bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/QueryCacheBase.java

   1 package org.simantics.db.impl.query;
   2
   3 import java.util.ArrayList;
   4 import java.util.Collection;
   5 import java.util.concurrent.Semaphore;
   6 import java.util.concurrent.atomic.AtomicBoolean;
   7
   8 import org.simantics.db.AsyncReadGraph;
   9 import org.simantics.db.ObjectResourceIdMap;
  10 import org.simantics.db.ReadGraph;
  11 import org.simantics.db.RelationInfo;
  12 import org.simantics.db.common.utils.Logger;
  13 import org.simantics.db.exception.DatabaseException;
  14 import org.simantics.db.impl.DebugPolicy;
  15 import org.simantics.db.impl.graph.ReadGraphImpl;
  16 import org.simantics.db.impl.procedure.InternalProcedure;
  17 import org.simantics.db.impl.query.QueryProcessor.SessionTask;
  18 import org.simantics.db.procedure.AsyncMultiProcedure;
  19 import org.simantics.db.procedure.AsyncProcedure;
  20 import org.simantics.db.procedure.Listener;
  21 import org.simantics.db.procedure.ListenerBase;
  22 import org.simantics.db.procedure.Procedure;
  23 import org.simantics.db.procedure.SyncMultiProcedure;
  24 import org.simantics.db.request.AsyncMultiRead;
  25 import org.simantics.db.request.AsyncRead;
  26 import org.simantics.db.request.ExternalRead;
  27 import org.simantics.db.request.MultiRead;
  28 import org.simantics.db.request.Read;
  29
  30 import gnu.trove.map.hash.THashMap;
  31 import gnu.trove.map.hash.TObjectIntHashMap;
  32
  33 public class QueryCacheBase {
  34
  35         // Statistics
  36         final int THREADS;
  37         final public int  THREAD_MASK;
  38         int                                             hits                  = 0;
  39         int                                             misses                = 0;
  40         int                                             updates               = 0;
  41         public int                                              size                  = 0;
  42
  43         volatile public boolean dirty = false;
  44         public boolean                                         collecting            = false;
  45
  46         final protected THashMap<String, URIToResource>                      uRIToResourceMap;
  47         //final protected THashMap<String, NamespaceIndex>                     namespaceIndexMap;
  48         final protected UnaryQueryHashMap<InternalProcedure<ObjectResourceIdMap<String>>> childMapMap;
  49         final protected DoubleKeyQueryHashMap<IntProcedure>                     objectsMap;
  50         final protected DoubleKeyQueryHashMap<TripleIntProcedure>               assertedStatementsMap;
  51         final protected DoubleKeyQueryHashMap<IntProcedure>                     directObjectsMap;
  52         final protected DoubleKeyQueryHashMap<TripleIntProcedure>               statementsMap;
  53         final protected UnaryQueryHashMap<InternalProcedure<IntSet>>         typesMap;
  54         final protected UnaryQueryHashMap<IntProcedure>                      principalTypesMap;
  55         final protected UnaryQueryHashMap<InternalProcedure<IntSet>>         predicatesMap;
  56         final protected UnaryQueryHashMap<InternalProcedure<IntSet>>         superTypesMap;
  57         final protected UnaryQueryHashMap<InternalProcedure<IntSet>>         typeHierarchyMap;
  58         final protected UnaryQueryHashMap<InternalProcedure<IntSet>>         superRelationsMap;
  59
  60         final protected UnaryQueryHashMap<IntProcedure>                      orderedSetMap;
  61         final protected UnaryQueryHashMap<IntProcedure>                      assertedPredicatesMap;
  62         final protected UnaryQueryHashMap<InternalProcedure<IntSet>>         directPredicatesMap;
  63         final protected UnaryQueryHashMap<IntProcedure>                      directSuperRelationsMap;
  64
  65         final protected UnaryQueryHashMap<InternalProcedure<RelationInfo>>   relationInfoQueryMap;
  66         final protected UnaryQueryHashMap<InternalProcedure<byte[]>>         valueQueryMap;
  67
  68         final protected StableHashMap<AsyncRead, AsyncReadEntry>                  asyncReadEntryMap;
  69         final protected StableHashMap<Read, ReadEntry>                            readEntryMap;
  70         final protected StableHashMap<MultiRead, MultiReadEntry>                  multiReadEntryMap;
  71         final protected StableHashMap<AsyncMultiRead, AsyncMultiReadEntry>        asyncMultiReadEntryMap;
  72         final protected StableHashMap<ExternalRead, ExternalReadEntry>            externalReadEntryMap;
  73
  74         final THashMap<CacheEntry, ArrayList<ListenerEntry>>       listeners;
  75
  76         final public QuerySupport                               querySupport;
  77
  78         public QueryCacheBase(QuerySupport querySupport, int threads) {
  79
  80                 THREADS = threads;
  81                 THREAD_MASK = threads - 1;
  82
  83                 this.querySupport = querySupport;
  84                 directPredicatesMap = new UnaryQueryHashMap();
  85                 directSuperRelationsMap = new UnaryQueryHashMap();
  86                 valueQueryMap = new UnaryQueryHashMap();
  87                 principalTypesMap = new UnaryQueryHashMap();
  88                 uRIToResourceMap = new THashMap<String, URIToResource>();
  89                 //namespaceIndexMap = new THashMap<String, NamespaceIndex>();
  90                 childMapMap = new UnaryQueryHashMap<InternalProcedure<ObjectResourceIdMap<String>>>();
  91                 relationInfoQueryMap = new UnaryQueryHashMap();
  92                 typeHierarchyMap = new UnaryQueryHashMap();
  93                 superTypesMap = new UnaryQueryHashMap();
  94                 superRelationsMap = new UnaryQueryHashMap();
  95                 typesMap = new UnaryQueryHashMap();
  96                 objectsMap = new DoubleKeyQueryHashMap();
  97                 orderedSetMap = new UnaryQueryHashMap();
  98                 predicatesMap = new UnaryQueryHashMap();
  99                 statementsMap = new DoubleKeyQueryHashMap();
 100                 directObjectsMap = new DoubleKeyQueryHashMap();
 101                 assertedPredicatesMap = new UnaryQueryHashMap();
 102                 assertedStatementsMap = new DoubleKeyQueryHashMap();
 103                 asyncReadEntryMap = new StableHashMap<AsyncRead, AsyncReadEntry>();
 104                 readEntryMap = new StableHashMap<Read, ReadEntry>();
 105                 asyncMultiReadEntryMap = new StableHashMap<AsyncMultiRead, AsyncMultiReadEntry>();
 106                 multiReadEntryMap = new StableHashMap<MultiRead, MultiReadEntry>();
 107                 externalReadEntryMap = new StableHashMap<ExternalRead, ExternalReadEntry>();
 108                 listeners = new THashMap<CacheEntry, ArrayList<ListenerEntry>>(10, 0.75f);
 109         }
 110
 111 //      public <T> Object performQuery(ReadGraphImpl parentGraph, final AsyncRead<T> query, final CacheEntryBase entry_, AsyncProcedure procedure_) throws DatabaseException {
 112 //
 113 //              AsyncReadEntry<T> entry = (AsyncReadEntry<T>)entry_;
 114 //              AsyncProcedure<T> procedure = (AsyncProcedure<T>)procedure_;
 115 //
 116 //              ReadGraphImpl queryGraph = parentGraph.withParent(entry_);
 117 //
 118 //              try {
 119 //
