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Posted to commits@tinkerpop.apache.org by ok...@apache.org on 2015/09/09 22:20:48 UTC
[18/18] incubator-tinkerpop git commit: Got the Giraph/Spark plugins
working. We have an issue where Jackson needs to be shaded. We also can make
it so Giraph/Spark can be used in the same console session -- just need
GIRAPH_JARS and SPARK_JARS to be dif
Got the Giraph/Spark plugins working. We have an issue where Jackson needs to be shaded. We also can make it so Giraph/Spark can be used in the same console session -- just need GIRAPH_JARS and SPARK_JARS to be different environmental variables. Will merge master/ and work from there --- as well as update asciidocs.
Project: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/commit/90b28a16
Tree: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/tree/90b28a16
Diff: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/diff/90b28a16
Branch: refs/heads/master
Commit: 90b28a16ef6cf0384d4661d17a4e5f756e69666c
Parents: 00963d1
Author: Marko A. Rodriguez <ok...@gmail.com>
Authored: Wed Sep 9 14:19:58 2015 -0600
Committer: Marko A. Rodriguez <ok...@gmail.com>
Committed: Wed Sep 9 14:19:58 2015 -0600
----------------------------------------------------------------------
giraph-gremlin/pom.xml | 42 +---
.../groovy/plugin/GiraphGremlinPlugin.java | 72 ------
.../giraph/process/computer/EmptyOutEdges.java | 80 -------
.../process/computer/GiraphComputeVertex.java | 50 -----
.../process/computer/GiraphGraphComputer.java | 222 -------------------
.../giraph/process/computer/GiraphMemory.java | 218 ------------------
.../process/computer/GiraphMessageCombiner.java | 62 ------
.../process/computer/GiraphMessenger.java | 79 -------
.../process/computer/GiraphWorkerContext.java | 77 -------
.../process/computer/MemoryAggregator.java | 94 --------
.../computer/io/GiraphVertexInputFormat.java | 65 ------
.../computer/io/GiraphVertexOutputFormat.java | 65 ------
.../process/computer/io/GiraphVertexReader.java | 67 ------
.../process/computer/io/GiraphVertexWriter.java | 57 -----
.../groovy/plugin/GiraphGremlinPlugin.java | 72 ++++++
.../giraph/process/computer/EmptyOutEdges.java | 80 +++++++
.../process/computer/GiraphComputeVertex.java | 50 +++++
.../process/computer/GiraphGraphComputer.java | 222 +++++++++++++++++++
.../giraph/process/computer/GiraphMemory.java | 218 ++++++++++++++++++
.../process/computer/GiraphMessageCombiner.java | 62 ++++++
.../process/computer/GiraphMessenger.java | 79 +++++++
.../process/computer/GiraphWorkerContext.java | 77 +++++++
.../process/computer/MemoryAggregator.java | 94 ++++++++
.../computer/io/GiraphVertexInputFormat.java | 65 ++++++
.../computer/io/GiraphVertexOutputFormat.java | 65 ++++++
.../process/computer/io/GiraphVertexReader.java | 67 ++++++
.../process/computer/io/GiraphVertexWriter.java | 57 +++++
...inkerpop.gremlin.groovy.plugin.GremlinPlugin | 1 +
.../computer/HadoopGiraphGraphProvider.java | 1 -
.../gremlin/hadoop/structure/HadoopGraph.java | 30 +--
spark-gremlin/pom.xml | 21 +-
...inkerpop.gremlin.groovy.plugin.GremlinPlugin | 1 +
32 files changed, 1229 insertions(+), 1283 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/pom.xml
----------------------------------------------------------------------
diff --git a/giraph-gremlin/pom.xml b/giraph-gremlin/pom.xml
index 214e9c4..c5e1a8e 100644
--- a/giraph-gremlin/pom.xml
+++ b/giraph-gremlin/pom.xml
@@ -40,32 +40,6 @@ limitations under the License.
<groupId>org.apache.tinkerpop</groupId>
<artifactId>hadoop-gremlin</artifactId>
<version>${project.version}</version>
- <exclusions>
- <exclusion>
- <groupId>org.apache.giraph</groupId>
- <artifactId>giraph-core</artifactId>
- </exclusion>
- <exclusion>
- <groupId>javax.servlet</groupId>
- <artifactId>servlet-api</artifactId>
- </exclusion>
- <exclusion>
- <groupId>javax.servlet</groupId>
- <artifactId>javax.servlet-api</artifactId>
- </exclusion>
- <exclusion>
- <groupId>io.netty</groupId>
- <artifactId>netty-all</artifactId>
- </exclusion>
- <exclusion>
- <groupId>net.java.dev.jets3t</groupId>
- <artifactId>jets3t</artifactId>
- </exclusion>
- <exclusion>
- <groupId>org.scala-lang</groupId>
- <artifactId>scala-library</artifactId>
- </exclusion>
- </exclusions>
</dependency>
<!-- GIRAPH GRAPH COMPUTER -->
<dependency>
@@ -92,11 +66,6 @@ limitations under the License.
<groupId>jline</groupId>
<artifactId>jline</artifactId>
</exclusion>
- <!-- gremlin-test conflicts -->
- <exclusion>
- <groupId>commons-io</groupId>
- <artifactId>commons-io</artifactId>
- </exclusion>
</exclusions>
</dependency>
<!-- consistent dependencies -->
@@ -110,13 +79,13 @@ limitations under the License.
<groupId>org.apache.tinkerpop</groupId>
<artifactId>gremlin-test</artifactId>
<version>${project.version}</version>
- <scope>test</scope>
<exclusions>
<exclusion>
- <groupId>com.google.guava</groupId>
- <artifactId>guava</artifactId>
+ <groupId>commons-io</groupId>
+ <artifactId>commons-io</artifactId>
</exclusion>
</exclusions>
+ <scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.tinkerpop</groupId>
@@ -207,11 +176,6 @@ limitations under the License.
