org.wildfly.swarm.microprofile.faulttolerance.deployment

Class HystrixCommandInterceptor

java.lang.Object

org.wildfly.swarm.microprofile.faulttolerance.deployment.HystrixCommandInterceptor

@HystrixCommandBinding
public class HystrixCommandInterceptor
extends Object

Implementation notes:

If SynchronousCircuitBreaker is used it is not possible to track the execution inside a Hystrix command because a TimeoutException should be always counted as a failure, even if the command execution completes normally.

We never use HystrixCommand#queue() for async execution. Mostly to workaround various problems of Asynchronous Retry combination. Instead, we create a composite command and inside its run() method we execute commands synchronously.

Author:

Antoine Sabot-Durand, Martin Kouba

Field Summary

Fields

Modifier and Type	Field and Description
static String	SYNC_CIRCUIT_BREAKER_KEY This config property key can be used to disable synchronous circuit breaker functionality.

Constructor Summary

Constructors

Constructor and Description
HystrixCommandInterceptor(Boolean nonFallBackEnable, Config config, <any> fraction, BeanManager beanManager, RequestContext requestContext)

Method Summary

Modifier and Type	Method and Description
Object	interceptCommand(InvocationContext ic)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SYNC_CIRCUIT_BREAKER_KEY

public static final String SYNC_CIRCUIT_BREAKER_KEY

This config property key can be used to 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. See also Hystrix configuration

In general, application developers are encouraged to disable this feature on high-volume circuits and in production environments.

See Also:

Constant Field Values

Constructor Detail

HystrixCommandInterceptor

public HystrixCommandInterceptor(Boolean nonFallBackEnable,
                                 Config config,
                                 <any> fraction,
                                 BeanManager beanManager,
                                 RequestContext requestContext)

Method Detail

interceptCommand

public Object interceptCommand(InvocationContext ic)
                        throws Exception

Throws:

Exception