forked from grpc/grpc-java
/
FakeNameResolverProvider.java
94 lines (79 loc) · 2.51 KB
/
FakeNameResolverProvider.java
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/*
* Copyright 2021 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.internal.testing;
import com.google.common.collect.ImmutableList;
import io.grpc.EquivalentAddressGroup;
import io.grpc.NameResolver;
import io.grpc.NameResolverProvider;
import io.grpc.Status;
import java.net.SocketAddress;
import java.net.URI;
/** A name resolver to always resolve the given URI into the given address. */
public final class FakeNameResolverProvider extends NameResolverProvider {
private final URI targetUri;
private final SocketAddress address;
public FakeNameResolverProvider(String targetUri, SocketAddress address) {
this.targetUri = URI.create(targetUri);
this.address = address;
}
@Override
public NameResolver newNameResolver(URI targetUri, NameResolver.Args args) {
if (targetUri.equals(this.targetUri)) {
return new FakeNameResolver(address);
}
return null;
}
@Override
protected boolean isAvailable() {
return true;
}
@Override
protected int priority() {
return 5; // Default
}
@Override
public String getDefaultScheme() {
return targetUri.getScheme();
}
/** A single name resolver. */
private static final class FakeNameResolver extends NameResolver {
private static final String AUTHORITY = "fake-authority";
private final SocketAddress address;
private volatile boolean shutdown;
private FakeNameResolver(SocketAddress address) {
this.address = address;
}
@Override
public void start(Listener2 listener) {
if (shutdown) {
listener.onError(Status.FAILED_PRECONDITION.withDescription("Resolver is shutdown"));
} else {
listener.onResult(
ResolutionResult.newBuilder()
.setAddresses(ImmutableList.of(new EquivalentAddressGroup(address)))
.build());
}
}
@Override
public String getServiceAuthority() {
return AUTHORITY;
}
@Override
public void shutdown() {
shutdown = true;
}
}
}