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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.fronius.internal.handler;
  14
  15 import java.util.HashSet;
  16 import java.util.Set;
  17 import java.util.concurrent.ScheduledFuture;
  18 import java.util.concurrent.TimeUnit;
  19
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.openhab.binding.fronius.internal.FroniusBridgeConfiguration;
  23 import org.openhab.binding.fronius.internal.FroniusCommunicationException;
  24 import org.openhab.binding.fronius.internal.FroniusHttpUtil;
  25 import org.openhab.core.thing.Bridge;
  26 import org.openhab.core.thing.ChannelUID;
  27 import org.openhab.core.thing.Thing;
  28 import org.openhab.core.thing.ThingStatus;
  29 import org.openhab.core.thing.ThingStatusDetail;
  30 import org.openhab.core.thing.binding.BaseBridgeHandler;
  31 import org.openhab.core.thing.binding.ThingHandler;
  32 import org.openhab.core.types.Command;
  33 import org.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 /**
  37  * Bridge for Fronius devices.
  38  *
  39  * @author Gerrit Beine - Initial contribution
  40  * @author Thomas Rokohl - Refactoring to merge the concepts.
  41  *         Check if host is reachable.
  42  * @author Jimmy Tanagra - Refactor the child services registration
  43  *         Refactor host online check
  44  */
  45 @NonNullByDefault
  46 public class FroniusBridgeHandler extends BaseBridgeHandler {
  47
  48     private final Logger logger = LoggerFactory.getLogger(FroniusBridgeHandler.class);
  49     private static final int DEFAULT_REFRESH_PERIOD = 10;
  50     private final Set<FroniusBaseThingHandler> services = new HashSet<>();
  51     private @Nullable ScheduledFuture<?> refreshJob;
  52
  53     public FroniusBridgeHandler(Bridge bridge) {
  54         super(bridge);
  55     }
  56
  57     @Override
  58     public void handleCommand(ChannelUID channelUID, Command command) {
  59     }
  60
  61     @Override
  62     public void initialize() {
  63         final FroniusBridgeConfiguration config = getConfigAs(FroniusBridgeConfiguration.class);
  64
  65         boolean validConfig = true;
  66         String errorMsg = null;
  67
  68         String hostname = config.hostname;
  69         if (hostname == null || hostname.isBlank()) {
  70             errorMsg = "Parameter 'hostname' is mandatory and must be configured";
  71             validConfig = false;
  72         }
  73
  74         if (config.refreshInterval != null && config.refreshInterval <= 0) {
  75             errorMsg = "Parameter 'refresh' must be at least 1 second";
  76             validConfig = false;
  77         }
  78
  79         if (validConfig) {
  80             startAutomaticRefresh();
  81         } else {
  82             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, errorMsg);
  83         }
  84     }
  85
  86     @Override
  87     public void dispose() {
  88         if (refreshJob != null) {
  89             refreshJob.cancel(true);
  90             refreshJob = null;
  91         }
  92     }
  93
  94     @Override
  95     public void childHandlerInitialized(ThingHandler childHandler, Thing childThing) {
  96         if (childHandler instanceof FroniusBaseThingHandler) {
  97             this.services.add((FroniusBaseThingHandler) childHandler);
  98             restartAutomaticRefresh();
  99         } else {
 100             logger.debug("Child handler {} not added because it is not an instance of FroniusBaseThingHandler",
 101                     childThing.getUID().getId());
 102         }
 103     }
 104
 105     @Override
 106     public void childHandlerDisposed(ThingHandler childHandler, Thing childThing) {
 107         this.services.remove((FroniusBaseThingHandler) childHandler);
 108     }
 109
 110     private void restartAutomaticRefresh() {
 111         if (refreshJob != null) { // refreshJob should be null if the config isn't valid
 112             refreshJob.cancel(false);
 113             startAutomaticRefresh();
 114         }
 115     }
 116
 117     /**
 118      * Start the job refreshing the data
 119      */
 120     private void startAutomaticRefresh() {
 121         if (refreshJob == null || refreshJob.isCancelled()) {
 122             final FroniusBridgeConfiguration config = getConfigAs(FroniusBridgeConfiguration.class);
 123             Runnable runnable = () -> {
 124                 try {
 125                     checkBridgeOnline(config);
 126                     if (getThing().getStatus() != ThingStatus.ONLINE) {
 127                         updateStatus(ThingStatus.ONLINE);
 128                     }
 129                     for (FroniusBaseThingHandler service : services) {
 130                         service.refresh(config);
 131                     }
 132                 } catch (FroniusCommunicationException e) {
 133                     updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.COMMUNICATION_ERROR, e.getMessage());
 134                 }
 135             };
 136
 137             int delay = (config.refreshInterval != null) ? config.refreshInterval.intValue() : DEFAULT_REFRESH_PERIOD;
 138             refreshJob = scheduler.scheduleWithFixedDelay(runnable, 1, delay, TimeUnit.SECONDS);
 139         }
 140     }
 141
 142     private void checkBridgeOnline(FroniusBridgeConfiguration config) throws FroniusCommunicationException {
 143         FroniusHttpUtil.executeUrl("http://" + config.hostname, 5000);
 144     }
 145 }