From c34f15d4971f028c8b9336d5b3d16df17c43db46 Mon Sep 17 00:00:00 2001
From: Samir Talwar <samir.talwar@digitalasset.com>
Date: Fri, 28 Aug 2020 09:48:50 +0200
Subject: [PATCH] participant-integration-api: Create the metrics CSV
 directory. (#7253)

It turns out that if you give the CSV reporter a non-existent directory,
it crashes. I did not expect this.

This constructs the directory so you don't have to worry about that.

CHANGELOG_BEGIN
CHANGELOG_END
---
 .../main/scala/platform/configuration/MetricsReporter.scala | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/ledger/participant-integration-api/src/main/scala/platform/configuration/MetricsReporter.scala b/ledger/participant-integration-api/src/main/scala/platform/configuration/MetricsReporter.scala
index 81219000b0d..62c206e55e1 100644
--- a/ledger/participant-integration-api/src/main/scala/platform/configuration/MetricsReporter.scala
+++ b/ledger/participant-integration-api/src/main/scala/platform/configuration/MetricsReporter.scala
@@ -4,7 +4,7 @@
 package com.daml.platform.configuration
 
 import java.net.{InetSocketAddress, URI}
-import java.nio.file.{Path, Paths}
+import java.nio.file.{Files, Path, Paths}
 
 import com.codahale.metrics
 import com.codahale.metrics.{MetricRegistry, ScheduledReporter}
@@ -26,10 +26,12 @@ object MetricsReporter {
   }
 
   final case class Csv(directory: Path) extends MetricsReporter {
-    override def register(registry: MetricRegistry): ScheduledReporter =
+    override def register(registry: MetricRegistry): ScheduledReporter = {
+      Files.createDirectories(directory)
       metrics.CsvReporter
         .forRegistry(registry)
         .build(directory.toFile)
+    }
   }
 
   final case class Graphite(address: InetSocketAddress, prefix: Option[String] = None)