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/*
* ============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.ncmp.api.impl;
import static org.onap.cps.ncmp.api.impl.constants.DmiRegistryConstants.NCMP_DATASPACE_NAME;
import static org.onap.cps.ncmp.api.impl.constants.DmiRegistryConstants.NCMP_DMI_REGISTRY_ANCHOR;
import static org.onap.cps.ncmp.api.impl.utils.YangDataConverter.convertYangModelCmHandleToNcmpServiceCmHandle;
import static org.onap.cps.spi.FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS;
import static org.onap.cps.utils.CmHandleQueryRestParametersValidator.validateModuleNameConditionProperties;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.onap.cps.ncmp.api.NetworkCmProxyCmHandlerQueryService;
import org.onap.cps.ncmp.api.impl.utils.YangDataConverter;
import org.onap.cps.ncmp.api.models.NcmpServiceCmHandle;
import org.onap.cps.spi.CpsAdminPersistenceService;
import org.onap.cps.spi.CpsDataPersistenceService;
import org.onap.cps.spi.model.Anchor;
import org.onap.cps.spi.model.CmHandleQueryServiceParameters;
import org.onap.cps.spi.model.ConditionProperties;
import org.onap.cps.spi.model.DataNode;
import org.springframework.stereotype.Service;
@Service
@Slf4j
@RequiredArgsConstructor
public class NetworkCmProxyCmHandlerQueryServiceImpl implements NetworkCmProxyCmHandlerQueryService {
private static final String PROPERTY_QUERY_NAME = "hasAllProperties";
private static final String MODULE_QUERY_NAME = "hasAllModules";
private static final Object NO_QUERY_EXECUTED = null;
private final CpsDataPersistenceService cpsDataPersistenceService;
private final CpsAdminPersistenceService cpsAdminPersistenceService;
/**
* Query and return cm handles that match the given query parameters.
*
* @param cmHandleQueryServiceParameters the cm handle query parameters
* @return collection of cm handles
*/
@Override
public Set<NcmpServiceCmHandle> queryCmHandles(
final CmHandleQueryServiceParameters cmHandleQueryServiceParameters) {
if (cmHandleQueryServiceParameters.getCmHandleQueryParameters().isEmpty()) {
return getAllCmHandles();
}
final Map<String, NcmpServiceCmHandle> publicPropertyQueryResult
= executePublicPropertyQueries(cmHandleQueryServiceParameters);
final Map<String, NcmpServiceCmHandle> combinedQueryResult =
combineWithModuleNameQuery(cmHandleQueryServiceParameters, publicPropertyQueryResult);
return combinedQueryResult == NO_QUERY_EXECUTED
? Collections.emptySet() : new HashSet<NcmpServiceCmHandle>(combinedQueryResult.values());
}
/**
* Query and return cm handles that match the given query parameters.
*
* @param cmHandleQueryServiceParameters the cm handle query parameters
* @return collection of cm handle ids
*/
@Override
public Set<String> queryCmHandleIds(
final CmHandleQueryServiceParameters cmHandleQueryServiceParameters) {
if (cmHandleQueryServiceParameters.getCmHandleQueryParameters().isEmpty()) {
return getAllCmHandleIds();
}
final Map<String, NcmpServiceCmHandle> publicPropertyQueryResult
= executePublicPropertyQueries(cmHandleQueryServiceParameters);
final Collection<String> moduleNamesForQuery =
getModuleNamesForQuery(cmHandleQueryServiceParameters.getCmHandleQueryParameters());
if (moduleNamesForQuery.isEmpty()) {
return publicPropertyQueryResult == NO_QUERY_EXECUTED
? Collections.emptySet() : publicPropertyQueryResult.keySet();
}
final Set<String> moduleNameQueryResult = getNamesOfAnchorsWithGivenModules(moduleNamesForQuery);
if (publicPropertyQueryResult == NO_QUERY_EXECUTED) {
return moduleNameQueryResult;
}
moduleNameQueryResult.retainAll(publicPropertyQueryResult.keySet());
return moduleNameQueryResult;
}
private Map<String, NcmpServiceCmHandle> executePublicPropertyQueries(
final CmHandleQueryServiceParameters cmHandleQueryServiceParameters) {
final Map<String, String> publicPropertyQueryPairs =
getPublicPropertyPairs(cmHandleQueryServiceParameters.getCmHandleQueryParameters());
if (publicPropertyQueryPairs.isEmpty()) {
return null;
}
Map<String, NcmpServiceCmHandle> cmHandleIdToNcmpServiceCmHandles = null;
for (final Map.Entry<String, String> entry : publicPropertyQueryPairs.entrySet()) {
final String cmHandlePath = "//public-properties[@name='" + entry.getKey() + "' and @value='"
+ entry.getValue() + "']/ancestor::cm-handles";
