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Add basic service manager to track status of individual parts of the bot
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| package com.tterrag.k9.util; | ||
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| import java.util.ArrayList; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
| import java.util.function.Function; | ||
| import java.util.function.Supplier; | ||
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| import org.reactivestreams.Publisher; | ||
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| import discord4j.core.GatewayDiscordClient; | ||
| import discord4j.core.event.domain.Event; | ||
| import it.unimi.dsi.fastutil.objects.Object2BooleanArrayMap; | ||
| import it.unimi.dsi.fastutil.objects.Object2BooleanMap; | ||
| import lombok.Getter; | ||
| import lombok.Value; | ||
| import lombok.extern.slf4j.Slf4j; | ||
| import reactor.core.publisher.Flux; | ||
| import reactor.core.publisher.Mono; | ||
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| @Slf4j | ||
| public class ServiceManager { | ||
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| private interface ServiceInitializer<R, P extends Publisher<R>> { | ||
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| String getName(); | ||
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| P start(GatewayDiscordClient client); | ||
| } | ||
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| @Value | ||
| private static class BasicInitializer<R, P extends Publisher<R>> implements ServiceInitializer<R, P> { | ||
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| @Getter(onMethod = @__({ @Override })) | ||
| String name; | ||
| Supplier<P> factory; | ||
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| @Override | ||
| public P start(GatewayDiscordClient client) { | ||
| return getFactory().get(); | ||
| } | ||
| } | ||
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| @Value | ||
| private static class EventInitializer<T extends Event, R, P extends Publisher<R>> implements ServiceInitializer<R, P> { | ||
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| @Getter(onMethod = @__({@Override})) | ||
| String name; | ||
| Class<T> eventClass; | ||
| Function<Flux<T>, P> factory; | ||
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| @Override | ||
| public P start(GatewayDiscordClient client) { | ||
| return getFactory().apply(client.on(getEventClass())); | ||
| } | ||
| } | ||
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| private final List<ServiceInitializer<?, ?>> initializers = new ArrayList<>(); | ||
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| private final Set<String> failedServices = new HashSet<>(); | ||
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| public <T extends Event, R, P extends Publisher<R>> ServiceManager eventService(String name, Class<T> eventClass, Function<Flux<T>, P> factory) { | ||
| this.initializers.add(new EventInitializer<>(name, eventClass, factory)); | ||
| return this; | ||
| } | ||
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| public <R, P extends Publisher<R>> ServiceManager service(String name, Supplier<P> factory) { | ||
| this.initializers.add(new BasicInitializer<>(name, factory)); | ||
| return this; | ||
| } | ||
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| public Mono<GatewayDiscordClient> start(GatewayDiscordClient client) { | ||
| return Mono.just(client) | ||
| .flatMap(c -> Mono.when(initializers.stream() | ||
| .map(i -> startService(i, c)) | ||
| .toArray(Publisher[]::new))) | ||
| .thenReturn(client); | ||
| } | ||
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| private <T extends Event, R, P extends Publisher<R>> Publisher<R> startService(ServiceInitializer<R, P> initializer, GatewayDiscordClient client) { | ||
| return Flux.from(initializer.start(client)).onErrorResume(t -> { | ||
| log.error("Service failed! Service name: " + initializer.getName(), t); | ||
| failedServices.add(initializer.getName()); | ||
| return Mono.empty(); | ||
| }); | ||
| } | ||
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| public Object2BooleanMap<String> status() { | ||
| Object2BooleanMap<String> ret = new Object2BooleanArrayMap<>(initializers.size()); | ||
| for (ServiceInitializer<?, ?> initializer : initializers) { | ||
| ret.put(initializer.getName(), !failedServices.contains(initializer.getName())); | ||
| } | ||
| return ret; | ||
| } | ||
| } |