541fe86fe0
Motivation: As discussed in #4529, NameResolver design shouldn't be resolving SocketAddresses (or String name + port) and return InetSocketAddresses. It should resolve String names and return InetAddresses. This SocketAddress to InetSocketAddresses resolution is actually a different concern, used by Bootstrap. Modifications: Extract SocketAddress to InetSocketAddresses resolution concern to a new class hierarchy named AddressResolver. These AddressResolvers delegate to NameResolvers. Result: Better separation of concerns. Note that new AddressResolvers generate a bit more allocations because of the intermediate Promise and List<InetAddress>.
91 lines
3.1 KiB
Java
91 lines
3.1 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.resolver;
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import io.netty.util.concurrent.Future;
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import io.netty.util.concurrent.Promise;
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import java.io.Closeable;
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import java.net.SocketAddress;
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import java.nio.channels.UnsupportedAddressTypeException;
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import java.util.List;
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/**
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* Resolves a possibility unresolved {@link {@link SocketAddress}}.
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*/
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public interface AddressResolver<T extends SocketAddress> extends Closeable {
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/**
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* Returns {@code true} if and only if the specified address is supported by this resolved.
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*/
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boolean isSupported(SocketAddress address);
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/**
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* Returns {@code true} if and only if the specified address has been resolved.
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*
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* @throws UnsupportedAddressTypeException if the specified address is not supported by this resolver
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*/
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boolean isResolved(SocketAddress address);
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/**
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* Resolves the specified address. If the specified address is resolved already, this method does nothing
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* but returning the original address.
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*
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* @param address the address to resolve
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*
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* @return the {@link SocketAddress} as the result of the resolution
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*/
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Future<T> resolve(SocketAddress address);
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/**
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* Resolves the specified address. If the specified address is resolved already, this method does nothing
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* but returning the original address.
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*
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* @param address the address to resolve
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* @param promise the {@link Promise} which will be fulfilled when the name resolution is finished
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*
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* @return the {@link SocketAddress} as the result of the resolution
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*/
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Future<T> resolve(SocketAddress address, Promise<T> promise);
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/**
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* Resolves the specified address. If the specified address is resolved already, this method does nothing
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* but returning the original address.
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*
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* @param address the address to resolve
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*
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* @return the list of the {@link SocketAddress}es as the result of the resolution
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*/
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Future<List<T>> resolveAll(SocketAddress address);
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/**
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* Resolves the specified address. If the specified address is resolved already, this method does nothing
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* but returning the original address.
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*
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* @param address the address to resolve
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* @param promise the {@link Promise} which will be fulfilled when the name resolution is finished
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*
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* @return the list of the {@link SocketAddress}es as the result of the resolution
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*/
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Future<List<T>> resolveAll(SocketAddress address, Promise<List<T>> promise);
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/**
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* Closes all the resources allocated and used by this resolver.
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*/
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@Override
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void close();
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}
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