org.apache.giraph.graph.Vertex类的使用及代码示例

x33g5p2x  于2022-02-01 转载在 其他  
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本文整理了Java中org.apache.giraph.graph.Vertex类的一些代码示例，展示了Vertex类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Vertex类的具体详情如下：
包路径：org.apache.giraph.graph.Vertex
类名称：Vertex

Vertex介绍

[英]Class which holds vertex id, data and edges.
[中]类，该类保存顶点id、数据和边。

代码示例

代码示例来源：origin: org.apache.giraph/giraph-core

/**
 * Add vertex
 *
 * @param vertex Vertex
 * @return this
 */
public TestGraph<I, V, E> addVertex(Vertex<I, V, E> vertex) {
 Vertex<I, V, E> previousVertex = vertices.get(vertex.getId());
 if (previousVertex != null) {
  vertexValueCombiner.combine(previousVertex.getValue(), vertex.getValue());
  for (Edge<I, E> edge : vertex.getEdges()) {
   previousVertex.addEdge(edge);
  }
 } else {
  vertices.put(vertex.getId(), vertex);
 }
 return this;
}

代码示例来源：origin: org.apache.giraph/giraph-core

/**
 * The backing store of the current vertex id is now released.
 * Further calls to getCurrentVertexId () without calling next()
 * will return null.
 *
 * @return Current vertex id that was released
 */
public I releaseCurrentVertexId() {
 I releasedVertexId = vertex.getId();
 vertex.initialize(null, vertex.getValue());
 return releasedVertexId;
}

代码示例来源：origin: org.apache.giraph/giraph-examples

@Override
 public void compute(
   Vertex<LongWritable, LongWritable, DoubleWritable> vertex,
   Iterable<DoubleWritable> messages) throws IOException {
  LongWritable vertexValue = vertex.getValue();
  vertexValue.set(vertex.getNumEdges());
  vertex.setValue(vertexValue);
  vertex.voteToHalt();
 }
}

代码示例来源：origin: grafos-ml/okapi

@Override
 public void compute(Vertex<WritableComparable, Writable, Writable> vertex, 
   Iterable<WritableComparable> messages) throws IOException {
  int count = 0;
  for (WritableComparable msg : messages) {
   // If this vertex has a neighbor with this ID, then this means it
   // participates in a triangle.
   if (vertex.getEdgeValue(msg)!=null) {
    count++;
   }
  }
  if (count>0) {
   vertex.setValue(new IntWritable(count));
  }
  vertex.voteToHalt();
 }
}

代码示例来源：origin: grafos-ml/okapi

@Override
public void compute(Vertex<CfLongId, FloatMatrixWritable, FloatWritable> vertex, Iterable<FloatMatrixMessage> messages) throws IOException {
  vertex.setValue(new FloatMatrixWritable(FloatMatrix.rand(DIM)));
  if(getSuperstep() == 0){
    Iterable<Edge<CfLongId, FloatWritable>> edges = vertex.getEdges();
    sendMessage(vertex.getId(), emptyMsg); //send message to myself in order to be executed in the next super step
    for (Edge<CfLongId, FloatWritable> edge : edges) {
      sendMessage(edge.getTargetVertexId(), new FloatMatrixMessage(vertex.getId(), emptyList, edge.getValue().get()));
    }
  }
  vertex.voteToHalt();
}

代码示例来源：origin: grafos-ml/okapi

@Override
 public void compute(Vertex<LongWritable, Writable, DoubleWritable> vertex, 
   Iterable<LongWritable> messages) throws IOException {
  for (LongWritable msg : messages) {
   assert(msg.compareTo(vertex.getId())<0); // This can never happen
   double weight = vertex.getEdgeValue(msg).get();
   // This means there is an edge:
   // 1) FROM vertex with ID=msg.get()
   // 2) TO vertex with ID=vertex.getId().get()
   // 3) with the specified weight.
   SimpleEdge t = new SimpleEdge(msg.get(), vertex.getId().get(), weight);
   for (Edge<LongWritable, DoubleWritable> edge: vertex.getEdges()) {
    if (vertex.getId().compareTo(edge.getTargetVertexId()) < 0) {
     sendMessage(edge.getTargetVertexId(), t);
    }
   } 
  }
  vertex.voteToHalt();
 }
}

代码示例来源：origin: grafos-ml/okapi

@Override
  protected Text convertVertexToLine(
      Vertex<CfLongId, FloatMatrixWritable, BooleanWritable> vertex)
      throws IOException {
    if (outputEdge.equals(vertex.getId())){
      return new Text(vertex.getValue().toString());
    }
    return null;
  }
};

