Bulbs 0.3 gremlin.yaml

gremlin.yaml

# 
# Copyright 2011 James Thornton (http://jamesthornton.com)
# BSD License (see LICENSE for details)
#
# Gremlin scripts in Gremlin-Groovy v1.3
#
# Each script is a string literal of a Python string template.
#
# See the Gremlin and Blueprints docs for the full Gremlin/Blueprints API. 
#
# Gremlin Wiki:     https://github.com/tinkerpop/gremlin/wiki
# Gremlin Steps:    https://github.com/tinkerpop/gremlin/wiki/Gremlin-Steps
# Gremlin Methods:  https://github.com/tinkerpop/gremlin/wiki/Gremlin-Methods 
# Blueprints Wiki:  https://github.com/tinkerpop/blueprints/wiki
#
# Performance: The YAML file is only sourced once so no per-request overhead, 
#              and timeit showed 21ms to build a script from named params vs 
#              8ms for traditional string substitutions, such as
#              g.v(%s).outE(%s) % (_id, label) 
#


get_vertices: | 
  g.getVertices()

get_edges: |
  g.getEdges()

outE: |
  g.v($_id).outE($label)

inE: |
  g.v($_id).inE($label)

bothE: | 
  g.v($_id).bothE($label)

outV: |
  g.v($_id).outV($label)

inV: |
  g.v($_id).inV($label)

bothV: | 
  g.v($_id).bothV($label)

save_graphml: |
  g.saveGraphML('data/graphml')
  new File('data/graphml').getText()

load_graphml: |
  g.loadGraphML($uri)
  
rebuild_vertex_index: |
  index = g.getIndex('$index_name',Vertex)
  AutomaticIndexHelper.reIndexElements(g, index, g.getVertices())

rebuild_edge_index: |
  index = g.getIndex('$index_name',Edge)
  AutomaticIndexHelper.reIndexElements(g, index, g.getEdges())


#
# Gremlin user-defined defined tree steps, inTree() and outTree().
#
# You must execute this at least once before you use the tree steps.
# For production use, this should really be defined server side.
#
# See https://groups.google.com/d/topic/gremlin-users/iCPUifiU_wk/discussion
#
# Note: $$ is a Python template escape sequence, replaced with a single "$".
#
define_tree_steps: |
  tree = { vertices ->

    def results = []

    vertices.each() {
      results << it
      children = it."$$direction"().toList()
      if (children) {
        child_tree = tree(children)
        results << child_tree
      }
    }
    results
  }

  inClosure = {final Object... params -> 
    try { label = params[0] }
    catch(e){ label = null }
    results = []
    direction = "in"
    _().transform{ tree(it) }
  }    

  outClosure = {final Object... params -> 
    try { label = params[0] }
    catch(e){ label = null }
    results = []
    direction = "out"
    _().transform{ tree(it) }
  }   

  Gremlin.defineStep("inTree", [Vertex,Pipe], inClosure) 
  Gremlin.defineStep("outTree", [Vertex,Pipe], outClosure)