1 files changed, 66 insertions, 0 deletions
diff --git a/sources/hv-collector-dcae-app-simulator/src/main/kotlin/org/onap/dcae/collectors/veshv/simulators/dcaeapp/impl/adapters/KafkaSource.kt b/sources/hv-collector-dcae-app-simulator/src/main/kotlin/org/onap/dcae/collectors/veshv/simulators/dcaeapp/impl/adapters/KafkaSource.kt
new file mode 100644
index 00000000..10dedbdf
--- /dev/null
+++ b/sources/hv-collector-dcae-app-simulator/src/main/kotlin/org/onap/dcae/collectors/veshv/simulators/dcaeapp/impl/adapters/KafkaSource.kt
@@ -0,0 +1,66 @@
+/*
+ * ============LICENSE_START=======================================================
+ * dcaegen2-collectors-veshv
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.dcae.collectors.veshv.simulators.dcaeapp.impl.adapters
+
+import arrow.effects.IO
+import org.apache.kafka.clients.consumer.ConsumerConfig
+import org.apache.kafka.common.serialization.ByteArrayDeserializer
+import org.onap.dcae.collectors.veshv.simulators.dcaeapp.impl.Consumer
+import org.onap.dcae.collectors.veshv.utils.arrow.evaluateIo
+import org.onap.dcae.collectors.veshv.utils.logging.Logger
+import reactor.kafka.receiver.KafkaReceiver
+import reactor.kafka.receiver.ReceiverOptions
+
+/**
+ * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
+ * @since May 2018
+ */
+class KafkaSource(private val receiver: KafkaReceiver<ByteArray, ByteArray>) {
+
+    fun start(): IO<Consumer> = IO {
+        val consumer = Consumer()
+        receiver.receive().map(consumer::update).evaluateIo().subscribe()
+        consumer
+    }
+
+    companion object {
+        private val logger = Logger(KafkaSource::class)
+
+        fun create(bootstrapServers: String, topics: Set<String>): KafkaSource {
+            return KafkaSource(KafkaReceiver.create(createReceiverOptions(bootstrapServers, topics)))
+        }
+
+        fun createReceiverOptions(bootstrapServers: String,
+                                  topics: Set<String>): ReceiverOptions<ByteArray, ByteArray>? {
+            val props = mapOf<String, Any>(
+                    ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG to bootstrapServers,
+                    ConsumerConfig.CLIENT_ID_CONFIG to "hv-collector-dcae-app-simulator",
+                    ConsumerConfig.GROUP_ID_CONFIG to "hv-collector-simulators",
+                    ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG to ByteArrayDeserializer::class.java,
+                    ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG to ByteArrayDeserializer::class.java,
+                    ConsumerConfig.AUTO_OFFSET_RESET_CONFIG to "earliest"
+            )
+            return ReceiverOptions.create<ByteArray, ByteArray>(props)
+                    .addAssignListener { partitions -> logger.debug { "Partitions assigned $partitions" } }
+                    .addRevokeListener { partitions -> logger.debug { "Partitions revoked $partitions" } }
+                    .subscription(topics)
+        }
+    }
+}