<manifestEntries>
<Gremlin-Plugin-Dependencies>org.apache.hadoop:hadoop-core:1.2.1
</Gremlin-Plugin-Dependencies>
- <!-- deletes the servlet-api jar from the path after install - causes conflicts -->
- <Gremlin-Plugin-Paths>servlet-api-2.5-6.1.14.jar=;servlet-api-2.5-20081211.jar=
- </Gremlin-Plugin-Paths>
- <Gremlin-Lib-Paths>servlet-api-2.5-6.1.14.jar=;servlet-api-2.5-20081211.jar=
- </Gremlin-Lib-Paths>
</manifestEntries>
</archive>
</configuration>
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/groovy/plugin/GiraphGremlinPlugin.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/groovy/plugin/GiraphGremlinPlugin.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/groovy/plugin/GiraphGremlinPlugin.java
deleted file mode 100644
index f50b686..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/groovy/plugin/GiraphGremlinPlugin.java
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * 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.giraph.groovy.plugin;
-
-import org.apache.tinkerpop.giraph.process.computer.GiraphGraphComputer;
-import org.apache.tinkerpop.gremlin.groovy.plugin.AbstractGremlinPlugin;
-import org.apache.tinkerpop.gremlin.groovy.plugin.IllegalEnvironmentException;
-import org.apache.tinkerpop.gremlin.groovy.plugin.PluginAcceptor;
-import org.apache.tinkerpop.gremlin.groovy.plugin.PluginInitializationException;
-import org.apache.tinkerpop.gremlin.groovy.plugin.RemoteAcceptor;
-
-import java.util.HashSet;
-import java.util.Optional;
-import java.util.Set;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphGremlinPlugin extends AbstractGremlinPlugin {
-
- protected static String NAME = "tinkerpop.spark";
-
- protected static final Set<String> IMPORTS = new HashSet<String>() {{
- add(IMPORT_SPACE + GiraphGraphComputer.class.getPackage().getName() + DOT_STAR);
- }};
-
- public GiraphGremlinPlugin() {
- super(true);
- }
-
- @Override
- public String getName() {
- return NAME;
- }
-
- @Override
- public void afterPluginTo(final PluginAcceptor pluginAcceptor) throws PluginInitializationException, IllegalEnvironmentException {
- pluginAcceptor.addImports(IMPORTS);
- try {
- pluginAcceptor.eval(String.format("Logger.getLogger(%s).setLevel(Level.INFO)", GiraphGraphComputer.class.getName()));
- } catch (final Exception e) {
- throw new PluginInitializationException(e.getMessage(), e);
- }
- }
-
- @Override
- public boolean requireRestart() {
- return true;
- }
-
- @Override
- public Optional<RemoteAcceptor> remoteAcceptor() {
- return Optional.empty();
- }
-}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/EmptyOutEdges.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/EmptyOutEdges.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/EmptyOutEdges.java
deleted file mode 100644
index cb649f6..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/EmptyOutEdges.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * 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.giraph.process.computer;
-
-import org.apache.giraph.edge.Edge;
-import org.apache.giraph.edge.OutEdges;
-import org.apache.hadoop.io.NullWritable;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable;
-
-import java.io.DataInput;
-import java.io.DataOutput;
-import java.io.IOException;
-import java.util.Collections;
-import java.util.Iterator;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class EmptyOutEdges implements OutEdges<ObjectWritable, NullWritable> {
-
- private static final EmptyOutEdges INSTANCE = new EmptyOutEdges();
-
- public static EmptyOutEdges instance() {
- return INSTANCE;
- }
-
- @Override
- public void initialize(final Iterable<Edge<ObjectWritable, NullWritable>> edges) {
- }
-
- @Override
- public void initialize(final int capacity) {
- }
-
- @Override
- public void initialize() {
- }
-
- @Override
- public void add(final Edge<ObjectWritable, NullWritable> edge) {
- }
-
- @Override
- public void remove(final ObjectWritable targetVertexId) {
- }
-
- @Override
- public int size() {
- return 0;
- }
-
- @Override
- public Iterator<Edge<ObjectWritable, NullWritable>> iterator() {
- return Collections.emptyIterator();
- }
-
- @Override
- public void write(final DataOutput dataOutput) throws IOException {
- }
-
- @Override
- public void readFields(final DataInput dataInput) throws IOException {
- }
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphComputeVertex.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphComputeVertex.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphComputeVertex.java
deleted file mode 100644
index 7f39c46..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphComputeVertex.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * 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.giraph.process.computer;
-
-import org.apache.giraph.graph.Vertex;
-import org.apache.hadoop.io.NullWritable;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable;
-import org.apache.tinkerpop.gremlin.process.computer.VertexProgram;
-import org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphComputeVertex extends Vertex<ObjectWritable, VertexWritable, NullWritable, ObjectWritable> {
-
- public GiraphComputeVertex() {
- }
-
- public GiraphComputeVertex(final VertexWritable vertexWritable) {
- final VertexWritable newWritable = new VertexWritable();
- newWritable.set(vertexWritable.get());
- this.initialize(new ObjectWritable<>(newWritable.get().id()), newWritable, EmptyOutEdges.instance());
-
- }
-
- @Override
- public void compute(final Iterable<ObjectWritable> messages) {
- final GiraphWorkerContext workerContext = (GiraphWorkerContext) this.getWorkerContext();
- final VertexProgram<?> vertexProgram = workerContext.getVertexProgramPool().take();
- vertexProgram.execute(ComputerGraph.vertexProgram(this.getValue().get(), vertexProgram), workerContext.getMessenger(this, messages.iterator()), workerContext.getMemory());
- workerContext.getVertexProgramPool().offer(vertexProgram);
- }
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphGraphComputer.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphGraphComputer.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphGraphComputer.java
deleted file mode 100644
index acd5628..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphGraphComputer.java
+++ /dev/null
@@ -1,222 +0,0 @@
-/*
- * 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.giraph.process.computer;
-
-import org.apache.commons.configuration.BaseConfiguration;
-import org.apache.commons.configuration.Configuration;
-import org.apache.commons.configuration.FileConfiguration;
-import org.apache.commons.configuration.PropertiesConfiguration;
-import org.apache.giraph.conf.GiraphConfiguration;
-import org.apache.giraph.conf.GiraphConstants;
-import org.apache.giraph.job.GiraphJob;
-import org.apache.hadoop.filecache.DistributedCache;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.mapreduce.InputFormat;
-import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
-import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
-import org.apache.hadoop.util.Tool;
-import org.apache.hadoop.util.ToolRunner;
-import org.apache.tinkerpop.giraph.process.computer.io.GiraphVertexInputFormat;
-import org.apache.tinkerpop.giraph.process.computer.io.GiraphVertexOutputFormat;
-import org.apache.tinkerpop.gremlin.hadoop.Constants;
-import org.apache.tinkerpop.gremlin.hadoop.process.computer.AbstractHadoopGraphComputer;
