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MemoryStateStore.scala
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MemoryStateStore.scala
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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.sql.execution.streaming.state
import java.util.concurrent.ConcurrentHashMap
import org.apache.spark.sql.catalyst.expressions.UnsafeRow
class MemoryStateStore extends StateStore() {
import scala.collection.JavaConverters._
private val map = new ConcurrentHashMap[UnsafeRow, UnsafeRow]
override def iterator(): Iterator[UnsafeRowPair] = {
map.entrySet.iterator.asScala.map { case e => new UnsafeRowPair(e.getKey, e.getValue) }
}
override def get(key: UnsafeRow): UnsafeRow = map.get(key)
override def put(key: UnsafeRow, newValue: UnsafeRow): Unit = {
map.put(key.copy(), newValue.copy())
}
override def remove(key: UnsafeRow): Unit = {
map.remove(key)
}
override def commit(): Long = version + 1
override def abort(): Unit = {}
override def id: StateStoreId = null
override def version: Long = 0
override def metrics: StateStoreMetrics = new StateStoreMetrics(map.size, 0, Map.empty)
override def hasCommitted: Boolean = true
}