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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.persistence.influxdb;
  14
  15 import static org.openhab.persistence.influxdb.internal.InfluxDBConstants.*;
  16
  17 import java.time.Instant;
  18 import java.time.ZoneId;
  19 import java.time.ZonedDateTime;
  20 import java.util.ArrayList;
  21 import java.util.HashMap;
  22 import java.util.HashSet;
  23 import java.util.List;
  24 import java.util.Locale;
  25 import java.util.Map;
  26 import java.util.Objects;
  27 import java.util.Set;
  28 import java.util.concurrent.BlockingQueue;
  29 import java.util.concurrent.CompletableFuture;
  30 import java.util.concurrent.LinkedBlockingQueue;
  31 import java.util.concurrent.ScheduledFuture;
  32 import java.util.concurrent.TimeUnit;
  33 import java.util.stream.Collectors;
  34
  35 import org.eclipse.jdt.annotation.NonNullByDefault;
  36 import org.eclipse.jdt.annotation.Nullable;
  37 import org.openhab.core.common.ThreadPoolManager;
  38 import org.openhab.core.config.core.ConfigurableService;
  39 import org.openhab.core.items.Item;
  40 import org.openhab.core.items.ItemFactory;
  41 import org.openhab.core.items.ItemRegistry;
  42 import org.openhab.core.items.ItemUtil;
  43 import org.openhab.core.persistence.FilterCriteria;
  44 import org.openhab.core.persistence.HistoricItem;
  45 import org.openhab.core.persistence.ModifiablePersistenceService;
  46 import org.openhab.core.persistence.PersistenceItemInfo;
  47 import org.openhab.core.persistence.PersistenceService;
  48 import org.openhab.core.persistence.QueryablePersistenceService;
  49 import org.openhab.core.persistence.strategy.PersistenceStrategy;
  50 import org.openhab.core.types.State;
  51 import org.openhab.core.types.UnDefType;
  52 import org.openhab.persistence.influxdb.internal.FilterCriteriaQueryCreator;
  53 import org.openhab.persistence.influxdb.internal.InfluxDBConfiguration;
  54 import org.openhab.persistence.influxdb.internal.InfluxDBHistoricItem;
  55 import org.openhab.persistence.influxdb.internal.InfluxDBMetadataService;
  56 import org.openhab.persistence.influxdb.internal.InfluxDBPersistentItemInfo;
  57 import org.openhab.persistence.influxdb.internal.InfluxDBRepository;
  58 import org.openhab.persistence.influxdb.internal.InfluxDBStateConvertUtils;
  59 import org.openhab.persistence.influxdb.internal.InfluxPoint;
  60 import org.openhab.persistence.influxdb.internal.influx1.InfluxDB1RepositoryImpl;
  61 import org.openhab.persistence.influxdb.internal.influx2.InfluxDB2RepositoryImpl;
  62 import org.osgi.framework.Constants;
  63 import org.osgi.service.component.annotations.Activate;
  64 import org.osgi.service.component.annotations.Component;
  65 import org.osgi.service.component.annotations.Deactivate;
  66 import org.osgi.service.component.annotations.Reference;
  67 import org.osgi.service.component.annotations.ReferenceCardinality;
  68 import org.osgi.service.component.annotations.ReferencePolicy;
  69 import org.slf4j.Logger;
  70 import org.slf4j.LoggerFactory;
  71
  72 /**
  73  * This is the implementation of the InfluxDB {@link PersistenceService}. It
  74  * persists item values using the <a href="http://influxdb.org">InfluxDB</a> time
  75  * series database. The states ({@link State}) of an {@link Item} are persisted
  76  * by default in a time series with names equal to the name of the item.