 120 //                      query.perform(queryGraph, new AsyncProcedure<T>() {
 121 //
 122 //                              @Override
 123 //                              public void execute(AsyncReadGraph returnGraph, T result) {
 124 //                                      ReadGraphImpl impl = (ReadGraphImpl)returnGraph;
 125 //                                      entry.addOrSet(parentGraph, result);
 126 //                                      try {
 127 //                                              procedure.execute(parentGraph, result);
 128 //                                      } catch (Throwable t) {
 129 //                                              t.printStackTrace();
 130 //                                      }
 131 ////                                    parentBarrier.dec(query);
 132 //                              }
 133 //
 134 //                              @Override
 135 //                              public void exception(AsyncReadGraph returnGraph, Throwable t) {
 136 //                                      ReadGraphImpl impl = (ReadGraphImpl)returnGraph;
 137 ////                                    AsyncReadGraph resumeGraph = finalParentGraph.newAsync();
 138 //                                      entry.except(parentGraph, t);
 139 //                                      try {
 140 //                                              procedure.exception(parentGraph, t);
 141 //                                      } catch (Throwable t2) {
 142 //                                              t2.printStackTrace();
 143 //                                      }
 144 ////                                    parentBarrier.dec(query);
 145 //                              }
 146 //
 147 //                              @Override
 148 //                              public String toString() {
 149 //                                      return procedure.toString();
 150 //                              }
 151 //
 152 //                      });
 153 //
 154 //              } catch (Throwable t) {
 155 //
 156 //                      entry.except(t);
 157 //                      try {
 158 //                              procedure.exception(parentGraph, t);
 159 //                      } catch (Throwable t2) {
 160 //                              t2.printStackTrace();
 161 //                      }
 162 ////                    parentBarrier.dec(query);
 163 //
 164 //              }
 165 //
 166 //              return null;
 167 //
 168 //      }
 169
 170 //      public <T> Object performQuery(ReadGraphImpl parentGraph, final Read<T> query, final CacheEntryBase entry_, AsyncProcedure procedure_) throws DatabaseException {
 171 //
 172 //              ReadGraphImpl queryGraph = parentGraph.withParent(entry_);
 173 //
 174 //              ReadEntry entry = (ReadEntry)entry_;
 175 //
 176 //              try {
 177 //
 178 //                      T result = (T)query.perform(queryGraph);
 179 //                      entry.addOrSet(queryGraph, result);
 180 //
 181 //                      return (T)entry.get(parentGraph, procedure_);
 182 //
 183 //              }  catch (Throwable t) {
 184 //
 185 //                      entry.except(t);
 186 //                      return (T)entry.get(parentGraph, procedure_);
 187 //
 188 //              }
 189 //
 190 //      }
 191
 192         public <T> Object performQuery(ReadGraphImpl parentGraph, final ExternalRead<T> query, final CacheEntryBase entry_, AsyncProcedure procedure_) throws DatabaseException {
 193
 194                 ExternalReadEntry entry = (ExternalReadEntry)entry_;
 195                 AsyncProcedure<T> procedure = (AsyncProcedure<T>)procedure_;
 196
 197                 try {
 198
 199                         query.register(parentGraph, new Listener<T>() {
 200
 201                                 AtomicBoolean used = new AtomicBoolean(false);
 202
 203                                 @Override
 204                                 public void execute(T result) {
 205
 206                                         // Just for safety
 207                                         if(entry.isDiscarded()) return;
 208
 209                                         if(used.compareAndSet(false, true)) {
 210                             //entry.setPending();
 211                                                 entry.addOrSet(parentGraph.processor, result);
 212                                                 procedure.execute(parentGraph, result);
 213                                         } else {
 214                                                 entry.queue(result);
 215                                                 parentGraph.processor.updatePrimitive(query);
 216                                         }
 217
 218                                 }
 219
 220                                 @Override
 221                                 public void exception(Throwable t) {
 222
 223                                         entry.except(t);
 224
 225                                         if(used.compareAndSet(false, true)) {
 226                                                 procedure.exception(parentGraph, t);
 227                                         } else {
 228 //                                              entry.queue(result);
 229                                                 parentGraph.processor.updatePrimitive(query);
 230                                         }
 231
 232                                 }
 233
 234                                 @Override
 235                                 public String toString() {
 236                                         return procedure.toString();
 237                                 }
 238
 239                                 @Override
 240                                 public boolean isDisposed() {
 241                                         return entry.isDiscarded() || !parentGraph.processor.isBound(entry);
 242                                 }
 243
 244                         });
 245
 246                         return entry.getResult();
 247
 248                 } catch (Throwable t) {
 249
 250                         entry.except(t);
 251                         procedure.exception(parentGraph, t);
 252                         return entry.getResult();
 253
 254                 }
 255
 256         }
 257
 258         public <T> Object performQuery(ReadGraphImpl parentGraph, final AsyncMultiRead<T> query, final CacheEntryBase entry_, Object procedure_) throws DatabaseException {
 259
 260                 ReadGraphImpl queryGraph = parentGraph.withParent(entry_);
 261
 262                 AsyncMultiReadEntry entry = (AsyncMultiReadEntry)entry_;
 263                 AsyncMultiProcedure<T> procedure = (AsyncMultiProcedure<T>)procedure_;
 264
 265                 try {
 266
 267                         query.perform(queryGraph, new AsyncMultiProcedure<T>() {
 268
 269                                 @Override
 270                                 public void execute(AsyncReadGraph graph, T result) {
 271                                         ReadGraphImpl impl = (ReadGraphImpl)graph;
 272                                         entry.addOrSet(result);
 273                                         try {
 274                                                 procedure.execute(parentGraph, result);
