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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.rrd4j.internal;
  14
  15 import java.io.IOException;
  16 import java.nio.file.Files;
  17 import java.nio.file.Path;
  18 import java.time.Instant;
  19 import java.time.ZoneId;
  20 import java.time.ZonedDateTime;
  21 import java.util.ArrayList;
  22 import java.util.Collections;
  23 import java.util.HashMap;
  24 import java.util.Iterator;
  25 import java.util.List;
  26 import java.util.Locale;
  27 import java.util.Map;
  28 import java.util.Set;
  29 import java.util.concurrent.ConcurrentHashMap;
  30 import java.util.concurrent.Executors;
  31 import java.util.concurrent.RejectedExecutionException;
  32 import java.util.concurrent.ScheduledExecutorService;
  33 import java.util.concurrent.ScheduledFuture;
  34 import java.util.concurrent.TimeUnit;
  35
  36 import javax.measure.Quantity;
  37 import javax.measure.Unit;
  38
  39 import org.eclipse.jdt.annotation.NonNullByDefault;
  40 import org.eclipse.jdt.annotation.Nullable;
  41 import org.openhab.core.OpenHAB;
  42 import org.openhab.core.common.NamedThreadFactory;
  43 import org.openhab.core.items.GroupItem;
  44 import org.openhab.core.items.Item;
  45 import org.openhab.core.items.ItemNotFoundException;
  46 import org.openhab.core.items.ItemRegistry;
  47 import org.openhab.core.items.ItemUtil;
  48 import org.openhab.core.library.CoreItemFactory;
  49 import org.openhab.core.library.items.ColorItem;
  50 import org.openhab.core.library.items.ContactItem;
  51 import org.openhab.core.library.items.DimmerItem;
  52 import org.openhab.core.library.items.NumberItem;
  53 import org.openhab.core.library.items.RollershutterItem;
  54 import org.openhab.core.library.items.SwitchItem;
  55 import org.openhab.core.library.types.DecimalType;
  56 import org.openhab.core.library.types.OnOffType;
  57 import org.openhab.core.library.types.OpenClosedType;
  58 import org.openhab.core.library.types.PercentType;
  59 import org.openhab.core.library.types.QuantityType;
  60 import org.openhab.core.persistence.FilterCriteria;
  61 import org.openhab.core.persistence.FilterCriteria.Ordering;
  62 import org.openhab.core.persistence.HistoricItem;
  63 import org.openhab.core.persistence.PersistenceItemInfo;
  64 import org.openhab.core.persistence.PersistenceService;
  65 import org.openhab.core.persistence.QueryablePersistenceService;
  66 import org.openhab.core.persistence.strategy.PersistenceCronStrategy;
  67 import org.openhab.core.persistence.strategy.PersistenceStrategy;
  68 import org.openhab.core.types.State;
  69 import org.osgi.service.component.annotations.Activate;
  70 import org.osgi.service.component.annotations.Component;
  71 import org.osgi.service.component.annotations.ConfigurationPolicy;
  72 import org.osgi.service.component.annotations.Modified;
  73 import org.osgi.service.component.annotations.Reference;
  74 import org.rrd4j.ConsolFun;
  75 import org.rrd4j.DsType;
  76 import org.rrd4j.core.FetchData;
  77 import org.rrd4j.core.FetchRequest;
  78 import org.rrd4j.core.RrdDb;
  79 import org.rrd4j.core.RrdDb.Builder;
  80 import org.rrd4j.core.RrdDbPool;
  81 import org.rrd4j.core.RrdDef;
  82 import org.rrd4j.core.Sample;
  83 import org.slf4j.Logger;
  84 import org.slf4j.LoggerFactory;
  85
  86 /**
  87  * This is the implementation of the RRD4j {@link PersistenceService}. To learn
  88  * more about RRD4j please visit their
  89  * <a href="https://github.com/rrd4j/rrd4j">website</a>.
