Read HV-VES healtcheck api port from cmd line

Issue-ID: DCAEGEN2-1364
Change-Id: I17c38d7397174fadc7d382cfa3dd0b3a7f4d97ff
Signed-off-by: kjaniak <kornel.janiak@nokia.com>

3 files changed, 76 insertions, 8 deletions

diff --git a/sources/hv-collector-configuration/src/main/kotlin/org/onap/dcae/collectors/veshv/config/api/ConfigurationModule.kt b/sources/hv-collector-configuration/src/main/kotlin/org/onap/dcae/collectors/veshv/config/api/ConfigurationModule.kt
index 9f8c552b..1b9248b5 100644
--- a/sources/hv-collector-configuration/src/main/kotlin/org/onap/dcae/collectors/veshv/config/api/ConfigurationModule.kt
+++ b/sources/hv-collector-configuration/src/main/kotlin/org/onap/dcae/collectors/veshv/config/api/ConfigurationModule.kt
@@ -19,6 +19,7 @@
  */
 package org.onap.dcae.collectors.veshv.config.api
 
+import arrow.core.getOrElse
 import org.onap.dcae.collectors.veshv.config.api.model.HvVesConfiguration
 import org.onap.dcae.collectors.veshv.config.api.model.MissingArgumentException
 import org.onap.dcae.collectors.veshv.config.api.model.ValidationException
@@ -29,13 +30,16 @@ import org.onap.dcae.collectors.veshv.utils.arrow.throwOnLeft
 import reactor.core.publisher.Flux
 
 class ConfigurationModule {
+    private val DEFAULT_HEALTHCHECK_PORT: Int = 6060
 
     private val cmd = ArgHvVesConfiguration()
     private val configReader = FileConfigurationReader()
     private val configValidator = ConfigurationValidator()
 
+    fun healthCheckPort(args: Array<String>): Int = cmd.parseToInt(args).getOrElse { DEFAULT_HEALTHCHECK_PORT }
+
     fun hvVesConfigurationUpdates(args: Array<String>): Flux<HvVesConfiguration> =
-            Flux.just(cmd.parse(args))
+            Flux.just(cmd.parseToFile(args))
                     .throwOnLeft { MissingArgumentException(it.message, it.cause) }
                     .map { it.reader().use(configReader::loadConfig) }
                     .map { configValidator.validate(it) }
diff --git a/sources/hv-collector-configuration/src/main/kotlin/org/onap/dcae/collectors/veshv/config/impl/ArgHvVesConfiguration.kt b/sources/hv-collector-configuration/src/main/kotlin/org/onap/dcae/collectors/veshv/config/impl/ArgHvVesConfiguration.kt
index 9587d5b0..71ed509b 100644
--- a/sources/hv-collector-configuration/src/main/kotlin/org/onap/dcae/collectors/veshv/config/impl/ArgHvVesConfiguration.kt
+++ b/sources/hv-collector-configuration/src/main/kotlin/org/onap/dcae/collectors/veshv/config/impl/ArgHvVesConfiguration.kt
@@ -19,18 +19,72 @@
  */
 package org.onap.dcae.collectors.veshv.config.impl
 
+import arrow.core.Either
 import arrow.core.Option
+import arrow.core.Try
+import arrow.core.flatMap
 import org.apache.commons.cli.CommandLine
+import org.apache.commons.cli.CommandLineParser
 import org.apache.commons.cli.DefaultParser
-import org.onap.dcae.collectors.veshv.commandline.ArgBasedConfiguration
+import org.apache.commons.cli.Options
 import org.onap.dcae.collectors.veshv.commandline.CommandLineOption.CONFIGURATION_FILE
+import org.onap.dcae.collectors.veshv.commandline.CommandLineOption.HEALTH_CHECK_API_PORT
+import org.onap.dcae.collectors.veshv.commandline.WrongArgumentError
+import org.onap.dcae.collectors.veshv.commandline.intValue
 import org.onap.dcae.collectors.veshv.commandline.stringValue
 import java.io.File
 
-internal class ArgHvVesConfiguration : ArgBasedConfiguration<File>(DefaultParser()) {
-    override val cmdLineOptionsList = listOf(CONFIGURATION_FILE)
+class ArgHvVesConfiguration(private val parser: CommandLineParser = DefaultParser()) {
+    val cmdLineOptionsList = listOf(CONFIGURATION_FILE, HEALTH_CHECK_API_PORT)
 
