yoshi | 28bac13 | 2014-01-22 11:00:17 -0800 | [diff] [blame] | 1 | package com.tinkerpop.blueprints.impls.ramcloud; |
| 2 | |
| 3 | import java.io.Serializable; |
| 4 | import java.nio.ByteBuffer; |
| 5 | import java.nio.ByteOrder; |
| 6 | import java.util.ArrayList; |
| 7 | import java.util.Arrays; |
| 8 | import java.util.HashMap; |
| 9 | import java.util.HashSet; |
| 10 | import java.util.LinkedList; |
| 11 | import java.util.List; |
| 12 | import java.util.Map; |
| 13 | import java.util.Map.Entry; |
| 14 | import java.util.Set; |
| 15 | |
| 16 | import org.slf4j.Logger; |
| 17 | import org.slf4j.LoggerFactory; |
| 18 | |
| 19 | import com.google.protobuf.InvalidProtocolBufferException; |
| 20 | import com.tinkerpop.blueprints.Direction; |
| 21 | import com.tinkerpop.blueprints.Edge; |
| 22 | import com.tinkerpop.blueprints.Vertex; |
| 23 | import com.tinkerpop.blueprints.VertexQuery; |
| 24 | import com.tinkerpop.blueprints.impls.ramcloud.RamCloudGraphProtos.EdgeListProtoBuf; |
| 25 | import com.tinkerpop.blueprints.impls.ramcloud.RamCloudGraphProtos.EdgeProtoBuf; |
| 26 | import com.tinkerpop.blueprints.util.DefaultVertexQuery; |
| 27 | import com.tinkerpop.blueprints.util.ExceptionFactory; |
| 28 | import com.tinkerpop.blueprints.impls.ramcloud.PerfMon; |
| 29 | |
| 30 | import edu.stanford.ramcloud.JRamCloud; |
| 31 | import edu.stanford.ramcloud.JRamCloud.MultiWriteObject; |
| 32 | import edu.stanford.ramcloud.JRamCloud.RejectRules; |
| 33 | import edu.stanford.ramcloud.JRamCloud.WrongVersionException; |
| 34 | |
| 35 | public class RamCloudVertex extends RamCloudElement implements Vertex, Serializable { |
| 36 | |
| 37 | private final static Logger log = LoggerFactory.getLogger(RamCloudGraph.class); |
| 38 | private static final long serialVersionUID = 7526472295622776147L; |
| 39 | protected long id; |
| 40 | protected byte[] rcKey; |
| 41 | private RamCloudGraph graph; |
| 42 | |
| 43 | private Versioned<EdgeListProtoBuf> cachedAdjEdgeList; |
| 44 | |
| 45 | public RamCloudVertex(long id, RamCloudGraph graph) { |
| 46 | super(idToRcKey(id), graph.vertPropTableId, graph); |
| 47 | |
| 48 | this.id = id; |
| 49 | this.rcKey = idToRcKey(id); |
| 50 | this.graph = graph; |
| 51 | this.cachedAdjEdgeList = null; |
| 52 | } |
| 53 | |
| 54 | public RamCloudVertex(byte[] rcKey, RamCloudGraph graph) { |
| 55 | super(rcKey, graph.vertPropTableId, graph); |
| 56 | |
| 57 | this.id = rcKeyToId(rcKey); |
| 58 | this.rcKey = rcKey; |
| 59 | this.graph = graph; |
| 60 | this.cachedAdjEdgeList = null; |
| 61 | } |
| 62 | |
| 63 | |
| 64 | /* |
| 65 | * Vertex interface implementation |
| 66 | */ |
| 67 | @Override |
| 68 | public Edge addEdge(String label, Vertex inVertex) { |
| 69 | return graph.addEdge(null, this, inVertex, label); |
| 70 | } |
| 71 | |
| 72 | @Override |
| 73 | public Iterable<Edge> getEdges(Direction direction, String... labels) { |
| 74 | return new ArrayList<Edge>(getEdgeList(direction, labels)); |
| 75 | } |
| 76 | |
| 77 | @Override |
| 78 | public Iterable<Vertex> getVertices(Direction direction, String... labels) { |