 275                                         } catch (Throwable t) {
 276                                                 t.printStackTrace();
 277                                         }
 278                                 }
 279
 280                                 @Override
 281                                 public void finished(AsyncReadGraph graph) {
 282                                         ReadGraphImpl impl = (ReadGraphImpl)graph;
 283                                         entry.finish(parentGraph);
 284                                         try {
 285                                                 procedure.finished(parentGraph);
 286                                         } catch (Throwable t) {
 287                                                 t.printStackTrace();
 288                                         }
 289                                 }
 290
 291                                 @Override
 292                                 public void exception(AsyncReadGraph graph, Throwable t) {
 293                                         ReadGraphImpl impl = (ReadGraphImpl)graph;
 294                                         entry.except(parentGraph, t);
 295                                         try {
 296                                                 procedure.exception(parentGraph, t);
 297                                         } catch (Throwable t2) {
 298                                                 t2.printStackTrace();
 299                                         }
 300                                 }
 301
 302                         });
 303
 304                         return entry.getResult();
 305
 306                 } catch (Throwable t) {
 307
 308                         entry.except(t);
 309                         try {
 310                                 procedure.exception(parentGraph, t);
 311                         } catch (Throwable t2) {
 312                                 t2.printStackTrace();
 313                         }
 314
 315                         return entry.getResult();
 316
 317                 }
 318
 319         }
 320
 321         public <T> Object performQuery(ReadGraphImpl parentGraph, final MultiRead<T> query, final CacheEntryBase entry_, Object procedure_) throws DatabaseException {
 322
 323                 ReadGraphImpl queryGraph = parentGraph.withParent(entry_);
 324
 325                 MultiReadEntry entry = (MultiReadEntry)entry_;
 326                 SyncMultiProcedure<T> procedure = (SyncMultiProcedure<T>)procedure_;
 327
 328                 try {
 329
 330                         query.perform(queryGraph, new SyncMultiProcedure<T>() {
 331
 332                                 @Override
 333                                 public void execute(ReadGraph graph, T result) {
 334                                         ReadGraphImpl impl = (ReadGraphImpl)graph;
 335                                         entry.addOrSet(result);
 336                                         try {
 337                                                 procedure.execute(parentGraph, result);
 338                                         } catch (Throwable t) {
 339                                                 t.printStackTrace();
 340                                         }
 341                                 }
 342
 343                                 @Override
 344                                 public void finished(ReadGraph graph) {
 345                                         ReadGraphImpl impl = (ReadGraphImpl)graph;
 346                                         entry.finish(parentGraph);
 347                                         try {
 348                                                 procedure.finished(parentGraph);
 349                                         } catch (Throwable t) {
 350                                                 t.printStackTrace();
 351                                         }
 352                                 }
 353
 354                                 @Override
 355                                 public void exception(ReadGraph graph, Throwable t) {
 356                                         ReadGraphImpl impl = (ReadGraphImpl)graph;
 357                                         entry.except((DatabaseException)t);
 358                                         try {
 359                                                 procedure.exception(parentGraph, t);
 360                                         } catch (Throwable t2) {
 361                                                 t2.printStackTrace();
 362                                         }
 363                                 }
 364
 365                         });
 366
 367                         return entry.getResult();
 368
 369                 } catch (Throwable t) {
 370
 371                         entry.except(t);
 372                         try {
 373                                 procedure.exception(parentGraph, t);
 374                         } catch (Throwable t2) {
 375                                 t2.printStackTrace();
 376                         }
 377
 378                         return entry.getResult();
 379
 380                 }
 381
 382         }
 383
 384         public ListenerEntry registerDependencies(ReadGraphImpl graph, CacheEntry child, CacheEntry parent, ListenerBase listener, Object procedure, boolean inferred) {
 385
 386                 if (parent != null && !inferred) {
 387                         try {
 388                                 if(!child.isImmutable(graph)) {
 389                                         synchronized(child) {
 390                                                 child.addParent(parent);
 391                                         }
 392                                 }
 393                         } catch (DatabaseException e) {
 394                                 Logger.defaultLogError(e);
 395                         }
 396                         if(DebugPolicy.DEPENDENCIES) System.out.println(child + " -> " + parent);
 397                 }
 398
 399                 if (listener != null) {
 400                         return registerListener(child, listener, procedure);
 401                 } else {
 402                         return null;
 403                 }
 404
 405         }
 406
 407         public synchronized ListenerEntry registerListener(final CacheEntry entry, final ListenerBase base, final Object procedure) {
 408
 409                 assert (entry != null);
 410
 411                 if (base.isDisposed())
 412                         return null;
 413
 414                 return addListener(entry, base, procedure);
 415
 416         }
 417
 418         protected void primeListenerEntry(final ListenerEntry entry, final Object result) {
 419                 entry.setLastKnown(result);
 420         }
 421
 422         private ListenerEntry addListener(CacheEntry entry, ListenerBase base, Object procedure) {
 423
 424                 assert (entry != null);
 425                 assert (procedure != null);
 426
 427                 ArrayList<ListenerEntry> list = listeners.get(entry);
 428                 if (list == null) {
 429                         list = new ArrayList<ListenerEntry>(1);
 430                         listeners.put(entry, list);
 431                 }
 432
