.util.logging.Logger;
+
+public class LogNotifier implements Notifier {
+	private final static Logger logger = Logger.getLogger(LogNotifier.class.getName());
+
+	public LogNotifier(String fileName) throws FileHandlerCantBeCreated {
+		try {
+			FileHandler fileHandler = new FileHandler(fileName, true);
+			logger.addHandler(fileHandler);
+		} catch (IOException e) {
+			throw new FileHandlerCantBeCreated(fileName);
+		}
+	}
+
+	@Override
+	public void notify(String text) {
+		logger.info(text);
+	}
+}
+