bundles/org.simantics.acorn/src/org/simantics/acorn/ClusterManager.java

   1 package org.simantics.acorn;
   2
   3 import java.io.IOException;
   4 import java.math.BigInteger;
   5 import java.nio.file.DirectoryStream;
   6 import java.nio.file.Files;
   7 import java.nio.file.Path;
   8 import java.nio.file.StandardCopyOption;
   9 import java.util.ArrayList;
  10 import java.util.Collection;
  11 import java.util.HashMap;
  12 import java.util.Map;
  13 import java.util.concurrent.atomic.AtomicBoolean;
  14
  15 import org.simantics.acorn.cluster.ClusterImpl;
  16 import org.simantics.acorn.exception.AcornAccessVerificationException;
  17 import org.simantics.acorn.exception.IllegalAcornStateException;
  18 import org.simantics.acorn.exception.InvalidHeadStateException;
  19 import org.simantics.acorn.internal.ClusterSupport2;
  20 import org.simantics.acorn.lru.ChangeSetInfo;
  21 import org.simantics.acorn.lru.ClusterInfo;
  22 import org.simantics.acorn.lru.ClusterLRU;
  23 import org.simantics.acorn.lru.ClusterStreamChunk;
  24 import org.simantics.acorn.lru.FileInfo;
  25 import org.simantics.acorn.lru.LRU;
  26 import org.simantics.db.ClusterCreator;
  27 import org.simantics.db.Database.Session.ClusterIds;
  28 import org.simantics.db.Database.Session.ResourceSegment;
  29 import org.simantics.db.ServiceLocator;
  30 import org.simantics.db.exception.DatabaseException;
  31 import org.simantics.db.impl.ClusterBase;
  32 import org.simantics.db.impl.ClusterI;
  33 import org.simantics.db.impl.ClusterSupport;
  34 import org.simantics.db.procore.cluster.ClusterTraits;
  35 import org.simantics.db.service.ClusterSetsSupport;
  36 import org.simantics.db.service.ClusterUID;
  37 import org.simantics.utils.FileUtils;
  38 import org.simantics.utils.threads.logger.ITask;
  39 import org.simantics.utils.threads.logger.ThreadLogger;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 public class ClusterManager {
  44
  45     final static Logger LOGGER = LoggerFactory.getLogger(ClusterManager.class);
  46
  47         private ArrayList<String> currentChanges = new ArrayList<String>();
  48
  49         public final Path dbFolder;
  50         public Path lastSessionDirectory;
  51         public Path workingDirectory;
  52
  53         public LRU<String, ClusterStreamChunk> streamLRU;
  54         public LRU<Long, ChangeSetInfo> csLRU;
  55         public ClusterLRU clusterLRU;
  56         public LRU<String, FileInfo> fileLRU;
  57
  58         public MainState mainState;
  59         public HeadState state;
  60
  61         private long lastSnapshot = System.nanoTime();
  62
  63         final public ClusterSupport2 support = new ClusterSupport2(this);
  64
  65         /*
  66          * Public interface
  67          *
  68          */
  69
  70         public ClusterManager(Path dbFolder) {
  71                 this.dbFolder = dbFolder;
  72         }
  73
  74         public ArrayList<String> getChanges(long changeSetId) throws AcornAccessVerificationException, IllegalAcornStateException {
  75                 ChangeSetInfo info = csLRU.getWithoutMutex(changeSetId);
  76                 info.acquireMutex();
  77                 try {
  78                         info.makeResident();
  79                         return info.getCCSIds();
  80                 } finally {
  81                         info.releaseMutex();
  82                 }
  83         }
  84
  85         public ClusterBase getClusterByClusterKey(int clusterKey) throws DatabaseException, AcornAccessVerificationException, IllegalAcornStateException {
  86                 return clusterLRU.getClusterByClusterKey(clusterKey);
  87         }
  88
  89         public ClusterBase getClusterByClusterUIDOrMake(ClusterUID clusterUID) throws DatabaseException, AcornAccessVerificationException, IllegalAcornStateException {
  90                 return clusterLRU.getClusterByClusterUIDOrMake(clusterUID);
  91         }
  92
  93         public ClusterImpl getClusterByClusterUIDOrMakeProxy(ClusterUID clusterUID) throws DatabaseException, AcornAccessVerificationException, IllegalAcornStateException {
  94                 return clusterLRU.getClusterByClusterUIDOrMakeProxy(clusterUID);
  95         }
  96
  97         public int getClusterKeyByClusterUIDOrMake(ClusterUID clusterUID) throws AcornAccessVerificationException {
  98                 return clusterLRU.getClusterKeyByClusterUIDOrMake(clusterUID);
  99         }
 100
 101         public int getClusterKeyByClusterUIDOrMakeWithoutMutex(ClusterUID clusterUID) throws IllegalAcornStateException, AcornAccessVerificationException {
 102                 return clusterLRU.getClusterKeyByClusterUIDOrMakeWithoutMutex(clusterUID);
 103         }
 104
 105         public int getClusterKeyByUID(long id1, long id2) throws DatabaseException, IllegalAcornStateException {