代码示例来源：origin: apache/giraph

for (Vertex<I, V, E> vertex : partition) {
 Iterable messages =
   internalApi.takeMessages(vertex.getId());
 if (vertex.isHalted() && !Iterables.isEmpty(messages)) {
  vertex.wakeUp();
 if (!vertex.isHalted()) {
  localLogic.compute(vertex, messages);
  vertex.unwrapMutableEdges();
 if (!vertex.isHalted()) {
  anyCurVertexAlive = true;

代码示例来源：origin: grafos-ml/okapi

protected void initFactorsIfNeeded(Vertex<CfLongId, FloatMatrixWritable, FloatWritable> vertex) {
  if (null == vertex.getValue() || vertex.getValue().columns != d){
    vertex.setValue(new FloatMatrixWritable(FloatMatrix.rand(d)));
  }
}

代码示例来源：origin: org.apache.giraph/giraph-core

/**
 * Writes Vertex data to output stream.
 *
 * @param output the output stream
 * @param vertex The vertex to serialize
 * @param conf Configuration
 * @param <I> Vertex id
 * @param <V> Vertex value
 * @param <E> Edge value
 * @throws IOException
 */
@SuppressWarnings("unchecked")
public static <I extends WritableComparable, V extends Writable,
E extends Writable> void writeVertexToDataOutput(
  DataOutput output,
  Vertex<I, V, E> vertex,
  ImmutableClassesGiraphConfiguration<I, V, E> conf)
 throws IOException {
 vertex.getId().write(output);
 vertex.getValue().write(output);
 ((OutEdges<I, E>) vertex.getEdges()).write(output);
 output.writeBoolean(vertex.isHalted());
}

代码示例来源：origin: grafos-ml/okapi

@Override
public void compute(
    Vertex<LongWritable, VertexValue, EdgeValue> vertex,
    Iterable<PartitionMessage> messages) throws IOException {
  short partition = vertex.getValue().getCurrentPartition();
  if (partition == -1) {
    partition = (short) rnd.nextInt(numberOfPartitions);
  }
  aggregate(loadAggregatorNames[partition],
      new LongWritable(vertex.getNumEdges()));
  vertex.getValue().setCurrentPartition(partition);
  vertex.getValue().setNewPartition(partition);
  PartitionMessage message = new PartitionMessage(vertex.getId()
      .get(), partition);
  sendMessageToAllEdges(vertex, message);
}

代码示例来源：origin: grafos-ml/okapi

@Override
 public void compute(Vertex<WritableComparable, Writable, Writable> vertex, 
   Iterable<Writable> messages) throws IOException {
  for (Edge<WritableComparable, Writable> edge: vertex.getEdges()) {
   if (edge.getTargetVertexId().compareTo(vertex.getId()) > 0) {
    sendMessage(edge.getTargetVertexId(), vertex.getId());
   }
  }
  vertex.voteToHalt();
 }
}

代码示例来源：origin: grafos-ml/okapi

/**
 * We override this function as we need a special treatment for item biases. See the class documentation for the explanation.
 */
protected void initFactorsIfNeeded(Vertex<CfLongId,FloatMatrixWritable,FloatWritable> vertex) {
  if (null == vertex.getValue() || vertex.getValue().columns != d+1){
    vertex.setValue(new FloatMatrixWritable(FloatMatrix.rand(d + 1)));
  }
  if (vertex.getId().isUser()){//In BPR the first factor of the user is always 1, its to have item baselines
    vertex.getValue().put(0, 1f);
  }
}

代码示例来源：origin: grafos-ml/okapi

private void processUpdates(Vertex<LongWritable, IntWritable, MBMEdgeValue> vertex, Iterable<MBMMessage> messages) throws AssertionError {
  Set<LongWritable> toRemove = new HashSet<LongWritable>();
  int numIncluded = 0;
  for (MBMMessage msg : messages) {
    MBMEdgeValue edgeValue = vertex.getEdgeValue(msg.getId());
    if (edgeValue == null) {
      // edge has already been removed, do nothing
      if (LOG.isDebugEnabled())
        LOG.debug(String.format("Superstep %d Vertex %d: message for removed edge from vertex %d", getSuperstep(), vertex.getId().get(), msg
            .getId().get()));
    } else {
      if (msg.getState() == State.PROPOSED && edgeValue.getState() == State.PROPOSED) {
        edgeValue.setState(State.INCLUDED);
        numIncluded++;
      } else if (msg.getState() == State.REMOVED) {
        toRemove.add(msg.getId());
      }
    }
  }
  // update capacity
  vertex.getValue().set(vertex.getValue().get() - numIncluded);
  // remove edges locally
  for (LongWritable e : toRemove)
    vertex.removeEdges(e);
  if (LOG.isDebugEnabled())
    LOG.debug(String.format("Superstep %d Vertex %d: included %d edges, removed %d edges", getSuperstep(), vertex.getId().get(), numIncluded,
        toRemove.size()));
}

