1 files changed, 43 insertions, 0 deletions
diff --git a/sources/hv-collector-kafka/src/main/kotlin/org/onap/dcae/collectors/veshv/kafka/api/ConsumerFactory.kt b/sources/hv-collector-kafka/src/main/kotlin/org/onap/dcae/collectors/veshv/kafka/api/ConsumerFactory.kt
new file mode 100644
index 00000000..88eb8cec
--- /dev/null
+++ b/sources/hv-collector-kafka/src/main/kotlin/org/onap/dcae/collectors/veshv/kafka/api/ConsumerFactory.kt
@@ -0,0 +1,43 @@
+/*
+ * ============LICENSE_START=======================================================
+ * dcaegen2-collectors-veshv
+ * ================================================================================
+ * Copyright (C) 2018-2019 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.kafka.api
+
+import org.onap.dcae.collectors.veshv.kafka.impl.KafkaSource
+import org.onap.dcae.collectors.veshv.utils.logging.Logger
+
+typealias ConsumerProvider = () -> KafkaConsumer
+
+object ConsumerFactory {
+    private val logger = Logger(ConsumerFactory::class)
+
+    fun createConsumersForTopics(kafkaBootstrapServers: String,
+                                 kafkaTopics: Set<String>,
+                                 consumerProvider: ConsumerProvider): Map<String, KafkaConsumer> =
+            KafkaSource.create(kafkaBootstrapServers, kafkaTopics).let { kafkaSource ->
+                val topicToConsumer = kafkaTopics.associate { it to consumerProvider() }
+                kafkaSource.start()
+                        .map {
+                            val topic = it.topic()
+                            topicToConsumer.get(topic)?.update(it)
+                                    ?: logger.warn { "No consumer configured for topic $topic" }
+                        }.subscribe()
+                topicToConsumer
+            }
+}