| 79 | List<RamCloudEdge> edges = getEdgeList(direction, labels); |
| 80 | List<Vertex> neighbors = new LinkedList<Vertex>(); |
| 81 | for (RamCloudEdge edge : edges) { |
| 82 | neighbors.add(edge.getNeighbor(this)); |
| 83 | } |
| 84 | return neighbors; |
| 85 | } |
| 86 | |
| 87 | @Override |
| 88 | public VertexQuery query() { |
| 89 | return new DefaultVertexQuery(this); |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * RamCloudElement overridden methods |
| 94 | */ |
| 95 | @Override |
| 96 | public Object getId() { |
| 97 | return id; |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public void remove() { |
| 102 | Set<RamCloudEdge> edges = getEdgeSet(); |
| 103 | |
| 104 | // neighbor vertex -> List of Edges to remove |
| 105 | Map<RamCloudVertex, List<RamCloudEdge>> vertexToEdgesMap = new HashMap<RamCloudVertex, List<RamCloudEdge>>( edges.size() ); |
| 106 | |
| 107 | // Batch edges together by neighbor vertex |
| 108 | for (RamCloudEdge edge : edges) { |
| 109 | RamCloudVertex neighbor = (RamCloudVertex) edge.getNeighbor(this); |
| 110 | List<RamCloudEdge> edgeList = vertexToEdgesMap.get(neighbor); |
| 111 | |
| 112 | if (edgeList == null) { |
| 113 | edgeList = new LinkedList<RamCloudEdge>(); |
| 114 | } |
| 115 | |
| 116 | edgeList.add(edge); |
| 117 | vertexToEdgesMap.put(neighbor, edgeList); |
| 118 | } |
| 119 | |
| 120 | // Remove batches of edges at a time by neighbor vertex |
| 121 | for (Entry<RamCloudVertex, List<RamCloudEdge>> entry : vertexToEdgesMap.entrySet()) { |
| 122 | // Skip over loopback edges to ourself |
| 123 | if (!entry.getKey().equals(this)) { |
| 124 | entry.getKey().removeEdgesFromAdjList(entry.getValue()); |
| 125 | } |
| 126 | |
| 127 | // Remove this batch of edges from the edge property table |
| 128 | for (RamCloudEdge edge : entry.getValue()) { |
| 129 | edge.removeProperties(); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | Map<String,Object> props = this.getPropertyMap(); |
| 134 | for( Map.Entry<String,Object> entry : props.entrySet() ) { |
| 135 | if ( !graph.indexedKeys.contains(entry.getKey() ) ) continue; |
| 136 | RamCloudKeyIndex keyIndex = new RamCloudKeyIndex(graph.kidxVertTableId, entry.getKey(), entry.getValue(), graph, Vertex.class); |
| 137 | keyIndex.remove(entry.getKey(), entry.getValue(), this); |
| 138 | } |
| 139 | |
| 140 | // Remove ourselves entirely from the vertex table |
| 141 | graph.getRcClient().remove(graph.vertTableId, rcKey); |
| 142 | |
| 143 | super.remove(); |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | * Object overridden methods |
| 148 | */ |
| 149 | @Override |
| 150 | public boolean equals(Object obj) { |
| 151 | if (this == obj) { |
| 152 | return true; |
| 153 | } |
| 154 | if (obj == null) { |
| 155 | return false; |
| 156 | } |
| 157 | if (getClass() != obj.getClass()) { |
| 158 | return false; |
| 159 | } |
| 160 | RamCloudVertex other = (RamCloudVertex) obj; |
| 161 | return (id == other.id); |
| 162 | } |
| 163 | |
| 164 | @Override |
