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(private val payloadGenerator: PayloadGenerator) : MessageGenerator {
  46
  47     override fun createMessageFlux(messageParameters: List<MessageParameters>): Flux<WireFrameMessage> = Flux
  48             .fromIterable(messageParameters)
  49             .flatMap { createMessageFlux(it) }
  50
  51     private fun createMessageFlux(parameters: MessageParameters): Flux<WireFrameMessage> =
  52             Mono.fromCallable { createMessage(parameters.commonEventHeader, parameters.messageType) }
  53                     .let {
  54                         if (parameters.amount < 0)
  55                             it.repeat()
  56                         else
  57                             it.repeat(parameters.amount)
  58                     }
  59
  60     private fun createMessage(commonEventHeader: CommonEventHeader, messageType: MessageType): WireFrameMessage =
  61             when (messageType) {
  62                 VALID ->
  63                     WireFrameMessage(vesEvent(commonEventHeader, payloadGenerator.generatePayload()))
  64                 TOO_BIG_PAYLOAD ->
  65                     WireFrameMessage(vesEvent(commonEventHeader, oversizedPayload()))
  66                 FIXED_PAYLOAD ->
  67                     WireFrameMessage(vesEvent(commonEventHeader, fixedPayload()))
  68                 INVALID_WIRE_FRAME -> {
  69                     val payload = ByteData(vesEvent(commonEventHeader, payloadGenerator.generatePayload()))
  70                     WireFrameMessage(
  71                             payload,
  72                             UNSUPPORTED_VERSION,
  73                             UNSUPPORTED_VERSION,
  74                             PayloadContentType.GOOGLE_PROTOCOL_BUFFER.hexValue,
  75                             payload.size())
  76                 }
  77                 INVALID_GPB_DATA ->
  78                     WireFrameMessage("invalid vesEvent".toByteArray(Charset.defaultCharset()))
  79             }
  80
  81     private fun vesEvent(commonEventHeader: CommonEventHeader, eventFields: ByteString): ByteArray {
  82         return createVesEvent(commonEventHeader, eventFields).toByteArray()
  83     }
  84
  85     private fun createVesEvent(commonEventHeader: CommonEventHeader, payload: ByteString): VesEvent =
  86             VesEvent.newBuilder()
  87                     .setCommonEventHeader(commonEventHeader)
  88                     .setEventFields(payload)
  89                     .build()
  90
  91     private fun oversizedPayload() =
  92             payloadGenerator.generateRawPayload(WireFrameMessage.MAX_PAYLOAD_SIZE + 1)
  93
  94     private fun fixedPayload() =
  95             payloadGenerator.generateRawPayload(MessageGenerator.FIXED_PAYLOAD_SIZE)
  96
  97     companion object {
  98         private const val UNSUPPORTED_VERSION: Short = 2
  99     }
 100 }