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Implement an exception handler for api client
Signed-off-by: Jorge Aguilera <jorge@edn.es>
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29 changes: 29 additions & 0 deletions
29
plugins/nf-nomad/src/main/nextflow/nomad/config/RetryConfig.groovy
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| package nextflow.nomad.config | ||
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| import groovy.transform.CompileStatic | ||
| import nextflow.util.Duration | ||
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| @CompileStatic | ||
| class RetryConfig { | ||
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| Duration delay = Duration.of('250ms') | ||
| Duration maxDelay = Duration.of('90s') | ||
| int maxAttempts = 10 | ||
| double jitter = 0.25 | ||
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| RetryConfig(){ | ||
| this(Collections.emptyMap()) | ||
| } | ||
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| RetryConfig(Map config){ | ||
| if( config.delay ) | ||
| delay = config.delay as Duration | ||
| if( config.maxDelay ) | ||
| maxDelay = config.maxDelay as Duration | ||
| if( config.maxAttempts ) | ||
| maxAttempts = config.maxAttempts as int | ||
| if( config.jitter ) | ||
| jitter = config.jitter as double | ||
| } | ||
| } |
66 changes: 66 additions & 0 deletions
66
plugins/nf-nomad/src/main/nextflow/nomad/executor/FailsafeExecutor.groovy
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| package nextflow.nomad.executor | ||
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| import dev.failsafe.Failsafe | ||
| import dev.failsafe.RetryPolicy | ||
| import dev.failsafe.event.EventListener | ||
| import dev.failsafe.event.ExecutionAttemptedEvent | ||
| import dev.failsafe.function.CheckedSupplier | ||
| import groovy.transform.CompileStatic | ||
| import groovy.util.logging.Slf4j | ||
| import io.nomadproject.client.ApiException | ||
| import nextflow.nomad.config.RetryConfig | ||
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| import java.time.temporal.ChronoUnit | ||
| import java.util.concurrent.TimeoutException | ||
| import java.util.function.Predicate | ||
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| @Slf4j | ||
| @CompileStatic | ||
| class FailsafeExecutor { | ||
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| private RetryConfig config | ||
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| FailsafeExecutor(RetryConfig config){ | ||
| this.config = config | ||
| } | ||
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| protected <T> RetryPolicy<T> retryPolicy(Predicate<? extends Throwable> cond) { | ||
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| final listener = new EventListener<ExecutionAttemptedEvent<T>>() { | ||
| @Override | ||
| void accept(ExecutionAttemptedEvent<T> event) throws Throwable { | ||
| log.debug("Nomad TooManyRequests response error - attempt: ${event.attemptCount}; reason: ${event.lastFailure.message}") | ||
| } | ||
| } | ||
| return RetryPolicy.<T>builder() | ||
| .handleIf(cond) | ||
| .withBackoff(config.delay.toMillis(), config.maxDelay.toMillis(), ChronoUnit.MILLIS) | ||
| .withMaxAttempts(config.maxAttempts) | ||
| .withJitter(config.jitter) | ||
| .onRetry(listener) | ||
| .build() | ||
| } | ||
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| final private static List<Integer> RETRY_CODES = List.of(408, 429, 500, 502, 503, 504) | ||
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| protected <T> T apply(CheckedSupplier<T> action) { | ||
| // define the retry condition | ||
| final cond = new Predicate<? extends Throwable>() { | ||
| @Override | ||
| boolean test(Throwable t) { | ||
| if( t instanceof ApiException && t.code in RETRY_CODES ) | ||
| return true | ||
| if( t instanceof IOException || t.cause instanceof IOException ) | ||
| return true | ||
| if( t instanceof TimeoutException || t.cause instanceof TimeoutException ) | ||
| return true | ||
| return false | ||
| } | ||
| } | ||
| // create the retry policy object | ||
| final policy = retryPolicy(cond) | ||
| // apply the action with | ||
| return Failsafe.with(policy).get(action) | ||
| } | ||
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| } |
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