io.smallrye.faulttolerance.DefaultFallbackHandlerProvider Maven / Gradle / Ivy
package io.smallrye.faulttolerance;
import jakarta.enterprise.context.Dependent;
import jakarta.enterprise.inject.spi.BeanManager;
import jakarta.enterprise.inject.spi.Unmanaged;
import jakarta.inject.Inject;
import org.eclipse.microprofile.faulttolerance.ExecutionContext;
import org.eclipse.microprofile.faulttolerance.FallbackHandler;
import io.smallrye.faulttolerance.config.FaultToleranceOperation;
/**
* Default implementation of {@link FallbackHandlerProvider}.
*
* @author Martin Kouba
*/
@Dependent
public class DefaultFallbackHandlerProvider implements FallbackHandlerProvider {
@Inject
BeanManager beanManager;
@Override
public FallbackHandler get(FaultToleranceOperation operation) {
if (operation.hasFallback()) {
//noinspection Convert2Lambda
return new FallbackHandler() {
@Override
public T handle(ExecutionContext context) {
Unmanaged> unmanaged = new Unmanaged<>(beanManager,
(Class>) operation.getFallback().value());
Unmanaged.UnmanagedInstance> unmanagedInstance = unmanaged.newInstance();
FallbackHandler handler = unmanagedInstance.produce().inject().postConstruct().get();
try {
return handler.handle(context);
} finally {
// The instance exists to service a single invocation only
unmanagedInstance.preDestroy().dispose();
}
}
};
}
return null;
}
}