gerrit.onap Code Review - dcaegen2/collectors/hv-ves.git/blob

   1 /*
   2  * ============LICENSE_START=======================================================
   3  * dcaegen2-collectors-veshv
   4  * ================================================================================
   5  * Copyright (C) 2018 NOKIA
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20 package org.onap.dcae.collectors.veshv.ves.message.generator.impl
  21
  22 import com.google.protobuf.ByteString
  23 import org.onap.dcae.collectors.veshv.domain.ByteData
  24 import org.onap.dcae.collectors.veshv.domain.PayloadContentType
  25 import org.onap.dcae.collectors.veshv.domain.WireFrameMessage
  26 import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageGenerator
  27 import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageParameters
  28 import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType
  29 import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.FIXED_PAYLOAD
  30 import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.INVALID_GPB_DATA
  31 import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.INVALID_WIRE_FRAME
  32 import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.TOO_BIG_PAYLOAD
  33 import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.VALID
  34 import org.onap.ves.VesEventOuterClass.VesEvent
  35 import org.onap.ves.VesEventOuterClass.CommonEventHeader
  36
  37 import reactor.core.publisher.Flux
  38 import reactor.core.publisher.Mono
  39 import java.nio.charset.Charset
  40
  41 /**
  42  * @author Jakub Dudycz <jakub.dudycz@nokia.com>
  43  * @since June 2018
  44  */
  45 class MessageGeneratorImpl internal constructor(
  46         private val payloadGenerator: PayloadGenerator,
  47         private val maxPayloadSizeBytes: Int
  48 ) : MessageGenerator {
  49
  50     override fun createMessageFlux(messageParameters: List<MessageParameters>): Flux<WireFrameMessage> = Flux
  51             .fromIterable(messageParameters)
  52             .flatMap { createMessageFlux(it) }
  53
  54     private fun createMessageFlux(parameters: MessageParameters): Flux<WireFrameMessage> =
  55             Mono.fromCallable { createMessage(parameters.commonEventHeader, parameters.messageType) }
  56                     .let {
  57                         if (parameters.amount < 0)
  58                             it.repeat()
  59                         else
  60                             it.repeat(parameters.amount)
  61                     }
  62
  63     private fun createMessage(commonEventHeader: CommonEventHeader, messageType: MessageType): WireFrameMessage =
  64             when (messageType) {
  65                 VALID ->
  66                     WireFrameMessage(vesEvent(commonEventHeader, payloadGenerator.generatePayload()))
  67                 TOO_BIG_PAYLOAD ->
  68                     WireFrameMessage(vesEvent(commonEventHeader, oversizedPayload()))
  69                 FIXED_PAYLOAD ->
  70                     WireFrameMessage(vesEvent(commonEventHeader, fixedPayload()))
  71                 INVALID_WIRE_FRAME -> {
  72                     val payload = ByteData(vesEvent(commonEventHeader, payloadGenerator.generatePayload()))
  73                     WireFrameMessage(
  74                             payload,
  75                             UNSUPPORTED_VERSION,
  76                             UNSUPPORTED_VERSION,
  77                             PayloadContentType.GOOGLE_PROTOCOL_BUFFER.hexValue,
  78                             payload.size())
  79                 }
  80                 INVALID_GPB_DATA ->
  81                     WireFrameMessage("invalid vesEvent".toByteArray(Charset.defaultCharset()))
  82             }
  83
  84     private fun vesEvent(commonEventHeader: CommonEventHeader, eventFields: ByteString): ByteArray {
  85         return createVesEvent(commonEventHeader, eventFields).toByteArray()
  86     }
  87
  88     private fun createVesEvent(commonEventHeader: CommonEventHeader, payload: ByteString): VesEvent =
  89             VesEvent.newBuilder()
  90                     .setCommonEventHeader(commonEventHeader)
  91                     .setEventFields(payload)
  92                     .build()
  93
  94     private fun oversizedPayload() =
  95             payloadGenerator.generateRawPayload(maxPayloadSizeBytes + 1)
  96
  97     private fun fixedPayload() =
  98             payloadGenerator.generateRawPayload(MessageGenerator.FIXED_PAYLOAD_SIZE)
  99
 100     companion object {
 101         private const val UNSUPPORTED_VERSION: Short = 2
 102     }
 103 }