⁣逼‌多​多⁣ v3.6.2 - NameResolverRegistry.java 源代码

package io.grpc;

import com.google.common.collect.k;
import io.grpc.NameResolver;
import io.grpc.ServiceProviders;
import io.grpc.internal.DnsNameResolverProvider;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import q.l;

@ExperimentalApi("https://github.com/grpc/grpc-java/issues/4159")
public final class NameResolverRegistry {
    private static final String UNKNOWN_SCHEME = "unknown";
    private static NameResolverRegistry instance;
    private static final Logger logger = Logger.getLogger(NameResolverRegistry.class.getName());
    private final NameResolver.Factory factory = new NameResolverFactory();
    private String defaultScheme = UNKNOWN_SCHEME;
    private final LinkedHashSet<NameResolverProvider> allProviders = new LinkedHashSet<>();
    private k effectiveProviders = k.i();

    private final class NameResolverFactory extends NameResolver.Factory {
        private NameResolverFactory() {
        }

        @Override
        public String getDefaultScheme() {
            return NameResolverRegistry.this.getDefaultScheme();
        }

        @Override
        public NameResolver newNameResolver(URI uri, NameResolver.Args args) {
            NameResolverProvider providerForScheme = NameResolverRegistry.this.getProviderForScheme(uri.getScheme());
            if (providerForScheme == null) {
                return null;
            }
            return providerForScheme.newNameResolver(uri, args);
        }
    }

    private static final class NameResolverPriorityAccessor implements ServiceProviders.PriorityAccessor<NameResolverProvider> {
        private NameResolverPriorityAccessor() {
        }

        @Override
        public int getPriority(NameResolverProvider nameResolverProvider) {
            return nameResolverProvider.priority();
        }

        @Override
        public boolean isAvailable(NameResolverProvider nameResolverProvider) {
            return nameResolverProvider.isAvailable();
        }
    }

    private synchronized void addProvider(NameResolverProvider nameResolverProvider) {
        l.e(nameResolverProvider.isAvailable(), "isAvailable() returned false");
        this.allProviders.add(nameResolverProvider);
    }

    public static synchronized NameResolverRegistry getDefaultRegistry() {
        NameResolverRegistry nameResolverRegistry;
        synchronized (NameResolverRegistry.class) {
            try {
                if (instance == null) {
                    List<NameResolverProvider> loadAll = ServiceProviders.loadAll(NameResolverProvider.class, getHardCodedClasses(), NameResolverProvider.class.getClassLoader(), new NameResolverPriorityAccessor());
                    if (loadAll.isEmpty()) {
                        logger.warning("No NameResolverProviders found via ServiceLoader, including for DNS. This is probably due to a broken build. If using ProGuard, check your configuration");
                    }
                    instance = new NameResolverRegistry();
                    for (NameResolverProvider nameResolverProvider : loadAll) {
                        logger.fine("Service loader found " + nameResolverProvider);
                        instance.addProvider(nameResolverProvider);
                    }
                    instance.refreshProviders();
                }
                nameResolverRegistry = instance;
            } catch (Throwable th) {
                throw th;
            }
        }
        return nameResolverRegistry;
    }

    static List<Class<?>> getHardCodedClasses() {
        ArrayList arrayList = new ArrayList();
        try {
            int i = DnsNameResolverProvider.a;
            arrayList.add(DnsNameResolverProvider.class);
        } catch (ClassNotFoundException e) {
            logger.log(Level.FINE, "Unable to find DNS NameResolver", (Throwable) e);
        }
        return Collections.unmodifiableList(arrayList);
    }

    private synchronized void refreshProviders() {
        throw new UnsupportedOperationException("Method not decompiled: io.grpc.NameResolverRegistry.refreshProviders():void");
    }

    public NameResolver.Factory asFactory() {
        return this.factory;
    }

    public synchronized void deregister(NameResolverProvider nameResolverProvider) {
        this.allProviders.remove(nameResolverProvider);
        refreshProviders();
    }

    public synchronized String getDefaultScheme() {
        return this.defaultScheme;
    }

    public NameResolverProvider getProviderForScheme(String str) {
        if (str == null) {
            return null;
        }
        return providers().get(str.toLowerCase(Locale.US));
    }

    synchronized Map<String, NameResolverProvider> providers() {
        return this.effectiveProviders;
    }

    public synchronized void register(NameResolverProvider nameResolverProvider) {
        addProvider(nameResolverProvider);
        refreshProviders();
    }
}