Package org.apache.druid.rpc

Class StandardRetryPolicy

java.lang.Object

org.apache.druid.rpc.StandardRetryPolicy

All Implemented Interfaces:

ServiceRetryPolicy

public class StandardRetryPolicy
extends Object
implements ServiceRetryPolicy

Retry policy configurable with a maximum number of attempts and min/max wait time. The policy retries on IOExceptions and ChannelExceptions, and on HTTP 500, 502, 503, and 504. Other exceptions and other HTTP status codes are considered nonretryable errors.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	StandardRetryPolicy.Builder

Field Summary

Fields inherited from interface org.apache.druid.rpc.ServiceRetryPolicy

UNLIMITED

Method Summary

Modifier and Type	Method	Description
static StandardRetryPolicy	aboutAnHour()	Retry policy that uses up to about an hour of total wait time.
static StandardRetryPolicy.Builder	builder()
long	maxAttempts()	Returns the maximum number of desired attempts, or ServiceRetryPolicy.UNLIMITED if unlimited.
long	maxWaitMillis()	Returns the maximum wait time between retries.
long	minWaitMillis()	Returns the minimum wait time between retries.
static StandardRetryPolicy	noRetries()	Retry policy that never retries.
boolean	retryHttpResponse(org.jboss.netty.handler.codec.http.HttpResponse response)	Returns whether the given HTTP response can be retried.
boolean	retryLoggable()	Returns whether to log the cause of failure before retrying
boolean	retryNotAvailable()	Returns whether service-not-available, i.e.
boolean	retryThrowable(Throwable t)	Returns whether the given exception can be retried.
static StandardRetryPolicy	unlimited()	Standard unlimited retry policy.
static StandardRetryPolicy	unlimitedWithoutRetryLogging()	Standard unlimited retry policy along with muted the logging for the retries.

Methods inherited from class java.lang.Object

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

Method Details

builder

public static StandardRetryPolicy.Builder builder()

unlimited

public static StandardRetryPolicy unlimited()

Standard unlimited retry policy. Never stops retrying as long as errors remain retryable. See ServiceClient documentation for details on what errors are retryable.

unlimitedWithoutRetryLogging

public static StandardRetryPolicy unlimitedWithoutRetryLogging()

Standard unlimited retry policy along with muted the logging for the retries.

aboutAnHour

public static StandardRetryPolicy aboutAnHour()

Retry policy that uses up to about an hour of total wait time. Note that this is just the total waiting time between attempts. It does not include the time that each attempt takes to execute.

noRetries

public static StandardRetryPolicy noRetries()

Retry policy that never retries.

maxAttempts

public long maxAttempts()

Description copied from interface: ServiceRetryPolicy

Returns the maximum number of desired attempts, or ServiceRetryPolicy.UNLIMITED if unlimited. A value of 1 means no retries. Zero is invalid.

Specified by:

maxAttempts in interface ServiceRetryPolicy

minWaitMillis

public long minWaitMillis()

Description copied from interface: ServiceRetryPolicy

Returns the minimum wait time between retries.

Specified by:

minWaitMillis in interface ServiceRetryPolicy

maxWaitMillis

public long maxWaitMillis()

Description copied from interface: ServiceRetryPolicy

Returns the maximum wait time between retries.

Specified by:

maxWaitMillis in interface ServiceRetryPolicy

retryHttpResponse

public boolean retryHttpResponse(org.jboss.netty.handler.codec.http.HttpResponse response)

Description copied from interface: ServiceRetryPolicy

Returns whether the given HTTP response can be retried. The response will have a non-2xx error code.

Specified by:

retryHttpResponse in interface ServiceRetryPolicy

retryThrowable

public boolean retryThrowable(Throwable t)

Description copied from interface: ServiceRetryPolicy

Returns whether the given exception can be retried.

Specified by:

retryThrowable in interface ServiceRetryPolicy

retryLoggable

public boolean retryLoggable()

Description copied from interface: ServiceRetryPolicy

Returns whether to log the cause of failure before retrying

Specified by:

retryLoggable in interface ServiceRetryPolicy

retryNotAvailable

public boolean retryNotAvailable()

Description copied from interface: ServiceRetryPolicy

Returns whether service-not-available, i.e. empty ServiceLocations.getLocations(), can be retried.

Specified by:

retryNotAvailable in interface ServiceRetryPolicy