 433                 ListenerEntry result = new ListenerEntry(entry, base, procedure);
 434                 int currentIndex = list.indexOf(result);
 435                 // There was already a listener
 436                 if(currentIndex > -1) {
 437                         ListenerEntry current = list.get(currentIndex);
 438                         if(!current.base.isDisposed()) return null;
 439                         list.set(currentIndex, result);
 440                 } else {
 441                         list.add(result);
 442                 }
 443
 444                 if(DebugPolicy.LISTENER) {
 445                         new Exception().printStackTrace();
 446                         System.out.println("addListener -> " + list.size() + " " + entry + " " + base + " " + procedure);
 447                 }
 448
 449                 return result;
 450
 451         }
 452
 453
 454         public Collection<CacheEntry> getRootList() {
 455
 456                 ArrayList<CacheEntry> result = new ArrayList<CacheEntry>();
 457
 458                 for (Object e : valueQueryMap.values()) {
 459                         result.add((CacheEntry) e);
 460                 }
 461                 for (Object e : directPredicatesMap.values()) {
 462                         result.add((CacheEntry) e);
 463                 }
 464                 for (Object e : directSuperRelationsMap.values()) {
 465                         result.add((CacheEntry) e);
 466                 }
 467                 for (Object e : objectsMap.values()) {
 468                         result.add((CacheEntry) e);
 469                 }
 470                 for (Object e : directObjectsMap.values()) {
 471                         result.add((CacheEntry) e);
 472                 }
 473                 for (Object e : principalTypesMap.values()) {
 474                         result.add((CacheEntry) e);
 475                 }
 476                 for (Object e : superRelationsMap.values()) {
 477                         result.add((CacheEntry) e);
 478                 }
 479                 for (Object e : superTypesMap.values()) {
 480                         result.add((CacheEntry) e);
 481                 }
 482                 for (Object e : typesMap.values()) {
 483                         result.add((CacheEntry) e);
 484                 }
 485                 for (Object e : objectsMap.values()) {
 486                         result.add((CacheEntry) e);
 487                 }
 488                 for (Object e : assertedStatementsMap.values()) {
 489                         result.add((CacheEntry) e);
 490                 }
 491                 for (Object e : readEntryMap.values()) {
 492                         if(e instanceof CacheEntry) {
 493                                 result.add((CacheEntry) e);
 494                         } else {
 495                                 System.err.println("e=" + e);
 496                         }
 497                 }
 498                 for (Object e : asyncReadEntryMap.values()) {
 499                         if(e instanceof CacheEntry) {
 500                                 result.add((CacheEntry) e);
 501                         } else {
 502                                 System.err.println("e=" + e);
 503                         }
 504                 }
 505                 for (Object e : externalReadEntryMap.values()) {
 506                         result.add((CacheEntry) e);
 507                 }
 508                 for (Object e : orderedSetMap.values()) {
 509                         result.add((CacheEntry) e);
 510                 }
 511
 512                 return result;
 513
 514         }
 515
 516         public int calculateCurrentSize() {
 517
 518                 int realSize = 0;
 519
 520                 realSize += directPredicatesMap.size();
 521                 realSize += directSuperRelationsMap.size();
 522                 realSize += principalTypesMap.size();
 523                 realSize += uRIToResourceMap.size();
 524                 //realSize += namespaceIndexMap.size();
 525                 realSize += childMapMap.size();
 526
 527                 realSize += relationInfoQueryMap.size();
 528                 realSize += superTypesMap.size();
 529                 realSize += typeHierarchyMap.size();
 530                 realSize += superRelationsMap.size();
 531                 realSize += typesMap.size();
 532
 533                 realSize += valueQueryMap.size();
 534                 realSize += directObjectsMap.size();
 535                 realSize += objectsMap.size();
 536                 realSize += orderedSetMap.size();
 537                 realSize += predicatesMap.size();
 538
 539                 realSize += statementsMap.size();
 540                 realSize += assertedPredicatesMap.size();
 541                 realSize += assertedStatementsMap.size();
 542                 realSize += externalReadEntryMap.size();
 543                 realSize += asyncReadEntryMap.size();
 544
 545                 realSize += readEntryMap.size();
 546                 realSize += asyncMultiReadEntryMap.size();
 547                 realSize += multiReadEntryMap.size();
 548
 549                 return realSize;
 550
 551         }
 552
 553         CacheCollectionResult allCaches(CacheCollectionResult result) {
 554
 555                 int level = Integer.MAX_VALUE;
 556                 directPredicatesMap.values(level, result);
 557                 directSuperRelationsMap.values(level, result);
 558                 principalTypesMap.values(level, result);
 559                 for(CacheEntryBase e : uRIToResourceMap.values())
 560                         if(e.getLevel() <= level)
 561                                 result.add(e);
 562 //              for(CacheEntryBase e : namespaceIndexMap.values())
 563 //                      if(e.getLevel() <= level)
 564 //                              result.add(e);
 565
 566                 childMapMap.values(level, result);
 567
 568                 relationInfoQueryMap.values(level, result);
 569                 superTypesMap.values(level, result);
 570                 typeHierarchyMap.values(level, result);
 571                 superRelationsMap.values(level, result);
 572                 typesMap.values(level, result);
 573
 574                 valueQueryMap.values(level, result);
 575                 directObjectsMap.values(level, result);
 576                 objectsMap.values(level, result);
 577                 orderedSetMap.values(level, result);
 578                 predicatesMap.values(level, result);
 579
 580                 statementsMap.values(level, result);
 581                 assertedPredicatesMap.values(level, result);
 582                 assertedStatementsMap.values(level, result);
 583                 externalReadEntryMap.values(level, result);
 584                 asyncReadEntryMap.values(level, result);
 585
 586                 readEntryMap.values(level, result);
 587                 asyncMultiReadEntryMap.values(level, result);
 588                 multiReadEntryMap.values(level, result);
 589
 590                 return result;
 591
 592         }
 593
 594         public void scanPending() {
 595
 596                 ArrayList<CacheEntry> entries = new ArrayList<CacheEntry>();
 597
 598                 entries.addAll(directPredicatesMap.values());