| 165 | public int hashCode() { |
| 166 | return Long.valueOf(id).hashCode(); |
| 167 | } |
| 168 | |
| 169 | @Override |
| 170 | public String toString() { |
| 171 | return "RamCloudVertex [id=" + id + "]"; |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | * RamCloudVertex specific methods |
| 176 | */ |
| 177 | private static byte[] idToRcKey(long id) { |
| 178 | return ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN).putLong(id).array(); |
| 179 | } |
| 180 | |
| 181 | private static long rcKeyToId(byte[] rcKey) { |
| 182 | return ByteBuffer.wrap(rcKey).order(ByteOrder.LITTLE_ENDIAN).getLong(); |
| 183 | } |
| 184 | |
| 185 | boolean addEdgeToAdjList(RamCloudEdge edge) { |
| 186 | List<RamCloudEdge> edgesToAdd = new ArrayList<RamCloudEdge>(1); |
| 187 | edgesToAdd.add(edge); |
| 188 | return addEdgesToAdjList(edgesToAdd); |
| 189 | } |
| 190 | boolean removeEdgeFromAdjList(RamCloudEdge edge) { |
| 191 | List<RamCloudEdge> edgesToRemove = new ArrayList<RamCloudEdge>(1); |
| 192 | edgesToRemove.add(edge); |
| 193 | return removeEdgesFromAdjList(edgesToRemove); |
| 194 | } |
| 195 | |
| 196 | private boolean addEdgesToAdjList(List<RamCloudEdge> edgesToAdd) { |
| 197 | return updateEdgeAdjList(edgesToAdd, true); |
| 198 | } |
| 199 | private boolean removeEdgesFromAdjList(List<RamCloudEdge> edgesToAdd) { |
| 200 | return updateEdgeAdjList(edgesToAdd, false); |
| 201 | } |
| 202 | |
| 203 | /** Conditionally update Adj. Edge List |
| 204 | * @return true if EdgeAdjList was logically modified.(Cache update does not imply true return) |
| 205 | */ |
| 206 | private boolean updateEdgeAdjList(List<RamCloudEdge> edgesToModify, boolean add) { |
| 207 | PerfMon pm = PerfMon.getInstance(); |
| 208 | JRamCloud rcClient = graph.getRcClient(); |
| 209 | final int MAX_RETRIES = 100; |
| 210 | for (int retry = 1 ; retry <= MAX_RETRIES ; ++retry ) { |
| 211 | Set<RamCloudEdge> edges; |
| 212 | long expected_version = 0L; |
| 213 | if ( this.cachedAdjEdgeList == null ) { |
| 214 | edges = new HashSet<RamCloudEdge>(); |
| 215 | } else { |
| 216 | expected_version = this.cachedAdjEdgeList.getVersion(); |
| 217 | if ( expected_version == 0L && add == false ) { |
| 218 | updateCachedAdjEdgeList(); |
| 219 | expected_version = this.cachedAdjEdgeList.getVersion(); |
| 220 | } |
| 221 | edges = buildEdgeSetFromProtobuf(this.cachedAdjEdgeList.getValue(), Direction.BOTH); |
| 222 | } |
| 223 | if ( expected_version == 0L && add == false ) { |
| 224 | updateCachedAdjEdgeList(); |
| 225 | expected_version = this.cachedAdjEdgeList.getVersion(); |
| 226 | edges = buildEdgeSetFromProtobuf(this.cachedAdjEdgeList.getValue(), Direction.BOTH); |
| 227 | } |
| 228 | //log.debug( (add?"Adding":"Removing") + " edges to: {"+ edges+ "}"); |
| 229 | |
| 230 | try { |
| 231 | if ( add ) { |
| 232 | if (edges.addAll(edgesToModify) == false) { |
| 233 | log.warn("{}: There aren't any changes to edges ({})", this, edgesToModify); |
| 234 | return false; |
| 235 | } |
| 236 | } else { |
| 237 | if (edges.removeAll(edgesToModify) == false) { |
