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/*
* Copyright © 2017-2018 AT&T Intellectual Property.
* Modifications Copyright © 2018 IBM.
*
* 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.
*/
package org.onap.ccsdk.cds.controllerblueprints.resource.dict.service
import org.apache.commons.collections.CollectionUtils
import org.apache.commons.lang3.StringUtils
import org.apache.commons.lang3.text.StrBuilder
import org.onap.ccsdk.cds.controllerblueprints.core.BluePrintException
import org.onap.ccsdk.cds.controllerblueprints.core.utils.TopologicalSortingUtils
import org.onap.ccsdk.cds.controllerblueprints.resource.dict.ResourceAssignment
import org.slf4j.LoggerFactory
import java.io.Serializable
/**
* ResourceAssignmentValidationService.
*
* @author Brinda Santh
*/
interface ResourceAssignmentValidationService : Serializable {
@Throws(BluePrintException::class)
fun validate(resourceAssignments: List<ResourceAssignment>): Boolean
}
/**
* ResourceAssignmentValidationServiceImpl.
*
* @author Brinda Santh
*/
open class ResourceAssignmentValidationServiceImpl : ResourceAssignmentValidationService {
private val log = LoggerFactory.getLogger(ResourceAssignmentValidationServiceImpl::class.java)
open var resourceAssignmentMap: Map<String, ResourceAssignment> = hashMapOf()
open val validationMessage = StrBuilder()
override fun validate(resourceAssignments: List<ResourceAssignment>): Boolean {
try {
validateTemplateNDictionaryKeys(resourceAssignments)
validateCyclicDependency(resourceAssignments)
if (StringUtils.isNotBlank(validationMessage)) {
throw BluePrintException("Resource Assignment Validation Failure")
}
} catch (e: Exception) {
throw BluePrintException("Resource Assignment Validation :" + validationMessage.toString(), e)
}
return true
}
open fun validateTemplateNDictionaryKeys(resourceAssignments: List<ResourceAssignment>) {
resourceAssignmentMap = resourceAssignments.map { it.name to it }.toMap()
// Check the Resource Assignment has Duplicate Key Names
val duplicateKeyNames = resourceAssignments.groupBy { it.name }
.filter { it.value.size > 1 }
.map { it.key }
if (duplicateKeyNames.isNotEmpty()) {
validationMessage.appendln(String.format("Duplicate Assignment Template Keys (%s) is Present", duplicateKeyNames))
}
// Collect all the dependencies as a single list
val dependenciesNames = resourceAssignments.mapNotNull { it.dependencies }.flatten()
// Check all the dependencies keys have Resource Assignment mappings.
val notPresentDictionaries = dependenciesNames.filter { !resourceAssignmentMap.containsKey(it) }.distinct()
if (notPresentDictionaries.isNotEmpty()) {
validationMessage.appendln(String.format("No assignments for Dictionary Keys (%s)", notPresentDictionaries))
}
if (StringUtils.isNotBlank(validationMessage)) {
throw BluePrintException("Resource Assignment Validation Failure")
}
}
open fun validateCyclicDependency(resourceAssignments: List<ResourceAssignment>) {
val startResourceAssignment = ResourceAssignment()
startResourceAssignment.name = "*"
val topologySorting = TopologicalSortingUtils<ResourceAssignment>()
resourceAssignmentMap.map { it.value }.map { resourceAssignment ->
if (CollectionUtils.isNotEmpty(resourceAssignment.dependencies)) {
resourceAssignment.dependencies!!.map {
log.trace("Topological Graph link from {} to {}", it, resourceAssignment.name)
topologySorting.add(resourceAssignmentMap[it]!!, resourceAssignment)
}
} else {
topologySorting.add(startResourceAssignment, resourceAssignment)
}
}
if (!topologySorting.isDag) {
val graph = getTopologicalGraph(topologySorting)
validationMessage.appendln("Cyclic Dependency :$graph")
}
}
open fun getTopologicalGraph(topologySorting: TopologicalSortingUtils<ResourceAssignment>): String {
val s = StringBuilder()
val neighbors = topologySorting.getNeighbors()
neighbors.forEach { v, vs ->
if (v.name == "*") {
s.append("\n * -> [")
for (resourceAssignment in vs) {
s.append(
"(" + resourceAssignment.dictionaryName + ":" + resourceAssignment.name +
"),"
)
}
s.append("]")
} else {
s.append("\n (" + v.dictionaryName + ":" + v.name + ") -> [")
for (resourceAssignment in vs) {
s.append(
"(" + resourceAssignment.dictionaryName + ":" + resourceAssignment.name +
"),"
)
}
s.append("]")
}
}
return s.toString()
}
}
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