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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2022-2023 Nordix Foundation
* Modifications Copyright (C) 2022 Bell Canada
* ================================================================================
* 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.inventory.sync;
import static org.onap.cps.ncmp.api.impl.operations.DatastoreType.PASSTHROUGH_OPERATIONAL;
import com.fasterxml.jackson.databind.JsonNode;
import java.time.Duration;
import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.onap.cps.ncmp.api.impl.inventory.CmHandleQueries;
import org.onap.cps.ncmp.api.impl.inventory.CmHandleState;
import org.onap.cps.ncmp.api.impl.inventory.CompositeState;
import org.onap.cps.ncmp.api.impl.inventory.DataStoreSyncState;
import org.onap.cps.ncmp.api.impl.inventory.LockReasonCategory;
import org.onap.cps.ncmp.api.impl.operations.DmiDataOperations;
import org.onap.cps.ncmp.api.impl.utils.YangDataConverter;
import org.onap.cps.ncmp.api.impl.yangmodels.YangModelCmHandle;
import org.onap.cps.spi.FetchDescendantsOption;
import org.onap.cps.spi.model.DataNode;
import org.onap.cps.utils.JsonObjectMapper;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
@Slf4j
@Service
@RequiredArgsConstructor
public class SyncUtils {
private final CmHandleQueries cmHandleQueries;
private final DmiDataOperations dmiDataOperations;
private final JsonObjectMapper jsonObjectMapper;
private static final Pattern retryAttemptPattern = Pattern.compile("^Attempt #(\\d+) failed:");
/**
* Query data nodes for cm handles with an "ADVISED" cm handle state.
*
* @return cm handles (data nodes) in ADVISED state (empty list if none found)
*/
public List<DataNode> getAdvisedCmHandles() {
final List<DataNode> advisedCmHandlesAsDataNodes = cmHandleQueries.queryCmHandlesByState(CmHandleState.ADVISED);
log.debug("Total number of fetched advised cm handle(s) is (are) {}", advisedCmHandlesAsDataNodes.size());
return advisedCmHandlesAsDataNodes;
}
/**
* First query data nodes for cm handles with CM Handle Operational Sync State in "UNSYNCHRONIZED" and
* randomly select a CM Handle and query the data nodes for CM Handle State in "READY".
*
* @return a randomized yang model cm handle list with State in READY and Operation Sync State in "UNSYNCHRONIZED",
* return empty list if not found
*/
public List<YangModelCmHandle> getUnsynchronizedReadyCmHandles() {
final List<DataNode> unsynchronizedCmHandles = cmHandleQueries
.queryCmHandlesByOperationalSyncState(DataStoreSyncState.UNSYNCHRONIZED);
final List<YangModelCmHandle> yangModelCmHandles = new ArrayList<>();
for (final DataNode unsynchronizedCmHandle : unsynchronizedCmHandles) {
final String cmHandleId = unsynchronizedCmHandle.getLeaves().get("id").toString();
if (cmHandleQueries.cmHandleHasState(cmHandleId, CmHandleState.READY)) {
yangModelCmHandles.addAll(
convertCmHandlesDataNodesToYangModelCmHandles(
Collections.singletonList(unsynchronizedCmHandle)));
}
}
Collections.shuffle(yangModelCmHandles);
return yangModelCmHandles;
}
/**
* Query data nodes for cm handles with an "LOCKED" cm handle state with reason MODULE_SYNC_FAILED".
*
* @return a random LOCKED yang model cm handle, return null if not found
*/
public List<YangModelCmHandle> getModuleSyncFailedCmHandles() {
final List<DataNode> lockedCmHandlesAsDataNodeList = cmHandleQueries.queryCmHandleDataNodesByCpsPath(
"//lock-reason[@reason=\"MODULE_SYNC_FAILED\"]",
FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
return convertCmHandlesDataNodesToYangModelCmHandles(lockedCmHandlesAsDataNodeList);
}
/**
* Update Composite State attempts counter and set new lock reason and details.
*
* @param lockReasonCategory lock reason category
* @param errorMessage error message
*/
public void updateLockReasonDetailsAndAttempts(final CompositeState compositeState,
final LockReasonCategory lockReasonCategory,
final String errorMessage) {
int attempt = 1;
if (compositeState.getLockReason() != null) {
final Matcher matcher = retryAttemptPattern.matcher(compositeState.getLockReason().getDetails());
if (matcher.find()) {
attempt = 1 + Integer.parseInt(matcher.group(1));
}
}
compositeState.setLockReason(CompositeState.LockReason.builder()
.details(String.format("Attempt #%d failed: %s", attempt, errorMessage))
.lockReasonCategory(lockReasonCategory).build());
}
/**
* Check if a module sync retry is needed.
*
* @param compositeState the composite state currently in the locked state
* @return if the retry mechanism should be attempted
*/
public boolean needsModuleSyncRetry(final CompositeState compositeState) {
final OffsetDateTime time =
OffsetDateTime.parse(compositeState.getLastUpdateTime(),
DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSZ"));
final Matcher matcher = retryAttemptPattern.matcher(compositeState.getLockReason().getDetails());
final boolean failedDuringModuleSync = LockReasonCategory.MODULE_SYNC_FAILED
== compositeState.getLockReason().getLockReasonCategory();
if (!failedDuringModuleSync) {
log.info("Locked for other reason");
return false;
}
final int timeInMinutesUntilNextAttempt;
if (matcher.find()) {
timeInMinutesUntilNextAttempt = (int) Math.pow(2, Integer.parseInt(matcher.group(1)));
} else {
timeInMinutesUntilNextAttempt = 1;
log.info("First Attempt: no current attempts found.");
}
final int timeSinceLastAttempt = (int) Duration.between(time, OffsetDateTime.now()).toMinutes();
if (timeInMinutesUntilNextAttempt >= timeSinceLastAttempt) {
log.info("Time until next attempt is {} minutes: ",
timeInMinutesUntilNextAttempt - timeSinceLastAttempt);
return false;
}
log.info("Retry due now");
return true;
}
/**
* Get the Resourece Data from Node through DMI Passthrough service.
*
* @param cmHandleId cm handle id
* @return optional string containing the resource data
*/
public String getResourceData(final String cmHandleId) {
final ResponseEntity<Object> resourceDataResponseEntity = dmiDataOperations.getResourceDataFromDmi(
PASSTHROUGH_OPERATIONAL.getDatastoreName(),
cmHandleId,
UUID.randomUUID().toString());
if (resourceDataResponseEntity.getStatusCode().is2xxSuccessful()) {
return getFirstResource(resourceDataResponseEntity.getBody());
}
return null;
}
private String getFirstResource(final Object responseBody) {
final String jsonObjectAsString = jsonObjectMapper.asJsonString(responseBody);
final JsonNode overallJsonNode = jsonObjectMapper.convertToJsonNode(jsonObjectAsString);
final Iterator<Map.Entry<String, JsonNode>> overallJsonTreeMap = overallJsonNode.fields();
final Map.Entry<String, JsonNode> firstElement = overallJsonTreeMap.next();
return jsonObjectMapper.asJsonString(Map.of(firstElement.getKey(), firstElement.getValue()));
}
private static List<YangModelCmHandle> convertCmHandlesDataNodesToYangModelCmHandles(
final List<DataNode> cmHandlesAsDataNodeList) {
return cmHandlesAsDataNodeList.stream()
.map(cmHandle -> YangDataConverter.convertCmHandleToYangModel(cmHandle,
cmHandle.getLeaves().get("id").toString())).collect(Collectors.toList());
}
}
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