  90  *
  91  * @author Kai Kreuzer - Initial contribution
  92  * @author Jan N. Klug - some improvements
  93  * @author Karel Goderis - remove TimerThread dependency
  94  */
  95 @NonNullByDefault
  96 @Component(service = { PersistenceService.class,
  97         QueryablePersistenceService.class }, configurationPid = "org.openhab.rrd4j", configurationPolicy = ConfigurationPolicy.OPTIONAL)
  98 public class RRD4jPersistenceService implements QueryablePersistenceService {
  99
 100     private static final String DEFAULT_OTHER = "default_other";
 101     private static final String DEFAULT_NUMERIC = "default_numeric";
 102     private static final String DEFAULT_QUANTIFIABLE = "default_quantifiable";
 103
 104     private static final Set<String> SUPPORTED_TYPES = Set.of(CoreItemFactory.SWITCH, CoreItemFactory.CONTACT,
 105             CoreItemFactory.DIMMER, CoreItemFactory.NUMBER, CoreItemFactory.ROLLERSHUTTER, CoreItemFactory.COLOR);
 106
 107     private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(3,
 108             new NamedThreadFactory("RRD4j"));
 109
 110     private final Map<String, RrdDefConfig> rrdDefs = new ConcurrentHashMap<>();
 111
 112     private static final String DATASOURCE_STATE = "state";
 113
 114     private static final Path DB_FOLDER = Path.of(OpenHAB.getUserDataFolder(), "persistence", "rrd4j").toAbsolutePath();
 115
 116     private static final RrdDbPool DATABASE_POOL = new RrdDbPool();
 117
 118     private final Logger logger = LoggerFactory.getLogger(RRD4jPersistenceService.class);
 119
 120     private final Map<String, ScheduledFuture<?>> scheduledJobs = new HashMap<>();
 121
 122     private final ItemRegistry itemRegistry;
 123
 124     public static Path getDatabasePath(String name) {
 125         return DB_FOLDER.resolve(name + ".rrd");
 126     }
 127
 128     public static RrdDbPool getDatabasePool() {
 129         return DATABASE_POOL;
 130     }
 131
 132     @Activate
 133     public RRD4jPersistenceService(final @Reference ItemRegistry itemRegistry) {
 134         this.itemRegistry = itemRegistry;
 135     }
 136
 137     @Override
 138     public String getId() {
 139         return "rrd4j";
 140     }
 141
 142     @Override
 143     public String getLabel(@Nullable Locale locale) {
 144         return "RRD4j";
 145     }
 146
 147     @Override
 148     public synchronized void store(final Item item, @Nullable final String alias) {
 149         if (!isSupportedItemType(item)) {
 150             logger.trace("Ignoring item '{}' since its type {} is not supported", item.getName(), item.getType());
 151             return;
 152         }
 153         final String name = alias == null ? item.getName() : alias;
 154
 155         RrdDb db = null;
 156         try {
 157             db = getDB(name);
 158         } catch (Exception e) {
 159             logger.warn("Failed to open rrd4j database '{}' to store data ({})", name, e.toString());
 160         }
 161         if (db == null) {
 162             return;
 163         }
 164
 165         ConsolFun function = getConsolidationFunction(db);
 166         long now = System.currentTimeMillis() / 1000;
 167         if (function != ConsolFun.AVERAGE) {
 168             try {
 169                 // we store the last value again, so that the value change
 170                 // in the database is not interpolated, but
 171                 // happens right at this spot
 172                 if (now - 1 > db.getLastUpdateTime()) {
 173                     // only do it if there is not already a value
 174                     double lastValue = db.getLastDatasourceValue(DATASOURCE_STATE);
 175                     if (!Double.isNaN(lastValue)) {
 176                         Sample sample = db.createSample();
 177                         sample.setTime(now - 1);
 178                         sample.setValue(DATASOURCE_STATE, lastValue);
 179                         sample.update();
 180                         logger.debug("Stored '{}' as value '{}' in rrd4j database (again)", name, lastValue);
 181                     }
 182                 }
 183             } catch (IOException e) {
 184                 logger.debug("Error storing last value (again): {}", e.getMessage());
 185             }
 186         }
 187         try {
 188             Sample sample = db.createSample();
 189             sample.setTime(now);
 190
 191             Double value = null;
 192
 193             if (item instanceof NumberItem && item.getState() instanceof QuantityType) {
 194                 NumberItem nItem = (NumberItem) item;
 195                 QuantityType<?> qState = (QuantityType<?>) item.getState();
 196                 Unit<? extends Quantity<?>> unit = nItem.getUnit();
 197                 if (unit != null) {
