From 4151af827f4e04ffa7ea3235fbc4899183ea99bb Mon Sep 17 00:00:00 2001
From: lorenz <stu203404@mail.uni-kiel.de>
Date: Fri, 12 Mar 2021 12:02:29 +0100
Subject: [PATCH] Enhance empty query case
---
.../main/kotlin/theodolite/evaluation/MetricFetcher.kt | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/theodolite-quarkus/src/main/kotlin/theodolite/evaluation/MetricFetcher.kt b/theodolite-quarkus/src/main/kotlin/theodolite/evaluation/MetricFetcher.kt
index 883ead52c..da70ab10b 100644
--- a/theodolite-quarkus/src/main/kotlin/theodolite/evaluation/MetricFetcher.kt
+++ b/theodolite-quarkus/src/main/kotlin/theodolite/evaluation/MetricFetcher.kt
@@ -3,10 +3,13 @@ package theodolite.evaluation
import com.google.gson.Gson
import khttp.get
import khttp.responses.Response
+import mu.KotlinLogging
import theodolite.util.PrometheusResponse
import java.net.ConnectException
import java.util.*
+private val logger = KotlinLogging.logger {}
+
class MetricFetcher(private val prometheusURL: String) {
@@ -22,8 +25,15 @@ class MetricFetcher(private val prometheusURL: String) {
while (trys < 2) {
val response = get("$prometheusURL/api/v1/query_range", params = parameter)
if (response.statusCode != 200) {
+ val message = response.jsonObject.toString()
+ logger.warn { "Could not connect to Prometheus: $message, retrying now" }
trys++
} else {
+ var values = parseValues(response)
+ if (values.data?.result.isNullOrEmpty()) {
+ logger.warn { "Empty query result: $values" }
+ throw NoSuchFieldException()
+ }
return parseValues(response)
}
}
--
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