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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 com.google.common.base.Preconditions;
import com.google.devtools.build.lib.remote.RemoteProtocol.BlobChunk;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasDownloadBlobRequest;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasDownloadReply;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasDownloadTreeMetadataReply;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasDownloadTreeMetadataRequest;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasLookupReply;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasLookupRequest;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasStatus;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasUploadBlobReply;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasUploadBlobRequest;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasUploadTreeMetadataReply;
import com.google.devtools.build.lib.remote.RemoteProtocol.CasUploadTreeMetadataRequest;
import com.google.devtools.build.lib.remote.RemoteProtocol.ContentDigest;
import com.google.protobuf.ByteString;
import io.grpc.stub.StreamObserver;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
/** An in-memory implementation of GrpcCasInterface. */
final class InMemoryCas implements GrpcCasInterface {
private final Map<ByteString, ByteString> content = new HashMap<>();
public ContentDigest put(byte[] data) {
ContentDigest digest = ContentDigests.computeDigest(data);
ByteString key = digest.getDigest();
ByteString value = ByteString.copyFrom(data);
content.put(key, value);
return digest;
}
@Override
public CasLookupReply lookup(CasLookupRequest request) {
CasStatus.Builder result = CasStatus.newBuilder();
for (ContentDigest digest : request.getDigestList()) {
ByteString key = digest.getDigest();
if (!content.containsKey(key)) {
result.addMissingDigest(digest);
}
}
if (result.getMissingDigestCount() != 0) {
result.setError(CasStatus.ErrorCode.MISSING_DIGEST);
} else {
result.setSucceeded(true);
}
return CasLookupReply.newBuilder().setStatus(result).build();
}
@Override
public CasUploadTreeMetadataReply uploadTreeMetadata(CasUploadTreeMetadataRequest request) {
return CasUploadTreeMetadataReply.newBuilder()
.setStatus(CasStatus.newBuilder().setSucceeded(true))
.build();
}
@Override
public CasDownloadTreeMetadataReply downloadTreeMetadata(
CasDownloadTreeMetadataRequest request) {
throw new UnsupportedOperationException();
}
@Override
public Iterator<CasDownloadReply> downloadBlob(CasDownloadBlobRequest request) {
List<CasDownloadReply> result = new ArrayList<>();
for (ContentDigest digest : request.getDigestList()) {
CasDownloadReply.Builder builder = CasDownloadReply.newBuilder();
ByteString item = content.get(digest.getDigest());
if (item != null) {
builder.setStatus(CasStatus.newBuilder().setSucceeded(true));
builder.setData(BlobChunk.newBuilder().setData(item).setDigest(digest));
} else {
throw new IllegalStateException();
}
result.add(builder.build());
}
return result.iterator();
}
@Override
public StreamObserver<CasUploadBlobRequest> uploadBlobAsync(
final StreamObserver<CasUploadBlobReply> responseObserver) {
return new StreamObserver<CasUploadBlobRequest>() {
private ContentDigest digest;
private ByteArrayOutputStream current;
@Override
public void onNext(CasUploadBlobRequest value) {
BlobChunk chunk = value.getData();
if (chunk.hasDigest()) {
Preconditions.checkState(digest == null);
digest = chunk.getDigest();
current = new ByteArrayOutputStream();
}
try {
current.write(chunk.getData().toByteArray());
} catch (IOException e) {
throw new RuntimeException(e);
}
responseObserver.onNext(
CasUploadBlobReply.newBuilder()
.setStatus(CasStatus.newBuilder().setSucceeded(true))
.build());
}
@Override
public void onError(Throwable t) {
throw new RuntimeException(t);
}
@Override
public void onCompleted() {
ContentDigest check = ContentDigests.computeDigest(current.toByteArray());
Preconditions.checkState(check.equals(digest), "%s != %s", digest, check);
ByteString key = digest.getDigest();
ByteString value = ByteString.copyFrom(current.toByteArray());
digest = null;
current = null;
content.put(key, value);
responseObserver.onCompleted();
}
};
}
}
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