-import org.apache.tinkerpop.gremlin.hadoop.process.computer.util.MapReduceHelper;
-import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopGraph;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritableIterator;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable;
-import org.apache.tinkerpop.gremlin.hadoop.structure.util.ConfUtil;
-import org.apache.tinkerpop.gremlin.hadoop.structure.util.HadoopHelper;
-import org.apache.tinkerpop.gremlin.process.computer.ComputerResult;
-import org.apache.tinkerpop.gremlin.process.computer.GraphComputer;
-import org.apache.tinkerpop.gremlin.process.computer.MapReduce;
-import org.apache.tinkerpop.gremlin.process.computer.VertexProgram;
-import org.apache.tinkerpop.gremlin.process.computer.util.DefaultComputerResult;
-import org.apache.tinkerpop.gremlin.process.computer.util.MapMemory;
-
-import java.io.File;
-import java.io.NotSerializableException;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.Future;
-import java.util.stream.Stream;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphGraphComputer extends AbstractHadoopGraphComputer implements GraphComputer, Tool {
-
- protected GiraphConfiguration giraphConfiguration = new GiraphConfiguration();
- private MapMemory memory = new MapMemory();
-
- public GiraphGraphComputer(final HadoopGraph hadoopGraph) {
- super(hadoopGraph);
- final Configuration configuration = hadoopGraph.configuration();
- configuration.getKeys().forEachRemaining(key -> this.giraphConfiguration.set(key, configuration.getProperty(key).toString()));
- this.giraphConfiguration.setMasterComputeClass(GiraphMemory.class);
- this.giraphConfiguration.setVertexClass(GiraphComputeVertex.class);
- this.giraphConfiguration.setWorkerContextClass(GiraphWorkerContext.class);
- this.giraphConfiguration.setOutEdgesClass(EmptyOutEdges.class);
- this.giraphConfiguration.setClass(GiraphConstants.VERTEX_ID_CLASS.getKey(), ObjectWritable.class, ObjectWritable.class);
- this.giraphConfiguration.setClass(GiraphConstants.VERTEX_VALUE_CLASS.getKey(), VertexWritable.class, VertexWritable.class);
- this.giraphConfiguration.setBoolean(GiraphConstants.STATIC_GRAPH.getKey(), true);
- this.giraphConfiguration.setVertexInputFormatClass(GiraphVertexInputFormat.class);
- this.giraphConfiguration.setVertexOutputFormatClass(GiraphVertexOutputFormat.class);
- }
-
- @Override
- public GraphComputer program(final VertexProgram vertexProgram) {
- super.program(vertexProgram);
- this.memory.addVertexProgramMemoryComputeKeys(this.vertexProgram);
- final BaseConfiguration apacheConfiguration = new BaseConfiguration();
- vertexProgram.storeState(apacheConfiguration);
- ConfUtil.mergeApacheIntoHadoopConfiguration(apacheConfiguration, this.giraphConfiguration);
- this.vertexProgram.getMessageCombiner().ifPresent(combiner -> this.giraphConfiguration.setCombinerClass(GiraphMessageCombiner.class));
- return this;
- }
-
- @Override
- public Future<ComputerResult> submit() {
- final long startTime = System.currentTimeMillis();
- super.validateStatePriorToExecution();
- return CompletableFuture.<ComputerResult>supplyAsync(() -> {
- try {
- final FileSystem fs = FileSystem.get(this.giraphConfiguration);
- this.loadJars(fs);
- fs.delete(new Path(this.giraphConfiguration.get(Constants.GREMLIN_HADOOP_OUTPUT_LOCATION)), true);
- ToolRunner.run(this, new String[]{});
- } catch (final Exception e) {
- //e.printStackTrace();
- throw new IllegalStateException(e.getMessage(), e);
- }
-
- this.memory.setRuntime(System.currentTimeMillis() - startTime);
- return new DefaultComputerResult(HadoopHelper.getOutputGraph(this.hadoopGraph, this.resultGraph, this.persist), this.memory.asImmutable());
- });
- }
-
- @Override
- public int run(final String[] args) {
- this.giraphConfiguration.setBoolean(Constants.GREMLIN_HADOOP_GRAPH_OUTPUT_FORMAT_HAS_EDGES, this.persist.equals(Persist.EDGES));
- try {
- // it is possible to run graph computer without a vertex program (and thus, only map reduce jobs if they exist)
- if (null != this.vertexProgram) {
- // a way to verify in Giraph whether the traversal will go over the wire or not
- try {
- VertexProgram.createVertexProgram(this.hadoopGraph, ConfUtil.makeApacheConfiguration(this.giraphConfiguration));
- } catch (IllegalStateException e) {
- if (e.getCause() instanceof NumberFormatException)
- throw new NotSerializableException("The provided traversal is not serializable and thus, can not be distributed across the cluster");
- }
- // prepare the giraph vertex-centric computing job
- final GiraphJob job = new GiraphJob(this.giraphConfiguration, Constants.GREMLIN_HADOOP_GIRAPH_JOB_PREFIX + this.vertexProgram);
- // handle input paths (if any)
- if (FileInputFormat.class.isAssignableFrom(this.giraphConfiguration.getClass(Constants.GREMLIN_HADOOP_GRAPH_INPUT_FORMAT, InputFormat.class))) {
- final Path inputPath = new Path(this.giraphConfiguration.get(Constants.GREMLIN_HADOOP_INPUT_LOCATION));
- if (!FileSystem.get(this.giraphConfiguration).exists(inputPath)) // TODO: what about when the input is not a file input?
- throw new IllegalArgumentException("The provided input path does not exist: " + inputPath);
- FileInputFormat.setInputPaths(job.getInternalJob(), inputPath);
- }
- // handle output paths
- final Path outputPath = new Path(this.giraphConfiguration.get(Constants.GREMLIN_HADOOP_OUTPUT_LOCATION) + "/" + Constants.HIDDEN_G);
- FileOutputFormat.setOutputPath(job.getInternalJob(), outputPath);
- job.getInternalJob().setJarByClass(GiraphGraphComputer.class);
- this.logger.info(Constants.GREMLIN_HADOOP_GIRAPH_JOB_PREFIX + this.vertexProgram);
- // execute the job and wait until it completes (if it fails, throw an exception)
- if (!job.run(true))
- throw new IllegalStateException("The GiraphGraphComputer job failed -- aborting all subsequent MapReduce jobs"); // how do I get the exception that occured?
- // add vertex program memory values to the return memory
- for (final String key : this.vertexProgram.getMemoryComputeKeys()) {
- final Path path = new Path(this.giraphConfiguration.get(Constants.GREMLIN_HADOOP_OUTPUT_LOCATION) + "/" + key);
- final ObjectWritableIterator iterator = new ObjectWritableIterator(this.giraphConfiguration, path);
- if (iterator.hasNext()) {
- this.memory.set(key, iterator.next().getValue());
- }
- FileSystem.get(this.giraphConfiguration).delete(path, true);
- }
- final Path path = new Path(this.giraphConfiguration.get(Constants.GREMLIN_HADOOP_OUTPUT_LOCATION) + "/" + Constants.HIDDEN_ITERATION);
- this.memory.setIteration((Integer) new ObjectWritableIterator(this.giraphConfiguration, path).next().getValue());
- FileSystem.get(this.giraphConfiguration).delete(path, true);
- }
- // do map reduce jobs
- this.giraphConfiguration.setBoolean(Constants.GREMLIN_HADOOP_GRAPH_INPUT_FORMAT_HAS_EDGES, this.giraphConfiguration.getBoolean(Constants.GREMLIN_HADOOP_GRAPH_OUTPUT_FORMAT_HAS_EDGES, true));
- for (final MapReduce mapReduce : this.mapReducers) {
- this.memory.addMapReduceMemoryKey(mapReduce);
- MapReduceHelper.executeMapReduceJob(mapReduce, this.memory, this.giraphConfiguration);
- }
-
- // if no persistence, delete the map reduce output
- if (this.persist.equals(Persist.NOTHING)) {
- final Path outputPath = new Path(this.giraphConfiguration.get(Constants.GREMLIN_HADOOP_OUTPUT_LOCATION) + "/" + Constants.HIDDEN_G);
- if (FileSystem.get(this.giraphConfiguration).exists(outputPath)) // TODO: what about when the output is not a file output?
