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// Copyright 2018 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.common.base.Strings;
import com.google.common.collect.ImmutableSet;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.common.util.concurrent.MoreExecutors;
import com.google.devtools.build.lib.buildeventstream.BuildEvent.LocalFile;
import com.google.devtools.build.lib.buildeventstream.BuildEventArtifactUploader;
import com.google.devtools.build.lib.buildeventstream.PathConverter;
import com.google.devtools.build.lib.remote.util.DigestUtil;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.remoteexecution.v1test.Digest;
import io.grpc.Context;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.annotation.Nullable;
/**
* A {@link BuildEventArtifactUploader} backed by {@link ByteStreamUploader}.
*/
class ByteStreamBuildEventArtifactUploader implements BuildEventArtifactUploader {
private final ListeningExecutorService uploadExecutor =
MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());
private final Context ctx;
private final ByteStreamUploader uploader;
private final String remoteServerInstanceName;
private final AtomicBoolean shutdown = new AtomicBoolean();
ByteStreamBuildEventArtifactUploader(
ByteStreamUploader uploader, String remoteServerName, Context ctx,
@Nullable String remoteInstanceName) {
this.uploader = Preconditions.checkNotNull(uploader);
String remoteServerInstanceName = Preconditions.checkNotNull(remoteServerName);
if (!Strings.isNullOrEmpty(remoteInstanceName)) {
remoteServerInstanceName += "/" + remoteInstanceName;
}
this.ctx = ctx;
this.remoteServerInstanceName = remoteServerInstanceName;
}
@Override
public ListenableFuture<PathConverter> upload(Map<Path, LocalFile> files) {
if (files.isEmpty()) {
return Futures.immediateFuture(PathConverter.NO_CONVERSION);
}
List<ListenableFuture<PathDigestPair>> uploads = new ArrayList<>(files.size());
for (Path file : files.keySet()) {
ListenableFuture<Boolean> isDirectoryFuture = uploadExecutor.submit(() -> file.isDirectory());
ListenableFuture<PathDigestPair> digestFuture =
Futures.transformAsync(
isDirectoryFuture,
isDirectory -> {
if (isDirectory) {
return Futures.immediateFuture(new PathDigestPair(file, null));
}
DigestUtil digestUtil = new DigestUtil(file.getFileSystem().getDigestFunction());
Digest digest = digestUtil.compute(file);
Chunker chunker = Chunker.builder(digestUtil).setInput(digest, file).build();
final ListenableFuture<Void> upload;
Context prevCtx = ctx.attach();
try {
upload = uploader.uploadBlobAsync(chunker, /*forceUpload=*/ false);
} finally {
ctx.detach(prevCtx);
}
return Futures.transform(
upload, unused -> new PathDigestPair(file, digest), uploadExecutor);
},
MoreExecutors.directExecutor());
uploads.add(digestFuture);
}
return Futures.transform(
Futures.allAsList(uploads),
pathDigestPairs -> new PathConverterImpl(remoteServerInstanceName, pathDigestPairs),
MoreExecutors.directExecutor());
}
@Override
public void shutdown() {
if (shutdown.getAndSet(true)) {
return;
}
uploader.release();
}
private static class PathConverterImpl implements PathConverter {
private final String remoteServerInstanceName;
private final Map<Path, Digest> pathToDigest;
private final Set<Path> skippedPaths;
PathConverterImpl(String remoteServerInstanceName, List<PathDigestPair> uploads) {
Preconditions.checkNotNull(uploads);
this.remoteServerInstanceName = remoteServerInstanceName;
pathToDigest = new HashMap<>(uploads.size());
ImmutableSet.Builder<Path> skippedPaths = ImmutableSet.builder();
for (PathDigestPair pair : uploads) {
Path path = pair.getPath();
Digest digest = pair.getDigest();
if (digest != null) {
pathToDigest.put(path, digest);
} else {
skippedPaths.add(path);
}
}
this.skippedPaths = skippedPaths.build();
}
@Override
public String apply(Path path) {
Preconditions.checkNotNull(path);
Digest digest = pathToDigest.get(path);
if (digest == null) {
if (skippedPaths.contains(path)) {
return null;
}
// It's a programming error to reference a file that has not been uploaded.
throw new IllegalStateException(
String.format("Illegal file reference: '%s'", path.getPathString()));
}
return String.format(
"bytestream://%s/blobs/%s/%d",
remoteServerInstanceName, digest.getHash(), digest.getSizeBytes());
}
}
private static class PathDigestPair {
private final Path path;
private final Digest digest;
PathDigestPair(Path path, Digest digest) {
this.path = path;
this.digest = digest;
}
public Path getPath() {
return path;
}
public Digest getDigest() {
return digest;
}
}
}
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