#113 Event Driven Architecture

- added class diagram
- added more comments

event-driven-architecture/src/main/java/com/iluwatar/eda/framework/Channel.java

@@ -0,0 +1,9 @@
+package com.iluwatar.eda.framework;
+
+/**
+ * Channels are delivery points for messages.
+ * Every {@link Channel} is responsible for a single type of message
+ */
+public interface Channel<E extends Message> {
+    void dispatch(E message);
+}

event-driven-architecture/src/main/java/com/iluwatar/eda/framework/DynamicRouter.java

@@ -0,0 +1,11 @@
+package com.iluwatar.eda.framework;
+
+/**
+ * A {@link DynamicRouter} is responsible for selecting the proper path of a {@link Message}
+ * Messages can be associated to Channels through the registerChannel method and dispatched by calling
+ * the dispatch method.
+ */
+public interface DynamicRouter<E extends Message> {
+    void registerChannel(Class<? extends E> contentType, Channel channel);
+    void dispatch(E content);
+}

event-driven-architecture/src/main/java/com/iluwatar/eda/framework/Message.java

@@ -0,0 +1,9 @@
+package com.iluwatar.eda.framework;
+
+/**
+ * A {@link Message} is an object with a specific type that is associated to a
+ * specific {@link Channel}
+ */
+public interface Message {
+    Class<? extends Message> getType();
+}