 106                 return clusterLRU.getClusterKeyByUIDWithoutMutex(id1, id2);
 107         }
 108
 109         public <T extends ClusterI> T getClusterProxyByResourceKey(int resourceKey) throws DatabaseException, AcornAccessVerificationException, IllegalAcornStateException {
 110                 return clusterLRU.getClusterProxyByResourceKey(resourceKey);
 111         }
 112
 113         public ClusterUID getClusterUIDByResourceKey(int resourceKey) throws DatabaseException, AcornAccessVerificationException {
 114                 return clusterLRU.getClusterUIDByResourceKey(resourceKey);
 115         }
 116
 117         public ClusterUID getClusterUIDByResourceKeyWithoutMutex(int resourceKey) throws DatabaseException, IllegalAcornStateException, AcornAccessVerificationException {
 118                 return clusterLRU.getClusterUIDByResourceKeyWithoutMutex(resourceKey);
 119         }
 120
 121         /*
 122          * Private implementation
 123          *
 124          */
 125
 126         private static long countFiles(Path directory) throws IOException {
 127                 try (DirectoryStream<Path> ds = Files.newDirectoryStream(directory)) {
 128                         int count = 0;
 129                         for (@SuppressWarnings("unused") Path p : ds)
 130                                 ++count;
 131                         return count;
 132                 }
 133         }
 134
 135         // Add check to make sure if it safe to make snapshot (used with cancel which is not yet supported and may cause corrupted head.state writing)
 136         private AtomicBoolean safeToMakeSnapshot = new AtomicBoolean(true);
 137         private IllegalAcornStateException cause;
 138
 139         public synchronized void purge(ServiceLocator locator) throws IllegalAcornStateException {
 140
 141             try {
 142
 143                 // Schedule writing of all data to disk
 144                 refreshHeadState();
 145                 // Wait for files to be written
 146                 synchronizeWorkingDirectory();
 147
 148                 String currentDir = workingDirectory.getFileName().toString();
 149                 Path baseline = workingDirectory.resolveSibling(currentDir + "_baseline");
 150
 151                 Files.createDirectories(baseline);
 152
 153                 for(String clusterKey : state.clusters) {
 154                         String[] parts1 = clusterKey.split("#");
 155                         String[] parts = parts1[0].split("\\.");
 156                         String readDirName = parts1[1];
 157                         if(!readDirName.equals(currentDir)) {
 158                                 String fileName = parts[0] + "." + parts[1] + ".cluster";
 159                                 Path from = dbFolder.resolve(readDirName).resolve(fileName);
 160                                 Path to = baseline.resolve(fileName);
 161                                 System.err.println("purge copies " + from + "  => " + to);
 162                                 Files.copy(from, to, StandardCopyOption.COPY_ATTRIBUTES);
 163                                 long first = new BigInteger(parts[0], 16).longValue();
 164                                 long second = new BigInteger(parts[1], 16).longValue();
 165                                 ClusterUID uuid = ClusterUID.make(first, second);
 166                                 ClusterInfo info = clusterLRU.getWithoutMutex(uuid);
 167                                 info.moveTo(baseline);
 168                         }
 169                 }
 170
 171                 for (String fileKey : state.files) {
 172                         String[] parts = fileKey.split("#");
 173                         String readDirName = parts[1];
 174                         if(!readDirName.equals(currentDir)) {
 175                                 String fileName = parts[0] + ".extFile";
 176                                 Path from = dbFolder.resolve(readDirName).resolve(fileName);
 177                                 Path to = baseline.resolve(fileName);
 178                                 System.err.println("purge copies " + from + "  => " + to);
 179                                 Files.copy(from, to, StandardCopyOption.COPY_ATTRIBUTES);
 180                                 FileInfo info = fileLRU.getWithoutMutex(parts[0]);
 181                                 info.moveTo(baseline);
 182                         }
 183                 }
 184
 185                 for (String fileKey : state.stream) {
 186                         String[] parts = fileKey.split("#");
 187                         String readDirName = parts[1];
 188                         if(!readDirName.equals(currentDir)) {
