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Add warning about export of metrics being switched off 

E.g. just adding Dropwizard to the classpath switches it off which
might be surprising. We need a @ExportMetricReader to do the export.
This commit is contained in:
Dave Syer 2015-10-02 14:51:50 +01:00
parent 57d9b58f79
commit e232e7c837
1 changed files with 4 additions and 1 deletions
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spring-boot-docs/src/main/asciidoc/production-ready-features.adoc
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@ -1061,7 +1061,6 @@ hooked up to an `Exporter` and fed metric updates every 5 seconds (configured vi
`spring.metrics.export.delay-millis`). In addition, any `MetricReader` that you define and
mark as `@ExportMetricReader` will have its values exported by the default exporter.
The default exporter is a `MetricCopyExporter` which tries to optimize itself by not
copying values that haven't changed since it was last called (the optimization can be
switched off using a flag `spring.metrics.export.send-latest`). Note also that the
@ -1074,6 +1073,10 @@ values for specific `MetricWriters` can be set as
`spring.metrics.export.triggers.<name>.*` where `<name>` is a bean name (or pattern for
matching bean names).
WARNING: The automatic export of metrics is disabled if you switch off the
default `MetricRepository` (e.g. by using Dropwizard metrics). You can get back the
same functionality be declaring a bean of your own of type `MetricReader` and
declaring it to be `@ExportMetricReader`.
[[production-ready-metric-writers-export-to-redis]]