 599                 entries.addAll(directSuperRelationsMap.values());
 600                 entries.addAll(principalTypesMap.values());
 601                 entries.addAll(uRIToResourceMap.values());
 602                 //entries.addAll(namespaceIndexMap.values());
 603                 entries.addAll(childMapMap.values());
 604                 entries.addAll(relationInfoQueryMap.values());
 605                 entries.addAll(superTypesMap.values());
 606                 entries.addAll(superRelationsMap.values());
 607                 entries.addAll(typesMap.values());
 608                 entries.addAll(valueQueryMap.values());
 609                 entries.addAll(directObjectsMap.values());
 610                 entries.addAll(objectsMap.values());
 611                 entries.addAll(orderedSetMap.values());
 612                 entries.addAll(predicatesMap.values());
 613                 entries.addAll(orderedSetMap.values());
 614                 entries.addAll(statementsMap.values());
 615                 //                      entries.addAll(assertedObjectsMap.values());
 616                 entries.addAll(assertedPredicatesMap.values());
 617                 entries.addAll(assertedStatementsMap.values());
 618                 entries.addAll(externalReadEntryMap.values());
 619                 entries.addAll(asyncReadEntryMap.values());
 620                 entries.addAll(externalReadEntryMap.values());
 621                 entries.addAll(readEntryMap.values());
 622                 entries.addAll(asyncMultiReadEntryMap.values());
 623                 entries.addAll(multiReadEntryMap.values());
 624                 entries.addAll(readEntryMap.values());
 625                 System.out.println(entries.size() + " entries.");
 626                 for(Object e : entries) {
 627                         if(e instanceof CacheEntry) {
 628                                 CacheEntry en = (CacheEntry)e;
 629                                 if(en.isPending()) System.out.println("pending " + e);
 630                                 if(en.isExcepted()) System.out.println("excepted " + e);
 631                                 if(en.isDiscarded()) System.out.println("discarded " + e);
 632                                 if(en.isRefuted()) System.out.println("refuted " + e);
 633                                 if(en.isFresh()) System.out.println("fresh " + e);
 634                         } else {
 635                                 //System.out.println("Unknown object " + e);
 636                         }
 637                 }
 638         }
 639
 640         public static void waitPending(QueryProcessor processor, CacheEntry entry) throws DatabaseException {
 641
 642                 int counter = 0;
 643                 while(entry.isPending()) {
 644                         try {
 645                                 SessionTask task = null;//processor.getOwnTask(processor.thread.get());
 646                                 if(task != null) {
 647                                         task.run(processor.thread.get());
 648                                 } else {
 649                                         Thread.sleep(1);
 650                                         counter++;
 651                                         if(counter > 5000) {
 652                                                 CacheEntryBase base = ((CacheEntryBase)entry);
 653 //                                              if(base.created != null) {
 654 //                                                      System.err.println("created:");
 655 //                                                      base.created.printStackTrace();
 656 //                                              }
 657 //                                              if(base.performed != null) {
 658 //                                                      System.err.println("performed:");
 659 //                                                      base.performed.printStackTrace();
 660 //                                              }
 661 //                                              if(base.ready != null) {
 662 //                                                      System.err.println("ready:");
 663 //                                                      base.ready.printStackTrace();
 664 //                                              }
 665                                                 new Exception("Timeout waiting for request to complete: " + entry.getOriginalRequest().toString()).printStackTrace();
 666                                                 throw new DatabaseException("Timeout waiting for request to complete.");
 667                                                 //System.err.println("asd");
 668                                                 //base.getQuery().recompute(null, null, entry);
 669                                         }
 670                                 }
 671                         } catch (InterruptedException e) {
 672                         }
 673                 }
 674
 675         }
 676
 677         //////////////////////////////////////
 678
 679         static public Collection<Objects> entriesObjects(QueryProcessor processor, int r1) {
 680                 synchronized(processor.cache.objectsMap) {
 681                         return processor.cache.objectsMap.values(r1);
 682                 }
 683         }
 684
 685         static public Collection<Objects> entriesObjects(QueryProcessor processor) {
 686                 synchronized(processor.cache.objectsMap) {
 687                         return processor.cache.objectsMap.values();
 688                 }
 689         }
 690
 691         static public Collection<CacheEntry> entriesDirectPredicates(QueryProcessor processor) {
 692                 synchronized(processor.cache.directPredicatesMap) {
 693                         return processor.cache.directPredicatesMap.values();
 694                 }
 695         }
 696
 697         final static Collection<DirectObjects> entriesDirectObjects(final QueryProcessor processor, final int r1) {
 698                 DoubleKeyQueryHashMap<IntProcedure> hash = processor.cache.directObjectsMap;
 699                 return hash.values(r1);
 700         }
 701
 702         final static Collection<Statements> entriesStatements(final QueryProcessor processor, final int r1) {
 703                 return processor.cache.statementsMap.values(r1);
 704         }
 705
 706         final static Types entryTypes(final QueryProcessor processor, final int r) {
 707                 return (Types)processor.cache.typesMap.get(r);
 708         }
 709
 710         final static PrincipalTypes entryPrincipalTypes(final QueryProcessor processor, final int r) {
 711                 return (PrincipalTypes)processor.cache.principalTypesMap.get(r);
 712         }
 713
 714         final static OrderedSet entryOrderedSet(final QueryProcessor processor, final int r) {
 715                 return (OrderedSet)processor.cache.orderedSetMap.get(r);
 716         }
 717
 718         final static ValueQuery entryValueQuery(final QueryProcessor processor, final int r) {
 719                 return (ValueQuery)processor.cache.valueQueryMap.get(r);
 720         }
 721
 722         final static DirectPredicates entryDirectPredicates(final QueryProcessor processor, final int r) {