 189                                 ClusterStreamChunk chunk = streamLRU.purge(parts[0]);
 190                                 System.err.println("purge removes " + chunk);
 191                         }
 192                 }
 193
 194                 // Change sets
 195                 for (String fileKey : state.cs) {
 196                         String[] parts = fileKey.split("#");
 197                         String readDirName = parts[1];
 198                         if(!readDirName.equals(currentDir)) {
 199                                 Long revisionId = Long.parseLong(parts[0]);
 200                                 ChangeSetInfo info = csLRU.purge(revisionId);
 201                                 System.err.println("purge removes " + info);
 202                         }
 203 //                      Path readDir = dbFolder.resolve(parts[1]);
 204 //                      Long revisionId = Long.parseLong(parts[0]);
 205 //                      int offset = Integer.parseInt(parts[2]);
 206 //                      int length = Integer.parseInt(parts[3]);
 207 //                      ChangeSetInfo info = new ChangeSetInfo(csLRU, readDir, revisionId, offset, length);
 208 //                      csLRU.map(info);
 209                 }
 210
 211                 state.tailChangeSetId = state.headChangeSetId;
 212
 213                 makeSnapshot(locator, true);
 214
 215                 Files.walk(dbFolder, 1).filter(Files::isDirectory).forEach(f -> tryPurgeDirectory(f));
 216
 217             } catch (IllegalAcornStateException e) {
 218                 notSafeToMakeSnapshot(e);
 219                 throw e;
 220             } catch (IOException e) {
 221                 IllegalAcornStateException e1 = new IllegalAcornStateException(e);
 222                 notSafeToMakeSnapshot(e1);
 223                 throw e1;
 224             } catch (AcornAccessVerificationException e) {
 225                 IllegalAcornStateException e1 = new IllegalAcornStateException(e);
 226                 notSafeToMakeSnapshot(e1);
 227                 throw e1;
 228                 }
 229
 230         }
 231
 232         void tryPurgeDirectory(Path f) {
 233
 234
 235                 System.err.println("purge deletes " + f);
 236
 237                 String currentDir = f.getFileName().toString();
 238                 if(currentDir.endsWith("db"))
 239                         return;
 240
 241                 if(currentDir.endsWith("_baseline"))
 242                         currentDir = currentDir.replace("_baseline", "");
 243
 244                 int ordinal = Integer.parseInt(currentDir);
 245                 if(ordinal < mainState.headDir - 1) {
 246                         System.err.println("purge deletes " + f);
 247                         FileUtils.deleteDir(f.toFile());
 248                 }
 249
 250         }
 251
 252         public synchronized boolean makeSnapshot(ServiceLocator locator, boolean fullSave) throws IllegalAcornStateException {
 253             try {
 254             if (!safeToMakeSnapshot.get())
 255                 throw cause;
 256                 // Maximum autosave frequency is per 60s
 257                 if(!fullSave && System.nanoTime() - lastSnapshot < 10*1000000000L) {
 258     //              System.err.println("lastSnapshot too early");
 259                     return false;
 260                 }
 261
 262                 // Cluster files are always there
 263                 // Nothing has been written => no need to do anything
 264                 long amountOfFiles = countFiles(workingDirectory);
 265                 if(!fullSave && amountOfFiles == 0) {
 266                         //LOGGER.info("makeSnapshot: " + amountOfFiles + " files, skipping snapshot");
 267                     return false;
 268                 }
 269
 270                 LOGGER.info("makeSnapshot: start with " + amountOfFiles + " files");
 271
 272                 // Schedule writing of all data to disk
 273             refreshHeadState();
 274
 275                 // Wait for all files to be written
 276                 clusterLRU.shutdown();
 277                 fileLRU.shutdown();
 278                 streamLRU.shutdown();
 279                 csLRU.shutdown();
 280
 281                 // Lets check if it is still safe to make a snapshot
 282                 if (!safeToMakeSnapshot.get())
 283                     throw cause;
 284
 285                 ClusterSetsSupport cssi = locator.getService(ClusterSetsSupport.class);
 286                 cssi.save();
 287
 288                 persistHeadState();
 289
 290                 if (LOGGER.isInfoEnabled()) {
 291                         amountOfFiles = countFiles(workingDirectory);
 292                         LOGGER.info(" -finished: amount of files is {}", amountOfFiles);