- FileSystem.get(this.giraphConfiguration).delete(outputPath, true);
- }
- } catch (final Exception e) {
- throw new IllegalStateException(e.getMessage(), e);
- }
- return 0;
- }
-
- @Override
- public void setConf(final org.apache.hadoop.conf.Configuration configuration) {
- // TODO: is this necessary to implement?
- }
-
- @Override
- public org.apache.hadoop.conf.Configuration getConf() {
- return this.giraphConfiguration;
- }
-
- private void loadJars(final FileSystem fs) {
- final String hadoopGremlinLibsRemote = "hadoop-gremlin-libs";
- if (this.giraphConfiguration.getBoolean(Constants.GREMLIN_HADOOP_JARS_IN_DISTRIBUTED_CACHE, true)) {
- final String hadoopGremlinLocalLibs = System.getenv(Constants.HADOOP_GREMLIN_LIBS);
- if (null == hadoopGremlinLocalLibs)
- this.logger.warn(Constants.HADOOP_GREMLIN_LIBS + " is not set -- proceeding regardless");
- else {
- final String[] paths = hadoopGremlinLocalLibs.split(":");
- for (final String path : paths) {
- final File file = new File(path);
- if (file.exists()) {
- Stream.of(file.listFiles()).filter(f -> f.getName().endsWith(Constants.DOT_JAR)).forEach(f -> {
- try {
- final Path jarFile = new Path(fs.getHomeDirectory() + "/" + hadoopGremlinLibsRemote + "/" + f.getName());
- fs.copyFromLocalFile(new Path(f.getPath()), jarFile);
- try {
- DistributedCache.addArchiveToClassPath(jarFile, this.giraphConfiguration, fs);
- } catch (final Exception e) {
- throw new RuntimeException(e.getMessage(), e);
- }
- } catch (Exception e) {
- throw new IllegalStateException(e.getMessage(), e);
- }
- });
- } else {
- this.logger.warn(path + " does not reference a valid directory -- proceeding regardless");
- }
- }
- }
- }
- }
-
- public static void main(final String[] args) throws Exception {
- final FileConfiguration configuration = new PropertiesConfiguration(args[0]);
- new GiraphGraphComputer(HadoopGraph.open(configuration)).program(VertexProgram.createVertexProgram(HadoopGraph.open(configuration), configuration)).submit().get();
- }
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMemory.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMemory.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMemory.java
deleted file mode 100644
index 5a56bd3..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMemory.java
+++ /dev/null
@@ -1,218 +0,0 @@
-/*
- * 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.giraph.process.computer;
-
-import org.apache.commons.configuration.Configuration;
-import org.apache.giraph.master.MasterCompute;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.io.SequenceFile;
-import org.apache.tinkerpop.gremlin.hadoop.Constants;
-import org.apache.tinkerpop.gremlin.hadoop.process.computer.util.Rule;
-import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopGraph;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable;
-import org.apache.tinkerpop.gremlin.hadoop.structure.util.ConfUtil;
-import org.apache.tinkerpop.gremlin.process.computer.GraphComputer;
-import org.apache.tinkerpop.gremlin.process.computer.Memory;
-import org.apache.tinkerpop.gremlin.process.computer.VertexProgram;
-import org.apache.tinkerpop.gremlin.process.computer.util.MapMemory;
-import org.apache.tinkerpop.gremlin.process.computer.util.MemoryHelper;
-import org.apache.tinkerpop.gremlin.structure.util.StringFactory;
-
-import java.io.DataInput;
-import java.io.DataOutput;
-import java.util.HashSet;
-import java.util.Set;
-import java.util.stream.Collectors;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphMemory extends MasterCompute implements Memory {
-
- private VertexProgram<?> vertexProgram;
- private GiraphWorkerContext worker;
- private Set<String> memoryKeys;
- private boolean isMasterCompute = true;
- private long startTime = System.currentTimeMillis();
-
- public GiraphMemory() {
- // Giraph ReflectionUtils requires this to be public at minimum
- }
-
- public GiraphMemory(final GiraphWorkerContext worker, final VertexProgram<?> vertexProgram) {
- this.worker = worker;
- this.vertexProgram = vertexProgram;
- this.memoryKeys = new HashSet<>(this.vertexProgram.getMemoryComputeKeys());
- this.isMasterCompute = false;
- }
-
-
- @Override
- public void initialize() {
- // do not initialize aggregators here because the getConf() configuration is not available at this point
- // use compute() initial iteration instead
- }
-
- @Override
- public void compute() {
- this.isMasterCompute = true;
- if (0 == this.getSuperstep()) { // setup
- final Configuration apacheConfiguration = ConfUtil.makeApacheConfiguration(this.getConf());
- this.vertexProgram = VertexProgram.createVertexProgram(HadoopGraph.open(apacheConfiguration), apacheConfiguration);
- this.memoryKeys = new HashSet<>(this.vertexProgram.getMemoryComputeKeys());
- try {
- for (final String key : this.memoryKeys) {
- MemoryHelper.validateKey(key);
- this.registerPersistentAggregator(key, MemoryAggregator.class);
- }
- } catch (final Exception e) {
- throw new IllegalStateException(e.getMessage(), e);
- }
- this.vertexProgram.setup(this);
- } else {
- if (this.vertexProgram.terminate(this)) { // terminate
- // write the memory to HDFS
- final MapMemory memory = new MapMemory(this);
- // a hack to get the last iteration memory values to stick
- this.vertexProgram.terminate(memory);
- final String outputLocation = this.getConf().get(Constants.GREMLIN_HADOOP_OUTPUT_LOCATION, null);
- if (null != outputLocation) {
- try {
- for (final String key : this.keys()) {
