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Support BinderChannelBuilder.forTarget. (#8633)
Allows this class to be used with custom name resolvers.
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94 changes: 94 additions & 0 deletions
94
testing/src/main/java/io/grpc/internal/testing/FakeNameResolverProvider.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,94 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package io.grpc.internal.testing; | ||
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| 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; | ||
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| /** A name resolver to always resolve the given URI into the given address. */ | ||
| public final class FakeNameResolverProvider extends NameResolverProvider { | ||
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| private final URI targetUri; | ||
| private final SocketAddress address; | ||
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| public FakeNameResolverProvider(String targetUri, SocketAddress address) { | ||
| this.targetUri = URI.create(targetUri); | ||
| this.address = address; | ||
| } | ||
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| @Override | ||
| public NameResolver newNameResolver(URI targetUri, NameResolver.Args args) { | ||
| if (targetUri.equals(this.targetUri)) { | ||
| return new FakeNameResolver(address); | ||
| } | ||
| return null; | ||
| } | ||
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| @Override | ||
| protected boolean isAvailable() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| protected int priority() { | ||
| return 5; // Default | ||
| } | ||
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| @Override | ||
| public String getDefaultScheme() { | ||
| return targetUri.getScheme(); | ||
| } | ||
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| /** A single name resolver. */ | ||
| private static final class FakeNameResolver extends NameResolver { | ||
| private static final String AUTHORITY = "fake-authority"; | ||
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| private final SocketAddress address; | ||
| private volatile boolean shutdown; | ||
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| private FakeNameResolver(SocketAddress address) { | ||
| this.address = address; | ||
| } | ||
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| @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()); | ||
| } | ||
| } | ||
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| @Override | ||
| public String getServiceAuthority() { | ||
| return AUTHORITY; | ||
| } | ||
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| @Override | ||
| public void shutdown() { | ||
| shutdown = true; | ||
| } | ||
| } | ||
| } |