| 238 | log.warn("{}: There aren't any changes to edges ({})", this, edgesToModify); |
| 239 | return false; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | EdgeListProtoBuf edgeList = buildProtoBufFromEdgeSet(edges); |
| 244 | JRamCloud.RejectRules rules = rcClient.new RejectRules(); |
| 245 | if ( expected_version == 0L ) { |
| 246 | rules.setExists(); |
| 247 | } else { |
| 248 | rules.setNeVersion(expected_version); |
| 249 | } |
| 250 | pm.write_start("RAMCloudVertex updateEdgeAdjList()"); |
| 251 | long updated_version = rcClient.writeRule(graph.vertTableId, rcKey, edgeList.toByteArray(), rules); |
| 252 | pm.write_end("RAMCloudVertex updateEdgeAdjList()"); |
| 253 | this.cachedAdjEdgeList.setValue(edgeList, updated_version); |
| 254 | return true; |
| 255 | } catch (UnsupportedOperationException e) { |
| 256 | pm.write_end("RAMCloudVertex updateEdgeAdjList()"); |
| 257 | pm.write_condfail("RAMCloudVertex updateEdgeAdjList()"); |
| 258 | log.error("{" + toString() + "}: Failed to modify a set of edges ({" + edgesToModify + "}): ", e); |
| 259 | return false; |
| 260 | } catch (ClassCastException e) { |
| 261 | pm.write_end("RAMCloudVertex updateEdgeAdjList()"); |
| 262 | pm.write_condfail("RAMCloudVertex updateEdgeAdjList()"); |
| 263 | log.error("{" + toString() + "}: Failed to modify a set of edges ({" + edgesToModify + "}): ", e); |
| 264 | return false; |
| 265 | } catch (NullPointerException e) { |
| 266 | pm.write_end("RAMCloudVertex updateEdgeAdjList()"); |
| 267 | pm.write_condfail("RAMCloudVertex updateEdgeAdjList()"); |
| 268 | log.error("{" + toString() + "}: Failed to modify a set of edges ({" + edgesToModify + "}): ", e); |
| 269 | return false; |
| 270 | } catch (Exception e) { |
| 271 | pm.write_end("RAMCloudVertex updateEdgeAdjList()"); |
| 272 | pm.write_condfail("RAMCloudVertex updateEdgeAdjList()"); |
| 273 | // FIXME Workaround for native method exception declaration bug |
| 274 | if ( e instanceof WrongVersionException ) { |
| 275 | log.debug("Conditional Updating EdgeList failed for {} RETRYING {}", this, retry); |
| 276 | //log.debug("Conditional Updating EdgeList failed for {} modifing {} RETRYING [{}]", this, edgesToModify, retry); |
| 277 | updateCachedAdjEdgeList(); |
| 278 | } else { |
| 279 | log.debug("Cond. Write to modify adj edge list failed, exception thrown", e); |
| 280 | updateCachedAdjEdgeList(); |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | log.error("Conditional Updating EdgeList failed for {} gave up RETRYING", this); |
| 285 | return false; |
| 286 | } |
| 287 | |
| 288 | /** Get all adj.edge list |
| 289 | * Method is exposed to package namespace to do Vertex removal efficiently; |
| 290 | */ |
| 291 | Set<RamCloudEdge> getEdgeSet() { |
| 292 | return getVersionedEdgeSet(Direction.BOTH).getValue(); |
| 293 | } |
| 294 | |
| 295 | private Versioned<EdgeListProtoBuf> updateCachedAdjEdgeList() { |
| 296 | JRamCloud.Object vertTableEntry; |
| 297 | EdgeListProtoBuf edgeList; |
| 298 | |
| 299 | PerfMon pm = PerfMon.getInstance(); |
