1 files changed, 83 insertions, 0 deletions
diff --git a/hv-collector-core/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/VesHvCollector.kt b/hv-collector-core/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/VesHvCollector.kt
new file mode 100644
index 00000000..af9d0b0a
--- /dev/null
+++ b/hv-collector-core/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/VesHvCollector.kt
@@ -0,0 +1,83 @@
+/*
+ * ============LICENSE_START=======================================================
+ * dcaegen2-collectors-veshv
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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
+
+import io.netty.buffer.ByteBuf
+import org.onap.dcae.collectors.veshv.boundary.Collector
+import org.onap.dcae.collectors.veshv.boundary.Sink
+import org.onap.dcae.collectors.veshv.domain.RoutedMessage
+import org.onap.dcae.collectors.veshv.domain.VesMessage
+import reactor.core.publisher.Flux
+import reactor.core.publisher.Mono
+
+/**
+ * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
+ * @since May 2018
+ */
+internal class VesHvCollector(
+        val wireDecoder: WireDecoder,
+        val protobufDecoder: VesDecoder,
+        val validator: MessageValidator,
+        val router: Router,
+        val sink: Sink) : Collector {
+    override fun handleConnection(dataStream: Flux<ByteBuf>): Mono<Void> =
+            dataStream
+                    .flatMap(this::decodeWire)
+                    .flatMap(this::decodeProtobuf)
+                    .filter(this::validate)
+                    .flatMap(this::findRoute)
+                    .compose(sink::send)
+                    .doOnNext(this::releaseMemory)
+                    .then()
+
+    private fun decodeWire(wire: ByteBuf) = releaseWhenNull(wire, wireDecoder::decode)
+
+    private fun decodeProtobuf(protobuf: ByteBuf) = releaseWhenNull(protobuf, protobufDecoder::decode)
+
+    private fun validate(msg: VesMessage): Boolean {
+        val valid = validator.isValid(msg)
+        if (!valid) {
+            msg.rawMessage.release()
+        }
+        return valid
+    }
+
+    private fun findRoute(msg: VesMessage): Mono<RoutedMessage> {
+        val routedMessage = router.findDestination(msg)
+        return if (routedMessage == null)
+            Mono.empty()
+        else
+            Mono.just(routedMessage)
+    }
+
+    private fun releaseMemory(msg: VesMessage) {
+        msg.rawMessage.release()
+    }
+
+    private fun <T>releaseWhenNull(input: ByteBuf, mapper: (ByteBuf) -> T?): Mono<T> {
+        val result = mapper(input)
+        return if (result == null) {
+            input.release()
+            Mono.empty()
+        } else {
+            Mono.just(result)
+        }
+    }
+}