| /* |
| * 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.hugegraph.api.traversers; |
| |
| import static org.apache.hugegraph.traversal.algorithm.HugeTraverser.DEFAULT_CAPACITY; |
| import static org.apache.hugegraph.traversal.algorithm.HugeTraverser.DEFAULT_MAX_DEGREE; |
| import static org.apache.hugegraph.traversal.algorithm.HugeTraverser.DEFAULT_PATHS_LIMIT; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.hugegraph.HugeGraph; |
| import org.apache.hugegraph.api.API; |
| import org.apache.hugegraph.backend.id.Id; |
| import org.apache.hugegraph.core.GraphManager; |
| import org.apache.hugegraph.traversal.algorithm.CustomizedCrosspointsTraverser; |
| import org.apache.hugegraph.traversal.algorithm.HugeTraverser; |
| import org.apache.hugegraph.type.define.Directions; |
| import org.apache.hugegraph.util.E; |
| import org.apache.hugegraph.util.Log; |
| import org.apache.tinkerpop.gremlin.structure.Edge; |
| import org.apache.tinkerpop.gremlin.structure.Vertex; |
| import org.slf4j.Logger; |
| |
| import com.codahale.metrics.annotation.Timed; |
| import com.fasterxml.jackson.annotation.JsonAlias; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| |
| import io.swagger.v3.oas.annotations.tags.Tag; |
| import jakarta.inject.Singleton; |
| import jakarta.ws.rs.Consumes; |
| import jakarta.ws.rs.POST; |
| import jakarta.ws.rs.Path; |
| import jakarta.ws.rs.PathParam; |
| import jakarta.ws.rs.Produces; |
| import jakarta.ws.rs.core.Context; |
| |
| @Path("graphs/{graph}/traversers/customizedcrosspoints") |
| @Singleton |
| @Tag(name = "CustomizedCrosspointsAPI") |
| public class CustomizedCrosspointsAPI extends API { |
| |
| private static final Logger LOG = Log.logger(CustomizedCrosspointsAPI.class); |
| |
| private static List<CustomizedCrosspointsTraverser.PathPattern> pathPatterns( |
| HugeGraph graph, CrosspointsRequest request) { |
| int stepSize = request.pathPatterns.size(); |
| List<CustomizedCrosspointsTraverser.PathPattern> pathPatterns = new ArrayList<>(stepSize); |
| for (PathPattern pattern : request.pathPatterns) { |
| CustomizedCrosspointsTraverser.PathPattern pathPattern = |
| new CustomizedCrosspointsTraverser.PathPattern(); |
| for (Step step : pattern.steps) { |
| pathPattern.add(step.jsonToStep(graph)); |
| } |
| pathPatterns.add(pathPattern); |
| } |
| return pathPatterns; |
| } |
| |
| @POST |
| @Timed |
| @Consumes(APPLICATION_JSON) |
| @Produces(APPLICATION_JSON_WITH_CHARSET) |
| public String post(@Context GraphManager manager, |
| @PathParam("graph") String graph, |
| CrosspointsRequest request) { |
| E.checkArgumentNotNull(request, |
| "The crosspoints request body can't be null"); |
| E.checkArgumentNotNull(request.sources, |
| "The sources of crosspoints request " + |
| "can't be null"); |
| E.checkArgument(request.pathPatterns != null && |
| !request.pathPatterns.isEmpty(), |
| "The steps of crosspoints request can't be empty"); |
| |
| LOG.debug("Graph [{}] get customized crosspoints from source vertex " + |
| "'{}', with path_pattern '{}', with path '{}', with_vertex " + |
| "'{}', capacity '{}', limit '{}' and with_edge '{}'", |
| graph, request.sources, request.pathPatterns, request.withPath, |
| request.withVertex, request.capacity, request.limit, request.withEdge); |
| |
| ApiMeasurer measure = new ApiMeasurer(); |
| |
| HugeGraph g = graph(manager, graph); |
| Iterator<Vertex> sources = request.sources.vertices(g); |
