Ankur Mhatre
4b6cefa60a
Companion repository for the ankurm.com article. Every transcript in docs/output/ was produced by running this project; scripts/run-all.sh regenerates all of them. Verified against Spring Boot 4.1.1 / Framework 7.0.9 / Security 7.1.1 / Micrometer 1.17.1 / kafka-clients 4.2.1 on Temurin JDK 25.0.4.1+1.
25 lines
1.1 KiB
Bash
Executable File
25 lines
1.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# A health indicator with no timeout, and what it does to the endpoint.
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set -uo pipefail
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cd "$(dirname "$0")/.."
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OUT=docs/output/10-slow-upstream.txt
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B=http://localhost:8080
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{
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echo "### profile: details upstream deliberately sleeping 30s per request"
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echo "### demo.upstream.timeout-ms = 750, so the indicator gives up long before the stub replies"
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echo
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curl -s -o /dev/null -u ops:ops-password -X POST "$B/stub/upstream/mode?value=slow"
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sleep 1
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echo "\$ time curl -s $B/actuator/health/externalApi"
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s=$(date +%s.%N)
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curl -s -u ops:ops-password --max-time 60 "$B/actuator/health/externalApi" | python3 -m json.tool
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e=$(date +%s.%N)
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printf 'wall clock: %.2f s\n' "$(echo "$e - $s" | bc)"
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echo
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echo " The read timeout is what bounds this, not the endpoint. Remove setReadTimeout from"
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echo " ExternalApiHealthIndicator and this call blocks for the full 30 seconds, holding a"
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echo " Tomcat worker the whole time."
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curl -s -o /dev/null -u ops:ops-password -X POST "$B/stub/upstream/mode?value=up"
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} > "$OUT" 2>&1
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echo "wrote $OUT"
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