  77  *
  78  * This addon supports 1.X and 2.X versions, as two versions are incompatible
  79  * and use different drivers the specific code for each version is accessed by
  80  * {@link InfluxDBRepository} and {@link FilterCriteriaQueryCreator} interfaces
  81  * and specific implementation reside in
  82  * {@link org.openhab.persistence.influxdb.internal.influx1} and
  83  * {@link org.openhab.persistence.influxdb.internal.influx2} packages
  84  *
  85  * @author Theo Weiss - Initial contribution, rewrite of
  86  *         org.openhab.persistence.influxdb
  87  * @author Joan Pujol Espinar - Addon rewrite refactoring code and adding
  88  *         support for InfluxDB 2.0. Some tag code is based from not integrated
  89  *         branch from Dominik Vorreiter
  90  */
  91 @NonNullByDefault
  92 @Component(service = { PersistenceService.class,
  93         QueryablePersistenceService.class }, configurationPid = "org.openhab.influxdb", //
  94         property = Constants.SERVICE_PID + "=org.openhab.influxdb")
  95 @ConfigurableService(category = "persistence", label = "InfluxDB Persistence Service", description_uri = InfluxDBPersistenceService.CONFIG_URI)
  96 public class InfluxDBPersistenceService implements ModifiablePersistenceService {
  97     public static final String SERVICE_NAME = "influxdb";
  98
  99     private final Logger logger = LoggerFactory.getLogger(InfluxDBPersistenceService.class);
 100
 101     private static final int COMMIT_INTERVAL = 3; // in s
 102     protected static final String CONFIG_URI = "persistence:influxdb";
 103
 104     // External dependencies
 105     private final ItemRegistry itemRegistry;
 106     private final InfluxDBMetadataService influxDBMetadataService;
 107
 108     private final InfluxDBConfiguration configuration;
 109     private final InfluxDBRepository influxDBRepository;
 110     private boolean serviceActivated;
 111
 112     // storage
 113     private final ScheduledFuture<?> storeJob;
 114     private final BlockingQueue<InfluxPoint> pointsQueue = new LinkedBlockingQueue<>();
 115
 116     // conversion
 117     private final Set<ItemFactory> itemFactories = new HashSet<>();
 118     private Map<String, Class<? extends State>> desiredClasses = new HashMap<>();
 119
 120     @Activate
 121     public InfluxDBPersistenceService(final @Reference ItemRegistry itemRegistry,
 122             final @Reference InfluxDBMetadataService influxDBMetadataService, Map<String, Object> config) {
 123         this.itemRegistry = itemRegistry;
 124         this.influxDBMetadataService = influxDBMetadataService;
 125         this.configuration = new InfluxDBConfiguration(config);
 126         if (configuration.isValid()) {
 127             this.influxDBRepository = createInfluxDBRepository();
 128             this.influxDBRepository.connect();
 129             this.storeJob = ThreadPoolManager.getScheduledPool("org.openhab.influxdb")
 130                     .scheduleWithFixedDelay(this::commit, COMMIT_INTERVAL, COMMIT_INTERVAL, TimeUnit.SECONDS);
 131             serviceActivated = true;
 132         } else {
 133             throw new IllegalArgumentException("Configuration invalid.");
 134         }
 135
 136         logger.info("InfluxDB persistence service started.");
 137     }
 138
 139     // Visible for testing
 140     protected InfluxDBRepository createInfluxDBRepository() throws IllegalArgumentException {
 141         return switch (configuration.getVersion()) {
 142             case V1 -> new InfluxDB1RepositoryImpl(configuration, influxDBMetadataService);
 143             case V2 -> new InfluxDB2RepositoryImpl(configuration, influxDBMetadataService);
 144             default -> throw new IllegalArgumentException("Failed to instantiate repository.");
 145         };
 146     }
 147
 148     /**
 149      * Disconnect from database when service is deactivated
 150      */
 151     @Deactivate
 152     public void deactivate() {
 153         serviceActivated = false;
 154
 155         storeJob.cancel(false);
 156         commit(); // ensure we at least tried to store the data;
 157
 158         if (!pointsQueue.isEmpty()) {
 159             logger.warn("InfluxDB failed to finally store {} points.", pointsQueue.size());
 160         }
 161
 162         influxDBRepository.disconnect();
 163         logger.info("InfluxDB persistence service stopped.");
 164     }
 165
 166     @Override
 167     public String getId() {
 168         return SERVICE_NAME;
 169     }
 170
 171     @Override
 172     public String getLabel(@Nullable Locale locale) {
 173         return "InfluxDB persistence layer";
 174     }
 175
 176     @Override
 177     public Set<PersistenceItemInfo> getItemInfo() {
 178         if (checkConnection()) {
 179             return influxDBRepository.getStoredItemsCount().entrySet().stream().map(InfluxDBPersistentItemInfo::new)
 180                     .collect(Collectors.toUnmodifiableSet());
 181         } else {
 182             logger.info("getItemInfo ignored, InfluxDB is not connected");