代码示例来源：origin: grafos-ml/okapi

@Override
  public Text convertVertexToLine(Vertex<LongWritable, IntWritable, MBMEdgeValue> vertex) throws IOException {
    StringBuffer sb = new StringBuffer(vertex.getId().toString());
    sb.append(delimiter);
    sb.append(vertex.getValue());
    for (Edge<LongWritable, MBMEdgeValue> edge : vertex.getEdges()) {
      sb.append(delimiter).append(edge.getTargetVertexId());
      sb.append(delimiter).append(edge.getValue().getWeight());
      // skip the state, which is always INCLUDED
    }
    return new Text(sb.toString());
  }
}

代码示例来源：origin: org.apache.giraph/giraph-core

@Override
 public void writeVertex(
  Vertex<WritableComparable, Writable, Writable> vertex)
  throws IOException, InterruptedException {
  StringBuilder sb = new StringBuilder(vertex.getNumEdges() * 10);
  for (Edge<WritableComparable, Writable> edge : vertex.getEdges()) {
   addEdge(sb, vertex.getId(), edge);
  }
  addNodeInfo(vertex, sb);
  getRecordWriter().write(new Text(sb.toString()), null);
 }
}

代码示例来源：origin: grafos-ml/okapi

@Override
 public void compute(Vertex<LongWritable, NullWritable, DoubleBooleanPair> vertex,
   Iterable<LongWritable> messages) throws IOException {
   
   // handle set-semimetric-label messages
   for (LongWritable trg: messages) {
     if (vertex.getEdgeValue(trg) != null) {
       vertex.setEdgeValue(trg, vertex.getEdgeValue(trg).setSemimetric(true));
     }
   }
   
   for (Edge<LongWritable, DoubleBooleanPair> edge : vertex.getEdges()) {
     if (edge.getValue().isSemimetric()) {
       // remove edge
       removeEdgesRequest(vertex.getId(), edge.getTargetVertexId());	
     }
   }
 }
}

代码示例来源：origin: org.apache.giraph/giraph-core

/**
 * Writes vertex data (Id, value and halted state) to stream.
 *
 * @param output The output stream
 * @param vertex The vertex to serialize
 * @throws IOException
 */
private void writeVertexData(DataOutput output, Vertex<I, V, E> vertex)
  throws IOException {
 vertex.getId().write(output);
 V value = vertex.getValue();
 if (value != null) {
  output.writeBoolean(false);
  value.write(output);
 } else {
  output.writeBoolean(true);
 }
 output.writeBoolean(vertex.isHalted());
}

代码示例来源：origin: grafos-ml/okapi

@Override
 public void compute(
   Vertex<LongWritable, NullWritable, NullWritable> vertex,
   Iterable<LongWritable> messages) throws IOException {
  
  HashSet<LongWritable> toDelete = new HashSet<LongWritable>();
  for (LongWritable id : messages) {
   toDelete.add(new LongWritable(id.get()));
  }
  Iterator<MutableEdge<LongWritable,NullWritable>> edgeIterator = 
    vertex.getMutableEdges().iterator();
  
  while (edgeIterator.hasNext()) {
   if (toDelete.contains(edgeIterator.next().getTargetVertexId())) {
    edgeIterator.remove();
   }
  }
  
  if (vertex.getNumEdges()<getConf().getInt(K_VALUE, K_VALUE_DEFAULT)) {
   sendMessageToAllEdges(vertex, vertex.getId());
   removeVertexRequest(vertex.getId());
  }
  
  vertex.voteToHalt();
 }
}

代码示例来源：origin: org.apache.giraph/giraph-examples

@Override
 public void compute(Vertex<IntWritable, IntWritable, NullWritable> vertex,
   Iterable<IntWritable> messages) throws IOException {
  boolean changed = false;
  for (IntWritable message : messages) {
   if (vertex.getValue().get() < message.get()) {
    vertex.setValue(message);
    changed = true;
   }
  }
  if (getSuperstep() == 0 || changed) {
   sendMessageToAllEdges(vertex, vertex.getValue());
  }
  vertex.voteToHalt();
 }
}

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