 723                 return (DirectPredicates)processor.cache.directPredicatesMap.get(r);
 724         }
 725
 726         public final static ReadEntry entryRead(final QueryProcessor processor, final Read request) {
 727                 return (ReadEntry)processor.cache.readEntryMap.get(request);
 728         }
 729
 730         public final static MultiReadEntry entryMultiRead(final QueryProcessor processor, final MultiRead request) {
 731                 return (MultiReadEntry)processor.cache.multiReadEntryMap.get(request);
 732         }
 733
 734         public final static AsyncReadEntry entryAsyncRead(final QueryProcessor processor, final AsyncRead request) {
 735                 return (AsyncReadEntry)processor.cache.asyncReadEntryMap.get(request);
 736         }
 737
 738         public final static AsyncMultiReadEntry entryAsyncMultiRead(final QueryProcessor processor, final AsyncMultiRead request) {
 739                 return (AsyncMultiReadEntry)processor.cache.asyncMultiReadEntryMap.get(request);
 740         }
 741
 742         final protected static long keyR2(long r1, long r2) {
 743         long result = (r1<<32) | (r2 & 0xffffffffL);
 744         return result;
 745     }
 746
 747         final protected static <T> T id(T o) {
 748                 return o;
 749         }
 750
 751     final protected static int keyR(int r) {
 752         return r;
 753     }
 754
 755     final protected static String keyID(String id) {
 756         return id;
 757     }
 758
 759     protected static InternalProcedure<IntSet> emptyIntSetProcedure = new InternalProcedure<IntSet>() {
 760
 761                 @Override
 762                 public void execute(ReadGraphImpl graph, IntSet result) {
 763                 }
 764
 765                 @Override
 766                 public void exception(ReadGraphImpl graph, Throwable throwable) {
 767                 }
 768
 769         };
 770
 771     protected static InternalProcedure<byte[]> emptyBytesProcedure = new InternalProcedure<byte[]>() {
 772
 773                 @Override
 774                 public void execute(ReadGraphImpl graph, byte[] bytes) {
 775                 }
 776
 777                 @Override
 778                 public void exception(ReadGraphImpl graph, Throwable throwable) {
 779                 }
 780
 781         };
 782
 783     protected static InternalProcedure<Integer> emptyIntegerProcedure = new InternalProcedure<Integer>() {
 784
 785                 @Override
 786                 public void execute(ReadGraphImpl graph, Integer i) {
 787                 }
 788
 789                 @Override
 790                 public void exception(ReadGraphImpl graph, Throwable throwable) {
 791                 }
 792
 793         };
 794
 795
 796     protected static InternalProcedure<TObjectIntHashMap<String>> emptyNamespaceProcedure = new InternalProcedure<TObjectIntHashMap<String>>() {
 797
 798                 @Override
 799                 public void execute(ReadGraphImpl graph, TObjectIntHashMap<String> i) {
 800                 }
 801
 802                 @Override
 803                 public void exception(ReadGraphImpl graph, Throwable throwable) {
 804                 }
 805
 806         };
 807
 808
 809     protected static InternalProcedure<RelationInfo> emptyRelationInfoProcedure = new InternalProcedure<RelationInfo>() {
 810
 811                 @Override
 812                 public void execute(ReadGraphImpl graph, RelationInfo i) {
 813                 }
 814
 815                 @Override
 816                 public void exception(ReadGraphImpl graph, Throwable throwable) {
 817                 }
 818
 819         };
 820
 821     protected static InternalProcedure<ObjectResourceIdMap<String>> emptyChildMapProcedure = new InternalProcedure<ObjectResourceIdMap<String>>() {
 822
 823                 @Override
 824                 public void execute(ReadGraphImpl graph, ObjectResourceIdMap<String> i) {
 825                 }
 826
 827                 @Override
 828                 public void exception(ReadGraphImpl graph, Throwable throwable) {
 829                 }
 830
 831         };
 832
 833
 834
 835         protected static IntProcedure emptyIntProcedure = new IntProcedure() {
 836
 837                 @Override
 838                 public void finished(ReadGraphImpl graph) {
 839                 }
 840
 841                 @Override
 842                 public void execute(ReadGraphImpl graph, int i) {
 843                 }
 844
 845                 @Override
 846                 public void exception(ReadGraphImpl graph, Throwable throwable) {
 847                 }
 848         };
 849
 850         protected static TripleIntProcedure emptyTripleIntProcedure = new TripleIntProcedure() {
 851
 852                 @Override
 853                 public void execute(ReadGraphImpl graph, int s, int p, int o) {
 854                 }
 855
 856                 @Override
 857                 public void finished(ReadGraphImpl graph) {
 858                 }
 859
 860                 @Override
 861                 public void exception(ReadGraphImpl graph, Throwable throwable) {
 862                 }
 863
 864         };
 865
 866     protected static AsyncProcedure<Object> emptyAsyncProcedure = new AsyncProcedure<Object>() {
 867
 868                 @Override
 869                 public void execute(AsyncReadGraph graph, Object result) {
 870                 }
 871
 872                 @Override
 873                 public void exception(AsyncReadGraph graph, Throwable throwable) {
 874                 }
 875
 876         };
 877
 878     protected static AsyncMultiProcedure<Object> emptyAsyncMultiProcedure = new AsyncMultiProcedure<Object>() {
 879
 880                 @Override
 881                 public void execute(AsyncReadGraph graph, Object result) {
 882                 }
 883
 884                 @Override
 885                 public void finished(AsyncReadGraph graph) {
 886                 }
 887
 888                 @Override
 889                 public void exception(AsyncReadGraph graph, Throwable throwable) {
 890                 }
 891
 892
 893         };
 894
 895     protected static SyncMultiProcedure<Object> emptySyncMultiProcedure = new SyncMultiProcedure<Object>() {
 896
 897                 @Override
 898                 public void execute(ReadGraph graph, Object result) {
 899                 }
 900
 901                 @Override
 902                 public void finished(ReadGraph graph) {
 903                 }
 904
 905                 @Override
 906                 public void exception(ReadGraph graph, Throwable throwable) {
 907                 }
 908
 909
 910         };
 911
 912         protected static InternalProcedure<IntSet> emptyProcedureTypes = emptyIntSetProcedure;
 913     protected static InternalProcedure<IntSet> emptyProcedureSuperTypes = emptyIntSetProcedure;
 914     protected static InternalProcedure<IntSet> emptyProcedureTypeHierarchy = emptyIntSetProcedure;
 915     protected static InternalProcedure<IntSet> emptyProcedureSuperRelations = emptyIntSetProcedure;
 916     protected static InternalProcedure<IntSet> emptyProcedurePredicates = emptyIntSetProcedure;
 917     protected static InternalProcedure<IntSet> emptyProcedureDirectPredicates = emptyIntSetProcedure;
 918
 919     protected static IntProcedure emptyProcedureObjects = emptyIntProcedure;
