com.netflix.client

Interface RetryHandler

All Known Implementing Classes:

DefaultLoadBalancerRetryHandler, RequestSpecificRetryHandler

public interface RetryHandler

A handler that determines if an exception is retriable for load balancer, and if an exception or error response should be treated as circuit related failures so that the load balancer can avoid such server.

Field Summary

Fields

Modifier and Type	Field and Description
static RetryHandler	DEFAULT

Method Summary

Methods

Modifier and Type	Method and Description
int	getMaxRetriesOnNextServer()
int	getMaxRetriesOnSameServer()
boolean	isCircuitTrippingException(java.lang.Throwable e) Test if an exception should be treated as circuit failure.
boolean	isRetriableException(java.lang.Throwable e, boolean sameServer) Test if an exception is retriable for the load balancer

Field Detail

DEFAULT

static final RetryHandler DEFAULT

Method Detail

isRetriableException

boolean isRetriableException(java.lang.Throwable e,
                           boolean sameServer)

Test if an exception is retriable for the load balancer

Parameters:

e - the original exception

sameServer - if true, the method is trying to determine if retry can be done on the same server. Otherwise, it is testing whether retry can be done on a different server

isCircuitTrippingException

boolean isCircuitTrippingException(java.lang.Throwable e)

Test if an exception should be treated as circuit failure. For example, a ConnectException is a circuit failure. This is used to determine whether successive exceptions of such should trip the circuit breaker to a particular host by the load balancer. If false but a server response is absent, load balancer will also close the circuit upon getting such exception.

getMaxRetriesOnSameServer

int getMaxRetriesOnSameServer()

Returns:

Number of maximal retries to be done on one server

getMaxRetriesOnNextServer

int getMaxRetriesOnNextServer()

Returns:

Number of maximal different servers to retry