Node API - GET Method performance issue (junit)

Reviewers: Toine, Sourabh, Levente

Issue-ID: CPS-1171
Signed-off-by: JosephKeenan <joseph.keenan@est.tech>
Change-Id: I8e59d686ead079d751a459c5933592423aa15ace

diff --git a/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsToDataNodePerfSpec.groovy b/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsToDataNodePerfSpec.groovy
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@@ -0,0 +1,89 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation
+ *  ================================================================================
+ *  Licensed 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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ri.performance
+
+import org.apache.commons.lang3.time.StopWatch
+import org.onap.cps.spi.CpsDataPersistenceService
+import org.onap.cps.spi.impl.CpsPersistenceSpecBase
+import org.onap.cps.spi.model.DataNode
+import org.onap.cps.spi.model.DataNodeBuilder
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.test.context.jdbc.Sql
+import static org.onap.cps.spi.FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS
+
+class CpsToDataNodePerfSpec extends CpsPersistenceSpecBase {
+
+    @Autowired
+    CpsDataPersistenceService objectUnderTest
+
+    static final String SET_DATA = '/data/fragment.sql'
+    static final String  XPATH_DATA_NODE_WITH_DESCENDANTS = '/parent-1'
+
+    @Sql([CLEAR_DATA, SET_DATA])
+    def 'Get data node by xpath with all descendants with many children'() {
+        given: 'nodes and grandchildren have been persisted'
+            def setupStopWatch = new StopWatch()
+            setupStopWatch.start()
+            createLineage()
+            setupStopWatch.stop()
+            def setupDurationInMillis = setupStopWatch.getTime()
+        when: 'data node is requested with all descendants'
+            def readStopWatch = new StopWatch()
+            readStopWatch.start()
+            def result = objectUnderTest.getDataNode(
+                DATASPACE_NAME, ANCHOR_NAME1, XPATH_DATA_NODE_WITH_DESCENDANTS, INCLUDE_ALL_DESCENDANTS)
+            readStopWatch.stop()
+            def readDurationInMillis = readStopWatch.getTime()
+        then : 'setup duration is under 8 seconds'
+            assert setupDurationInMillis < 8000
+        and: 'read duration is under 3.5 seconds'
+            assert readDurationInMillis < 3500
+        and: 'data node is returned with all the descendants populated'
+            assert countDataNodes(result) == 1533
+    }
+
+    def createLineage() {
+        def numOfChildren = 30
+        def numOfGrandChildren = 50
+        (1..numOfChildren).each {
+            def childName = "perf-test-child-${it}".toString()
+            def newChild = goForthAndMultiply(XPATH_DATA_NODE_WITH_DESCENDANTS, childName, numOfGrandChildren)
+            objectUnderTest.addChildDataNode(DATASPACE_NAME, ANCHOR_NAME1, XPATH_DATA_NODE_WITH_DESCENDANTS, newChild)
+        }
+    }
+
+    def goForthAndMultiply(parentXpath, childName, numOfGrandChildren) {
+        def children = []
+        (1..numOfGrandChildren).each {
+            def child = new DataNodeBuilder().withXpath("${parentXpath}/${childName}/${it}-grand-child").build()
+            children.add(child)
+        }
+        return new DataNodeBuilder().withXpath("${parentXpath}/${childName}").withChildDataNodes(children).build()
+    }
+
+    def countDataNodes(DataNode dataNode) {
+        int nodeCount = 1
+        for (DataNode child : dataNode.childDataNodes) {
+            nodeCount = nodeCount + (countDataNodes(child))
+        }
+        return nodeCount
+    }
+}
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