 920     protected static IntProcedure emptyProcedureDirectObjects = emptyIntProcedure;
 921     protected static IntProcedure emptyProcedurePrincipalTypes = emptyIntProcedure;
 922     protected static IntProcedure emptyProcedureDirectSuperRelations = emptyIntProcedure;
 923     protected static IntProcedure emptyProcedureAssertedPredicates = emptyIntProcedure;
 924     protected static IntProcedure emptyProcedureOrderedSet = emptyIntProcedure;
 925
 926     protected static TripleIntProcedure emptyProcedureStatements = emptyTripleIntProcedure;
 927     protected static TripleIntProcedure emptyProcedureAssertedStatements = emptyTripleIntProcedure;
 928
 929     protected static InternalProcedure<byte[]> emptyProcedureValueQuery = emptyBytesProcedure;
 930
 931     protected static InternalProcedure<Integer> emptyProcedureURIToResource = emptyIntegerProcedure;
 932     protected static InternalProcedure<TObjectIntHashMap<String>> emptyProcedureNamespaceIndex = emptyNamespaceProcedure;
 933     protected static InternalProcedure<ObjectResourceIdMap<String>> emptyProcedureChildMap = emptyChildMapProcedure;
 934     protected static InternalProcedure<RelationInfo> emptyProcedureRelationInfoQuery = emptyRelationInfoProcedure;
 935
 936     protected static AsyncProcedure emptyProcedureReadEntry = emptyAsyncProcedure;
 937     protected static AsyncProcedure emptyProcedureAsyncReadEntry = emptyAsyncProcedure;
 938     protected static SyncMultiProcedure emptyProcedureMultiReadEntry = emptySyncMultiProcedure;
 939     protected static AsyncMultiProcedure emptyProcedureAsyncMultiReadEntry = emptyAsyncMultiProcedure;
 940     protected static AsyncProcedure emptyProcedureExternalReadEntry = emptyAsyncProcedure;
 941
 942     static class AsyncProcedureWrapper<T> implements AsyncProcedure<T> {
 943
 944         private AsyncProcedure<T> procedure;
 945         private T result = null;
 946         private Throwable throwable = null;
 947         private Semaphore s = new Semaphore(0);
 948
 949         AsyncProcedureWrapper(AsyncProcedure<T> procedure) {
 950                 this.procedure = procedure;
 951         }
 952
 953                 @Override
 954                 public void execute(AsyncReadGraph graph, T result) {
 955                         if(procedure != null) procedure.execute(graph, result);
 956                         this.result = result;
 957                         s.release();
 958                 }
 959
 960                 @Override
 961                 public void exception(AsyncReadGraph graph, Throwable throwable) {
 962                         if(procedure != null) procedure.exception(graph, throwable);
 963                         this.throwable = throwable;
 964                         s.release();
 965                 }
 966
 967                 public T get() throws DatabaseException {
 968                         try {
 969                                 s.acquire();
 970                         } catch (InterruptedException e) {
 971                                 e.printStackTrace();
 972                         }
 973                         if(throwable != null) {
 974                                 if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
 975                                 else throw new DatabaseException(throwable);
 976                         } else {
 977                                 return result;
 978                         }
 979                 }
 980
 981     }
 982
 983     static class ExternalProcedureWrapper<T> implements AsyncProcedure<T> {
 984
 985         private Procedure<T> procedure;
 986         private T result = null;
 987         private Throwable throwable = null;
 988
 989         ExternalProcedureWrapper(Procedure<T> procedure) {
 990             this.procedure = procedure;
 991         }
 992
 993         @Override
 994         public void execute(AsyncReadGraph graph, T result) {
 995             if(procedure != null) procedure.execute(result);
 996             this.result = result;
 997         }
 998
 999         @Override
1000         public void exception(AsyncReadGraph graph, Throwable throwable) {
1001             if(procedure != null) procedure.exception(throwable);
1002             this.throwable = throwable;
1003         }
1004
1005         public T get() throws DatabaseException {
1006             if(throwable != null) {
1007                 if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1008                 else throw new DatabaseException(throwable);
1009             } else {
1010                 return result;
1011             }
1012         }
1013
1014     }
1015
1016
1017     static class InternalProcedureWrapper<T> implements InternalProcedure<T> {
1018
1019         private InternalProcedure<T> procedure;
1020         private T result = null;
1021         private Throwable throwable = null;
1022
1023         InternalProcedureWrapper(InternalProcedure<T> procedure) {
1024                 this.procedure = procedure;
1025         }
1026
1027                 @Override
1028                 public void execute(ReadGraphImpl graph, T result) throws DatabaseException {
1029                         if(procedure != null) procedure.execute(graph, result);
1030                         this.result = result;
1031                 }
1032
1033                 @Override
1034                 public void exception(ReadGraphImpl graph, Throwable throwable) throws DatabaseException {
1035                         if(procedure != null) procedure.exception(graph, throwable);
1036                         this.throwable = throwable;
1037                 }
1038
1039                 public T get() throws DatabaseException {
1040                         if(throwable != null) {
1041                                 if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1042                                 else throw new DatabaseException(throwable);
1043                         } else {
1044                                 return result;
1045                         }
1046                 }
1047
1048     }
1049
1050     static class IntSetWrapper implements IntProcedure {
1051
1052         private IntProcedure procedure;
1053         final private IntSet result;
1054         private Throwable throwable = null;
1055
1056         IntSetWrapper(ReadGraphImpl graph, IntProcedure procedure) {
1057                 this.procedure = procedure;
1058                 result = new IntSet(graph.processor.querySupport);
1059         }
1060
1061                 @Override
1062                 public void execute(ReadGraphImpl graph, int i) throws DatabaseException {
1063                         if(procedure != null) procedure.execute(graph, i);
1064                         result.add(i);
1065                 }
1066
1067                 @Override
1068                 public void exception(ReadGraphImpl graph, Throwable throwable) throws DatabaseException {
1069                         if(procedure != null) procedure.exception(graph, throwable);
1070                         this.throwable = throwable;
1071                 }
1072
1073                 @Override
1074                 public void finished(ReadGraphImpl graph) throws DatabaseException {
1075                         if(procedure != null) procedure.finished(graph);
1076                 }
1077
