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/**
* 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 com.google.common.collect.ImmutableList
import org.apache.crunch.io.{From => from, To => to}
import org.apache.crunch.test.Person
import _root_.org.junit.Test
case class Foo(val bar: Int, val baz: String)
class JoinTest extends CrunchSuite {
lazy val pipeline = Pipeline.mapReduce[JoinTest](tempDir.getDefaultConfiguration)
def wordCount(fileName: String) = {
pipeline.read(from.textFile(fileName))
.flatMap(_.toLowerCase.split("\\W+")).count
}
@Test def join {
val shakespeare = tempDir.copyResourceFileName("shakes.txt")
val dickens = tempDir.copyResourceFileName("dickens.txt")
val output = tempDir.getFile("output")
val filtered = wordCount(shakespeare).join(wordCount(dickens))
.map((k, v) => (k, v._1 - v._2))
.write(to.textFile(output.getAbsolutePath()))
.filter((k, d) => d > 0).materialize
assert(filtered.exists(_ == ("noble", 9)))
pipeline.done
}
@Test def joinMapside {
val shakespeare = tempDir.copyResourceFileName("shakes.txt")
val dickens = tempDir.copyResourceFileName("dickens.txt")
val output = tempDir.getFile("output")
val filtered = wordCount(shakespeare).innerJoinUsing(wordCount(dickens), Joins.mapside())
.map((k, v) => (k, v._1 - v._2))
.write(to.textFile(output.getAbsolutePath()))
.filter((k, d) => d > 0).materialize
assert(filtered.exists(_ == ("noble", 9)))
pipeline.done
}
@Test def joinCaseWithSpecific: Unit = {
val foos = pipeline.create(List(Foo(1, "a"), Foo(2, "b")), Avros.caseClasses[Foo])
val p1 = new Person()
p1.setName("Josh")
p1.setAge(35)
p1.setSiblingnames(ImmutableList.of("Kate", "Mike"))
val people = pipeline.create(List(p1), Avros.specifics[Person])
val res = foos.by(_ => "key").join(people.by(_ => "key"))
println(res.materialize())
pipeline.done()
}
}