Added MessageStatusChangeEvent, moved MessageEvent back to envoy-client.

src/main/java/envoy/event/MessageEvent.java

@@ -1,30 +0,0 @@
-package envoy.event;
-
-import envoy.data.Message;
-
-/**
- * Project: <strong>envoy-common</strong><br>
- * File: <strong>MessageCreationEvent.java</strong><br>
- * Created: <strong>4 Dec 2019</strong><br>
- *
- * @author Kai S. K. Engelbart
- */
-public class MessageEvent implements Event<Message> {
-
-	/**
-	 * the {@link Message} attached to this {@link MessageEvent}.
-	 */
-	protected final Message message;
-
-	/**
-	 * Initializes a {@link MessageEvent} conveying information about a
-	 * {@link Message} object.
-	 *
-	 * @param message the {@link Message} object to attach to this event
-	 * @since Envoy v0.2-alpha
-	 */
-	public MessageEvent(Message message) { this.message = message; }
-
-	@Override
-	public Message get() { return message; }
-}

src/main/java/envoy/event/MessageStatusChangeEvent.java

@@ -0,0 +1,43 @@
+package envoy.event;
+
+import envoy.data.Message;
+
+/**
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>MessageStatusChangeEvent.java</strong><br>
+ * Created: <strong>6 Jan 2020</strong><br>
+ *
+ * @author Kai S. K. Engelbart
+ * @since Envoy Common v0.2-alpha
+ */
+public class MessageStatusChangeEvent implements Event<Message.MessageStatus> {
+
+	private final long					messageId;
+	private final Message.MessageStatus	messageStatus;
+
+	/**
+	 * Initializes a {@link MessageStatusChangeEvent}.
+	 *
+	 * @param messageId     the ID of the {@link Message} this event is related to
+	 * @param messageStatus the status of the {@link Message} this event is related
+	 *                      to
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public MessageStatusChangeEvent(long messageId, Message.MessageStatus messageStatus) {
+		this.messageId		= messageId;
+		this.messageStatus	= messageStatus;
+	}
+
+	/**
+	 * @return the status of the {@link Message} this event is related to
+	 * @since Envoy Common v0.2-alpha
+	 */
+	@Override
+	public Message.MessageStatus get() { return messageStatus; }
+
+	/**
+	 * @return the ID of the {@link Message} this event is related to
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public long getMessageId() { return messageId; }
+}