- final SequenceFile.Writer writer = SequenceFile.createWriter(FileSystem.get(this.getConf()), this.getConf(), new Path(outputLocation + "/" + key), ObjectWritable.class, ObjectWritable.class);
- writer.append(ObjectWritable.getNullObjectWritable(), new ObjectWritable<>(memory.get(key)));
- writer.close();
- }
- final SequenceFile.Writer writer = SequenceFile.createWriter(FileSystem.get(this.getConf()), this.getConf(), new Path(outputLocation + "/" + Constants.HIDDEN_ITERATION), ObjectWritable.class, ObjectWritable.class);
- writer.append(ObjectWritable.getNullObjectWritable(), new ObjectWritable<>(memory.getIteration()));
- writer.close();
- } catch (final Exception e) {
- throw new IllegalStateException(e.getMessage(), e);
- }
- }
- this.haltComputation();
- }
- }
- }
-
- @Override
- public int getIteration() {
- if (this.isMasterCompute) {
- final int temp = (int) this.getSuperstep();
- return temp == 0 ? temp : temp - 1;
- } else {
- return (int) this.worker.getSuperstep();
- }
- }
-
- @Override
- public long getRuntime() {
- return System.currentTimeMillis() - this.startTime;
- }
-
- @Override
- public Set<String> keys() {
- return this.memoryKeys.stream().filter(this::exists).collect(Collectors.toSet());
- }
-
- @Override
- public boolean exists(final String key) {
- final Rule rule = this.isMasterCompute ? this.getAggregatedValue(key) : this.worker.getAggregatedValue(key);
- return null != rule.getObject();
- }
-
- @Override
- public <R> R get(final String key) throws IllegalArgumentException {
- //this.checkKey(key);
- final Rule rule = this.isMasterCompute ? this.getAggregatedValue(key) : this.worker.getAggregatedValue(key);
- if (null == rule.getObject())
- throw Memory.Exceptions.memoryDoesNotExist(key);
- else
- return rule.getObject();
- }
-
- @Override
- public void set(final String key, Object value) {
- this.checkKeyValue(key, value);
- if (this.isMasterCompute)
- this.setAggregatedValue(key, new Rule(Rule.Operation.SET, value));
- else
- this.worker.aggregate(key, new Rule(Rule.Operation.SET, value));
- }
-
- @Override
- public void and(final String key, final boolean bool) {
- this.checkKeyValue(key, bool);
- if (this.isMasterCompute) { // only called on setup() and terminate()
- Boolean value = this.<Rule>getAggregatedValue(key).<Boolean>getObject();
- value = null == value ? bool : bool && value;
- this.setAggregatedValue(key, new Rule(Rule.Operation.AND, value));
- } else {
- this.worker.aggregate(key, new Rule(Rule.Operation.AND, bool));
- }
- }
-
- @Override
- public void or(final String key, final boolean bool) {
- this.checkKeyValue(key, bool);
- if (this.isMasterCompute) { // only called on setup() and terminate()
- Boolean value = this.<Rule>getAggregatedValue(key).<Boolean>getObject();
- value = null == value ? bool : bool || value;
- this.setAggregatedValue(key, new Rule(Rule.Operation.OR, value));
- } else {
- this.worker.aggregate(key, new Rule(Rule.Operation.OR, bool));
- }
- }
-
- @Override
- public void incr(final String key, final long delta) {
- this.checkKeyValue(key, delta);
- if (this.isMasterCompute) { // only called on setup() and terminate()
- Number value = this.<Rule>getAggregatedValue(key).<Number>getObject();
- value = null == value ? delta : value.longValue() + delta;
- this.setAggregatedValue(key, new Rule(Rule.Operation.INCR, value));
- } else {
- this.worker.aggregate(key, new Rule(Rule.Operation.INCR, delta));
- }
- }
-
- @Override
- public void write(final DataOutput output) {
- // no need to serialize the master compute as it gets its data from aggregators
- // is this true?
- }
-
- @Override
- public void readFields(final DataInput input) {
- // no need to serialize the master compute as it gets its data from aggregators
- // is this true?
- }
-
- @Override
- public String toString() {
- return StringFactory.memoryString(this);
- }
-
- private void checkKeyValue(final String key, final Object value) {
- if (!this.memoryKeys.contains(key))
- throw GraphComputer.Exceptions.providedKeyIsNotAMemoryComputeKey(key);
- MemoryHelper.validateValue(value);
- }
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMessageCombiner.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMessageCombiner.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMessageCombiner.java
deleted file mode 100644
index 8da835d..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMessageCombiner.java
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * 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.giraph.process.computer;
-
-import org.apache.commons.configuration.Configuration;
-import org.apache.giraph.combiner.Combiner;
-import org.apache.giraph.conf.ImmutableClassesGiraphConfigurable;
-import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
-import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopGraph;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable;
-import org.apache.tinkerpop.gremlin.hadoop.structure.util.ConfUtil;
-import org.apache.tinkerpop.gremlin.process.computer.MessageCombiner;
-import org.apache.tinkerpop.gremlin.process.computer.VertexProgram;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphMessageCombiner extends Combiner<ObjectWritable, ObjectWritable> implements ImmutableClassesGiraphConfigurable {
-
- private MessageCombiner messageCombiner;
- private ImmutableClassesGiraphConfiguration configuration;
-
- @Override
- public void combine(final ObjectWritable vertexIndex, final ObjectWritable originalMessage, final ObjectWritable messageToCombine) {
- originalMessage.set(originalMessage.isEmpty() ?