 198                     QuantityType<?> convertedState = qState.toUnit(unit);
 199                     if (convertedState != null) {
 200                         value = convertedState.doubleValue();
 201                     } else {
 202                         logger.warn(
 203                                 "Failed to convert state '{}' to unit '{}'. Please check your item definition for correctness.",
 204                                 qState, unit);
 205                     }
 206                 } else {
 207                     value = qState.doubleValue();
 208                 }
 209             } else {
 210                 DecimalType state = item.getStateAs(DecimalType.class);
 211                 if (state != null) {
 212                     value = state.toBigDecimal().doubleValue();
 213                 }
 214             }
 215             if (value != null) {
 216                 if (db.getDatasource(DATASOURCE_STATE).getType() == DsType.COUNTER) { // counter values must be
 217                                                                                       // adjusted by stepsize
 218                     value = value * db.getRrdDef().getStep();
 219                 }
 220                 sample.setValue(DATASOURCE_STATE, value);
 221                 sample.update();
 222                 logger.debug("Stored '{}' as value '{}' in rrd4j database", name, value);
 223             }
 224         } catch (IllegalArgumentException e) {
 225             String message = e.getMessage();
 226             if (message != null && message.contains("at least one second step is required")) {
 227                 // we try to store the value one second later
 228                 ScheduledFuture<?> job = scheduledJobs.get(name);
 229                 if (job != null) {
 230                     job.cancel(true);
 231                     scheduledJobs.remove(name);
 232                 }
 233                 job = scheduler.schedule(() -> store(item, name), 1, TimeUnit.SECONDS);
 234                 scheduledJobs.put(name, job);
 235             } else {
 236                 logger.warn("Could not persist '{}' to rrd4j database: {}", name, e.getMessage());
 237             }
 238         } catch (Exception e) {
 239             logger.warn("Could not persist '{}' to rrd4j database: {}", name, e.getMessage());
 240         }
 241         try {
 242             db.close();
 243         } catch (IOException e) {
 244             logger.debug("Error closing rrd4j database: {}", e.getMessage());
 245         }
 246     }
 247
 248     @Override
 249     public void store(Item item) {
 250         store(item, null);
 251     }
 252
 253     @Override
 254     public Iterable<HistoricItem> query(FilterCriteria filter) {
 255         String itemName = filter.getItemName();
 256
 257         RrdDb db = null;
 258         try {
 259             db = getDB(itemName);
 260         } catch (Exception e) {
 261             logger.warn("Failed to open rrd4j database '{}' for querying ({})", itemName, e.toString());
 262             return List.of();
 263         }
 264         if (db == null) {
 265             logger.debug("Could not find item '{}' in rrd4j database", itemName);
 266             return List.of();
 267         }
 268
 269         Item item = null;
 270         Unit<?> unit = null;
 271         try {
 272             item = itemRegistry.getItem(itemName);
 273             if (item instanceof NumberItem) {
 274                 // we already retrieve the unit here once as it is a very costly operation,
 275                 // see https://github.com/openhab/openhab-addons/issues/8928
 276                 unit = ((NumberItem) item).getUnit();
 277             }
 278         } catch (ItemNotFoundException e) {
 279             logger.debug("Could not find item '{}' in registry", itemName);
 280         }
 281
 282         long start = 0L;
 283         long end = filter.getEndDate() == null ? System.currentTimeMillis() / 1000
 284                 : filter.getEndDate().toInstant().getEpochSecond();
 285
 286         try {
 287             if (filter.getBeginDate() == null) {
 288                 // as rrd goes back for years and gets more and more
 289                 // inaccurate, we only support descending order
 290                 // and a single return value
 291                 // if there is no begin date is given - this case is
 292                 // required specifically for the historicState()
 293                 // query, which we want to support
 294                 if (filter.getOrdering() == Ordering.DESCENDING && filter.getPageSize() == 1
 295                         && filter.getPageNumber() == 0) {
 296                     if (filter.getEndDate() == null) {
 297                         // we are asked only for the most recent value!
