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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.spark.streaming
import org.apache.spark.streaming.scheduler._
import scala.collection.mutable.ArrayBuffer
import org.scalatest.matchers.ShouldMatchers
class StreamingListenerSuite extends TestSuiteBase with ShouldMatchers {
val input = (1 to 4).map(Seq(_)).toSeq
val operation = (d: DStream[Int]) => d.map(x => x)
// To make sure that the processing start and end times in collected
// information are different for successive batches
override def batchDuration = Milliseconds(100)
override def actuallyWait = true
test("basic BatchInfo generation") {
val ssc = setupStreams(input, operation)
val collector = new BatchInfoCollector
ssc.addStreamingListener(collector)
runStreams(ssc, input.size, input.size)
val batchInfos = collector.batchInfos
batchInfos should have size 4
batchInfos.foreach(info => {
info.schedulingDelay should not be None
info.processingDelay should not be None
info.totalDelay should not be None
info.schedulingDelay.get should be >= 0L
info.processingDelay.get should be >= 0L
info.totalDelay.get should be >= 0L
})
isInIncreasingOrder(batchInfos.map(_.submissionTime)) should be (true)
isInIncreasingOrder(batchInfos.map(_.processingStartTime.get)) should be (true)
isInIncreasingOrder(batchInfos.map(_.processingEndTime.get)) should be (true)
}
/** Check if a sequence of numbers is in increasing order */
def isInIncreasingOrder(seq: Seq[Long]): Boolean = {
for(i <- 1 until seq.size) {
if (seq(i - 1) > seq(i)) return false
}
true
}
/** Listener that collects information on processed batches */
class BatchInfoCollector extends StreamingListener {
val batchInfos = new ArrayBuffer[BatchInfo]
override def onBatchCompleted(batchCompleted: StreamingListenerBatchCompleted) {
batchInfos += batchCompleted.batchInfo
}
}
}
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