ms/blueprintsprocessor/functions/message-prioritizaion/src/main/kotlin/org/onap/ccsdk/cds/blueprintsprocessor/functions/message/prioritization/MessagePrioritizationConsumer.kt

   1 /*
   2  * Copyright © 2018-2019 AT&T Intellectual Property.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.onap.ccsdk.cds.blueprintsprocessor.functions.message.prioritization
  18
  19 import org.apache.kafka.common.serialization.Serdes
  20 import org.apache.kafka.streams.Topology
  21 import org.onap.ccsdk.cds.blueprintsprocessor.functions.message.prioritization.topology.MessagePrioritizationSerde
  22 import org.onap.ccsdk.cds.blueprintsprocessor.functions.message.prioritization.utils.MessageProcessorUtils.bluePrintProcessorSupplier
  23 import org.onap.ccsdk.cds.blueprintsprocessor.message.KafkaStreamsBasicAuthConsumerProperties
  24 import org.onap.ccsdk.cds.blueprintsprocessor.message.MessageConsumerProperties
  25 import org.onap.ccsdk.cds.blueprintsprocessor.message.service.BluePrintMessageLibPropertyService
  26 import org.onap.ccsdk.cds.blueprintsprocessor.message.service.BlueprintMessageConsumerService
  27 import org.onap.ccsdk.cds.blueprintsprocessor.message.service.KafkaStreamConsumerFunction
  28 import org.onap.ccsdk.cds.controllerblueprints.core.logger
  29
  30 open class MessagePrioritizationConsumer(
  31     private val bluePrintMessageLibPropertyService: BluePrintMessageLibPropertyService
  32 ) {
  33
  34     private val log = logger(MessagePrioritizationConsumer::class)
  35
  36     lateinit var streamingConsumerService: BlueprintMessageConsumerService
  37
  38     open fun consumerService(selector: String): BlueprintMessageConsumerService {
  39         return bluePrintMessageLibPropertyService
  40             .blueprintMessageConsumerService(selector)
  41     }
  42
  43     open fun kafkaStreamConsumerFunction(prioritizationConfiguration: PrioritizationConfiguration):
  44             KafkaStreamConsumerFunction {
  45         return object : KafkaStreamConsumerFunction {
  46
  47             override suspend fun createTopology(
  48                 messageConsumerProperties: MessageConsumerProperties,
  49                 additionalConfig: Map<String, Any>?
  50             ): Topology {
  51
  52                 val topology = Topology()
  53                 val kafkaStreamsBasicAuthConsumerProperties = messageConsumerProperties
  54                         as KafkaStreamsBasicAuthConsumerProperties
  55
  56                 val topics = kafkaStreamsBasicAuthConsumerProperties.topic.split(",")
  57                 log.info("Consuming prioritization topics($topics)")
  58
  59                 topology.addSource(MessagePrioritizationConstants.SOURCE_INPUT, *topics.toTypedArray())
  60
  61                 topology.addProcessor(
  62                     MessagePrioritizationConstants.PROCESSOR_PRIORITIZE,
  63                     bluePrintProcessorSupplier<ByteArray, ByteArray>(
  64                         MessagePrioritizationConstants.PROCESSOR_PRIORITIZE,
  65                         prioritizationConfiguration
  66                     ),
  67                     MessagePrioritizationConstants.SOURCE_INPUT
  68                 )
  69
  70                 topology.addProcessor(
  71                     MessagePrioritizationConstants.PROCESSOR_AGGREGATE,
  72                     bluePrintProcessorSupplier<String, String>(
  73                         MessagePrioritizationConstants.PROCESSOR_AGGREGATE,
  74                         prioritizationConfiguration
  75                     ),
  76                     MessagePrioritizationConstants.PROCESSOR_PRIORITIZE
  77                 )
  78
  79                 topology.addProcessor(
  80                     MessagePrioritizationConstants.PROCESSOR_OUTPUT,
  81                     bluePrintProcessorSupplier<String, String>(
  82                         MessagePrioritizationConstants.PROCESSOR_OUTPUT,
  83                         prioritizationConfiguration
  84                     ),
  85                     MessagePrioritizationConstants.PROCESSOR_AGGREGATE
  86                 )
  87
  88                 topology.addSink(
  89                     MessagePrioritizationConstants.SINK_EXPIRED,
  90                     prioritizationConfiguration.expiredTopic,
  91                     Serdes.String().serializer(), MessagePrioritizationSerde().serializer(),
  92                     MessagePrioritizationConstants.PROCESSOR_PRIORITIZE
  93                 )
  94
  95                 /** To receive completed and error messages */
  96                 topology.addSink(
  97                     MessagePrioritizationConstants.SINK_OUTPUT,
  98                     prioritizationConfiguration.outputTopic,
  99                     Serdes.String().serializer(), MessagePrioritizationSerde().serializer(),
 100                     MessagePrioritizationConstants.PROCESSOR_PRIORITIZE,
 101                     MessagePrioritizationConstants.PROCESSOR_AGGREGATE,
 102                     MessagePrioritizationConstants.PROCESSOR_OUTPUT
 103                 )
 104
 105                 // Output will be sent to the group-output topic from Processor API
 106                 return topology
 107             }
 108         }
 109     }
 110
 111     suspend fun startConsuming(prioritizationConfiguration: PrioritizationConfiguration) {
 112         streamingConsumerService = consumerService(prioritizationConfiguration.inputTopicSelector)
 113
 114         // Dynamic Consumer Function to create Topology
 115         val consumerFunction = kafkaStreamConsumerFunction(prioritizationConfiguration)
 116         streamingConsumerService.consume(null, consumerFunction)
 117     }
 118
 119     suspend fun shutDown() {
 120         if (streamingConsumerService != null) {
 121             streamingConsumerService.shutDown()
 122         }
 123     }
 124 }