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Document Fault Tolerance configuration #12298

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Sep 23, 2020
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Document Fault Tolerance configuration #12298

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33 changes: 33 additions & 0 deletions docs/src/main/asciidoc/microprofile-fault-tolerance.adoc
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Expand Up @@ -447,6 +447,39 @@ To test this out, do the following:
5. Give it 5 seconds during which circuit breaker should close and you should be able to make two successful requests
again.

== Runtime configuration

You can override the annotations parameters at runtime inside your `application.properties` file.

If we take the retry example that we already saw:

[source,java]
----
package org.acme;

import org.eclipse.microprofile.faulttolerance.Retry;
...

public class CoffeeResource {
...
@GET
@Retry(maxRetries = 4)
public List<Coffee> coffees() {
...
}
...
}
----

We can override the `maxRetries` parameter with 6 retries instead of 4 by the following configuration item:
[source,properties]
----
org.acme.CoffeeResource/coffees/Retry/maxRetries=6
----

NOTE: The format is `fully-qualified-class-name/method-name/annotation-name/property-name=value`.
You can also configure a property for all the annotation via `annotation-name/property-name=value`.

== Conclusion

MicroProfile Fault Tolerance allows to improve resiliency of your application, without having an impact on the complexity
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