1078                 public IntSet get() throws DatabaseException {
1079                         if(throwable != null) {
1080                                 if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1081                                 else throw new DatabaseException(throwable);
1082                         } else {
1083                                 return result;
1084                         }
1085                 }
1086
1087     }
1088
1089     static class TripleIntProcedureWrapper implements TripleIntProcedure {
1090
1091         private TripleIntProcedure procedure;
1092         private IntArray result = new IntArray();
1093         private Throwable throwable = null;
1094
1095         TripleIntProcedureWrapper(TripleIntProcedure procedure) {
1096                 this.procedure = procedure;
1097         }
1098
1099                 @Override
1100                 public void execute(ReadGraphImpl graph, int i1, int i2, int i3) throws DatabaseException {
1101                         if(procedure != null) procedure.execute(graph, i1, i2, i3);
1102                         result.add(i1);
1103                         result.add(i2);
1104                         result.add(i3);
1105                 }
1106
1107                 @Override
1108                 public void exception(ReadGraphImpl graph, Throwable throwable) throws DatabaseException {
1109                         if(procedure != null) procedure.exception(graph, throwable);
1110                         this.throwable = throwable;
1111                 }
1112
1113                 @Override
1114                 public void finished(ReadGraphImpl graph) throws DatabaseException {
1115                         if(procedure != null) procedure.finished(graph);
1116                 }
1117
1118                 public IntArray get() throws DatabaseException {
1119                         if(throwable != null) {
1120                                 if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1121                                 else throw new DatabaseException(throwable);
1122                         } else {
1123                                 return result;
1124                         }
1125                 }
1126
1127     }
1128
1129     public static <T> T resultExternalReadEntry(ReadGraphImpl graph, ExternalRead r, CacheEntry parent, ListenerBase listener, Procedure<T> procedure) throws DatabaseException {
1130         ExternalProcedureWrapper<T> wrap = new ExternalProcedureWrapper<>(procedure);
1131         QueryCache.runnerExternalReadEntry(graph, r, parent, listener, wrap);
1132         return wrap.get();
1133     }
1134
1135     public static <T> T resultReadEntry(ReadGraphImpl graph, Read r, CacheEntry parent, ListenerBase listener, AsyncProcedure<T> procedure) throws DatabaseException {
1136         AsyncProcedureWrapper<T> wrap = new AsyncProcedureWrapper<>(procedure);
1137         QueryCache.runnerReadEntry(graph, r, parent, listener, wrap, true);
1138         return wrap.get();
1139     }
1140
1141     public static <T> T resultAsyncReadEntry(ReadGraphImpl graph, AsyncRead r, CacheEntry parent, ListenerBase listener, AsyncProcedure<T> procedure) throws DatabaseException {
1142         AsyncProcedureWrapper<T> wrap = new AsyncProcedureWrapper<>(procedure);
1143         QueryCache.runnerAsyncReadEntry(graph, r, parent, listener, wrap, true);
1144         return wrap.get();
1145     }
1146
1147     public static byte[] resultValueQuery(ReadGraphImpl graph, int r, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1148         InternalProcedureWrapper<byte[]> wrap = new InternalProcedureWrapper<>(null);
1149         QueryCache.runnerValueQuery(graph, r, parent, listener, wrap);
1150         return wrap.get();
1151     }
1152
1153     public static RelationInfo resultRelationInfoQuery(ReadGraphImpl graph, int r, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1154         InternalProcedureWrapper<RelationInfo> wrap = new InternalProcedureWrapper<>(null);
1155         QueryCache.runnerRelationInfoQuery(graph, r, parent, listener, wrap);
1156         return wrap.get();
1157     }
1158
1159     public static IntSet resultSuperRelations(ReadGraphImpl graph, int r, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1160         InternalProcedureWrapper<IntSet> wrap = new InternalProcedureWrapper<>(null);
1161         QueryCache.runnerSuperRelations(graph, r, parent, listener, wrap);
1162         return wrap.get();
1163     }
1164
1165     public static IntSet resultSuperTypes(ReadGraphImpl graph, int r, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1166         InternalProcedureWrapper<IntSet> wrap = new InternalProcedureWrapper<>(null);
1167         QueryCache.runnerSuperTypes(graph, r, parent, listener, wrap);
1168         return wrap.get();
1169     }
1170
1171     public static IntSet resultTypes(ReadGraphImpl graph, int r, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1172         InternalProcedureWrapper<IntSet> wrap = new InternalProcedureWrapper<>(null);
1173         QueryCache.runnerTypes(graph, r, parent, listener, wrap);
1174         return wrap.get();
1175     }
1176
1177     public static IntSet resultPredicates(ReadGraphImpl graph, int r, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1178         InternalProcedureWrapper<IntSet> wrap = new InternalProcedureWrapper<>(null);
1179         QueryCache.runnerPredicates(graph, r, parent, listener, wrap);
1180         return wrap.get();
1181     }
1182
1183     public static IntSet resultDirectPredicates(ReadGraphImpl graph, int r, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1184         InternalProcedureWrapper<IntSet> wrap = new InternalProcedureWrapper<>(null);
1185         QueryCache.runnerDirectPredicates(graph, r, parent, listener, wrap);
1186         return wrap.get();
1187     }
1188
1189     public static IntArray resultAssertedStatements(ReadGraphImpl graph, int r1, int r2, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1190         TripleIntProcedureWrapper wrap = new TripleIntProcedureWrapper(null);
1191         QueryCache.runnerAssertedStatements(graph, r1, r2, parent, listener, wrap);
1192         return wrap.get();
1193     }
1194
1195     public static Integer resultURIToResource(ReadGraphImpl graph, String id, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1196         InternalProcedureWrapper<Integer> wrap = new InternalProcedureWrapper<Integer>(null);
1197         QueryCache.runnerURIToResource(graph, id, parent, listener, wrap);
1198         return wrap.get();
1199     }
1200
1201     public static ObjectResourceIdMap<String> resultChildMap(ReadGraphImpl graph, int r, CacheEntry parent, ListenerBase listener) throws DatabaseException {
1202         InternalProcedureWrapper<ObjectResourceIdMap<String>> wrap = new InternalProcedureWrapper<ObjectResourceIdMap<String>>(null);
1203         QueryCache.runnerChildMap(graph, r, parent, listener, wrap);
1204         return wrap.get();
1205     }
1206
1207     static boolean shouldCache(QueryProcessor processor, int r) {
1208         return processor.isImmutable(r);
1209     }
1210
1211     static boolean shouldCache(QueryProcessor processor, int r, int r2) {
1212         return processor.isImmutable(r);
1213     }
1214
1215     static boolean shouldCache(QueryProcessor processor, Object o) {
1216         return false;
1217     }
1218
1219 }
1220