1 files changed, 82 insertions, 0 deletions
diff --git a/sources/hv-collector-core/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/adapters/kafka/KafkaSink.kt b/sources/hv-collector-core/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/adapters/kafka/KafkaSink.kt
new file mode 100644
index 00000000..a0c22418
--- /dev/null
+++ b/sources/hv-collector-core/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/adapters/kafka/KafkaSink.kt
@@ -0,0 +1,82 @@
+/*
+ * ============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.impl.adapters.kafka
+
+import org.onap.dcae.collectors.veshv.boundary.Sink
+import org.onap.dcae.collectors.veshv.model.RoutedMessage
+import org.onap.dcae.collectors.veshv.model.VesMessage
+import org.onap.dcae.collectors.veshv.utils.logging.Logger
+import org.onap.ves.VesEventOuterClass.CommonEventHeader
+import reactor.core.publisher.Flux
+import reactor.kafka.sender.KafkaSender
+import reactor.kafka.sender.SenderRecord
+import reactor.kafka.sender.SenderResult
+import java.util.concurrent.atomic.AtomicLong
+
+/**
+ * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
+ * @since May 2018
+ */
+internal class KafkaSink(private val sender: KafkaSender<CommonEventHeader, VesMessage>) : Sink {
+    private val sentMessages = AtomicLong(0)
+
+    override fun send(messages: Flux<RoutedMessage>): Flux<RoutedMessage> {
+        val records = messages.map(this::vesToKafkaRecord)
+        val result = sender.send(records)
+                .doOnNext(::logException)
+                .filter(::isSuccessful)
+                .map { it.correlationMetadata() }
+
+        return if (logger.traceEnabled) {
+            result.doOnNext(::logSentMessage)
+        } else {
+            result
+        }
+    }
+
+    private fun vesToKafkaRecord(msg: RoutedMessage): SenderRecord<CommonEventHeader, VesMessage, RoutedMessage> {
+        return SenderRecord.create(
+                msg.topic,
+                msg.partition,
+                System.currentTimeMillis(),
+                msg.message.header,
+                msg.message,
+                msg)
+    }
+
+    private fun logException(senderResult: SenderResult<out Any>) {
+        if (senderResult.exception() != null) {
+            logger.warn(senderResult.exception()) { "Failed to send message to Kafka" }
+        }
+    }
+
+    private fun logSentMessage(sentMsg: RoutedMessage) {
+        logger.trace {
+            val msgNum = sentMessages.incrementAndGet()
+            "Message #$msgNum has been sent to ${sentMsg.topic}:${sentMsg.partition}"
+        }
+    }
+
+    private fun isSuccessful(senderResult: SenderResult<out Any>) = senderResult.exception() == null
+
+    companion object {
+        val logger = Logger(KafkaSink::class)
+    }
+}