- messageToCombine.get() :
- this.messageCombiner.combine(originalMessage.get(), messageToCombine.get()));
- }
-
- @Override
- public ObjectWritable createInitialMessage() {
- return ObjectWritable.empty();
- }
-
- @Override
- public void setConf(final ImmutableClassesGiraphConfiguration configuration) {
- this.configuration = configuration;
- final Configuration apacheConfiguration = ConfUtil.makeApacheConfiguration(configuration);
- this.messageCombiner = (MessageCombiner) VertexProgram.createVertexProgram(HadoopGraph.open(apacheConfiguration), apacheConfiguration).getMessageCombiner().get();
- }
-
- @Override
- public ImmutableClassesGiraphConfiguration getConf() {
- return this.configuration;
- }
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMessenger.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMessenger.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMessenger.java
deleted file mode 100644
index ca3e100..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphMessenger.java
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * 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.giraph.process.computer;
-
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable;
-import org.apache.tinkerpop.gremlin.process.computer.MessageScope;
-import org.apache.tinkerpop.gremlin.process.computer.Messenger;
-import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.VertexStep;
-import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.StartStep;
-import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalHelper;
-import org.apache.tinkerpop.gremlin.structure.Direction;
-import org.apache.tinkerpop.gremlin.structure.Edge;
-import org.apache.tinkerpop.gremlin.structure.Vertex;
-import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils;
-
-import java.util.Iterator;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphMessenger<M> implements Messenger<M> {
-
- private GiraphComputeVertex giraphComputeVertex;
- private Iterator<ObjectWritable<M>> messages;
-
- public GiraphMessenger(final GiraphComputeVertex giraphComputeVertex, final Iterator<ObjectWritable<M>> messages) {
- this.giraphComputeVertex = giraphComputeVertex;
- this.messages = messages;
- }
-
- @Override
- public Iterator<M> receiveMessages() {
- return IteratorUtils.map(this.messages, ObjectWritable::get);
- }
-
- @Override
- public void sendMessage(final MessageScope messageScope, final M message) {
- if (messageScope instanceof MessageScope.Local) {
- final MessageScope.Local<M> localMessageScope = (MessageScope.Local) messageScope;
- final Traversal.Admin<Vertex, Edge> incidentTraversal = GiraphMessenger.setVertexStart(localMessageScope.getIncidentTraversal().get(), this.giraphComputeVertex.getValue().get());
- final Direction direction = GiraphMessenger.getOppositeDirection(incidentTraversal);
- incidentTraversal.forEachRemaining(edge ->
- this.giraphComputeVertex.sendMessage(
- new ObjectWritable<>(edge.vertices(direction).next().id()),
- new ObjectWritable<>(localMessageScope.getEdgeFunction().apply(message, edge))));
- } else {
- final MessageScope.Global globalMessageScope = (MessageScope.Global) messageScope;
- globalMessageScope.vertices().forEach(vertex ->
- this.giraphComputeVertex.sendMessage(new ObjectWritable<>(vertex.id()), new ObjectWritable<>(message)));
- }
- }
-
- private static <T extends Traversal.Admin<Vertex, Edge>> T setVertexStart(final Traversal<Vertex, Edge> incidentTraversal, final Vertex vertex) {
- incidentTraversal.asAdmin().addStep(0, new StartStep<>(incidentTraversal.asAdmin(), vertex));
- return (T) incidentTraversal;
- }
-
- private static Direction getOppositeDirection(final Traversal.Admin<Vertex, Edge> incidentTraversal) {
- final VertexStep step = TraversalHelper.getLastStepOfAssignableClass(VertexStep.class, incidentTraversal).get();
- return step.getDirection().opposite();
- }
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphWorkerContext.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphWorkerContext.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphWorkerContext.java
deleted file mode 100644
index 6ff7dc0..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/GiraphWorkerContext.java
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * 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.giraph.process.computer;
-
-import org.apache.commons.configuration.Configuration;
-import org.apache.giraph.conf.GiraphConstants;
-import org.apache.giraph.worker.WorkerContext;
-import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopGraph;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.HadoopPools;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable;
-import org.apache.tinkerpop.gremlin.hadoop.structure.util.ConfUtil;
-import org.apache.tinkerpop.gremlin.process.computer.VertexProgram;
-import org.apache.tinkerpop.gremlin.process.computer.util.ImmutableMemory;
-import org.apache.tinkerpop.gremlin.process.computer.util.VertexProgramPool;
-
-import java.util.Iterator;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphWorkerContext extends WorkerContext {
-
- private VertexProgramPool vertexProgramPool;
- private GiraphMemory memory;
-
- public GiraphWorkerContext() {
- // Giraph ReflectionUtils requires this to be public at minimum
- }
-
- public void preApplication() throws InstantiationException, IllegalAccessException {
- final Configuration apacheConfiguration = ConfUtil.makeApacheConfiguration(this.getContext().getConfiguration());
- HadoopPools.initialize(apacheConfiguration);
- final VertexProgram vertexProgram = VertexProgram.createVertexProgram(HadoopGraph.open(apacheConfiguration), apacheConfiguration);
- this.vertexProgramPool = new VertexProgramPool(vertexProgram, this.getContext().getConfiguration().getInt(GiraphConstants.NUM_COMPUTE_THREADS.getKey(), 1));
- this.memory = new GiraphMemory(this, vertexProgram);
- }
-
- public void postApplication() {
-
- }
-
- public void preSuperstep() {
- this.vertexProgramPool.workerIterationStart(new ImmutableMemory(this.memory));
- }
-
- public void postSuperstep() {
- this.vertexProgramPool.workerIterationEnd(new ImmutableMemory(this.memory));
- }
-
- public VertexProgramPool getVertexProgramPool() {
- return this.vertexProgramPool;
- }
-
- public GiraphMemory getMemory() {
- return this.memory;
- }
-
- public GiraphMessenger getMessenger(final GiraphComputeVertex giraphComputeVertex, final Iterator<ObjectWritable> messages) {
- return new GiraphMessenger(giraphComputeVertex, messages);
- }
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/MemoryAggregator.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/MemoryAggregator.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/MemoryAggregator.java
deleted file mode 100644
index 6526fab..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/MemoryAggregator.java
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * 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.giraph.process.computer;
-
-import org.apache.giraph.aggregators.Aggregator;
-import org.apache.tinkerpop.gremlin.hadoop.process.computer.util.Rule;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class MemoryAggregator implements Aggregator<Rule> {
-
- private Object currentObject;
- private Rule.Operation lastOperation = null;
-
- public MemoryAggregator() {
- this.currentObject = null;
- }
-
- @Override
- public Rule getAggregatedValue() {
- if (null == this.currentObject)
- return createInitialValue();
- else if (this.currentObject instanceof Long)
- return new Rule(Rule.Operation.INCR, this.currentObject);
- else
- return new Rule(null == this.lastOperation ? Rule.Operation.NO_OP : this.lastOperation, this.currentObject);
- }
-
- @Override
- public void setAggregatedValue(final Rule rule) {
- this.currentObject = rule.getObject();
- }
-
- @Override
- public void reset() {
- this.currentObject = null;
- }
-
- @Override
- public Rule createInitialValue() {
- return new Rule(Rule.Operation.NO_OP, null);
- }
-
- @Override
- public void aggregate(final Rule ruleWritable) {
- final Rule.Operation rule = ruleWritable.getOperation();
- final Object object = ruleWritable.getObject();
- if (rule != Rule.Operation.NO_OP)
- this.lastOperation = rule;
-
- if (null == this.currentObject || rule.equals(Rule.Operation.SET)) {
- this.currentObject = object;
- } else {
- if (rule.equals(Rule.Operation.INCR)) {
- this.currentObject = (Long) this.currentObject + (Long) object;
- } else if (rule.equals(Rule.Operation.AND)) {
- this.currentObject = (Boolean) this.currentObject && (Boolean) object;
- } else if (rule.equals(Rule.Operation.OR)) {
- this.currentObject = (Boolean) this.currentObject || (Boolean) object;
- } else if (rule.equals(Rule.Operation.NO_OP)) {
- if (object instanceof Boolean) { // only happens when NO_OP booleans are being propagated will this occur
- if (null == this.lastOperation) {
- // do nothing ... why?