 298                         double lastValue = db.getLastDatasourceValue(DATASOURCE_STATE);
 299                         if (!Double.isNaN(lastValue)) {
 300                             HistoricItem rrd4jItem = new RRD4jItem(itemName, mapToState(lastValue, item, unit),
 301                                     ZonedDateTime.ofInstant(Instant.ofEpochMilli(db.getLastArchiveUpdateTime() * 1000),
 302                                             ZoneId.systemDefault()));
 303                             return List.of(rrd4jItem);
 304                         } else {
 305                             return List.of();
 306                         }
 307                     } else {
 308                         start = end;
 309                     }
 310                 } else {
 311                     throw new UnsupportedOperationException("rrd4j does not allow querys without a begin date, "
 312                             + "unless order is descending and a single value is requested");
 313                 }
 314             } else {
 315                 start = filter.getBeginDate().toInstant().getEpochSecond();
 316             }
 317
 318             FetchRequest request = db.createFetchRequest(getConsolidationFunction(db), start, end, 1);
 319             FetchData result = request.fetchData();
 320
 321             List<HistoricItem> items = new ArrayList<>();
 322             long ts = result.getFirstTimestamp();
 323             long step = result.getRowCount() > 1 ? result.getStep() : 0;
 324             for (double value : result.getValues(DATASOURCE_STATE)) {
 325                 if (!Double.isNaN(value) && (((ts >= start) && (ts <= end)) || (start == end))) {
 326                     RRD4jItem rrd4jItem = new RRD4jItem(itemName, mapToState(value, item, unit),
 327                             ZonedDateTime.ofInstant(Instant.ofEpochSecond(ts), ZoneId.systemDefault()));
 328                     items.add(rrd4jItem);
 329                 }
 330                 ts += step;
 331             }
 332             return items;
 333         } catch (IOException e) {
 334             logger.warn("Could not query rrd4j database for item '{}': {}", itemName, e.getMessage());
 335             return List.of();
 336         } finally {
 337             try {
 338                 db.close();
 339             } catch (IOException e) {
 340                 logger.debug("Error closing rrd4j database: {}", e.getMessage());
 341             }
 342         }
 343     }
 344
 345     @Override
 346     public Set<PersistenceItemInfo> getItemInfo() {
 347         return Set.of();
 348     }
 349
 350     protected synchronized @Nullable RrdDb getDB(String alias) {
 351         RrdDb db = null;
 352         Path path = getDatabasePath(alias);
 353         try {
 354             Builder builder = RrdDb.getBuilder();
 355             builder.setPool(DATABASE_POOL);
 356
 357             if (Files.exists(path)) {
 358                 // recreate the RrdDb instance from the file
 359                 builder.setPath(path.toString());
 360                 db = builder.build();
 361             } else {
 362                 if (!Files.exists(DB_FOLDER)) {
 363                     Files.createDirectories(DB_FOLDER);
 364                 }
 365                 RrdDef rrdDef = getRrdDef(alias, path);
 366                 if (rrdDef != null) {
 367                     // create a new database file
 368                     builder.setRrdDef(rrdDef);
 369                     db = builder.build();
 370                 } else {
 371                     logger.debug(
 372                             "Did not create rrd4j database for item '{}' since no rrd definition could be determined. This is likely due to an unsupported item type.",
 373                             alias);
 374                 }
 375             }
 376         } catch (IOException e) {
 377             logger.error("Could not create rrd4j database file '{}': {}", path, e.getMessage());
 378         } catch (RejectedExecutionException e) {
 379             // this happens if the system is shut down
 380             logger.debug("Could not create rrd4j database file '{}': {}", path, e.getMessage());
 381         }
 382         return db;
 383     }
 384
 385     private @Nullable RrdDefConfig getRrdDefConfig(String itemName) {
 386         RrdDefConfig useRdc = null;
 387         for (Map.Entry<String, RrdDefConfig> e : rrdDefs.entrySet()) {
 388             // try to find special config
 389             RrdDefConfig rdc = e.getValue();
 390             if (rdc.appliesTo(itemName)) {
 391                 useRdc = rdc;
 392                 break;
 393             }
 394         }
 395         if (useRdc == null) { // not defined, use defaults
 396             try {
 397                 Item item = itemRegistry.getItem(itemName);
