com.netflix.client

Class DefaultLoadBalancerRetryHandler

java.lang.Object

com.netflix.client.DefaultLoadBalancerRetryHandler

All Implemented Interfaces:

RetryHandler

public class DefaultLoadBalancerRetryHandler
extends java.lang.Object
implements RetryHandler

A default RetryHandler. The implementation is limited to known exceptions in java.net. Specific client implementation should provide its own RetryHandler

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	retryEnabled
protected int	retryNextServer
protected int	retrySameServer

Fields inherited from interface com.netflix.client.RetryHandler

DEFAULT

Constructor Summary

Constructors

Constructor and Description
DefaultLoadBalancerRetryHandler()
DefaultLoadBalancerRetryHandler(IClientConfig clientConfig)
DefaultLoadBalancerRetryHandler(int retrySameServer, int retryNextServer, boolean retryEnabled)

Method Summary

Modifier and Type	Method and Description
protected java.util.List<java.lang.Class<? extends java.lang.Throwable>>	getCircuitRelatedExceptions()
int	getMaxRetriesOnNextServer()
int	getMaxRetriesOnSameServer()
protected java.util.List<java.lang.Class<? extends java.lang.Throwable>>	getRetriableExceptions()
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

Methods inherited from class java.lang.Object

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

Field Detail

retrySameServer

protected final int retrySameServer

retryNextServer

protected final int retryNextServer

retryEnabled

protected final boolean retryEnabled

Constructor Detail

DefaultLoadBalancerRetryHandler

public DefaultLoadBalancerRetryHandler()

DefaultLoadBalancerRetryHandler

public DefaultLoadBalancerRetryHandler(int retrySameServer,
                                       int retryNextServer,
                                       boolean retryEnabled)

DefaultLoadBalancerRetryHandler

public DefaultLoadBalancerRetryHandler(IClientConfig clientConfig)

Method Detail

isRetriableException

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

Description copied from interface: RetryHandler

Test if an exception is retriable for the load balancer

Specified by:

isRetriableException in interface RetryHandler

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

public boolean isCircuitTrippingException(java.lang.Throwable e)

Description copied from interface: RetryHandler

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.

Specified by:

isCircuitTrippingException in interface RetryHandler

Returns:

true if SocketException or SocketTimeoutException is a cause in the Throwable.

getMaxRetriesOnSameServer

public int getMaxRetriesOnSameServer()

Specified by:

getMaxRetriesOnSameServer in interface RetryHandler

Returns:

Number of maximal retries to be done on one server

getMaxRetriesOnNextServer

public int getMaxRetriesOnNextServer()

Specified by:

getMaxRetriesOnNextServer in interface RetryHandler

Returns:

Number of maximal different servers to retry

getRetriableExceptions

protected java.util.List<java.lang.Class<? extends java.lang.Throwable>> getRetriableExceptions()

getCircuitRelatedExceptions

protected java.util.List<java.lang.Class<? extends java.lang.Throwable>> getCircuitRelatedExceptions()