| |
| CustomizedCrosspointsTraverser traverser = |
| new CustomizedCrosspointsTraverser(g); |
| |
| List<CustomizedCrosspointsTraverser.PathPattern> patterns = pathPatterns(g, request); |
| CustomizedCrosspointsTraverser.CrosspointsPaths paths = |
| traverser.crosspointsPaths(sources, patterns, request.capacity, request.limit); |
| |
| measure.addIterCount(traverser.vertexIterCounter.get(), |
| traverser.edgeIterCounter.get()); |
| |
| |
| Iterator<?> iterVertex; |
| Set<Id> vertexIds = new HashSet<>(); |
| if (request.withPath) { |
| for (HugeTraverser.Path path : paths.paths()) { |
| vertexIds.addAll(path.vertices()); |
| } |
| } else { |
| vertexIds = paths.crosspoints(); |
| } |
| if (request.withVertex && !vertexIds.isEmpty()) { |
| iterVertex = g.vertices(vertexIds.toArray()); |
| measure.addIterCount(vertexIds.size(), 0L); |
| } else { |
| iterVertex = vertexIds.iterator(); |
| } |
| |
| Iterator<?> iterEdge = Collections.emptyIterator(); |
| if (request.withPath) { |
| Set<Edge> edges = traverser.edgeResults().getEdges(paths.paths()); |
| if (request.withEdge) { |
| iterEdge = edges.iterator(); |
| } else { |
| iterEdge = HugeTraverser.EdgeRecord.getEdgeIds(edges).iterator(); |
| } |
| } |
| |
| return manager.serializer(g, measure.measures()) |
| .writeCrosspoints(paths, iterVertex, |
| iterEdge, request.withPath); |
| } |
| |
| private static class CrosspointsRequest { |
| |
| @JsonProperty("sources") |
| public Vertices sources; |
| @JsonProperty("path_patterns") |
| public List<PathPattern> pathPatterns; |
| @JsonProperty("capacity") |
| public long capacity = Long.parseLong(DEFAULT_CAPACITY); |
| @JsonProperty("limit") |
| public int limit = Integer.parseInt(DEFAULT_PATHS_LIMIT); |
| @JsonProperty("with_path") |
| public boolean withPath = false; |
| @JsonProperty("with_vertex") |
| public boolean withVertex = false; |
| @JsonProperty("with_edge") |
| public boolean withEdge = false; |
| |
| @Override |
| public String toString() { |
| return String.format("CrosspointsRequest{sourceVertex=%s," + |
| "pathPatterns=%s,withPath=%s,withVertex=%s," + |
| "capacity=%s,limit=%s,withEdge=%s}", this.sources, |
| this.pathPatterns, this.withPath, this.withVertex, |
| this.capacity, this.limit, this.withEdge); |
| } |
| } |
| |
| private static class PathPattern { |
| |
| @JsonProperty("steps") |
| public List<Step> steps; |
| |
| @Override |
| public String toString() { |
| return String.format("PathPattern{steps=%s", this.steps); |
| } |
| } |
| |
| private static class Step { |
| |
| @JsonProperty("direction") |
| public Directions direction; |
| @JsonProperty("labels") |
| public List<String> labels; |
| @JsonProperty("properties") |
| public Map<String, Object> properties; |
| @JsonAlias("degree") |
| @JsonProperty("max_degree") |
| public long maxDegree = Long.parseLong(DEFAULT_MAX_DEGREE); |
| @JsonProperty("skip_degree") |
| public long skipDegree = 0L; |
| |
| @Override |
| public String toString() { |
| return String.format("Step{direction=%s,labels=%s,properties=%s," + |
| "maxDegree=%s,skipDegree=%s}", |
| this.direction, this.labels, this.properties, |
| this.maxDegree, this.skipDegree); |
| } |
| |
| private CustomizedCrosspointsTraverser.Step jsonToStep(HugeGraph g) { |
| return new CustomizedCrosspointsTraverser.Step(g, this.direction, |
| this.labels, |
| this.properties, |
| this.maxDegree, |
| this.skipDegree); |
| } |
| } |
| } |