HV VES Collector seed code

Contains squashed commits up to 11fe6b63 (2018-05-30). The whole
contains a basic project structure. We are trying to put rest of the
commits one by one so we do not loose the history.

Bellow there are messages of the single commits in this squashed bulk:

Basic project setup
Create base maven project with Gitlab CI configuration.
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Merging guildeline
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Add remote branch delete command
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Sample runtime in Kotlin - PoC
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Setup project internal architecture
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Message routing
Determine target topic and partition by VES Common Header.
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Parse GPB message header
fkrzywka <filip.krzywka@nokia.com>

Set listen port based on command line args
Use Apache Commons CLI to parse cmd line args.
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Drop invalid GPB messages
Instead of propagating error and closing stream just drop the message
and proceed. Final handling logic may include closing the connection or
sending some message depending on the specification.
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Add Apache license file
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Convert to maven multi-module project
fkrzywka <filip.krzywka@nokia.com>

Component tests with current GPB schema
* Using v5 draft protobuf definition
* Code reorganized to so component boundaries are more visible
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Thin logging facade over slf4j
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Introduce code analysis tools
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Implemented reading configuration from consul

Ves Common Header validation added (required parameters existance check)

Micro benchmark for direct vs on-heap NIO buffers
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Decode wire protocol and fix (most?) memory leaks
Proposed wire protocol is just a suggestion and will (should) change
in the future.
Netty's ByteBuf is a reference-counted wrapper over a memory chunk. It
is crucial to free unused buffers by means of release() method.
The general rule regarding memory management was suggested. Let's put
all memory-cleanup logic in main VesHvCollector class so other classes
could focus on their job.
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Minor cleanup
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Add license info in files
Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

Change-Id: Ic484aa107eba48ad48f8ab222799e1795dffa865
Issue-ID: DCAEGEN2-601
Signed-off-by: Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