| 300 | try { |
| 301 | JRamCloud vertTable = graph.getRcClient(); |
| 302 | pm.read_start("RamCloudVertex updateCachedAdjEdgeList()"); |
| 303 | vertTableEntry = vertTable.read(graph.vertTableId, rcKey); |
| 304 | pm.read_end("RamCloudVertex updateCachedAdjEdgeList()"); |
| 305 | } catch (Exception e) { |
| 306 | pm.read_end("RamCloudVertex updateCachedAdjEdgeList()"); |
| 307 | log.error("{" + toString() + "}: Error reading vertex table entry: ", e); |
| 308 | return null; |
| 309 | } |
| 310 | |
| 311 | try { |
| 312 | pm.protodeser_start("RamCloudVertex updateCachedAdjEdgeList()"); |
| 313 | edgeList = EdgeListProtoBuf.parseFrom(vertTableEntry.value); |
| 314 | Versioned<EdgeListProtoBuf> updatedEdgeList = new Versioned<EdgeListProtoBuf>(edgeList, vertTableEntry.version); |
| 315 | this.cachedAdjEdgeList = updatedEdgeList; |
| 316 | pm.protodeser_end("RamCloudVertex updateCachedAdjEdgeList()"); |
| 317 | return updatedEdgeList; |
| 318 | } catch (InvalidProtocolBufferException e) { |
| 319 | pm.protodeser_end("RamCloudVertex updateCachedAdjEdgeList()"); |
| 320 | log.error("{" + toString() + "}: Read malformed edge list: ", e); |
| 321 | return null; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | private Versioned<Set<RamCloudEdge>> getVersionedEdgeSet(Direction direction, String... labels) { |
| 326 | Versioned<EdgeListProtoBuf> cachedEdgeList = updateCachedAdjEdgeList(); |
| 327 | return new Versioned<Set<RamCloudEdge>>(buildEdgeSetFromProtobuf(cachedEdgeList.getValue(), direction, labels), cachedEdgeList.getVersion() ); |
| 328 | } |
| 329 | |
| 330 | private Set<RamCloudEdge> buildEdgeSetFromProtobuf(EdgeListProtoBuf edgeList, |
| 331 | Direction direction, String... labels) { |
| 332 | PerfMon pm = PerfMon.getInstance(); |
| 333 | long startTime = 0; |
| 334 | if(RamCloudGraph.measureSerializeTimeProp == 1) { |
| 335 | startTime = System.nanoTime(); |
| 336 | } |
| 337 | pm.protodeser_start("RamCloudVertex buildEdgeSetFromProtobuf()"); |
| 338 | Set<RamCloudEdge> edgeSet = new HashSet<RamCloudEdge>( edgeList.getEdgeCount() ); |
| 339 | for (EdgeProtoBuf edge : edgeList.getEdgeList()) { |
| 340 | if ((direction.equals(Direction.BOTH) || (edge.getOutgoing() ^ direction.equals(Direction.IN))) |
| 341 | && (labels.length == 0 || Arrays.asList(labels).contains(edge.getLabel()))) { |
| 342 | RamCloudVertex neighbor = new RamCloudVertex(edge.getNeighborId(), graph); |
| 343 | if (edge.getOutgoing()) { |
| 344 | edgeSet.add(new RamCloudEdge(this, neighbor, edge.getLabel(), graph)); |
| 345 | } else { |
| 346 | edgeSet.add(new RamCloudEdge(neighbor, this, edge.getLabel(), graph)); |
| 347 | } |
| 348 | } |
| 349 | } |
| 350 | pm.protodeser_end("RamCloudVertex buildEdgeSetFromProtobuf()"); |
| 351 | if(RamCloudGraph.measureSerializeTimeProp == 1) { |
| 352 | long endTime = System.nanoTime(); |
| 353 | log.error("Performance buildEdgeSetFromProtobuf key {}, {}, size={}", this, endTime - startTime, edgeList.getSerializedSize()); |
| 354 | } |
| 355 | return edgeSet; |
| 356 | } |
| 357 | |
