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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.lcn.internal.connection;
  14
  15 import java.util.concurrent.ScheduledFuture;
  16 import java.util.concurrent.TimeUnit;
  17
  18 import org.eclipse.jdt.annotation.NonNullByDefault;
  19 import org.eclipse.jdt.annotation.Nullable;
  20 import org.openhab.binding.lcn.internal.common.LcnDefs;
  21 import org.openhab.binding.lcn.internal.common.LcnException;
  22
  23 /**
  24  * This state waits for the status answer of the LCN-PCK gateway after connection establishment, rather the LCN bus is
  25  * connected.
  26  *
  27  * @author Fabian Wolter - Initial Contribution
  28  */
  29 @NonNullByDefault
  30 public class ConnectionStateWaitForLcnBusConnected extends AbstractConnectionState {
  31     private @Nullable ScheduledFuture<?> legacyTimer;
  32
  33     public ConnectionStateWaitForLcnBusConnected(ConnectionStateMachine context) {
  34         super(context);
  35     }
  36
  37     @Override
  38     public void startWorking() {
  39         // Legacy support for LCN-PCHK 2.2 and earlier:
  40         // There was no explicit "LCN connected" notification after successful authentication.
  41         // Only "LCN disconnected" would be reported immediately. That means "LCN connected" used to be the default.
  42         ScheduledFuture<?> localLegacyTimer = legacyTimer = getScheduler().schedule(() -> {
  43             connection.getCallback().onOnline();
  44             nextState(ConnectionStateSendDimMode::new);
  45         }, connection.getSettings().getTimeout(), TimeUnit.MILLISECONDS);
  46         addTimer(localLegacyTimer);
  47     }
  48
  49     @Override
  50     public void onPckMessageReceived(String data) {
  51         switch (data) {
  52             case LcnDefs.LCNCONNSTATE_DISCONNECTED:
  53                 cancelLegacyTimer();
  54                 connection.getCallback().onOffline("LCN-PCHK/VISU not connected to LCN data wire");
  55                 break;
  56             case LcnDefs.LCNCONNSTATE_CONNECTED:
  57                 cancelLegacyTimer();
  58                 connection.getCallback().onOnline();
  59                 nextState(ConnectionStateSendDimMode::new);
  60                 break;
  61             case LcnDefs.INSUFFICIENT_LICENSES:
  62                 cancelLegacyTimer();
  63                 handleConnectionFailed(
  64                         new LcnException("LCN-PCHK/VISU has not enough licenses to handle this connection"));
  65                 break;
  66         }
  67     }
  68
  69     private void cancelLegacyTimer() {
  70         ScheduledFuture<?> localLegacyTimer = legacyTimer;
  71         if (localLegacyTimer != null) {
  72             localLegacyTimer.cancel(true);
  73         }
  74     }
  75 }