Fix the duplicate issue

src/main/java/io/antmedia/datastore/db/DataStore.java

@@ -52,7 +52,7 @@ public abstract class DataStore {
 
 	public abstract String save(Broadcast broadcast);
 
-	//In rare scenarios, streamId can not be unique 
+	//TODO: In rare scenarios, streamId can not be unique 
 	public Broadcast saveBroadcast(Broadcast broadcast) {
 		String streamId = null;
 		try {

src/main/java/io/antmedia/datastore/db/types/BroadcastUpdate.java

@@ -10,9 +10,11 @@
 
 /**
  * This is like a clone of Broadcast object. Just some differences, all default values are null in this object
- * and it is used to update the broadcast object in the datastore
+ * and it is used to update the broadcast object in the datastore by only changing fields. 
  * 
- * If it's not null, it means that it will be updated in the datastore
+ * If it a field is not null, it means that it should be updated in the datastore
+ * 
+ * It's not a good solution. It's a workaround so far that keeps the backward compatibility
  */
 @Schema(description="This is the BroadcastUpdate and it's almost same with BroadcastUpdate with all default values are null. We update the fields in update method if it's not null."
 		+ "It makes this data up to date in race conditions.")
@@ -287,26 +289,26 @@ public void setCategory(String category) {
 	public String getIpAddr() {
 		return ipAddr;
 	}
-
-	public void setIpAddr(String ipAddr) {
-		this.ipAddr = ipAddr;
+	
+	public void setUsername(String username) {
+		this.username = username;
 	}
-
+	
 	public String getUsername() {
 		return username;
 	}
-
-	public void setUsername(String username) {
-		this.username = username;
-	}
-
-	public String getPassword() {
-		return password;
+
+	public void setIpAddr(String ipAddr) {
+		this.ipAddr = ipAddr;
 	}
 
 	public void setPassword(String password) {
 		this.password = password;
 	}
+
+	public String getPassword() {
+		return password;
+	}
 
 	public String getQuality() {
 		return quality;
@@ -468,42 +470,42 @@ public void setBitrate(Long bitrate) {
 		this.bitrate = bitrate;
 	}
 
+	public void setUserAgent(String userAgent) {
+		this.userAgent = userAgent;
+	}
+
 	public String getUserAgent() {
 		return userAgent;
 	}
-
-	public void setUserAgent(String userAgent) {
-		this.userAgent = userAgent;
+	
+	public String getAltitude() {
+		return altitude;
 	}
 
 	public String getLatitude() {
 		return latitude;
 	}
 
-	public void setLatitude(String latitude) {
-		this.latitude = latitude;
-	}
-
 	public String getLongitude() {
 		return longitude;
 	}
+
+	public String getMainTrackStreamId() {
+		return mainTrackStreamId;
+	}
 
 	public void setLongitude(String longitude) {
 		this.longitude = longitude;
 	}
 
-	public String getAltitude() {
-		return altitude;
+	public void setLatitude(String latitude) {
+		this.latitude = latitude;
 	}
-
+	
 	public void setAltitude(String altitude) {
 		this.altitude = altitude;
 	}
 
-	public String getMainTrackStreamId() {
-		return mainTrackStreamId;
-	}
-
 	public void setMainTrackStreamId(String mainTrackStreamId) {
 		this.mainTrackStreamId = mainTrackStreamId;
 	}