Ankur Mhatre
958b401f0f
Adds spring-boot-startup-time/, the companion project for BLOG-618: a runnable Spring Boot 4.1.1 application on JDK 25 that installs BufferingApplicationStartup and FlightRecorderApplicationStartup behind a system property, and a /diag/startup endpoint that computes step self time -- the number /actuator/startup does not give you and the one that names the actual culprits. Captured under docs/output/: the step tree sorted both ways, the same startup as JFR events, a +5000-class experiment putting 0.11 ms per scanned class on the classpath scan tax, the silent truncation a 2048-step buffer performs, and JDK 25 AOT cache timings (6.93 s to 4.82 s). Post body and metadata live in post/. Moves the existing Actuator project into actuator-in-production/ so the repository holds one directory per article; the root README is now an index.
36 lines
1.0 KiB
Plaintext
36 lines
1.0 KiB
Plaintext
### Spring Boot Actuator, starter added, ZERO management.* configuration
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$ curl -s -u ops:ops-password http://localhost:8080/actuator
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{
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"_links": {
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"self": {
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"href": "http://localhost:8080/actuator",
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"templated": false
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},
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"health": {
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"href": "http://localhost:8080/actuator/health",
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"templated": false
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},
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"health-path": {
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"href": "http://localhost:8080/actuator/health/{*path}",
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"templated": true
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}
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}
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}
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$ curl -s -o /dev/null -w '%{http_code}' -u ops:ops-password http://localhost:8080/actuator/env
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404
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404 = discovered but NOT exposed over HTTP. Exposure and existence are different things.
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$ curl -s -u ops:ops-password http://localhost:8080/actuator/health
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{
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"groups": [
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"liveness",
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"readiness"
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],
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"status": "DOWN"
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}
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Only 'health' is web-exposed by default. show-details defaults to 'never', so even an
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authenticated caller sees a bare status until you say otherwise.
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