migrates weighted loadbalance strategy to user new RequestInterceptors for Stats tracking#946
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OlegDokuka merged 2 commits intomasterfrom Oct 22, 2020
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Signed-off-by: Oleh Dokuka <shadowgun@i.ua>
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Looks great overall.
One consequence is that WeightedLoadBalanceStrategy can no longer be instantiated directly for the purpose of being used with LoadbalanceRSocketClient. I think WeightedLoadbalanceStrategy should be an InitializingLoadbalanceStrategy but the management of that Map as well as the logic to initialize the connector could be in an inner class (rather than a sub-class) which implements Function<RSocket, StatsRequestInterceptor>. So then if WeightedLoadbalanceStrategy is created without an externally provided Function it falls back on an instance of that inner class.
rsocket-core/src/main/java/io/rsocket/loadbalance/StatsRequestInterceptor.java
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rsocket-core/src/main/java/io/rsocket/loadbalance/LoadbalanceRSocketClient.java
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Signed-off-by: Oleh Dokuka <shadowgun@i.ua>
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This PR refactors current weighted rsocket to another mechanism which makes Stats to be hidden from the outside world and make it accessible only for WeighetedLoadbalanceStrategy.
This PR introduces StatsRequestInterceptor, which is a public class, hence can be used not only for Client-side but as well as for the server one (e.g. broker case).
The WeightedLoadbalanceStrategy, gets a new constructor API which lets one using selected RSocket to extract associated StatsRequestInterceptor and then calculate the weight.