 293                 }
 294
 295                 workingDirectory = dbFolder.resolve(Integer.toString(mainState.headDir));
 296                 if (!Files.exists(workingDirectory)) {
 297                     Files.createDirectories(workingDirectory);
 298                 }
 299
 300                 cssi.updateWriteDirectory(workingDirectory);
 301
 302                 clusterLRU.setWriteDir(workingDirectory);
 303                 fileLRU.setWriteDir(workingDirectory);
 304                 streamLRU.setWriteDir(workingDirectory);
 305                 csLRU.setWriteDir(workingDirectory);
 306
 307                 clusterLRU.resume();
 308                 fileLRU.resume();
 309                 streamLRU.resume();
 310                 csLRU.resume();
 311
 312                 lastSnapshot = System.nanoTime();
 313
 314                 return true;
 315             } catch (IllegalAcornStateException e) {
 316                 notSafeToMakeSnapshot(e);
 317                 throw e;
 318             } catch (IOException e) {
 319                 IllegalAcornStateException e1 = new IllegalAcornStateException(e);
 320                 notSafeToMakeSnapshot(e1);
 321                 throw e1;
 322             }
 323         }
 324
 325         private void refreshHeadState() throws IOException, IllegalAcornStateException {
 326                 state.clusters.clear();
 327                 state.files.clear();
 328                 state.stream.clear();
 329                 state.cs.clear();
 330
 331                 clusterLRU.persist(state.clusters);
 332                 fileLRU.persist(state.files);
 333                 streamLRU.persist(state.stream);
 334                 csLRU.persist(state.cs);
 335         }
 336
 337         private void synchronizeWorkingDirectory() throws IOException {
 338                 // Sync current working directory
 339                 Files.walk(workingDirectory, 1).filter(Files::isRegularFile).forEach(FileIO::uncheckedSyncPath);
 340         }
 341
 342         private void persistHeadState() throws IOException {
 343                 synchronizeWorkingDirectory();
 344                 state.save(workingDirectory);
 345                 mainState.headDir++;
 346         }
 347
 348
 349 //      public void save() throws IOException {
 350 //
 351 //              refreshHeadState();
 352 //
 353 //              clusterLRU.shutdown();
 354 //              fileLRU.shutdown();
 355 //              streamLRU.shutdown();
 356 //              csLRU.shutdown();
 357 //
 358 //              persistHeadState();
 359 //
 360 //              mainState.save(getBaseDirectory());
 361
 362 //              try {
 363 //                      ThreadLogVisualizer visualizer = new ThreadLogVisualizer();
 364 //                      visualizer.read(new DataInputStream(new FileInputStream(
 365 //                                      ThreadLogger.LOG_FILE)));
 366 //                      visualizer.visualize3(new PrintStream(ThreadLogger.LOG_FILE
 367 //                                      + ".svg"));
 368 //              } catch (FileNotFoundException e) {
 369 //                      // TODO Auto-generated catch block
 370 //                      e.printStackTrace();
 371 //              }
 372
 373                 // System.err.println("-- load statistics --");
 374                 // for(Pair<ClusterUID, Integer> entry :
 375                 // CollectionUtils.valueSortedEntries(histogram)) {
 376                 // System.err.println(" " + entry.second + " " + entry.first);
 377                 // }
 378
 379 //      }
 380
 381         private void acquireAll() throws IllegalAcornStateException {
 382                 clusterLRU.acquireMutex();
 383                 fileLRU.acquireMutex();
 384                 streamLRU.acquireMutex();
 385                 csLRU.acquireMutex();
 386         }
 387
 388         private void releaseAll() {
 389                 csLRU.releaseMutex();
 390                 streamLRU.releaseMutex();
 391                 fileLRU.releaseMutex();
 392                 clusterLRU.releaseMutex();
 393         }
 394
 395         private AtomicBoolean rollback = new AtomicBoolean(false);
 396
 397         boolean rolledback() {
 398             return rollback.get();
 399         }
 400
 401         public void load() throws IOException {
 402
 403                 // Main state
 404                 mainState = MainState.load(dbFolder, () -> rollback.set(true));
 405
 406                 lastSessionDirectory = dbFolder.resolve(Integer.toString(mainState.headDir - 1));
 407
 408                 // Head State
 409                 try {
 410             state = HeadState.load(lastSessionDirectory);
 411         } catch (InvalidHeadStateException e) {
 412             // For backwards compatibility only!