 398                 if (!isSupportedItemType(item)) {
 399                     return null;
 400                 }
 401                 if (item instanceof NumberItem) {
 402                     NumberItem numberItem = (NumberItem) item;
 403                     useRdc = numberItem.getDimension() != null ? rrdDefs.get(DEFAULT_QUANTIFIABLE)
 404                             : rrdDefs.get(DEFAULT_NUMERIC);
 405                 } else {
 406                     useRdc = rrdDefs.get(DEFAULT_OTHER);
 407                 }
 408             } catch (ItemNotFoundException e) {
 409                 logger.debug("Could not find item '{}' in registry", itemName);
 410                 return null;
 411             }
 412         }
 413         logger.trace("Using rrd definition '{}' for item '{}'.", useRdc, itemName);
 414         return useRdc;
 415     }
 416
 417     private @Nullable RrdDef getRrdDef(String itemName, Path path) {
 418         RrdDef rrdDef = new RrdDef(path.toString());
 419         RrdDefConfig useRdc = getRrdDefConfig(itemName);
 420         if (useRdc != null) {
 421             rrdDef.setStep(useRdc.step);
 422             rrdDef.setStartTime(System.currentTimeMillis() / 1000 - 1);
 423             rrdDef.addDatasource(DATASOURCE_STATE, useRdc.dsType, useRdc.heartbeat, useRdc.min, useRdc.max);
 424             for (RrdArchiveDef rad : useRdc.archives) {
 425                 rrdDef.addArchive(rad.fcn, rad.xff, rad.steps, rad.rows);
 426             }
 427             return rrdDef;
 428         } else {
 429             return null;
 430         }
 431     }
 432
 433     public ConsolFun getConsolidationFunction(RrdDb db) {
 434         try {
 435             return db.getRrdDef().getArcDefs()[0].getConsolFun();
 436         } catch (IOException e) {
 437             return ConsolFun.MAX;
 438         }
 439     }
 440
 441     @SuppressWarnings({ "unchecked", "rawtypes" })
 442     private State mapToState(double value, @Nullable Item item, @Nullable Unit unit) {
 443         if (item instanceof GroupItem) {
 444             item = ((GroupItem) item).getBaseItem();
 445         }
 446
 447         if (item instanceof SwitchItem && !(item instanceof DimmerItem)) {
 448             return value == 0.0d ? OnOffType.OFF : OnOffType.ON;
 449         } else if (item instanceof ContactItem) {
 450             return value == 0.0d ? OpenClosedType.CLOSED : OpenClosedType.OPEN;
 451         } else if (item instanceof DimmerItem || item instanceof RollershutterItem || item instanceof ColorItem) {
 452             // make sure Items that need PercentTypes instead of DecimalTypes do receive the right information
 453             return new PercentType((int) Math.round(value * 100));
 454         } else if (item instanceof NumberItem) {
 455             if (unit != null) {
 456                 return new QuantityType(value, unit);
 457             }
 458         }
 459         return new DecimalType(value);
 460     }
 461
 462     private boolean isSupportedItemType(Item item) {
 463         if (item instanceof GroupItem) {
 464             final Item baseItem = ((GroupItem) item).getBaseItem();
 465             if (baseItem != null) {
 466                 item = baseItem;
 467             }
 468         }
 469
 470         return SUPPORTED_TYPES.contains(ItemUtil.getMainItemType(item.getType()));
 471     }
 472
 473     @Activate
 474     protected void activate(final Map<String, Object> config) {
 475         modified(config);
 476     }
 477
 478     @Modified
 479     protected void modified(final Map<String, Object> config) {
 480         // clean existing definitions
 481         rrdDefs.clear();
 482
 483         // add default configurations
 484
 485         RrdDefConfig defaultNumeric = new RrdDefConfig(DEFAULT_NUMERIC);
 486         // use 10 seconds as a step size for numeric values and allow a 10 minute silence between updates
 487         defaultNumeric.setDef("GAUGE,600,U,U,10");
 488         // define 5 different boxes:
 489         // 1. granularity of 10s for the last hour
 490         // 2. granularity of 1m for the last week
 491         // 3. granularity of 15m for the last year
 492         // 4. granularity of 1h for the last 5 years
 493         // 5. granularity of 1d for the last 10 years
 494         defaultNumeric
 495                 .addArchives("LAST,0.5,1,360:LAST,0.5,6,10080:LAST,0.5,90,36500:LAST,0.5,360,43800:LAST,0.5,8640,3650");
 496         rrdDefs.put(DEFAULT_NUMERIC, defaultNumeric);
 497
 498         RrdDefConfig defaultQuantifiable = new RrdDefConfig(DEFAULT_QUANTIFIABLE);
 499         // use 10 seconds as a step size for numeric values and allow a 10 minute silence between updates
 500         defaultQuantifiable.setDef("GAUGE,600,U,U,10");
 501         // define 5 different boxes:
 502         // 1. granularity of 10s for the last hour
