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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}.
*
* <p>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<String, ServerServiceDefinition> services
= new ConcurrentHashMap<String, ServerServiceDefinition>();
/**
* 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<ServerServiceDefinition> getServices() {
return Collections.unmodifiableList(new ArrayList<ServerServiceDefinition>(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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