 413             Throwable cause = e.getCause();
 414             if (cause instanceof Throwable) {
 415                 try {
 416                     org.simantics.db.javacore.HeadState oldState = org.simantics.db.javacore.HeadState.load(lastSessionDirectory);
 417
 418                     HeadState newState = new HeadState();
 419                     newState.clusters = oldState.clusters;
 420                     newState.cs = oldState.cs;
 421                     newState.files = oldState.files;
 422                     newState.stream = oldState.stream;
 423                     newState.headChangeSetId = oldState.headChangeSetId;
 424                     newState.reservedIds = oldState.reservedIds;
 425                     newState.transactionId = oldState.transactionId;
 426                     state = newState;
 427                 } catch (InvalidHeadStateException e1) {
 428                     throw new IOException("Could not load HeadState due to corruption", e1);
 429                 }
 430             } else {
 431                 // This should never happen as MainState.load() checks the integrity
 432                 // of head.state files and rolls back in cases of corruption until a
 433                 // consistent state is found (could be case 0 - initial db state)
 434                 // IF this does happen something is completely wrong
 435                 throw new IOException("Could not load HeadState due to corruption", e);
 436             }
 437         }
 438                 try {
 439                 workingDirectory = dbFolder.resolve(Integer.toString(mainState.headDir));
 440                 Files.createDirectories(workingDirectory);
 441
 442                 csLRU = new LRU<Long, ChangeSetInfo>(this, "Change Set", workingDirectory);
 443                 streamLRU = new LRU<String, ClusterStreamChunk>(this, "Cluster Stream", workingDirectory);
 444                 clusterLRU = new ClusterLRU(this, "Cluster", workingDirectory);
 445                 fileLRU = new LRU<String, FileInfo>(this, "External Value", workingDirectory);
 446
 447                 acquireAll();
 448
 449                 // Clusters
 450                 for (String clusterKey : state.clusters) {
 451                         String[] parts1 = clusterKey.split("#");
 452                         String[] parts = parts1[0].split("\\.");
 453                         long first = new BigInteger(parts[0], 16).longValue();
 454                         long second = new BigInteger(parts[1], 16).longValue();
 455                         ClusterUID uuid = ClusterUID.make(first, second);
 456                         Path readDir = dbFolder.resolve(parts1[1]);
 457                         int offset = Integer.parseInt(parts1[2]);
 458                         int length = Integer.parseInt(parts1[3]);
 459                         clusterLRU.map(new ClusterInfo(this, clusterLRU, readDir, uuid, offset, length));
 460                 }
 461                 // Files
 462                 for (String fileKey : state.files) {
 463     //                  System.err.println("loadFile: " + fileKey);
 464                         String[] parts = fileKey.split("#");
 465                         Path readDir = dbFolder.resolve(parts[1]);
 466                         int offset = Integer.parseInt(parts[2]);
 467                         int length = Integer.parseInt(parts[3]);
 468                         FileInfo info = new FileInfo(fileLRU, readDir, parts[0], offset, length);
 469                         fileLRU.map(info);
 470                 }
 471                 // Update chunks
 472                 for (String fileKey : state.stream) {
 473     //                  System.err.println("loadStream: " + fileKey);
 474                         String[] parts = fileKey.split("#");
 475                         Path readDir = dbFolder.resolve(parts[1]);
 476                         int offset = Integer.parseInt(parts[2]);
 477                         int length = Integer.parseInt(parts[3]);
 478                         ClusterStreamChunk info = new ClusterStreamChunk(this,
 479                                         streamLRU, readDir, parts[0], offset, length);
 480                         streamLRU.map(info);
 481                 }
 482                 // Change sets
 483                 for (String fileKey : state.cs) {
 484                         String[] parts = fileKey.split("#");
 485                         Path readDir = dbFolder.resolve(parts[1]);
 486                         Long revisionId = Long.parseLong(parts[0]);
 487                         int offset = Integer.parseInt(parts[2]);
 488                         int length = Integer.parseInt(parts[3]);
 489                         ChangeSetInfo info = new ChangeSetInfo(csLRU, readDir, revisionId, offset, length);
 490                         csLRU.map(info);
 491                 }
 492
 493                 releaseAll();
 494                 } catch (IllegalAcornStateException | AcornAccessVerificationException e) {
 495                     // ROLLBACK ONE DIR UNTIL WE ARE FINE!
