| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.tinkerpop.gremlin.tinkergraph.process.computer; |
| |
| import org.apache.tinkerpop.gremlin.process.computer.GraphComputer; |
| import org.apache.tinkerpop.gremlin.process.computer.MapReduce; |
| import org.apache.tinkerpop.gremlin.process.computer.Memory; |
| import org.apache.tinkerpop.gremlin.process.computer.MemoryComputeKey; |
| import org.apache.tinkerpop.gremlin.process.computer.VertexProgram; |
| import org.apache.tinkerpop.gremlin.process.computer.util.MemoryHelper; |
| import org.apache.tinkerpop.gremlin.process.traversal.Operator; |
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicLong; |
| import java.util.stream.Collectors; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class TinkerMemory implements Memory.Admin { |
| |
| public final Map<String, MemoryComputeKey> memoryKeys = new HashMap<>(); |
| public Map<String, Object> previousMap; |
| public Map<String, Object> currentMap; |
| private final AtomicInteger iteration = new AtomicInteger(0); |
| private final AtomicLong runtime = new AtomicLong(0l); |
| private boolean inExecute = false; |
| |
| public TinkerMemory(final VertexProgram<?> vertexProgram, final Set<MapReduce> mapReducers) { |
| this.currentMap = new ConcurrentHashMap<>(); |
| this.previousMap = new ConcurrentHashMap<>(); |
| if (null != vertexProgram) { |
| for (final MemoryComputeKey memoryComputeKey : vertexProgram.getMemoryComputeKeys()) { |
| this.memoryKeys.put(memoryComputeKey.getKey(), memoryComputeKey); |
| } |
| } |
| for (final MapReduce mapReduce : mapReducers) { |
| this.memoryKeys.put(mapReduce.getMemoryKey(), MemoryComputeKey.of(mapReduce.getMemoryKey(), Operator.assign, false, false)); |
| } |
| } |
| |
| @Override |
| public Set<String> keys() { |
| return this.previousMap.keySet().stream().filter(key -> !this.inExecute || this.memoryKeys.get(key).isBroadcast()).collect(Collectors.toSet()); |
| } |
| |
| @Override |
| public void incrIteration() { |
| this.iteration.getAndIncrement(); |
| } |
| |
| @Override |
| public void setIteration(final int iteration) { |
| this.iteration.set(iteration); |
| } |
| |
| @Override |
| public int getIteration() { |
| return this.iteration.get(); |
| } |
| |
| @Override |
| public void setRuntime(final long runTime) { |
| this.runtime.set(runTime); |
| } |
| |
| @Override |
| public long getRuntime() { |
| return this.runtime.get(); |
| } |
| |
| protected void complete() { |
| this.iteration.decrementAndGet(); |
| this.previousMap = this.currentMap; |
| this.memoryKeys.values().stream().filter(MemoryComputeKey::isTransient).forEach(computeKey -> this.previousMap.remove(computeKey.getKey())); |
| } |
| |
| protected void completeSubRound() { |
| this.previousMap = new ConcurrentHashMap<>(this.currentMap); |
| this.inExecute = !this.inExecute; |
| } |
| |
| @Override |
| public boolean isInitialIteration() { |
| return this.getIteration() == 0; |
| } |
| |
| @Override |
| public <R> R get(final String key) throws IllegalArgumentException { |
| final R r = (R) this.previousMap.get(key); |
| if (null == r) |
| throw Memory.Exceptions.memoryDoesNotExist(key); |
| else if (this.inExecute && !this.memoryKeys.get(key).isBroadcast()) |
| throw Memory.Exceptions.memoryDoesNotExist(key); |
| else |
| return r; |
| } |
| |
| @Override |
| public void set(final String key, final Object value) { |
| checkKeyValue(key, value); |
| if (this.inExecute) |
| throw Memory.Exceptions.memorySetOnlyDuringVertexProgramSetUpAndTerminate(key); |
| this.currentMap.put(key, value); |
| } |
| |
| @Override |
| public void add(final String key, final Object value) { |
| checkKeyValue(key, value); |
| if (!this.inExecute) |
| throw Memory.Exceptions.memoryAddOnlyDuringVertexProgramExecute(key); |
| this.currentMap.compute(key, (k, v) -> null == v ? value : this.memoryKeys.get(key).getReducer().apply(v, value)); |
| } |
| |
| @Override |
| public String toString() { |
| return StringFactory.memoryString(this); |
| } |
| |
| private void checkKeyValue(final String key, final Object value) { |
| if (!this.memoryKeys.containsKey(key)) |
| throw GraphComputer.Exceptions.providedKeyIsNotAMemoryComputeKey(key); |
| MemoryHelper.validateValue(value); |
| } |
| } |