Add PluggableDiscoveryMessage for BoardPort change metadata

Author: PaulStoffregen

arduino-core/src/cc/arduino/packages/discoverers/PluggableDiscovery.java

@@ -72,17 +72,17 @@ public void run() {
       mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
 
       while (program != null && program.isAlive()) {
-        BoardPort port = mapper.readValue(parser, BoardPort.class);
-        if (port != null) {
+        PluggableDiscoveryMessage msg = mapper.readValue(parser, PluggableDiscoveryMessage.class);
+        if (msg != null) {
           System.out.println(discoveryName + ": received json");
-          String address = port.getAddress();
-          if (address != null) {
-            if (address.equals("Error: START_SYNC not supported")) {
+          String event = msg.getEventType();
+          if (event != null) {
+            if (event.equals("Error: START_SYNC not supported")) {
               if (pollingThread == null) {
                 startPolling();
               }
             } else {
-              update(port);
+              update(msg);
             }
           }
         }
@@ -158,21 +158,22 @@ private void write(String command) {
     }
   }
 
-  private synchronized void update(BoardPort port) {
+  private synchronized void update(PluggableDiscoveryMessage port) {
     // Update the list of discovered ports, which may involve
     // adding a new port, replacing the info for a previously
     // discovered port, or removing a port.  This function
     // must be synchronized with listDiscoveredBoards(), to
     // avoid changing the list while it's being accessed by
     // another thread.
     String address = port.getAddress();
+    if (address == null) return; // address required for "add" & "remove"
     for (BoardPort bp : portList) {
       if (address.equals(bp.getAddress())) {
         // if address already on the list, discard old info
         portList.remove(bp);
       }
     }
-    if (port.isOnline()) {
+    if (port.getEventType().equals("add")) {
       if (port.getLabel() == null) {
         // if no label, use address
         port.setLabel(address);

arduino-core/src/cc/arduino/packages/discoverers/PluggableDiscoveryMessage.java

@@ -0,0 +1,39 @@
+/*
+ * This file is part of Arduino.
+ *
+ * Arduino is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2018 Arduino SA (http://www.arduino.cc/)
+ */
+
+package cc.arduino.packages.discoverers;
+import cc.arduino.packages.BoardPort;
+
+public class PluggableDiscoveryMessage extends BoardPort {
+  private String eventType; // "add", "remove", "Error: START_SYNC not supported"
+  public String getEventType() {
+    return eventType;
+  }
+}
+