org.wildfly.swarm.microprofile.faulttolerance.MicroProfileFaultToleranceFraction Maven / Gradle / Ivy
/*
* Copyright 2017 Red Hat, Inc, and individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.wildfly.swarm.microprofile.faulttolerance;
import org.wildfly.swarm.config.runtime.AttributeDocumentation;
import org.wildfly.swarm.spi.api.Defaultable;
import org.wildfly.swarm.spi.api.Fraction;
import org.wildfly.swarm.spi.api.Module;
import org.wildfly.swarm.spi.api.annotations.Configurable;
import org.wildfly.swarm.spi.api.annotations.DeploymentModule;
import org.wildfly.swarm.spi.api.annotations.DeploymentModule.MetaInfDisposition;
import io.smallrye.faulttolerance.HystrixCommandInterceptor;
/**
* @author Antoine Sabot-Durand
*/
@DeploymentModule(name = "io.smallrye.faulttolerance", metaInf = MetaInfDisposition.IMPORT, export = true, services = Module.ServiceHandling.IMPORT)
public class MicroProfileFaultToleranceFraction implements Fraction {
private static final String SYNC_CIRCUIT_BREAKER_KEY = "swarm.microprofile.fault-tolerance.synchronous-circuit-breaker";
public MicroProfileFaultToleranceFraction() {
// IMPL NOTE: this is not very nice but works because org.wildfly.swarm.container.config.PropertiesManipulator.SystemPropertiesManipulator (used by
// default) re-sets all properties found when Thorntail starts and the value is picked up later by the default MP config source
String synchronousCircuitBreaker = System.getProperty(SYNC_CIRCUIT_BREAKER_KEY);
if (synchronousCircuitBreaker != null) {
// Thorntail settings take precedence
System.setProperty(HystrixCommandInterceptor.SYNC_CIRCUIT_BREAKER_KEY, synchronousCircuitBreaker);
}
}
public boolean isSynchronousCircuitBreakerEnabled() {
return synchronousCircuitBreaker.get();
}
// Keep the attribute for docs generation
@AttributeDocumentation("Enable/disable synchronous circuit breaker functionality. If disabled, `CircuitBreaker#successThreshold()` of value greater than 1 is not supported. Moreover, circuit breaker does not necessarily transition from `CLOSED` to `OPEN` immediately when a fault tolerance operation completes. However, applications are encouraged to disable this feature on high-volume circuits.")
@Configurable(SYNC_CIRCUIT_BREAKER_KEY)
private Defaultable synchronousCircuitBreaker = Defaultable.bool(true);
}