5 files changed, 348 insertions, 0 deletions

diff --git a/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/ArgBasedServerConfiguration.kt b/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/ArgBasedServerConfiguration.kt
new file mode 100644
index 00000000..6311b6c0
--- /dev/null
+++ b/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/ArgBasedServerConfiguration.kt
@@ -0,0 +1,82 @@
+/*
+ * ============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.main
+
+import org.apache.commons.cli.*
+import org.onap.dcae.collectors.veshv.domain.ServerConfiguration
+
+internal object DefaultValues {
+    const val PORT = 8600
+    const val CONFIG_URL = ""
+}
+
+internal object ArgBasedServerConfiguration {
+    private val OPT_PORT = Option.builder("p")
+            .longOpt("listen-port")
+            .hasArg()
+            .desc("Listen port")
+            .build()
+
+    private val OPT_CONFIG_URL = Option.builder("c")
+            .longOpt("config-url")
+            .optionalArg(true)
+            .hasArg()
+            .desc("Url of ves configuration on consul")
+            .build()
+
+    private val options by lazy {
+        val options = Options()
+        options.addOption(OPT_PORT)
+        options.addOption(OPT_CONFIG_URL)
+        options
+    }
+
+    fun parse(args: Array<out String>): ServerConfiguration {
+        val parser = DefaultParser()
+
+        try {
+            parser.parse(options, args).run {
+                return ServerConfiguration(
+                        intValue(OPT_PORT, DefaultValues.PORT),
+                        stringValue(OPT_CONFIG_URL, DefaultValues.CONFIG_URL))
+            }
+        } catch (ex: Exception) {
+            throw WrongArgumentException(ex)
+        }
+    }
+
+    private fun CommandLine.intValue(option: Option, default: Int) =
+            getOptionValue(option.opt)?.toInt() ?: default
+
+    private fun CommandLine.stringValue(option: Option, default: String) =
+            getOptionValue(option.opt) ?: default
+
+
+    class WrongArgumentException(parent: Exception) : Exception(parent.message, parent) {
+        fun printMessage() {
+            println(message)
+        }
+
+        fun printHelp(programName: String) {
+            val formatter = HelpFormatter()
+            formatter.printHelp(programName, options)
+        }
+    }
+}
diff --git a/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/main.kt b/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/main.kt
new file mode 100644
index 00000000..d81a063d
--- /dev/null
+++ b/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/main.kt
@@ -0,0 +1,72 @@
+/*
+ * ============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.main
+
+import org.onap.dcae.collectors.veshv.boundary.ConfigurationProvider
+import org.onap.dcae.collectors.veshv.domain.CollectorConfiguration
+import org.onap.dcae.collectors.veshv.domain.ServerConfiguration
+import org.onap.dcae.collectors.veshv.domain.routing
+import org.onap.dcae.collectors.veshv.factory.CollectorFactory
+import org.onap.dcae.collectors.veshv.factory.ServerFactory
+import org.onap.dcae.collectors.veshv.impl.adapters.AdapterFactory
+import org.onap.dcae.collectors.veshv.main.ArgBasedServerConfiguration.WrongArgumentException
+import org.onap.ves.VesEventV5.VesEvent.CommonEventHeader.Domain
+import org.slf4j.LoggerFactory
+import kotlin.system.exitProcess
+
+private val logger = LoggerFactory.getLogger("main")
+
+fun main(args: Array<String>) {
+    try {
+        val serverConfiguration = ArgBasedServerConfiguration.parse(args)
+
+        val collectorProvider = CollectorFactory(
+                resolveConfigurationProvider(serverConfiguration),
+                AdapterFactory.kafkaSink()
+        ).createVesHvCollectorProvider()
+        ServerFactory.createNettyTcpServer(serverConfiguration, collectorProvider).start().block()
+    } catch (ex: WrongArgumentException) {
+        ex.printMessage()
+        ex.printHelp("java org.onap.dcae.collectors.veshv.main.MainKt")
+        exitProcess(1)
+    }
+}
+
+
+private fun resolveConfigurationProvider(serverConfiguration: ServerConfiguration): ConfigurationProvider {
+
+    if (serverConfiguration.configurationUrl.isEmpty()) {
+        logger.info("Configuration url not specified - using default config")
+        val sampleConfig = CollectorConfiguration(
+                kafkaBootstrapServers = "dmaap.cluster.local:9969",
+                routing = routing {
+                    defineRoute {
+                        fromDomain(Domain.HVRANMEAS)
+                        toTopic("ves_hvRanMeas")
+                        withFixedPartitioning()
+                    }
+                }.build()
+        )
+        return AdapterFactory.staticConfigurationProvider(sampleConfig)
+    }
+
+    logger.info("Using configuration url: ${serverConfiguration.configurationUrl}")
+    return AdapterFactory.consulConfigurationProvider(serverConfiguration.configurationUrl)
+}
diff --git a/hv-collector-main/src/main/resources/logback.xml b/hv-collector-main/src/main/resources/logback.xml
new file mode 100644
index 00000000..809f62d4
--- /dev/null
+++ b/hv-collector-main/src/main/resources/logback.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+  <property name="LOG_FILE"
+    value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}ves-hv.log}"/>
+  <property name="FILE_LOG_PATTERN" value="%d{yyyy-MM-dd'T'HH:mm:ss.SSSXXX,UTC} %-5level [%-40.40logger{10}] - %msg%n"/>
+
+  <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>
+        %d{yyyy-MM-dd'T'HH:mm:ss.SSSXXX,UTC} %highlight(%-5level) [%-40.40logger{10}] - %msg%n
+      </pattern>
+    </encoder>
+  </appender>
