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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.status.api.v1.streaming
import java.util.Date
import javax.ws.rs.{GET, Produces}
import javax.ws.rs.core.MediaType
import org.apache.spark.streaming.ui.StreamingJobProgressListener
@Produces(Array(MediaType.APPLICATION_JSON))
private[v1] class StreamingStatisticsResource(listener: StreamingJobProgressListener) {
@GET
def streamingStatistics(): StreamingStatistics = {
listener.synchronized {
val batches = listener.retainedBatches
val avgInputRate = avgRate(batches.map(_.numRecords * 1000.0 / listener.batchDuration))
val avgSchedulingDelay = avgTime(batches.flatMap(_.schedulingDelay))
val avgProcessingTime = avgTime(batches.flatMap(_.processingDelay))
val avgTotalDelay = avgTime(batches.flatMap(_.totalDelay))
new StreamingStatistics(
startTime = new Date(listener.startTime),
batchDuration = listener.batchDuration,
numReceivers = listener.numReceivers,
numActiveReceivers = listener.numActiveReceivers,
numInactiveReceivers = listener.numInactiveReceivers,
numTotalCompletedBatches = listener.numTotalCompletedBatches,
numRetainedCompletedBatches = listener.retainedCompletedBatches.size,
numActiveBatches = listener.numUnprocessedBatches,
numProcessedRecords = listener.numTotalProcessedRecords,
numReceivedRecords = listener.numTotalReceivedRecords,
avgInputRate = avgInputRate,
avgSchedulingDelay = avgSchedulingDelay,
avgProcessingTime = avgProcessingTime,
avgTotalDelay = avgTotalDelay
)
}
}
private def avgRate(data: Seq[Double]): Option[Double] = {
if (data.isEmpty) None else Some(data.sum / data.size)
}
private def avgTime(data: Seq[Long]): Option[Long] = {
if (data.isEmpty) None else Some(data.sum / data.size)
}
}
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