 183             return Set.of();
 184         }
 185     }
 186
 187     @Override
 188     public void store(Item item) {
 189         store(item, null);
 190     }
 191
 192     @Override
 193     public void store(Item item, @Nullable String alias) {
 194         store(item, ZonedDateTime.now(), item.getState(), alias);
 195     }
 196
 197     @Override
 198     public void store(Item item, ZonedDateTime date, State state) {
 199         store(item, date, state, null);
 200     }
 201
 202     public void store(Item item, ZonedDateTime date, State state, @Nullable String alias) {
 203         if (!serviceActivated) {
 204             logger.warn("InfluxDB service not ready. Storing {} rejected.", item);
 205             return;
 206         }
 207         convert(item, state, date.toInstant(), null).thenAccept(point -> {
 208             if (point == null) {
 209                 logger.trace("Ignoring item {}, conversion to an InfluxDB point failed.", item.getName());
 210                 return;
 211             }
 212             if (pointsQueue.offer(point)) {
 213                 logger.trace("Queued {} for item {}", point, item);
 214             } else {
 215                 logger.warn("Failed to queue {} for item {}", point, item);
 216             }
 217         });
 218     }
 219
 220     @Override
 221     public boolean remove(FilterCriteria filter) throws IllegalArgumentException {
 222         if (serviceActivated && checkConnection()) {
 223             if (filter.getItemName() == null) {
 224                 logger.warn("Item name is missing in filter {} when trying to remove data.", filter);
 225                 return false;
 226             }
 227             return influxDBRepository.remove(filter);
 228         } else {
 229             logger.debug("Remove query {} ignored, InfluxDB is not connected.", filter);
 230             return false;
 231         }
 232     }
 233
 234     @Override
 235     public Iterable<HistoricItem> query(FilterCriteria filter) {
 236         if (serviceActivated && checkConnection()) {
 237             logger.trace(
 238                     "Query-Filter: itemname: {}, ordering: {}, state: {},  operator: {}, getBeginDate: {}, getEndDate: {}, getPageSize: {}, getPageNumber: {}",
 239                     filter.getItemName(), filter.getOrdering().toString(), filter.getState(), filter.getOperator(),
 240                     filter.getBeginDate(), filter.getEndDate(), filter.getPageSize(), filter.getPageNumber());
 241             if (filter.getItemName() == null) {
 242                 logger.warn("Item name is missing in filter {} when querying data.", filter);
 243                 return List.of();
 244             }
 245
 246             List<InfluxDBRepository.InfluxRow> results = influxDBRepository.query(filter,
 247                     configuration.getRetentionPolicy());
 248             return results.stream().map(this::mapRowToHistoricItem).collect(Collectors.toList());
 249         } else {
 250             logger.debug("Query for persisted data ignored, InfluxDB is not connected");
 251             return List.of();
 252         }
 253     }
 254
 255     private HistoricItem mapRowToHistoricItem(InfluxDBRepository.InfluxRow row) {
 256         State state = InfluxDBStateConvertUtils.objectToState(row.value(), row.itemName(), itemRegistry);
 257         return new InfluxDBHistoricItem(row.itemName(), state,
 258                 ZonedDateTime.ofInstant(row.time(), ZoneId.systemDefault()));
 259     }
 260
 261     @Override
 262     public List<PersistenceStrategy> getDefaultStrategies() {
 263         return List.of(PersistenceStrategy.Globals.RESTORE, PersistenceStrategy.Globals.CHANGE);
 264     }
 265
 266     /**
 267      * check connection and try reconnect
 268      *
 269      * @return true if connected
 270      */
 271     private boolean checkConnection() {
 272         if (influxDBRepository.isConnected()) {
 273             return true;
 274         } else if (serviceActivated) {
 275             logger.debug("Connection lost, trying re-connection");
 276             return influxDBRepository.connect();
 277         }
 278         return false;
 279     }
 280
 281     private void commit() {
 282         if (!pointsQueue.isEmpty() && checkConnection()) {
 283             List<InfluxPoint> points = new ArrayList<>();
 284             pointsQueue.drainTo(points);
 285             if (!influxDBRepository.write(points)) {
 286                 logger.warn("Re-queuing {} elements, failed to write batch.", points.size());
 287                 pointsQueue.addAll(points);
 288             } else {
 289                 logger.trace("Wrote {} elements to database", points.size());
 290             }
 291         }
 292     }
 293
 294     /**
 295      * Convert incoming data to an {@link InfluxPoint} for further processing. This is needed because storage is
 296      * asynchronous and the item data may have changed.
