| /* |
| * 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.hadoop.jsr223; |
| |
| import org.apache.tinkerpop.gremlin.groovy.loaders.SugarLoader; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopGraph; |
| import org.apache.tinkerpop.gremlin.jsr223.console.GremlinShellEnvironment; |
| import org.apache.tinkerpop.gremlin.jsr223.console.RemoteAcceptor; |
| import org.apache.tinkerpop.gremlin.jsr223.console.RemoteException; |
| import org.apache.tinkerpop.gremlin.process.computer.ComputerResult; |
| import org.apache.tinkerpop.gremlin.process.computer.traversal.TraversalVertexProgram; |
| import org.apache.tinkerpop.gremlin.process.computer.traversal.step.map.ComputerResultStep; |
| import org.apache.tinkerpop.gremlin.process.computer.traversal.strategy.decoration.VertexProgramStrategy; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalSource; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.util.EmptyStep; |
| import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class HadoopRemoteAcceptor implements RemoteAcceptor { |
| |
| private static final String USE_SUGAR = "useSugar"; |
| private static final String USE_TRAVERSAL_SOURCE = "useTraversalSource"; |
| private static final String HELP = "help"; |
| private static final String SPACE = " "; |
| |
| private HadoopGraph hadoopGraph; |
| private GremlinShellEnvironment shellEnvironment; |
| private boolean useSugar = false; |
| private TraversalSource traversalSource; |
| |
| public HadoopRemoteAcceptor(final GremlinShellEnvironment shellEnvironment) { |
| this.shellEnvironment = shellEnvironment; |
| } |
| |
| @Override |
| public Object connect(final List<String> args) throws RemoteException { |
| if (args.size() != 1 && args.size() != 2) { |
| throw new IllegalArgumentException("Usage: :remote connect " + HadoopGremlinPlugin.NAME + " <variable name of graph> <optional variable name of traversal source>"); |
| } |
| this.hadoopGraph = this.shellEnvironment.getVariable(args.get(0)); |
| if (args.size() == 2) |
| this.traversalSource = this.shellEnvironment.getVariable(args.get(1)); |
| else |
| this.traversalSource = this.hadoopGraph.traversal(); |
| /// |
| final HashMap<String, Object> configuration = new HashMap<>(); |
| configuration.put(USE_SUGAR, this.useSugar); |
| configuration.put(USE_TRAVERSAL_SOURCE, this.traversalSource); |
| return Collections.unmodifiableMap(configuration); |
| } |
| |
| @Override |
| public Object configure(final List<String> args) throws RemoteException { |
| if (args.size() == 1 && args.get(0).equals(HELP)) |
| return ":remote config [useSugar [true|false]|useTraversalSource <traversalSourceName>|help]"; |
| |
| for (int i = 0; i < args.size(); i = i + 2) { |
| if (args.get(i).equals(USE_SUGAR)) |
| this.useSugar = Boolean.valueOf(args.get(i + 1)); |
| else if (args.get(i).equals(USE_TRAVERSAL_SOURCE)) { |
| this.traversalSource = this.shellEnvironment.getVariable(args.get(i + 1)); |
| } else |
| throw new IllegalArgumentException("The provided configuration is unknown: " + args.get(i) + ":" + args.get(i + 1)); |
| } |
| /// |
| final HashMap<String, Object> configuration = new HashMap<>(); |
| configuration.put(USE_SUGAR, this.useSugar); |
| configuration.put(USE_TRAVERSAL_SOURCE, this.traversalSource); |
| return Collections.unmodifiableMap(configuration); |
| } |
| |
| @Override |
| public Object submit(final List<String> args) throws RemoteException { |
| try { |
| String script = getScript(String.join(SPACE, args), this.shellEnvironment); |
| if (this.useSugar) |
| script = SugarLoader.class.getCanonicalName() + ".load()\n" + script; |
| final TraversalVertexProgram program = TraversalVertexProgram.build().traversal(this.traversalSource, "gremlin-groovy", script).create(this.hadoopGraph); |
| final ComputerResult computerResult = VertexProgramStrategy.getComputer(this.traversalSource.getStrategies()).get().apply(this.hadoopGraph).program(program).submit().get(); |
| this.shellEnvironment.setVariable(RESULT, computerResult); |
| /// |
| final Traversal.Admin<ComputerResult, ?> traversal = new DefaultTraversal<>(computerResult.graph()); |
| traversal.addStep(new ComputerResultStep<>(traversal)); |
| traversal.addStart(traversal.getTraverserGenerator().generate(computerResult, EmptyStep.instance(), 1l)); |
| return traversal; |
| } catch (final Exception e) { |
| throw new RemoteException(e); |
| } |
| } |
| |
| @Override |
| public boolean allowRemoteConsole() { |
| return true; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| this.hadoopGraph.close(); |
| } |
| |
| /** |
| * Retrieve a script as defined in the shell context. This allows for multi-line scripts to be submitted. |
| */ |
| public static String getScript(final String submittedScript, final GremlinShellEnvironment shell) { |
| return submittedScript.startsWith("@") ? shell.getVariable(submittedScript.substring(1)).toString() : submittedScript; |
| } |
| } |