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/*
 * Copyright 2014 The gRPC Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.grpc.util;

import io.grpc.BindableService;
import io.grpc.ExperimentalApi;
import io.grpc.HandlerRegistry;
import io.grpc.MethodDescriptor;
import io.grpc.ServerMethodDefinition;
import io.grpc.ServerServiceDefinition;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import javax.annotation.Nullable;
import javax.annotation.concurrent.ThreadSafe;

/**
 * Default implementation of {@link MutableHandlerRegistry}.
 *
 * 

Uses {@link ConcurrentHashMap} to avoid service registration excessively * blocking method lookup. */ @ThreadSafe @ExperimentalApi("https://github.com/grpc/grpc-java/issues/933") public final class MutableHandlerRegistry extends HandlerRegistry { private final ConcurrentMap services = new ConcurrentHashMap<>(); /** * Registers a service. * * @return the previously registered service with the same service descriptor name if exists, * otherwise {@code null}. */ @Nullable public ServerServiceDefinition addService(ServerServiceDefinition service) { return services.put(service.getServiceDescriptor().getName(), service); } /** * Registers a service. * * @return the previously registered service with the same service descriptor name if exists, * otherwise {@code null}. */ @Nullable public ServerServiceDefinition addService(BindableService bindableService) { return addService(bindableService.bindService()); } /** * Removes a registered service * * @return true if the service was found to be removed. */ public boolean removeService(ServerServiceDefinition service) { return services.remove(service.getServiceDescriptor().getName(), service); } /** * Note: This does not necessarily return a consistent view of the map. */ @Override @ExperimentalApi("https://github.com/grpc/grpc-java/issues/2222") public List getServices() { return Collections.unmodifiableList(new ArrayList<>(services.values())); } /** * Note: This does not actually honor the authority provided. It will, eventually in the future. */ @Override @Nullable public ServerMethodDefinition lookupMethod(String methodName, @Nullable String authority) { String serviceName = MethodDescriptor.extractFullServiceName(methodName); if (serviceName == null) { return null; } ServerServiceDefinition service = services.get(serviceName); if (service == null) { return null; } return service.getMethod(methodName); } }





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