 503         // 2. granularity of 1m for the last week
 504         // 3. granularity of 15m for the last year
 505         // 4. granularity of 1h for the last 5 years
 506         // 5. granularity of 1d for the last 10 years
 507         defaultQuantifiable.addArchives(
 508                 "AVERAGE,0.5,1,360:AVERAGE,0.5,6,10080:AVERAGE,0.5,90,36500:AVERAGE,0.5,360,43800:AVERAGE,0.5,8640,3650");
 509         rrdDefs.put(DEFAULT_QUANTIFIABLE, defaultQuantifiable);
 510
 511         RrdDefConfig defaultOther = new RrdDefConfig(DEFAULT_OTHER);
 512         // use 5 seconds as a step size for discrete values and allow a 1h silence between updates
 513         defaultOther.setDef("GAUGE,3600,U,U,5");
 514         // define 4 different boxes:
 515         // 1. granularity of 5s for the last hour
 516         // 2. granularity of 1m for the last week
 517         // 3. granularity of 15m for the last year
 518         // 4. granularity of 4h for the last 10 years
 519         defaultOther.addArchives("LAST,0.5,1,720:LAST,0.5,12,10080:LAST,0.5,180,35040:LAST,0.5,2880,21900");
 520         rrdDefs.put(DEFAULT_OTHER, defaultOther);
 521
 522         if (config.isEmpty()) {
 523             logger.debug("using default configuration only");
 524             return;
 525         }
 526
 527         Iterator<String> keys = config.keySet().iterator();
 528         while (keys.hasNext()) {
 529             String key = keys.next();
 530
 531             if ("service.pid".equals(key) || "component.name".equals(key)) {
 532                 // ignore service.pid and name
 533                 continue;
 534             }
 535
 536             String[] subkeys = key.split("\\.");
 537             if (subkeys.length != 2) {
 538                 logger.debug("config '{}' should have the format 'name.configkey'", key);
 539                 continue;
 540             }
 541
 542             Object v = config.get(key);
 543             if (v instanceof String) {
 544                 String value = (String) v;
 545                 String name = subkeys[0].toLowerCase();
 546                 String property = subkeys[1].toLowerCase();
 547
 548                 if (value.isBlank()) {
 549                     logger.trace("Config is empty: {}", property);
 550                     continue;
 551                 } else {
 552                     logger.trace("Processing config: {} = {}", property, value);
 553                 }
 554
 555                 RrdDefConfig rrdDef = rrdDefs.get(name);
 556                 if (rrdDef == null) {
 557                     rrdDef = new RrdDefConfig(name);
 558                     rrdDefs.put(name, rrdDef);
 559                 }
 560
 561                 try {
 562                     if ("def".equals(property)) {
 563                         rrdDef.setDef(value);
 564                     } else if ("archives".equals(property)) {
 565                         rrdDef.addArchives(value);
 566                     } else if ("items".equals(property)) {
 567                         rrdDef.addItems(value);
 568                     } else {
 569                         logger.debug("Unknown property {} : {}", property, value);
 570                     }
 571                 } catch (IllegalArgumentException e) {
 572                     logger.warn("Ignoring illegal configuration: {}", e.getMessage());
 573                 }
 574             }
 575         }
 576
 577         for (RrdDefConfig rrdDef : rrdDefs.values()) {
 578             if (rrdDef.isValid()) {
 579                 logger.debug("Created {}", rrdDef);
 580             } else {
 581                 logger.info("Removing invalid definition {}", rrdDef);
 582                 rrdDefs.remove(rrdDef.name);
 583             }
 584         }
 585     }
 586
 587     private static class RrdArchiveDef {
 588         public @Nullable ConsolFun fcn;
 589         public double xff;
 590         public int steps, rows;
 591
 592         @Override
 593         public String toString() {
 594             StringBuilder sb = new StringBuilder(" " + fcn);
 595             sb.append(" xff = ").append(xff);
 596             sb.append(" steps = ").append(steps);
 597             sb.append(" rows = ").append(rows);
 598             return sb.toString();
 599         }
 600     }
 601
 602     private class RrdDefConfig {
 603         public String name;
 604         public @Nullable DsType dsType;
 605         public int heartbeat, step;
 606         public double min, max;
 607         public List<RrdArchiveDef> archives;
 608         public List<String> itemNames;
 609
 610         private boolean isInitialized;
 611
 612         public RrdDefConfig(String name) {
 613             this.name = name;
 614             archives = new ArrayList<>();
 615             itemNames = new ArrayList<>();