+
+    <appender name="ROLLING-FILE"
+      class="ch.qos.logback.core.rolling.RollingFileAppender">
+      <encoder>
+        <pattern>${FILE_LOG_PATTERN}</pattern>
+      </encoder>
+      <file>${LOG_FILE}</file>
+      <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
+        <fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.log</fileNamePattern>
+        <maxFileSize>50MB</maxFileSize>
+        <maxHistory>30</maxHistory>
+        <totalSizeCap>10GB</totalSizeCap>
+      </rollingPolicy>
+    </appender>
+
+  <logger name="org.onap.dcae.collectors.veshv" level="DEBUG"/>
+
+  <root level="INFO">
+      <appender-ref ref="CONSOLE"/>
+      <appender-ref ref="ROLLING-FILE"/>
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/hv-collector-main/src/test/kotlin/org/onap/dcae/collectors/veshv/main/ArgBasedServerConfigurationTest.kt b/hv-collector-main/src/test/kotlin/org/onap/dcae/collectors/veshv/main/ArgBasedServerConfigurationTest.kt
new file mode 100644
index 00000000..0d2188ca
--- /dev/null
+++ b/hv-collector-main/src/test/kotlin/org/onap/dcae/collectors/veshv/main/ArgBasedServerConfigurationTest.kt
@@ -0,0 +1,72 @@
+/*
+ * ============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.main
+
+import org.assertj.core.api.Assertions.assertThat
+import org.jetbrains.spek.api.Spek
+import org.jetbrains.spek.api.dsl.given
+import org.jetbrains.spek.api.dsl.it
+
+/**
+ * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
+ * @since May 2018
+ */
+object ArgBasedServerConfigurationTest : Spek({
+    val cut = ArgBasedServerConfiguration
+    val configurationUrl = "http://test-address/test"
+
+    fun parse(vararg cmdLine: String) = cut.parse(cmdLine)
+
+    given("all parameters are present in the long form") {
+        val result = parse("--listen-port", "6969", "--config-url", configurationUrl)
+
+        it("should set proper port") {
+            assertThat(result.port).isEqualTo(6969)
+        }
+
+        it("should set proper config url") {
+            assertThat(result.configurationUrl).isEqualTo(configurationUrl)
+        }
+    }
+
+    given("all parameters are present in the short form") {
+        val result = parse("-p", "666", "-c", configurationUrl)
+
+        it("should set proper port") {
+            assertThat(result.port).isEqualTo(666)
+        }
+
+        it("should set proper config url") {
+            assertThat(result.configurationUrl).isEqualTo(configurationUrl)
+        }
+    }
+
+    given("all optional parameters are absent") {
+        val result = parse()
+
+        it("should set default port") {
+            assertThat(result.port).isEqualTo(DefaultValues.PORT)
+        }
+
+        it("should set default config url") {
+            assertThat(result.configurationUrl).isEqualTo(DefaultValues.CONFIG_URL)
+        }
+    }
+})
\ No newline at end of file
diff --git a/hv-collector-main/src/test/kotlin/org/onap/dcae/collectors/veshv/main/NioBuffersTest.kt b/hv-collector-main/src/test/kotlin/org/onap/dcae/collectors/veshv/main/NioBuffersTest.kt
new file mode 100644
index 00000000..b46d5a28
--- /dev/null
+++ b/hv-collector-main/src/test/kotlin/org/onap/dcae/collectors/veshv/main/NioBuffersTest.kt
@@ -0,0 +1,87 @@
+/*
+ * ============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.main
+
+import org.jetbrains.spek.api.Spek
+import org.jetbrains.spek.api.dsl.describe
+import org.jetbrains.spek.api.dsl.it
+import java.nio.ByteBuffer
+
+fun Int.toKibibytes(): Int = this * 1024
+fun Int.toMebibytes(): Int = this * 1024 * 1024
+
+
+object NioBuffersTest : Spek({
+    val BUFFER_SIZES = listOf(128.toKibibytes(), 512.toKibibytes(), 1.toMebibytes(), 2.toMebibytes())
+    val NUMBER_OF_ITERATIONS = 100
+
+    fun measureCopyTimeInNanos(bb1: ByteBuffer, bb2: ByteBuffer): Double {
+        bb1.clear()
+        bb2.clear()
+        val start = System.nanoTime()
+        while (bb2.remaining() > 0)
+            bb2.putInt(bb1.getInt())
+        val time = System.nanoTime() - start
+        val operations = bb1.capacity() / Integer.BYTES
+        return time.toDouble() / operations
+    }
+
+    fun measureAverageCopyTimeInNanos(bb1: ByteBuffer, bb2: ByteBuffer): Double =
+            (0..NUMBER_OF_ITERATIONS).map { measureCopyTimeInNanos(bb1, bb2) }.average()
+
+    fun measureAndPrintAverageCopyTime(message: String, bb1: ByteBuffer, bb2: ByteBuffer) {
+        val avg = measureAverageCopyTimeInNanos(bb1, bb2)
+        System.out.printf("Each putInt+getInt for %s took an average of %.1f ns%n", message, avg)
+    }
+
+    for (singleBufferSize in BUFFER_SIZES) {
+
+        describe("$singleBufferSize bytes buffers") {
+            describe("direct buffers") {
+
+                val bb1 = ByteBuffer.allocateDirect(singleBufferSize)
+                val bb2 = ByteBuffer.allocateDirect(singleBufferSize)
+
+                it("should be heated up") {
+                    measureAverageCopyTimeInNanos(bb1, bb2)
+                }
+
+                it("should work fast") {
+                    measureAndPrintAverageCopyTime("direct buffers of $singleBufferSize bytes", bb1, bb2)
+                }
+            }
+
+            describe("on-heap buffers") {
+
+                val bb1 = ByteBuffer.allocate(singleBufferSize)
+                val bb2 = ByteBuffer.allocate(singleBufferSize)
+
+                it("should be heated up") {
+                    measureAverageCopyTimeInNanos(bb1, bb2)
+                }
+
+                it("should work fast") {
+                    measureAndPrintAverageCopyTime("onheap buffers of $singleBufferSize bytes", bb1, bb2)
+                }
+            }
+        }
+    }
+
+})
\ No newline at end of file