| 358 | |
| 359 | |
| 360 | private EdgeListProtoBuf buildProtoBufFromEdgeSet(Set<RamCloudEdge> edgeSet) { |
| 361 | PerfMon pm = PerfMon.getInstance(); |
| 362 | long startTime = 0; |
| 363 | if(RamCloudGraph.measureSerializeTimeProp == 1) { |
| 364 | startTime = System.nanoTime(); |
| 365 | } |
| 366 | |
| 367 | pm.protoser_start("RamCloudVertex buildProtoBufFromEdgeSet()"); |
| 368 | |
| 369 | EdgeListProtoBuf.Builder edgeListBuilder = EdgeListProtoBuf.newBuilder(); |
| 370 | EdgeProtoBuf.Builder edgeBuilder = EdgeProtoBuf.newBuilder(); |
| 371 | |
| 372 | for (Edge edge : edgeSet) { |
| 373 | if (edge.getVertex(Direction.OUT).equals(this) || edge.getVertex(Direction.IN).equals(this)) { |
| 374 | if (edge.getVertex(Direction.OUT).equals(edge.getVertex(Direction.IN))) { |
| 375 | edgeBuilder.setNeighborId(id); |
| 376 | edgeBuilder.setOutgoing(true); |
| 377 | edgeBuilder.setLabel(edge.getLabel()); |
| 378 | edgeListBuilder.addEdge(edgeBuilder.build()); |
| 379 | |
| 380 | edgeBuilder.setOutgoing(false); |
| 381 | edgeListBuilder.addEdge(edgeBuilder.build()); |
| 382 | } else { |
| 383 | if (edge.getVertex(Direction.OUT).equals(this)) { |
| 384 | edgeBuilder.setNeighborId((Long) edge.getVertex(Direction.IN).getId()); |
| 385 | edgeBuilder.setOutgoing(true); |
| 386 | edgeBuilder.setLabel(edge.getLabel()); |
| 387 | edgeListBuilder.addEdge(edgeBuilder.build()); |
| 388 | } else { |
| 389 | edgeBuilder.setNeighborId((Long) edge.getVertex(Direction.OUT).getId()); |
| 390 | edgeBuilder.setOutgoing(false); |
| 391 | edgeBuilder.setLabel(edge.getLabel()); |
| 392 | edgeListBuilder.addEdge(edgeBuilder.build()); |
| 393 | } |
| 394 | } |
| 395 | } else { |
| 396 | log.warn("{}: Tried to add an edge unowned by this vertex ({})", this, edge); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | EdgeListProtoBuf buf = edgeListBuilder.build(); |
| 401 | pm.protoser_end("RamCloudVertex buildProtoBufFromEdgeSet"); |
| 402 | if(RamCloudGraph.measureSerializeTimeProp == 1) { |
| 403 | long endTime = System.nanoTime(); |
| 404 | log.error("Performance buildProtoBufFromEdgeSet key {}, {}, size={}", this, endTime - startTime, buf.getSerializedSize()); |
| 405 | } |
| 406 | return buf; |
| 407 | } |
| 408 | |
| 409 | @Deprecated |
| 410 | private List<RamCloudEdge> getEdgeList() { |
| 411 | return getEdgeList(Direction.BOTH); |
| 412 | } |
| 413 | |
| 414 | private List<RamCloudEdge> getEdgeList(Direction direction, String... labels) { |
| 415 | |
| 416 | Versioned<EdgeListProtoBuf> cachedEdgeList = updateCachedAdjEdgeList(); |
| 417 | PerfMon pm = PerfMon.getInstance(); |
| 418 | pm.protodeser_start("RamCloudVertex getEdgeList()"); |
| 419 | |
| 420 | List<RamCloudEdge> edgeList = new ArrayList<RamCloudEdge>(cachedEdgeList.getValue().getEdgeCount()); |
| 421 | |
| 422 | for (EdgeProtoBuf edge : cachedEdgeList.getValue().getEdgeList()) { |
| 423 | if ((direction.equals(Direction.BOTH) || (edge.getOutgoing() ^ direction.equals(Direction.IN))) |
| 424 | && (labels.length == 0 || Arrays.asList(labels).contains(edge.getLabel()))) { |
