org.apache.tinkerpop.gremlin.process.computer.VertexProgram.getMapReducers java code examples

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}

this.mapReduces.addAll(this.vertexProgram.getMapReducers());

this.mapReduces.addAll(this.vertexProgram.getMapReducers());

protected void validateStatePriorToExecution() {
  // a graph computer can only be executed one time
  if (this.executed)
    throw Exceptions.computerHasAlreadyBeenSubmittedAVertexProgram();
  else
    this.executed = true;
  // it is not possible execute a computer if it has no vertex program nor mapreducers
  if (null == this.vertexProgram && this.mapReducers.isEmpty())
    throw GraphComputer.Exceptions.computerHasNoVertexProgramNorMapReducers();
  // it is possible to run mapreducers without a vertex program
  if (null != this.vertexProgram) {
    GraphComputerHelper.validateProgramOnComputer(this, vertexProgram);
    this.mapReducers.addAll(this.vertexProgram.getMapReducers());
  }
  // if the user didn't set desired persistence/resultgraph, then get from vertex program or else, no persistence
  this.persist = GraphComputerHelper.getPersistState(Optional.ofNullable(this.vertexProgram), Optional.ofNullable(this.persist));
  this.resultGraph = GraphComputerHelper.getResultGraphState(Optional.ofNullable(this.vertexProgram), Optional.ofNullable(this.resultGraph));
  // determine persistence and result graph options
  if (!this.features().supportsResultGraphPersistCombination(this.resultGraph, this.persist))
    throw GraphComputer.Exceptions.resultGraphPersistCombinationNotSupported(this.resultGraph, this.persist);
  // if too many workers are requested, throw appropriate exception
  if (this.workers > this.features().getMaxWorkers())
    throw GraphComputer.Exceptions.computerRequiresMoreWorkersThanSupported(this.workers, this.features().getMaxWorkers());
}

this.mapReducers.addAll(this.vertexProgram.getMapReducers());

protected void validateStatePriorToExecution() {
  // a graph computer can only be executed one time
  if (this.executed)
    throw Exceptions.computerHasAlreadyBeenSubmittedAVertexProgram();
  else
    this.executed = true;
  // it is not possible execute a computer if it has no vertex program nor mapreducers
  if (null == this.vertexProgram && this.mapReducers.isEmpty())
    throw GraphComputer.Exceptions.computerHasNoVertexProgramNorMapReducers();
  // it is possible to run mapreducers without a vertex program
  if (null != this.vertexProgram) {
    GraphComputerHelper.validateProgramOnComputer(this, vertexProgram);
    this.mapReducers.addAll(this.vertexProgram.getMapReducers());
  }
  // if the user didn't set desired persistence/resultgraph, then get from vertex program or else, no persistence
  this.persist = GraphComputerHelper.getPersistState(Optional.ofNullable(this.vertexProgram), Optional.ofNullable(this.persist));
  this.resultGraph = GraphComputerHelper.getResultGraphState(Optional.ofNullable(this.vertexProgram), Optional.ofNullable(this.resultGraph));
  // determine persistence and result graph options
  if (!this.features().supportsResultGraphPersistCombination(this.resultGraph, this.persist))
    throw GraphComputer.Exceptions.resultGraphPersistCombinationNotSupported(this.resultGraph, this.persist);
  // if too many workers are requested, throw appropriate exception
  if (this.workers > this.features().getMaxWorkers())
    throw GraphComputer.Exceptions.computerRequiresMoreWorkersThanSupported(this.workers, this.features().getMaxWorkers());
}

this.mapReduces.addAll(this.vertexProgram.getMapReducers());

this.mapReducers.addAll(this.vertexProgram.getMapReducers());

this.mapReducers.addAll(this.vertexProgram.getMapReducers());

Javadoc

The set of MapReduce jobs that are associated with the VertexProgram. This is not necessarily the exhaustive list over the life of the GraphComputer. If MapReduce jobs are declared by GraphComputer.mapReduce(), they are not contained in this set. The default is an empty set.

Popular methods of VertexProgram

getMemoryComputeKeys
The Memory keys that will be used during the computation. These are the only keys that can be read o
workerIterationEnd
This method is called at the end of each iteration of each "computational chunk." The set of vertice
workerIterationStart
This method is called at the start of each iteration of each "computational chunk." The set of verti
createVertexProgram
A helper method to construct a VertexProgram given the content of the supplied configuration. The cl
execute
This method denotes the main body of the computation and is executed on each vertex in the graph. Th
getMessageCombiner
Combine the messages in route to a particular vertex. Useful to reduce the amount of data transmitte
getVertexComputeKeys
The org.apache.tinkerpop.gremlin.structure.Element properties that will be mutated during the comput
setup
The method is called at the beginning of the computation. The method is global to the GraphComputer
terminate
The method is called at the end of each iteration to determine if the computation is complete. The m
storeState
When it is necessary to store the state of the VertexProgram, this method is called. This is typical
clone
When multiple workers on a single machine need VertexProgram instances, it is possible to use clone.
getElementComputeKeys

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How to use getMapReducersmethodin org.apache.tinkerpop.gremlin.process.computer.VertexProgram

Best Java code snippets using org.apache.tinkerpop.gremlin.process.computer.VertexProgram.getMapReducers (Showing top 8 results out of 315)

How to use
getMapReducers
method
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org.apache.tinkerpop.gremlin.process.computer.VertexProgram