final Collection<DataNode> dataNodes = queryDataNodes(cmHandlePath);
if (cmHandleIdToNcmpServiceCmHandles == NO_QUERY_EXECUTED) {
cmHandleIdToNcmpServiceCmHandles = collectDataNodesToNcmpServiceCmHandles(dataNodes);
} else {
final Collection<String> cmHandleIdsToRetain = dataNodes.parallelStream()
.map(dataNode -> dataNode.getLeaves().get("id").toString()).collect(Collectors.toSet());
cmHandleIdToNcmpServiceCmHandles.keySet().retainAll(cmHandleIdsToRetain);
}
if (cmHandleIdToNcmpServiceCmHandles.isEmpty()) {
break;
}
}
return cmHandleIdToNcmpServiceCmHandles;
}
private Map<String, NcmpServiceCmHandle> combineWithModuleNameQuery(
final CmHandleQueryServiceParameters cmHandleQueryServiceParameters,
final Map<String, NcmpServiceCmHandle> previousQueryResult) {
final Collection<String> moduleNamesForQuery =
getModuleNamesForQuery(cmHandleQueryServiceParameters.getCmHandleQueryParameters());
if (moduleNamesForQuery.isEmpty()) {
return previousQueryResult;
}
final Collection<String> cmHandleIdsByModuleName = getNamesOfAnchorsWithGivenModules(moduleNamesForQuery);
if (cmHandleIdsByModuleName.isEmpty()) {
return Collections.emptyMap();
}
final Map<String, NcmpServiceCmHandle> queryResult = new HashMap<>(cmHandleIdsByModuleName.size());
if (previousQueryResult == NO_QUERY_EXECUTED) {
//TODO Discuss performance/scaling of getting ALL cmHandles here
getAllCmHandles().forEach(ncmpServiceCmHandle -> {
if (cmHandleIdsByModuleName.contains(ncmpServiceCmHandle.getCmHandleId())) {
queryResult.put(ncmpServiceCmHandle.getCmHandleId(), ncmpServiceCmHandle);
}
});
return queryResult;
}
previousQueryResult.keySet().retainAll(cmHandleIdsByModuleName);
queryResult.putAll(previousQueryResult);
return queryResult;
}
private Set<String> getNamesOfAnchorsWithGivenModules(final Collection<String> moduleNamesForQuery) {
final Collection<Anchor> anchors =
cpsAdminPersistenceService.queryAnchors("NFP-Operational", moduleNamesForQuery);
return anchors.parallelStream().map(Anchor::getName).collect(Collectors.toSet());
}
private Map<String, NcmpServiceCmHandle> collectDataNodesToNcmpServiceCmHandles(
final Collection<DataNode> dataNodes) {
final Map<String, NcmpServiceCmHandle> cmHandleIdToNcmpServiceCmHandle = new HashMap<>();
dataNodes.forEach(dataNode -> {
final NcmpServiceCmHandle ncmpServiceCmHandle = createNcmpServiceCmHandle(dataNode);
cmHandleIdToNcmpServiceCmHandle.put(ncmpServiceCmHandle.getCmHandleId(), ncmpServiceCmHandle);
});
return cmHandleIdToNcmpServiceCmHandle;
}
private List<Map<String, String>> getConditions(final List<ConditionProperties> conditionProperties,
final String name) {
for (final ConditionProperties conditionProperty : conditionProperties) {
if (conditionProperty.getConditionName().equals(name)) {
return conditionProperty.getConditionParameters();
}
}
return Collections.emptyList();
}
private Collection<String> getModuleNamesForQuery(final List<ConditionProperties> conditionProperties) {
final List<String> result = new ArrayList<>();
getConditions(conditionProperties, MODULE_QUERY_NAME).parallelStream().forEach(
conditionProperty -> {
validateModuleNameConditionProperties(conditionProperty);
result.add(conditionProperty.get("moduleName"));
}
);
return result;
}
private Map<String, String> getPublicPropertyPairs(final List<ConditionProperties> conditionProperties) {
final Map<String, String> result = new HashMap<>();
getConditions(conditionProperties, PROPERTY_QUERY_NAME).forEach(result::putAll);
return result;
}
private Set<NcmpServiceCmHandle> getAllCmHandles() {
return queryDataNodes("/dmi-registry/cm-handles").stream()
.map(this::createNcmpServiceCmHandle).collect(Collectors.toSet());
}
private Set<String> getAllCmHandleIds() {
return cpsAdminPersistenceService.getAnchors("NFP-Operational")
.parallelStream().map(Anchor::getName).collect(Collectors.toSet());
}
private List<DataNode> queryDataNodes(final String cmHandlePath) {
return cpsDataPersistenceService.queryDataNodes(NCMP_DATASPACE_NAME, NCMP_DMI_REGISTRY_ANCHOR,
cmHandlePath, INCLUDE_ALL_DESCENDANTS);
}
private NcmpServiceCmHandle createNcmpServiceCmHandle(final DataNode dataNode) {
return convertYangModelCmHandleToNcmpServiceCmHandle(YangDataConverter
.convertCmHandleToYangModel(dataNode, dataNode.getLeaves().get("id").toString()));
}
}
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