 616             isInitialized = false;
 617         }
 618
 619         public void setDef(String defString) {
 620             String[] opts = defString.split(",");
 621             if (opts.length != 5) { // check if correct number of parameters
 622                 logger.warn("invalid number of parameters {}: {}", name, defString);
 623                 return;
 624             }
 625
 626             if ("ABSOLUTE".equals(opts[0])) { // dsType
 627                 dsType = DsType.ABSOLUTE;
 628             } else if ("COUNTER".equals(opts[0])) {
 629                 dsType = DsType.COUNTER;
 630             } else if ("DERIVE".equals(opts[0])) {
 631                 dsType = DsType.DERIVE;
 632             } else if ("GAUGE".equals(opts[0])) {
 633                 dsType = DsType.GAUGE;
 634             } else {
 635                 logger.warn("{}: dsType {} not supported", name, opts[0]);
 636             }
 637
 638             heartbeat = Integer.parseInt(opts[1]);
 639
 640             if ("U".equals(opts[2])) {
 641                 min = Double.NaN;
 642             } else {
 643                 min = Double.parseDouble(opts[2]);
 644             }
 645
 646             if ("U".equals(opts[3])) {
 647                 max = Double.NaN;
 648             } else {
 649                 max = Double.parseDouble(opts[3]);
 650             }
 651
 652             step = Integer.parseInt(opts[4]);
 653
 654             isInitialized = true; // successfully initialized
 655
 656             return;
 657         }
 658
 659         public void addArchives(String archivesString) {
 660             String splitArchives[] = archivesString.split(":");
 661             for (String archiveString : splitArchives) {
 662                 String[] opts = archiveString.split(",");
 663                 if (opts.length != 4) { // check if correct number of parameters
 664                     logger.warn("invalid number of parameters {}: {}", name, archiveString);
 665                     return;
 666                 }
 667                 RrdArchiveDef arc = new RrdArchiveDef();
 668
 669                 if ("AVERAGE".equals(opts[0])) {
 670                     arc.fcn = ConsolFun.AVERAGE;
 671                 } else if ("MIN".equals(opts[0])) {
 672                     arc.fcn = ConsolFun.MIN;
 673                 } else if ("MAX".equals(opts[0])) {
 674                     arc.fcn = ConsolFun.MAX;
 675                 } else if ("LAST".equals(opts[0])) {
 676                     arc.fcn = ConsolFun.LAST;
 677                 } else if ("FIRST".equals(opts[0])) {
 678                     arc.fcn = ConsolFun.FIRST;
 679                 } else if ("TOTAL".equals(opts[0])) {
 680                     arc.fcn = ConsolFun.TOTAL;
 681                 } else {
 682                     logger.warn("{}: consolidation function  {} not supported", name, opts[0]);
 683                 }
 684                 arc.xff = Double.parseDouble(opts[1]);
 685                 arc.steps = Integer.parseInt(opts[2]);
 686                 arc.rows = Integer.parseInt(opts[3]);
 687                 archives.add(arc);
 688             }
 689         }
 690
 691         public void addItems(String itemsString) {
 692             Collections.addAll(itemNames, itemsString.split(","));
 693         }
 694
 695         public boolean appliesTo(String item) {
 696             return itemNames.contains(item);
 697         }
 698
 699         public boolean isValid() { // a valid configuration must be initialized
 700             // and contain at least one function
 701             return isInitialized && !archives.isEmpty();
 702         }
 703
 704         @Override
 705         public String toString() {
 706             StringBuilder sb = new StringBuilder(name);
 707             sb.append(" = ").append(dsType);
 708             sb.append(" heartbeat = ").append(heartbeat);
 709             sb.append(" min/max = ").append(min).append("/").append(max);
 710             sb.append(" step = ").append(step);
 711             sb.append(" ").append(archives.size()).append(" archives(s) = [");
 712             for (RrdArchiveDef arc : archives) {
 713                 sb.append(arc.toString());
 714             }
 715             sb.append("] ");
 716             sb.append(itemNames.size()).append(" items(s) = [");
 717             for (String item : itemNames) {
 718                 sb.append(item).append(" ");
 719             }
 720             sb.append("]");
 721             return sb.toString();
 722         }
 723     }
 724
 725     @Override
 726     public List<PersistenceStrategy> getDefaultStrategies() {
 727         return List.of(PersistenceStrategy.Globals.RESTORE, PersistenceStrategy.Globals.CHANGE,
 728                 new PersistenceCronStrategy("everyMinute", "0 * * * * ?"));
 729     }
 730 }