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SmallRye Fault Tolerance 6.5.0 release announcement #101

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Oct 11, 2024
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SmallRye Fault Tolerance 6.5.0 release announcement #101

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28 changes: 28 additions & 0 deletions _posts/2024-10-11-fault-tolerance-6-5-0.adoc
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:page-layout: post
:page-title: Fault Tolerance 6.5.0
:page-synopsis: SmallRye Fault Tolerance 6.5.0 released!
:page-tags: [announcement, microprofile]
:page-date: 2024-10-11 12:00:00.000 +0100
:page-author: lthon
:smallrye-ft: SmallRye Fault Tolerance
:microprofile-ft: MicroProfile Fault Tolerance

= Fault Tolerance 6.5.0

Today, we announce the https://github.com/smallrye/smallrye-fault-tolerance/releases/tag/6.5.0[release] of {smallrye-ft} 6.5.0.
This release implements {microprofile-ft} 4.1 and contains several new features.

The only new feature of {microprofile-ft} 4.1 is support for OpenTelemetry / MicroProfile Telemetry, specifically for exposing metrics.
Since {smallrye-ft} has already included support for MicroProfile Metrics and Micrometer, adding a third implementation was a no-brainer.

In addition to that, {smallrye-ft} 6.5.0 resolves fallback methods (`@Fallback.fallbackMethod()`) and before-retry methods (`@BeforeRetry.methodName()`) statically.
That is, instead of resolving the methods when the fault tolerance operation is being constructed, the methods are resolved during deployment.
This makes no difference in regular environments like WildFly, but in Quarkus, where deployment happens at build time, this is a significant change.
It allows proper native image compilation, and it is also a breaking change on the configuration front.
The configuration of fallback methods and before-retry methods is now build-time only, and cannot be changed at runtime.

Finally, in this version, the `FaultTolerance.cast()` and `castAsync()` methods were added.
These methods return the same instance of `FaultTolerance`, but casted to guard a different type.
This is often safe, but cannot happen when fallback is defined; in that case, these methods throw an exception.

As usual, if you have any ideas for improvements, please https://github.com/smallrye/smallrye-fault-tolerance/issues[file an issue]!