37 lines
1.0 KiB
Java
37 lines
1.0 KiB
Java
package com.moparisthebest.dns.resolve;
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import com.moparisthebest.dns.dto.Packet;
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import java.util.Collection;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.Executor;
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import java.util.concurrent.ThreadLocalRandom;
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public class RandomUpstreamResolver implements MultiResolver {
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private final Resolver[] delegates;
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public RandomUpstreamResolver(final Resolver... delegates) {
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this.delegates = delegates;
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}
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public RandomUpstreamResolver(final Collection<Resolver> delegates) {
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this.delegates = delegates.toArray(new Resolver[0]);
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}
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public Resolver random() {
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return delegates[ThreadLocalRandom.current().nextInt(delegates.length)];
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}
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@Override
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public CompletableFuture<Packet> resolveAsync(final Packet request, final Executor executor) {
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return random().resolveAsync(request, executor);
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}
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@Override
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public Packet resolve(final Packet request) throws Exception {
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return random().resolve(request);
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}
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}
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