| /** |
| * 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.falcon.metadata; |
| |
| import com.tinkerpop.blueprints.Direction; |
| import com.tinkerpop.blueprints.Edge; |
| import com.tinkerpop.blueprints.Graph; |
| import com.tinkerpop.blueprints.Vertex; |
| import com.tinkerpop.blueprints.util.io.graphson.GraphSONWriter; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /** |
| * Utility class for graph operations. |
| */ |
| public final class GraphUtils { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(GraphUtils.class); |
| |
| private GraphUtils() { |
| } |
| |
| public static void dumpToLog(final Graph graph) { |
| LOG.debug("Vertices of {}", graph); |
| for (Vertex vertex : graph.getVertices()) { |
| LOG.debug(vertexString(vertex)); |
| } |
| |
| LOG.debug("Edges of {}", graph); |
| for (Edge edge : graph.getEdges()) { |
| LOG.debug(edgeString(edge)); |
| } |
| } |
| |
| public static void dump(final Graph graph) throws IOException { |
| dump(graph, System.out); |
| } |
| |
| public static void dump(final Graph graph, OutputStream outputStream) throws IOException { |
| GraphSONWriter.outputGraph(graph, outputStream); |
| } |
| |
| public static void dump(final Graph graph, String fileName) throws IOException { |
| GraphSONWriter.outputGraph(graph, fileName); |
| } |
| |
| public static String vertexString(final Vertex vertex) { |
| StringBuilder properties = new StringBuilder(); |
| for (String propertyKey : vertex.getPropertyKeys()) { |
| properties.append(propertyKey) |
| .append("=").append(vertex.getProperty(propertyKey)) |
| .append(", "); |
| } |
| |
| return "v[" + vertex.getId() + "], Properties[" + properties + "]"; |
| } |
| |
| public static String edgeString(final Edge edge) { |
| return "e[" + edge.getLabel() + "], [" |
| + edge.getVertex(Direction.OUT).getProperty("name") |
| + " -> " + edge.getLabel() + " -> " |
| + edge.getVertex(Direction.IN).getProperty("name") |
| + "]"; |
| } |
| } |