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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2022 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.inventory.sync;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.onap.cps.ncmp.api.impl.yangmodels.YangModelCmHandle;
import org.onap.cps.spi.model.DataNode;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
@Slf4j
@RequiredArgsConstructor
@Component
public class ModuleSyncWatchdog {
private final SyncUtils syncUtils;
private final BlockingQueue<DataNode> moduleSyncWorkQueue;
private final Map<String, Object> moduleSyncStartedOnCmHandles;
private final ModuleSyncTasks moduleSyncTasks;
private static final int MODULE_SYNC_BATCH_SIZE = 100;
private static final long PREVENT_CPU_BURN_WAIT_TIME_MILLIS = 10;
private static final String VALUE_FOR_HAZELCAST_IN_PROGRESS_MAP = "Started";
/**
* Execute Cm Handle poll which changes the cm handle state from 'ADVISED' to 'READY'.
*/
@Scheduled(fixedDelayString = "${timers.advised-modules-sync.sleep-time-ms:5000}")
public void moduleSyncAdvisedCmHandles() {
populateWorkQueueIfNeeded();
while (!moduleSyncWorkQueue.isEmpty()) {
final Collection<DataNode> nextBatch = prepareNextBatch();
moduleSyncTasks.performModuleSync(nextBatch);
preventBusyWait();
}
}
/**
* Find any failed (locked) cm handles and change state back to 'ADVISED'.
*/
@Scheduled(fixedDelayString = "${timers.locked-modules-sync.sleep-time-ms:300000}")
public void resetPreviouslyFailedCmHandles() {
final List<YangModelCmHandle> failedCmHandles = syncUtils.getModuleSyncFailedCmHandles();
moduleSyncTasks.resetFailedCmHandles(failedCmHandles);
}
private void preventBusyWait() {
// This method isn't really needed until CPS-1200 Performance Improvement: Watchdog Parallel execution
// but leaving here to minimize impacts on this class for that Jira
try {
TimeUnit.MILLISECONDS.sleep(PREVENT_CPU_BURN_WAIT_TIME_MILLIS);
} catch (final InterruptedException e) {
Thread.currentThread().interrupt();
}
}
private void populateWorkQueueIfNeeded() {
if (moduleSyncWorkQueue.isEmpty()) {
final List<DataNode> advisedCmHandles = syncUtils.getAdvisedCmHandles();
for (final DataNode advisedCmHandle : advisedCmHandles) {
if (!moduleSyncWorkQueue.offer(advisedCmHandle)) {
log.warn("Unable to add cm handle {} to the work queue", advisedCmHandle.getLeaves().get("id"));
}
}
}
}
private Collection<DataNode> prepareNextBatch() {
final Collection<DataNode> nextBatchCandidates = new HashSet<>(MODULE_SYNC_BATCH_SIZE);
final Collection<DataNode> nextBatch = new HashSet<>(MODULE_SYNC_BATCH_SIZE);
moduleSyncWorkQueue.drainTo(nextBatchCandidates, MODULE_SYNC_BATCH_SIZE);
log.debug("nextBatchCandidates size : {}", nextBatchCandidates.size());
for (final DataNode batchCandidate : nextBatchCandidates) {
final String cmHandleId = String.valueOf(batchCandidate.getLeaves().get("id"));
final boolean alreadyAddedToInProgressMap = VALUE_FOR_HAZELCAST_IN_PROGRESS_MAP
.equals(moduleSyncStartedOnCmHandles.putIfAbsent(cmHandleId, VALUE_FOR_HAZELCAST_IN_PROGRESS_MAP));
if (alreadyAddedToInProgressMap) {
log.debug("module sync for {} already in progress by other instance", cmHandleId);
} else {
nextBatch.add(batchCandidate);
}
}
log.debug("nextBatch size : {}", nextBatch.size());
return nextBatch;
}
}
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