-    override fun getConfiguration(cmdLine: CommandLine): Option<File> =
+    fun getConfiguration(cmdLine: CommandLine): Option<File> =
             cmdLine.stringValue(CONFIGURATION_FILE).map(::File)
 
+    fun getHealthcheckPort(cmdLine: CommandLine): Option<Int> =
+            cmdLine.intValue(HEALTH_CHECK_API_PORT)
+
+    lateinit var parsingResult: CommandLine
+
+    fun parseToFile(args: Array<out String>): Either<WrongArgumentError, File> {
+        parseIfEmpty(args)
+        return Try { parsingResult }.toEither()
+                .mapLeft { WrongArgumentError(it, cmdLineOptionsList) }
+                .map(this::getConfiguration)
+                .flatMap {
+                    it.toEither {
+                        WrongArgumentError(
+                                message = "Unexpected error when parsing command line arguments",
+                                cmdLineOptionsList = cmdLineOptionsList)
+                    }
+                }
+    }
+
+    fun parseToInt(args: Array<out String>): Either<WrongArgumentError, Int> {
+        parseIfEmpty(args)
+        return Try { parsingResult }.toEither()
+                .mapLeft { WrongArgumentError(it, cmdLineOptionsList) }
+                .map(this::getHealthcheckPort)
+                .flatMap {
+                    it.toEither {
+                        WrongArgumentError(
+                                message = "Unexpected error when parsing command line arguments",
+                                cmdLineOptionsList = cmdLineOptionsList)
+                    }
+                }
+    }
+
+    private fun parseIfEmpty(args: Array<out String>) {
+        if (!this::parsingResult.isInitialized) {
+            parsingResult = parseArgumentsArray(args)
+        }
+    }
+
+    private fun parseArgumentsArray(args: Array<out String>) =
+            cmdLineOptionsList
+                    .map { it.option }
+                    .fold(Options(), Options::addOption)
+                    .let { parser.parse(it, args) }
+
 }
+
+
diff --git a/sources/hv-collector-configuration/src/test/kotlin/org/onap/dcae/collectors/veshv/config/impl/ArgHvVesConfigurationTest.kt b/sources/hv-collector-configuration/src/test/kotlin/org/onap/dcae/collectors/veshv/config/impl/ArgHvVesConfigurationTest.kt
index dbe757c4..6fe76958 100644
--- a/sources/hv-collector-configuration/src/test/kotlin/org/onap/dcae/collectors/veshv/config/impl/ArgHvVesConfigurationTest.kt
+++ b/sources/hv-collector-configuration/src/test/kotlin/org/onap/dcae/collectors/veshv/config/impl/ArgHvVesConfigurationTest.kt
@@ -19,6 +19,7 @@
  */
 package org.onap.dcae.collectors.veshv.config.impl
 
+import arrow.core.identity
 import org.assertj.core.api.Assertions.assertThat
 import org.jetbrains.spek.api.Spek
 import org.jetbrains.spek.api.dsl.describe
@@ -27,8 +28,6 @@ import org.jetbrains.spek.api.dsl.it
 import org.jetbrains.spek.api.dsl.on
 import org.onap.dcae.collectors.veshv.commandline.WrongArgumentError
 import org.onap.dcae.collectors.veshv.tests.utils.absoluteResourcePath
-import org.onap.dcae.collectors.veshv.tests.utils.parseExpectingFailure
-import org.onap.dcae.collectors.veshv.tests.utils.parseExpectingSuccess
 import java.io.File
 
 /**
@@ -70,4 +69,15 @@ object ArgVesHvConfigurationTest : Spek({
             }
         }
     }
-})
\ No newline at end of file
+})
+
+fun ArgHvVesConfiguration.parseExpectingSuccess(vararg cmdLine: String): File =
+        parseToFile(cmdLine).fold(
+                { throw AssertionError("Parsing result should be present") },
+                ::identity
+        )
+
+fun ArgHvVesConfiguration.parseExpectingFailure(vararg cmdLine: String): WrongArgumentError =
+        parseToFile(cmdLine).fold(
+                ::identity
+        ) { throw AssertionError("parsing should have failed") }