forked from grpc/grpc-java
/
UdsNameResolver.java
66 lines (56 loc) · 2.04 KB
/
UdsNameResolver.java
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/*
* Copyright 2022 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.netty;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.base.Preconditions;
import io.grpc.EquivalentAddressGroup;
import io.grpc.NameResolver;
import io.netty.channel.unix.DomainSocketAddress;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
final class UdsNameResolver extends NameResolver {
private NameResolver.Listener2 listener;
private final String authority;
UdsNameResolver(String authority, String targetPath) {
checkArgument(authority == null, "non-null authority not supported");
this.authority = targetPath;
}
@Override
public String getServiceAuthority() {
return this.authority;
}
@Override
public void start(Listener2 listener) {
Preconditions.checkState(this.listener == null, "already started");
this.listener = checkNotNull(listener, "listener");
resolve();
}
@Override
public void refresh() {
resolve();
}
private void resolve() {
ResolutionResult.Builder resolutionResultBuilder = ResolutionResult.newBuilder();
List<EquivalentAddressGroup> servers = new ArrayList<>(1);
servers.add(new EquivalentAddressGroup(new DomainSocketAddress(authority)));
resolutionResultBuilder.setAddresses(Collections.unmodifiableList(servers));
listener.onResult(resolutionResultBuilder.build());
}
@Override
public void shutdown() {}
}