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Elasticsearch subproject :server
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.common.transport;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import static java.util.Collections.unmodifiableMap;
/**
* A global registry of all supported types of {@link TransportAddress}s. This registry is not open for modification by plugins.
*/
public abstract class TransportAddressSerializers {
private static final Map> ADDRESS_REGISTRY;
static {
Map> registry = new HashMap<>();
addAddressType(registry, InetSocketTransportAddress.TYPE_ID, InetSocketTransportAddress::new);
addAddressType(registry, LocalTransportAddress.TYPE_ID, LocalTransportAddress::new);
ADDRESS_REGISTRY = unmodifiableMap(registry);
}
private static void addAddressType(Map> registry,
short uniqueAddressTypeId, CheckedBiFunction address) {
if (registry.containsKey(uniqueAddressTypeId)) {
throw new IllegalStateException("Address [" + uniqueAddressTypeId + "] already bound");
}
registry.put(uniqueAddressTypeId, address);
}
public static TransportAddress addressFromStream(StreamInput input) throws IOException {
return addressFromStream(input, null);
}
public static TransportAddress addressFromStream(StreamInput input, String hostString) throws IOException {
// TODO why don't we just use named writeables here?
short addressUniqueId = input.readShort();
CheckedBiFunction addressType = ADDRESS_REGISTRY.get(addressUniqueId);
if (addressType == null) {
throw new IOException("No transport address mapped to [" + addressUniqueId + "]");
}
return addressType.apply(input, hostString);
}
public static void addressToStream(StreamOutput out, TransportAddress address) throws IOException {
out.writeShort(address.uniqueAddressTypeId());
address.writeTo(out);
}
/** A BiFuntion that can throw an IOException */
@FunctionalInterface
interface CheckedBiFunction {
/**
* Applies this function to the given arguments.
*
* @param t the first function argument
* @param u the second function argument
* @return the function result
*/
R apply(T t, U u) throws IOException;
}
}