 297      * <p />
 298      * The method is package-private for testing.
 299      *
 300      * @param item the {@link Item} that needs conversion
 301      * @param storeAlias an (optional) alias for the item
 302      * @return a {@link CompletableFuture} that contains either <code>null</code> for item states that cannot be
 303      *         converted or the corresponding {@link InfluxPoint}
 304      */
 305     CompletableFuture<@Nullable InfluxPoint> convert(Item item, State state, Instant timeStamp,
 306             @Nullable String storeAlias) {
 307         String itemName = item.getName();
 308         String itemLabel = item.getLabel();
 309         String category = item.getCategory();
 310         String itemType = item.getType();
 311
 312         if (state instanceof UnDefType) {
 313             return CompletableFuture.completedFuture(null);
 314         }
 315
 316         return CompletableFuture.supplyAsync(() -> {
 317             String measurementName = storeAlias != null && !storeAlias.isBlank() ? storeAlias : itemName;
 318             measurementName = influxDBMetadataService.getMeasurementNameOrDefault(itemName, measurementName);
 319
 320             if (configuration.isReplaceUnderscore()) {
 321                 measurementName = measurementName.replace('_', '.');
 322             }
 323
 324             State storeState = Objects
 325                     .requireNonNullElse(state.as(desiredClasses.get(ItemUtil.getMainItemType(itemType))), state);
 326             Object value = InfluxDBStateConvertUtils.stateToObject(storeState);
 327
 328             InfluxPoint.Builder pointBuilder = InfluxPoint.newBuilder(measurementName).withTime(timeStamp)
 329                     .withValue(value).withTag(TAG_ITEM_NAME, itemName);
 330
 331             if (configuration.isAddCategoryTag()) {
 332                 String categoryName = Objects.requireNonNullElse(category, "n/a");
 333                 pointBuilder.withTag(TAG_CATEGORY_NAME, categoryName);
 334             }
 335
 336             if (configuration.isAddTypeTag()) {
 337                 pointBuilder.withTag(TAG_TYPE_NAME, itemType);
 338             }
 339
 340             if (configuration.isAddLabelTag()) {
 341                 String labelName = Objects.requireNonNullElse(itemLabel, "n/a");
 342                 pointBuilder.withTag(TAG_LABEL_NAME, labelName);
 343             }
 344
 345             influxDBMetadataService.getMetaData(itemName)
 346                     .ifPresent(metadata -> metadata.getConfiguration().forEach(pointBuilder::withTag));
 347
 348             return pointBuilder.build();
 349         });
 350     }
 351
 352     @Reference(cardinality = ReferenceCardinality.AT_LEAST_ONE, policy = ReferencePolicy.DYNAMIC)
 353     public void setItemFactory(ItemFactory itemFactory) {
 354         itemFactories.add(itemFactory);
 355         calculateItemTypeClasses();
 356     }
 357
 358     public void unsetItemFactory(ItemFactory itemFactory) {
 359         itemFactories.remove(itemFactory);
 360         calculateItemTypeClasses();
 361     }
 362
 363     private synchronized void calculateItemTypeClasses() {
 364         Map<String, Class<? extends State>> desiredClasses = new HashMap<>();
 365         itemFactories.forEach(factory -> {
 366             for (String itemType : factory.getSupportedItemTypes()) {
 367                 Item item = factory.createItem(itemType, "influxItem");
 368                 if (item != null) {
 369                     item.getAcceptedCommandTypes().stream()
 370                             .filter(commandType -> commandType.isAssignableFrom(State.class)).findFirst()
 371                             .map(commandType -> (Class<? extends State>) commandType.asSubclass(State.class))
 372                             .ifPresent(desiredClass -> desiredClasses.put(itemType, desiredClass));
 373                 }
 374             }
 375         });
 376         this.desiredClasses = desiredClasses;
 377     }
 378 }