Java tutorial
/* * 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 2013 Arduino LLC (http://www.arduino.cc/) */ package cc.arduino.packages.discoverers; import cc.arduino.packages.BoardPort; import cc.arduino.packages.Discovery; import cc.arduino.packages.discoverers.network.BoardReachabilityFilter; import cc.arduino.packages.discoverers.network.NetworkChecker; import org.apache.commons.compress.utils.IOUtils; import processing.app.BaseNoGui; import processing.app.zeroconf.jmdns.ArduinoDNSTaskStarter; import javax.jmdns.*; import javax.jmdns.impl.DNSTaskStarter; import java.io.IOException; import java.net.InetAddress; import java.util.*; public class NetworkDiscovery implements Discovery, ServiceListener, cc.arduino.packages.discoverers.network.NetworkTopologyListener { private static final int MAX_TIME_AWAITING_FOR_PACKAGES = 5000; private final List<BoardPort> boardPortsDiscoveredWithJmDNS; private final Map<InetAddress, JmDNS> mappedJmDNSs; private Timer networkCheckerTimer; private Timer boardReachabilityFilterTimer; private final List<BoardPort> reachableBoardPorts; public NetworkDiscovery() { DNSTaskStarter.Factory.setClassDelegate(new ArduinoDNSTaskStarter()); this.boardPortsDiscoveredWithJmDNS = new LinkedList<>(); this.mappedJmDNSs = new Hashtable<>(); this.reachableBoardPorts = new LinkedList<>(); } @Override public List<BoardPort> listDiscoveredBoards() { synchronized (reachableBoardPorts) { return new LinkedList<>(reachableBoardPorts); } } @Override public List<BoardPort> listDiscoveredBoards(boolean complete) { synchronized (reachableBoardPorts) { return new LinkedList<>(reachableBoardPorts); } } public void setReachableBoardPorts(List<BoardPort> newReachableBoardPorts) { synchronized (reachableBoardPorts) { this.reachableBoardPorts.clear(); this.reachableBoardPorts.addAll(newReachableBoardPorts); } } public List<BoardPort> getBoardPortsDiscoveredWithJmDNS() { synchronized (boardPortsDiscoveredWithJmDNS) { return new LinkedList<>(boardPortsDiscoveredWithJmDNS); } } @Override public void start() throws IOException { this.networkCheckerTimer = new Timer(NetworkChecker.class.getName()); new NetworkChecker(this, NetworkTopologyDiscovery.Factory.getInstance()).start(networkCheckerTimer); this.boardReachabilityFilterTimer = new Timer(BoardReachabilityFilter.class.getName()); new BoardReachabilityFilter(this).start(boardReachabilityFilterTimer); } @Override public void stop() throws IOException { this.networkCheckerTimer.purge(); this.boardReachabilityFilterTimer.purge(); // we don't close each JmDNS instance as it's too slow } @Override public void serviceAdded(ServiceEvent serviceEvent) { String type = serviceEvent.getType(); String name = serviceEvent.getName(); JmDNS dns = serviceEvent.getDNS(); dns.requestServiceInfo(type, name); ServiceInfo serviceInfo = dns.getServiceInfo(type, name); if (serviceInfo != null) { dns.requestServiceInfo(type, name); } } @Override public void serviceRemoved(ServiceEvent serviceEvent) { String name = serviceEvent.getName(); synchronized (boardPortsDiscoveredWithJmDNS) { boardPortsDiscoveredWithJmDNS.stream().filter(port -> port.getBoardName().equals(name)) .forEach(boardPortsDiscoveredWithJmDNS::remove); } } @Override public void serviceResolved(ServiceEvent serviceEvent) { int sleptFor = 0; while (BaseNoGui.packages == null && sleptFor <= MAX_TIME_AWAITING_FOR_PACKAGES) { try { Thread.sleep(1000); sleptFor += 1000; } catch (InterruptedException e) { e.printStackTrace(); } } ServiceInfo info = serviceEvent.getInfo(); for (InetAddress inetAddress : info.getInet4Addresses()) { String address = inetAddress.getHostAddress(); String name = serviceEvent.getName(); BoardPort port = new BoardPort(); String board = null; String description = null; if (info.hasData()) { board = info.getPropertyString("board"); description = info.getPropertyString("description"); port.getPrefs().put("board", board); port.getPrefs().put("distro_version", info.getPropertyString("distro_version")); port.getPrefs().put("port", "" + info.getPort()); //Add additional fields to permit generic ota updates //and make sure we do not intefere with Arduino boards // define "ssh_upload=no" TXT property to use generic uploader // define "tcp_check=no" TXT property if you are not using TCP // define "auth_upload=yes" TXT property if you want to use authenticated generic upload String useSSH = info.getPropertyString("ssh_upload"); String checkTCP = info.getPropertyString("tcp_check"); String useAuth = info.getPropertyString("auth_upload"); if (useSSH == null || !useSSH.contentEquals("no")) useSSH = "yes"; if (checkTCP == null || !checkTCP.contentEquals("no")) checkTCP = "yes"; if (useAuth == null || !useAuth.contentEquals("yes")) useAuth = "no"; port.getPrefs().put("ssh_upload", useSSH); port.getPrefs().put("tcp_check", checkTCP); port.getPrefs().put("auth_upload", useAuth); } String label = name + " at " + address; if (board != null && BaseNoGui.packages != null) { String boardName = BaseNoGui.getPlatform().resolveDeviceByBoardID(BaseNoGui.packages, board); if (boardName != null) { label += " (" + boardName + ")"; } } else if (description != null) { label += " (" + description + ")"; } port.setAddress(address); port.setBoardName(name); port.setProtocol("network"); port.setLabel(label); synchronized (boardPortsDiscoveredWithJmDNS) { removeDuplicateBoards(port); boardPortsDiscoveredWithJmDNS.add(port); } } } private void removeDuplicateBoards(BoardPort newBoard) { synchronized (boardPortsDiscoveredWithJmDNS) { Iterator<BoardPort> iterator = boardPortsDiscoveredWithJmDNS.iterator(); while (iterator.hasNext()) { BoardPort board = iterator.next(); if (newBoard.getAddress().equals(board.getAddress())) { iterator.remove(); } } } } @Override public void inetAddressAdded(InetAddress address) { if (mappedJmDNSs.containsKey(address)) { return; } try { JmDNS jmDNS = JmDNS.create(address); jmDNS.addServiceListener("_arduino._tcp.local.", this); mappedJmDNSs.put(address, jmDNS); } catch (Exception e) { e.printStackTrace(); } } @Override public void inetAddressRemoved(InetAddress address) { JmDNS jmDNS = mappedJmDNSs.remove(address); IOUtils.closeQuietly(jmDNS); } }