Package com.nimbusds.jose.jwk.source

Class RateLimitedJWKSetSource<C extends SecurityContext>

java.lang.Object

com.nimbusds.jose.jwk.source.JWKSetSourceWrapper<C>

com.nimbusds.jose.jwk.source.RateLimitedJWKSetSource<C>

All Implemented Interfaces:

JWKSetSource<C>, Closeable, AutoCloseable

@ThreadSafe
public class RateLimitedJWKSetSource<C extends SecurityContext>
extends JWKSetSourceWrapper<C>

JWKSetSource that limits the number of requests in a time period. Intended to guard against frequent, potentially costly, downstream calls.

Two invocations per time period are allowed, so that, under normal operation, there is always one invocation left in case the keys are rotated and this results in triggering a refresh of the JWK set. The other request is (sometimes) consumed by background refreshes.

Version:

2022-11-22

Author:

Thomas Rørvik Skjølberg, Vladimir Dzhuvinov

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	RateLimitedJWKSetSource.RateLimitedEvent<C extends SecurityContext>	Rate limited event.

Constructor Summary

Constructors

Constructor	Description
RateLimitedJWKSetSource(JWKSetSource<C> source, long minTimeInterval, EventListener<RateLimitedJWKSetSource<C>,C> eventListener)	Creates a new JWK set source that limits the number of requests.

Method Summary

Modifier and Type	Method	Description
JWKSet	getJWKSet(JWKSetCacheRefreshEvaluator refreshEvaluator, long currentTime, C context)	Gets the JWK set.
long	getMinTimeInterval()	Returns the minimum allowed time interval between two JWK set retrievals.

Methods inherited from class com.nimbusds.jose.jwk.source.JWKSetSourceWrapper

close, getSource

Methods inherited from class java.lang.Object

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

Constructor Detail

RateLimitedJWKSetSource

public RateLimitedJWKSetSource(JWKSetSource<C> source,
                               long minTimeInterval,
                               EventListener<RateLimitedJWKSetSource<C>,C> eventListener)

Creates a new JWK set source that limits the number of requests.

Parameters:

source - The JWK set source to decorate. Must not be null.

minTimeInterval - The minimum allowed time interval between two JWK set retrievals, in milliseconds.

eventListener - The event listener, null if not specified.

Method Detail

getJWKSet

public JWKSet getJWKSet(JWKSetCacheRefreshEvaluator refreshEvaluator,
                        long currentTime,
                        C context)
                 throws KeySourceException

Description copied from interface: JWKSetSource

Gets the JWK set.

Parameters:

refreshEvaluator - Controls whether refresh of the JWK set cache (if utilised by the source) is required.

currentTime - The current time, in milliseconds since the Unix epoch.

context - Optional context, null if not required.

Returns:

The JWK set.

Throws:

KeySourceException - If JWK set retrieval failed.

getMinTimeInterval

public long getMinTimeInterval()

Returns the minimum allowed time interval between two JWK set retrievals.

Returns:

The minimum allowed time interval between two JWK set retrievals, in milliseconds.