spark StreamingQueryStatusStore 源码
spark StreamingQueryStatusStore 代码
文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/StreamingQueryStatusStore.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.spark.sql.execution.ui
import java.util.UUID
import org.apache.spark.sql.streaming.ui.{StreamingQueryData, StreamingQueryProgressWrapper, StreamingQueryUIData}
import org.apache.spark.status.KVUtils
import org.apache.spark.util.kvstore.KVStore
/**
* Provides a view of a KVStore with methods that make it easy to query Streaming Query state.
* There's no state kept in this class, so it's ok to have multiple instances of it in an
* application.
*/
class StreamingQueryStatusStore(store: KVStore) {
def allQueryUIData: Seq[StreamingQueryUIData] = {
val view = store.view(classOf[StreamingQueryData]).index("startTimestamp").first(0L)
KVUtils.viewToSeq(view).map(makeUIData)
}
// visible for test
private[sql] def getQueryProgressData(runId: UUID): Seq[StreamingQueryProgressWrapper] = {
val view = store.view(classOf[StreamingQueryProgressWrapper])
.index("runId").first(runId.toString).last(runId.toString)
KVUtils.viewToSeq(view)
}
private def makeUIData(summary: StreamingQueryData): StreamingQueryUIData = {
val runId = summary.runId
val view = store.view(classOf[StreamingQueryProgressWrapper])
.index("runId").first(runId).last(runId)
val recentProgress = KVUtils.viewToSeq(view)
.map(_.progress).sortBy(_.timestamp).toArray
StreamingQueryUIData(summary, recentProgress)
}
}
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