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 * 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
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// An example of an initialization script that can be configured to run in Gremlin Server.
// Functions defined here will go into global cache and will not be removed from there
// unless there is a reset of the ScriptEngine.
def addItUp(x, y) { x + y }

// an init script that returns a Map allows explicit setting of global bindings.
def globals = [:]

// defines a sample LifeCycleHook that prints some output to the Gremlin Server console.
// note that the name of the key in the "global" map is unimportant.
globals << [hook : [
  onStartUp: { ctx ->
    ctx.logger.info("Executed once at startup of Gremlin Server.")
  },
  onShutDown: { ctx ->
    ctx.logger.info("Executed once at shutdown of Gremlin Server.")
  }
] as LifeCycleHook]

// Define the default TraversalSource to bind queries to - this one will be named "g" and use
// SparkGraphComputer.  Note that for this script to work, tinkerpop.spark needs to be listed
// as a plugin in the Gremlin Server yaml config file and the plugin must be installed with:
//
// bin/gremlin-server.sh -i org.apache.tinkerpop spark-gremlin x.y.z
//
// Please see conf/gremlin-server-spark.yaml for a working example of a config file that will
// work with this init script.
//
// ReferenceElementStrategy converts all graph elements (vertices/edges/vertex properties)
// to "references" (i.e. just id and label without properties). this strategy was added
// in 3.4.0 to make all Gremlin Server results consistent across all protocols and
// serialization formats aligning it with TinkerPop recommended practices for writing
// Gremlin.
globals << [g : traversal().withEmbedded(graph).withComputer(SparkGraphComputer).withStrategies(ReferenceElementStrategy)]
