Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/21733#discussion_r206732676
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/streaming/state/StatefulOperatorsHelperSuite.scala
---
@@ -0,0 +1,121 @@
+/*
+ * 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 org.apache.spark.sql.catalyst.expressions.{Attribute,
SpecificInternalRow, UnsafeProjection, UnsafeRow}
+import
org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection
+import
org.apache.spark.sql.execution.streaming.StatefulOperatorsHelper.StreamingAggregationStateManager
+import org.apache.spark.sql.streaming.StreamTest
+import org.apache.spark.sql.types.{IntegerType, StructField, StructType}
+
+class StatefulOperatorsHelperSuite extends StreamTest {
+ import TestMaterial._
+
+ test("StateManager v1 - get, put, iter") {
+ val stateManager = newStateManager(KEYS_ATTRIBUTES, OUTPUT_ATTRIBUTES,
1)
+
+ // in V1, input row is stored as value
+ testGetPutIterOnStateManager(stateManager, OUTPUT_ATTRIBUTES,
TEST_ROW, TEST_KEY_ROW, TEST_ROW)
+ }
+
+ // ============================ StateManagerImplV2
============================
+ test("StateManager v2 - get, put, iter") {
+ val stateManager = newStateManager(KEYS_ATTRIBUTES, OUTPUT_ATTRIBUTES,
2)
+
+ // in V2, row for values itself (excluding keys from input row) is
stored as value
+ // so that stored value doesn't have key part, but state manager V2
will provide same output
+ // as V1 when getting row for key
+ testGetPutIterOnStateManager(stateManager, VALUES_ATTRIBUTES,
TEST_ROW, TEST_KEY_ROW,
+ TEST_VALUE_ROW)
+ }
+
+ private def newStateManager(
+ keysAttributes: Seq[Attribute],
+ outputAttributes: Seq[Attribute],
+ version: Int): StreamingAggregationStateManager = {
+ StreamingAggregationStateManager.createStateManager(keysAttributes,
outputAttributes, version)
+ }
+
+ private def testGetPutIterOnStateManager(
+ stateManager: StreamingAggregationStateManager,
+ expectedValueExpressions: Seq[Attribute],
+ inputRow: UnsafeRow,
+ expectedStateKey: UnsafeRow,
+ expectedStateValue: UnsafeRow): Unit = {
+
+ assert(stateManager.getValueExpressions === expectedValueExpressions)
+
+ val memoryStateStore = new MemoryStateStore()
+ stateManager.put(memoryStateStore, inputRow)
+
+ assert(memoryStateStore.iterator().size === 1)
+
+ val keyRow = stateManager.extractKey(inputRow)
+ assert(keyRow === expectedStateKey)
+
+ // iterate state store and verify whether expected format of key and
value are stored
+ val pair = memoryStateStore.iterator().next()
+ assert(pair.key === keyRow)
+ assert(pair.value === expectedStateValue)
+ assert(stateManager.restoreOriginRow(pair) === inputRow)
+
+ // verify the stored value once again via get
+ assert(memoryStateStore.get(keyRow) === expectedStateValue)
+
+ // state manager should return row which is same as input row
regardless of format version
+ assert(inputRow === stateManager.get(memoryStateStore, keyRow))
+ }
+
+}
+
+object TestMaterial {
+ val KEYS: Seq[String] = Seq("key1", "key2")
--- End diff --
Why are all of these in caps. Usually only simple constants like numbers or
strings are in caps. This looks weird.
Also putting them in an object later make me jump back and forth too much
to verify whats going on.
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