 496                     throw new IOException(e);
 497                 }
 498         }
 499
 500         public <T> T clone(ClusterUID uid, ClusterCreator creator) throws DatabaseException, AcornAccessVerificationException, IllegalAcornStateException, IOException {
 501
 502                 clusterLRU.ensureUpdates(uid);
 503
 504                 ClusterInfo info = clusterLRU.getWithoutMutex(uid);
 505                 return info.clone(uid, creator);
 506         }
 507
 508         //private int loadCounter = 0;
 509
 510         public static void startLog(String msg) {
 511                 tasks.put(msg, ThreadLogger.getInstance().begin(msg));
 512         }
 513
 514         public static void endLog(String msg) {
 515                 ITask task = tasks.get(msg);
 516                 if (task != null)
 517                         task.finish();
 518         }
 519
 520         static Map<String, ITask> tasks = new HashMap<String, ITask>();
 521
 522         public void update(ClusterUID uid, ClusterImpl clu) throws AcornAccessVerificationException, IllegalAcornStateException {
 523                 ClusterInfo info = clusterLRU.getWithoutMutex(uid);
 524                 info.acquireMutex();
 525                 try {
 526                         info.update(clu);
 527                 } finally {
 528                         info.releaseMutex();
 529                 }
 530         }
 531
 532         public long getClusterIdOrCreate(ClusterUID clusterUID) {
 533                 return 1;
 534         }
 535
 536         public int getResourceKey(ClusterUID uid, int index) throws AcornAccessVerificationException {
 537                 return clusterLRU.getResourceKey(uid, index);
 538         }
 539
 540         public int getResourceKeyWitoutMutex(ClusterUID uid, int index) throws IllegalAcornStateException {
 541                 return clusterLRU.getResourceKeyWithoutMutex(uid, index);
 542         }
 543
 544         public ClusterIds getClusterIds() throws IllegalAcornStateException {
 545                 clusterLRU.acquireMutex();
 546
 547                 try {
 548                         Collection<ClusterInfo> infos = clusterLRU.values();
 549                         final int status = infos.size();
 550                         final long[] firsts = new long[status];
 551                         final long[] seconds = new long[status];
 552
 553                         int index = 0;
 554                         for (ClusterInfo info : infos) {
 555                                 firsts[index] = 0;
 556                                 seconds[index] = info.getKey().second;
 557                                 index++;
 558                         }
 559
 560                         return new ClusterIds() {
 561
 562                                 @Override
 563                                 public int getStatus() {
 564                                         return status;
 565                                 }
 566
 567                                 @Override
 568                                 public long[] getFirst() {
 569                                         return firsts;
 570                                 }
 571
 572                                 @Override
 573                                 public long[] getSecond() {
 574                                         return seconds;
 575                                 }
 576
 577                         };
 578
 579                 } catch (Throwable t) {
 580                         throw new IllegalAcornStateException(t);
 581                 } finally {
 582                         clusterLRU.releaseMutex();
 583                 }
 584         }
 585
 586         public void addIntoCurrentChangeSet(String ccs) throws IllegalAcornStateException {
 587                 csLRU.acquireMutex();
 588
 589                 try {
 590                         currentChanges.add(ccs);
 591                 } catch (Throwable t) {
 592                         throw new IllegalAcornStateException(t);
 593                 } finally {
 594                         csLRU.releaseMutex();
 595                 }
 596         }
 597
 598         public void commitChangeSet(long changeSetId, byte[] data) throws IllegalAcornStateException {
 599                 csLRU.acquireMutex();
 600                 try {
 601                         ArrayList<String> csids = new ArrayList<String>(currentChanges);
 602                         currentChanges = new ArrayList<String>();
 603                         new ChangeSetInfo(csLRU, changeSetId, data, csids);
 604                 } catch (Throwable t) {
 605                         throw new IllegalAcornStateException(t);
