crunch-scrunch/src/main/scala/org/apache/crunch/scrunch/EmbeddedPipeline.scala

/**
 * 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.crunch.scrunch

import org.apache.hadoop.conf.Configuration

/**
 * Adds a pipeline to the class it is being mixed in to.
 */
trait EmbeddedPipeline {
  /** The pipeline to use. */
  protected def pipeline: Pipeline
}

/**
 * Adds a mapreduce pipeline to the class it is being mixed in to.
 */
trait MREmbeddedPipeline extends EmbeddedPipeline with EmbeddedPipelineLike {
  protected val pipeline: Pipeline = {
    Pipeline.mapReduce(ClassManifest.fromClass(getClass()).erasure, new Configuration())
  }
}

/**
 * Adds an in memory pipeline to the class it is being mixed in to.
 */
trait MemEmbeddedPipeline extends EmbeddedPipeline with EmbeddedPipelineLike {
  protected val pipeline: Pipeline = {
    Pipeline.inMemory
  }
}