- } else if (this.lastOperation.equals(Rule.Operation.AND)) {
- this.currentObject = (Boolean) this.currentObject && (Boolean) object;
- } else if (this.lastOperation.equals(Rule.Operation.OR)) {
- this.currentObject = (Boolean) this.currentObject || (Boolean) object;
- } else {
- throw new IllegalStateException("This state should not have occurred: " + ruleWritable);
- }
- }
- } else {
- throw new IllegalArgumentException("The provided rule is unknown: " + ruleWritable);
- }
- }
- }
-}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexInputFormat.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexInputFormat.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexInputFormat.java
deleted file mode 100644
index 2b3b723..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexInputFormat.java
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * 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.giraph.process.computer.io;
-
-import org.apache.tinkerpop.gremlin.hadoop.Constants;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable;
-import org.apache.giraph.io.VertexInputFormat;
-import org.apache.giraph.io.VertexReader;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.io.NullWritable;
-import org.apache.hadoop.mapreduce.InputFormat;
-import org.apache.hadoop.mapreduce.InputSplit;
-import org.apache.hadoop.mapreduce.JobContext;
-import org.apache.hadoop.mapreduce.TaskAttemptContext;
-import org.apache.hadoop.util.ReflectionUtils;
-
-import java.io.IOException;
-import java.util.List;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphVertexInputFormat extends VertexInputFormat {
-
- private InputFormat<NullWritable, VertexWritable> hadoopGraphInputFormat;
-
- @Override
- public List<InputSplit> getSplits(final JobContext context, final int minSplitCountHint) throws IOException, InterruptedException {
- this.constructor(context.getConfiguration());
- return this.hadoopGraphInputFormat.getSplits(context);
- }
-
- @Override
- public VertexReader createVertexReader(final InputSplit split, final TaskAttemptContext context) throws IOException {
- this.constructor(context.getConfiguration());
- try {
- return new GiraphVertexReader(this.hadoopGraphInputFormat.createRecordReader(split, context));
- } catch (InterruptedException e) {
- throw new IOException(e);
- }
- }
-
- private final void constructor(final Configuration configuration) {
- if (null == this.hadoopGraphInputFormat) {
- this.hadoopGraphInputFormat = ReflectionUtils.newInstance(configuration.getClass(Constants.GREMLIN_HADOOP_GRAPH_INPUT_FORMAT, InputFormat.class, InputFormat.class), configuration);
- }
- }
-
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexOutputFormat.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexOutputFormat.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexOutputFormat.java
deleted file mode 100644
index 0135bd5..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexOutputFormat.java
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * 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.giraph.process.computer.io;
-
-import org.apache.tinkerpop.gremlin.hadoop.Constants;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable;
-import org.apache.giraph.io.VertexOutputFormat;
-import org.apache.giraph.io.VertexWriter;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.io.NullWritable;
-import org.apache.hadoop.mapreduce.JobContext;
-import org.apache.hadoop.mapreduce.OutputCommitter;
-import org.apache.hadoop.mapreduce.OutputFormat;
-import org.apache.hadoop.mapreduce.TaskAttemptContext;
-import org.apache.hadoop.util.ReflectionUtils;
-
-import java.io.IOException;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphVertexOutputFormat extends VertexOutputFormat {
-
- private OutputFormat<NullWritable, VertexWritable> hadoopGraphOutputFormat;
-
- @Override
- public VertexWriter createVertexWriter(final TaskAttemptContext context) throws IOException, InterruptedException {
- this.constructor(context.getConfiguration());
- return new GiraphVertexWriter(this.hadoopGraphOutputFormat);
- }
-
- @Override
- public void checkOutputSpecs(final JobContext context) throws IOException, InterruptedException {
- this.constructor(context.getConfiguration());
- this.hadoopGraphOutputFormat.checkOutputSpecs(context);
- }
-
- @Override
- public OutputCommitter getOutputCommitter(final TaskAttemptContext context) throws IOException, InterruptedException {
- this.constructor(context.getConfiguration());
- return this.hadoopGraphOutputFormat.getOutputCommitter(context);
- }
-
- private final void constructor(final Configuration configuration) {
- if (null == this.hadoopGraphOutputFormat) {
- this.hadoopGraphOutputFormat = ReflectionUtils.newInstance(configuration.getClass(Constants.GREMLIN_HADOOP_GRAPH_OUTPUT_FORMAT, OutputFormat.class, OutputFormat.class), configuration);
- }
- }
-}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexReader.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexReader.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexReader.java
deleted file mode 100644
index 7c8273c..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexReader.java
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * 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.giraph.process.computer.io;
-
-import org.apache.giraph.graph.Vertex;
-import org.apache.giraph.io.VertexReader;
-import org.apache.hadoop.io.NullWritable;
-import org.apache.hadoop.mapreduce.InputSplit;
-import org.apache.hadoop.mapreduce.RecordReader;
-import org.apache.hadoop.mapreduce.TaskAttemptContext;
-import org.apache.tinkerpop.giraph.process.computer.GiraphComputeVertex;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable;
-
-import java.io.IOException;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphVertexReader extends VertexReader {
-
- private RecordReader<NullWritable, VertexWritable> recordReader;
-
- public GiraphVertexReader(final RecordReader<NullWritable, VertexWritable> recordReader) {
- this.recordReader = recordReader;
- }
-
- @Override
- public void initialize(final InputSplit inputSplit, final TaskAttemptContext context) throws IOException, InterruptedException {
- this.recordReader.initialize(inputSplit, context);
- }
-
- @Override
- public boolean nextVertex() throws IOException, InterruptedException {
- return this.recordReader.nextKeyValue();
- }
-
- @Override
- public Vertex getCurrentVertex() throws IOException, InterruptedException {
- return new GiraphComputeVertex(this.recordReader.getCurrentValue());
- }
-
- @Override
- public void close() throws IOException {
- this.recordReader.close();
- }
-
- @Override
- public float getProgress() throws IOException, InterruptedException {
- return this.recordReader.getProgress();
- }
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexWriter.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexWriter.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexWriter.java
deleted file mode 100644
index 812386d..0000000
--- a/giraph-gremlin/src/main/java/org/apache/tinkerpop/giraph/process/computer/io/GiraphVertexWriter.java
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * 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.giraph.process.computer.io;
-
-import org.apache.giraph.graph.Vertex;
-import org.apache.giraph.io.VertexWriter;