 606                 } finally {
 607                         csLRU.releaseMutex();
 608                 }
 609         }
 610
 611         public byte[] getMetadata(long changeSetId) throws AcornAccessVerificationException, IllegalAcornStateException {
 612
 613                 ChangeSetInfo info = csLRU.getWithoutMutex(changeSetId);
 614                 if (info == null) return null;
 615         info.acquireMutex();
 616         try {
 617             return info.getMetadataBytes();
 618         } catch (IllegalAcornStateException | AcornAccessVerificationException e) {
 619             throw e;
 620         } catch (Throwable t) {
 621                         throw new IllegalAcornStateException(t);
 622                 } finally {
 623                         info.releaseMutex();
 624                 }
 625         }
 626
 627         public byte[] getResourceFile(final byte[] clusterUID, final int resourceIndex) throws AcornAccessVerificationException, IllegalAcornStateException {
 628
 629                 ClusterUID uid = ClusterUID.make(clusterUID, 0);
 630                 String key = uid.toString() + "_" + resourceIndex;
 631                 FileInfo info = fileLRU.getWithoutMutex(key);
 632                 if(info == null) return null;
 633                 info.acquireMutex();
 634                 try {
 635                         return info.getResourceFile();
 636                 } catch (IllegalAcornStateException | AcornAccessVerificationException e) {
 637                     throw e;
 638                 } catch (Throwable t) {
 639                         throw new IllegalAcornStateException(t);
 640                 } finally {
 641                         info.releaseMutex();
 642                 }
 643         }
 644
 645         public ResourceSegment getResourceSegment(final byte[] clusterUID, final int resourceIndex, final long segmentOffset, short segmentSize) throws AcornAccessVerificationException, IllegalAcornStateException {
 646                 ClusterUID uid = ClusterUID.make(clusterUID, 0);
 647
 648                 String key = uid.toString() + "_" + resourceIndex;
 649                 FileInfo info = fileLRU.getWithoutMutex(key);
 650                 if(info == null) return null;
 651                 info.acquireMutex();
 652                 try {
 653                         return info.getResourceSegment(clusterUID, resourceIndex, segmentOffset, segmentSize);
 654                 } catch (Throwable t) {
 655                         throw new IllegalAcornStateException(t);
 656                 } finally {
 657                         info.releaseMutex();
 658                 }
 659         }
 660
 661         public void modiFileEx(ClusterUID uid, int resourceKey, long offset, long size, byte[] bytes, long pos, ClusterSupport support) throws IllegalAcornStateException {
 662                 try {
 663                         String key = uid.toString() + "_" + ClusterTraits.getResourceIndexFromResourceKey(resourceKey);
 664
 665                         FileInfo info = null;
 666                         fileLRU.acquireMutex();
 667                         try {
 668                                 info = fileLRU.get(key);
 669                                 if (info == null) {
 670                                         info = new FileInfo(fileLRU, key, (int) (offset + size));
 671                                 }
 672                         } catch (Throwable t) {
 673                                 throw new IllegalAcornStateException(t);
 674                         } finally {
 675                                 fileLRU.releaseMutex();
 676                         }
 677
 678                         info.acquireMutex();
 679                         try {
 680                                 info.updateData(bytes, offset, pos, size);
 681                         } catch (Throwable t) {
 682                                 throw new IllegalAcornStateException(t);
 683                         } finally {
 684                                 info.releaseMutex();
 685                         }
 686                 } catch (DatabaseException e) {
 687                         e.printStackTrace();
 688                 }
 689         }
 690
 691     public void shutdown() {
 692         clusterLRU.shutdown();
 693         fileLRU.shutdown();
 694         streamLRU.shutdown();
 695         csLRU.shutdown();
 696     }
 697
 698     public void notSafeToMakeSnapshot(IllegalAcornStateException t) {
 699         this.safeToMakeSnapshot.compareAndSet(true, false);
 700         this.cause = t;
 701     }
 702
 703     public long getTailChangeSetId() {
 704         return state.tailChangeSetId;
 705     }
 706
 707 }