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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.remote;
import static com.google.common.truth.Truth.assertThat;
import com.google.bytestream.ByteStreamGrpc.ByteStreamImplBase;
import com.google.bytestream.ByteStreamProto.ReadRequest;
import com.google.bytestream.ByteStreamProto.ReadResponse;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.remoteexecution.v1test.Digest;
import com.google.protobuf.ByteString;
import io.grpc.Status;
import io.grpc.stub.StreamObserver;
import java.util.HashMap;
import java.util.Map;
class FakeImmutableCacheByteStreamImpl extends ByteStreamImplBase {
private final Map<ReadRequest, ReadResponse> cannedReplies;
private final Map<ReadRequest, Integer> numErrors;
// Start returning the correct response after this number of errors is reached.
private static final int MAX_ERRORS = 3;
public FakeImmutableCacheByteStreamImpl(Map<Digest, String> contents) {
ImmutableMap.Builder<ReadRequest, ReadResponse> b = ImmutableMap.builder();
for (Map.Entry<Digest, String> e : contents.entrySet()) {
b.put(
ReadRequest.newBuilder()
.setResourceName("blobs/" + e.getKey().getHash() + "/" + e.getKey().getSizeBytes())
.build(),
ReadResponse.newBuilder().setData(ByteString.copyFromUtf8(e.getValue())).build());
}
cannedReplies = b.build();
numErrors = new HashMap<>();
}
public FakeImmutableCacheByteStreamImpl(Digest digest, String contents) {
this(ImmutableMap.of(digest, contents));
}
public FakeImmutableCacheByteStreamImpl(Digest d1, String c1, Digest d2, String c2) {
this(ImmutableMap.of(d1, c1, d2, c2));
}
@Override
public void read(ReadRequest request, StreamObserver<ReadResponse> responseObserver) {
assertThat(cannedReplies.containsKey(request)).isTrue();
int errCount = numErrors.getOrDefault(request, 0);
if (errCount < MAX_ERRORS) {
numErrors.put(request, errCount + 1);
responseObserver.onError(Status.UNAVAILABLE.asRuntimeException()); // Retriable error.
} else {
responseObserver.onNext(cannedReplies.get(request));
responseObserver.onCompleted();
}
}
}
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