| 425 | RamCloudVertex neighbor = new RamCloudVertex(edge.getNeighborId(), graph); |
| 426 | if (edge.getOutgoing()) { |
| 427 | edgeList.add(new RamCloudEdge(this, neighbor, edge.getLabel(), graph)); |
| 428 | } else { |
| 429 | edgeList.add(new RamCloudEdge(neighbor, this, edge.getLabel(), graph)); |
| 430 | } |
| 431 | } |
| 432 | } |
| 433 | pm.protodeser_end("RamCloudVertex getEdgeList()"); |
| 434 | |
| 435 | return edgeList; |
| 436 | } |
| 437 | |
| 438 | protected boolean exists() { |
| 439 | boolean vertTableEntryExists = false; |
| 440 | boolean vertPropTableEntryExists = false; |
| 441 | |
| 442 | PerfMon pm = PerfMon.getInstance(); |
| 443 | JRamCloud vertTable = graph.getRcClient(); |
| 444 | try { |
| 445 | pm.read_start("RamCloudVertex exists()"); |
| 446 | vertTable.read(graph.vertTableId, rcKey); |
| 447 | pm.read_end("RamCloudVertex exists()"); |
| 448 | vertTableEntryExists = true; |
| 449 | } catch (Exception e) { |
| 450 | // Vertex table entry does not exist |
| 451 | pm.read_end("RamCloudVertex exists()"); |
| 452 | } |
| 453 | |
| 454 | try { |
| 455 | pm.read_start("RamCloudVertex exists()"); |
| 456 | vertTable.read(graph.vertPropTableId, rcKey); |
| 457 | pm.read_end("RamCloudVertex exists()"); |
| 458 | vertPropTableEntryExists = true; |
| 459 | } catch (Exception e) { |
| 460 | // Vertex property table entry does not exist |
| 461 | pm.read_end("RamCloudVertex exists()"); |
| 462 | } |
| 463 | |
| 464 | if (vertTableEntryExists && vertPropTableEntryExists) { |
| 465 | return true; |
| 466 | } else if (!vertTableEntryExists && !vertPropTableEntryExists) { |
| 467 | return false; |
| 468 | } else { |
| 469 | log.warn("{}: Detected RamCloudGraph inconsistency: vertTableEntryExists={}, vertPropTableEntryExists={}.", this, vertTableEntryExists, vertPropTableEntryExists); |
| 470 | return true; |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | protected void create() throws IllegalArgumentException { |
| 475 | // TODO: Existence check costs extra (presently 2 reads), could use option to turn on/off |
| 476 | if (!exists()) { |
| 477 | PerfMon pm = PerfMon.getInstance(); |
| 478 | JRamCloud vertTable = graph.getRcClient(); |
| 479 | MultiWriteObject[] mwo = new MultiWriteObject[2]; |
| 480 | mwo[0] = new MultiWriteObject(graph.vertTableId, rcKey, ByteBuffer.allocate(0).array(), null); |
| 481 | mwo[1] = new MultiWriteObject(graph.vertPropTableId, rcKey, ByteBuffer.allocate(0).array(), null); |
| 482 | pm.multiwrite_start("RamCloudVertex create()"); |
| 483 | vertTable.multiWrite(mwo); |
| 484 | pm.multiwrite_end("RamCloudVertex create()"); |
| 485 | } else { |
| 486 | throw ExceptionFactory.vertexWithIdAlreadyExists(id); |
| 487 | } |
| 488 | } |
| 489 | |
| 490 | public void debugPrintEdgeList() { |
| 491 | List<RamCloudEdge> edgeList = getEdgeList(); |
| 492 | |
| 493 | log.debug("{}: Debug Printing Edge List...", this); |
| 494 | for (RamCloudEdge edge : edgeList) { |
| 495 | System.out.println(edge.toString()); |
| 496 | } |
| 497 | } |
| 498 | } |