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/*
* Copyright © 2018-2019 AT&T Intellectual Property.
*
* 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.blueprintsprocessor.functions.message.prioritization.utils
import org.apache.kafka.streams.processor.ProcessorSupplier
import org.onap.ccsdk.cds.blueprintsprocessor.core.cluster.optionalClusterService
import org.onap.ccsdk.cds.blueprintsprocessor.core.service.ClusterLock
import org.onap.ccsdk.cds.blueprintsprocessor.functions.message.prioritization.db.MessagePrioritization
import org.onap.ccsdk.cds.blueprintsprocessor.functions.message.prioritization.kafka.AbstractMessagePrioritizeProcessor
import org.onap.ccsdk.cds.blueprintsprocessor.functions.message.prioritization.toFormatedCorrelation
import org.onap.ccsdk.cds.controllerblueprints.core.BlueprintProcessorException
import org.onap.ccsdk.cds.controllerblueprints.core.service.BlueprintDependencyService
object MessageProcessorUtils {
/** Utility to create the cluster lock for message [messagePrioritization] prioritization procssing.*/
suspend fun prioritizationGrouplock(messagePrioritization: MessagePrioritization): ClusterLock? {
val clusterService = BlueprintDependencyService.optionalClusterService()
return if (clusterService != null && clusterService.clusterJoined() &&
!messagePrioritization.correlationId.isNullOrBlank()
) {
// Get the correlation key in ascending order, even it it is misplaced
val correlationId = messagePrioritization.toFormatedCorrelation()
val lockName = "prioritize::${messagePrioritization.group}::$correlationId"
val clusterLock = clusterService.clusterLock(lockName)
clusterLock.lock()
if (!clusterLock.isLocked()) throw BlueprintProcessorException("failed to lock($lockName)")
clusterLock
} else null
}
/** Utility to create the cluster lock for expiry scheduler*/
suspend fun prioritizationExpiryLock(): ClusterLock? {
val clusterService = BlueprintDependencyService.optionalClusterService()
return if (clusterService != null && clusterService.clusterJoined()) {
val lockName = "prioritize-expiry"
val clusterLock = clusterService.clusterLock(lockName)
clusterLock.lock()
if (!clusterLock.isLocked()) throw BlueprintProcessorException("failed to lock($lockName)")
clusterLock
} else null
}
/** Utility to create the cluster lock for expiry scheduler*/
suspend fun prioritizationCleanLock(): ClusterLock? {
val clusterService = BlueprintDependencyService.optionalClusterService()
return if (clusterService != null && clusterService.clusterJoined()) {
val lockName = "prioritize-clean"
val clusterLock = clusterService.clusterLock(lockName)
clusterLock.lock()
if (!clusterLock.isLocked()) throw BlueprintProcessorException("failed to lock($lockName)")
clusterLock
} else null
}
/** Utility used to cluster unlock for message [clusterLock] */
suspend fun prioritizationUnLock(clusterLock: ClusterLock?) {
if (clusterLock != null) {
clusterLock.unLock()
clusterLock.close()
}
}
/** Get the Kafka Supplier for processor lookup [name] **/
fun <K, V> bluePrintProcessorSupplier(name: String): ProcessorSupplier<K, V> {
return ProcessorSupplier<K, V> {
// Dynamically resolve the Prioritization Processor
BlueprintDependencyService.instance<AbstractMessagePrioritizeProcessor<K, V>>(name)
}
}
}
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