-import org.apache.hadoop.io.NullWritable;
-import org.apache.hadoop.mapreduce.OutputFormat;
-import org.apache.hadoop.mapreduce.RecordWriter;
-import org.apache.hadoop.mapreduce.TaskAttemptContext;
-import org.apache.tinkerpop.giraph.process.computer.GiraphComputeVertex;
-import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable;
-
-import java.io.IOException;
-
-/**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
- */
-public final class GiraphVertexWriter extends VertexWriter {
- private final OutputFormat<NullWritable, VertexWritable> outputFormat;
- private RecordWriter<NullWritable, VertexWritable> recordWriter;
-
- public GiraphVertexWriter(final OutputFormat<NullWritable, VertexWritable> outputFormat) {
- this.outputFormat = outputFormat;
- }
-
- @Override
- public void initialize(final TaskAttemptContext context) throws IOException, InterruptedException {
- this.recordWriter = this.outputFormat.getRecordWriter(context);
- }
-
- @Override
- public void close(final TaskAttemptContext context) throws IOException, InterruptedException {
- this.recordWriter.close(context);
- }
-
- @Override
- public void writeVertex(final Vertex vertex) throws IOException, InterruptedException {
- this.recordWriter.write(NullWritable.get(), ((GiraphComputeVertex) vertex).getValue());
- }
-}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/groovy/plugin/GiraphGremlinPlugin.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/groovy/plugin/GiraphGremlinPlugin.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/groovy/plugin/GiraphGremlinPlugin.java
new file mode 100644
index 0000000..8518871
--- /dev/null
+++ b/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/groovy/plugin/GiraphGremlinPlugin.java
@@ -0,0 +1,72 @@
+/*
+ * 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.giraph.groovy.plugin;
+
+import org.apache.tinkerpop.gremlin.giraph.process.computer.GiraphGraphComputer;
+import org.apache.tinkerpop.gremlin.groovy.plugin.AbstractGremlinPlugin;
+import org.apache.tinkerpop.gremlin.groovy.plugin.IllegalEnvironmentException;
+import org.apache.tinkerpop.gremlin.groovy.plugin.PluginAcceptor;
+import org.apache.tinkerpop.gremlin.groovy.plugin.PluginInitializationException;
+import org.apache.tinkerpop.gremlin.groovy.plugin.RemoteAcceptor;
+
+import java.util.HashSet;
+import java.util.Optional;
+import java.util.Set;
+
+/**
+ * @author Marko A. Rodriguez (http://markorodriguez.com)
+ */
+public final class GiraphGremlinPlugin extends AbstractGremlinPlugin {
+
+ protected static String NAME = "tinkerpop.giraph";
+
+ protected static final Set<String> IMPORTS = new HashSet<String>() {{
+ add(IMPORT_SPACE + GiraphGraphComputer.class.getPackage().getName() + DOT_STAR);
+ }};
+
+ public GiraphGremlinPlugin() {
+ super(true);
+ }
+
+ @Override
+ public String getName() {
+ return NAME;
+ }
+
+ @Override
+ public void afterPluginTo(final PluginAcceptor pluginAcceptor) throws PluginInitializationException, IllegalEnvironmentException {
+ pluginAcceptor.addImports(IMPORTS);
+ /*try {
+ pluginAcceptor.eval(String.format("LoggerFactory.getLogger(%s).setLevel(Level.INFO)", GiraphGraphComputer.class.getName()));
+ } catch (final Exception e) {
+ throw new PluginInitializationException(e.getMessage(), e);
+ }*/
+ }
+
+ @Override
+ public boolean requireRestart() {
+ return true;
+ }
+
+ @Override
+ public Optional<RemoteAcceptor> remoteAcceptor() {
+ return Optional.empty();
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/process/computer/EmptyOutEdges.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/process/computer/EmptyOutEdges.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/process/computer/EmptyOutEdges.java
new file mode 100644
index 0000000..4df4835
--- /dev/null
+++ b/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/process/computer/EmptyOutEdges.java
@@ -0,0 +1,80 @@
+/*
+ * 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.giraph.process.computer;
+
+import org.apache.giraph.edge.Edge;
+import org.apache.giraph.edge.OutEdges;
+import org.apache.hadoop.io.NullWritable;
+import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+import java.util.Collections;
+import java.util.Iterator;
+
+/**
+ * @author Marko A. Rodriguez (http://markorodriguez.com)
+ */
+public final class EmptyOutEdges implements OutEdges<ObjectWritable, NullWritable> {
+
+ private static final EmptyOutEdges INSTANCE = new EmptyOutEdges();
+
+ public static EmptyOutEdges instance() {
+ return INSTANCE;
+ }
+
+ @Override
+ public void initialize(final Iterable<Edge<ObjectWritable, NullWritable>> edges) {
+ }
+
+ @Override
+ public void initialize(final int capacity) {
+ }
+
+ @Override
+ public void initialize() {
+ }
+
+ @Override
+ public void add(final Edge<ObjectWritable, NullWritable> edge) {
+ }
+
+ @Override
+ public void remove(final ObjectWritable targetVertexId) {
+ }
+
+ @Override
+ public int size() {
+ return 0;
+ }
+
+ @Override
+ public Iterator<Edge<ObjectWritable, NullWritable>> iterator() {
+ return Collections.emptyIterator();
+ }
+
+ @Override
+ public void write(final DataOutput dataOutput) throws IOException {
+ }
+
+ @Override
+ public void readFields(final DataInput dataInput) throws IOException {
+ }
+}
http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/90b28a16/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/process/computer/GiraphComputeVertex.java
----------------------------------------------------------------------
diff --git a/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/process/computer/GiraphComputeVertex.java b/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/process/computer/GiraphComputeVertex.java
new file mode 100644
index 0000000..b8de43a
--- /dev/null
+++ b/giraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/giraph/process/computer/GiraphComputeVertex.java
@@ -0,0 +1,50 @@
+/*
+ * 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.giraph.process.computer;
+
+import org.apache.giraph.graph.Vertex;
+import org.apache.hadoop.io.NullWritable;
+import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable;
+import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable;
+import org.apache.tinkerpop.gremlin.process.computer.VertexProgram;
+import org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph;
+
+/**
+ * @author Marko A. Rodriguez (http://markorodriguez.com)
+ */
+public final class GiraphComputeVertex extends Vertex<ObjectWritable, VertexWritable, NullWritable, ObjectWritable> {
+
+ public GiraphComputeVertex() {
+ }
+
+ public GiraphComputeVertex(final VertexWritable vertexWritable) {
+ final VertexWritable newWritable = new VertexWritable();
+ newWritable.set(vertexWritable.get());
+ this.initialize(new ObjectWritable<>(newWritable.get().id()), newWritable, EmptyOutEdges.instance());
+
+ }
+
+ @Override
+ public void compute(final Iterable<ObjectWritable> messages) {
+ final GiraphWorkerContext workerContext = (GiraphWorkerContext) this.getWorkerContext();
+ final VertexProgram<?> vertexProgram = workerContext.getVertexProgramPool().take();
+ vertexProgram.execute(ComputerGraph.vertexProgram(this.getValue().get(), vertexProgram), workerContext.getMessenger(this, messages.iterator()), workerContext.getMemory());
+ workerContext.getVertexProgramPool().offer(vertexProgram);
+ }
+}