| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.beam.runners.direct.portable.artifact; |
| |
| import static org.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkState; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import javax.annotation.Nullable; |
| import org.apache.beam.model.jobmanagement.v1.ArtifactApi; |
| import org.apache.beam.model.jobmanagement.v1.ArtifactStagingServiceGrpc; |
| import org.apache.beam.runners.fnexecution.FnService; |
| import org.apache.beam.vendor.grpc.v1p13p1.io.grpc.Status; |
| import org.apache.beam.vendor.grpc.v1p13p1.io.grpc.StatusException; |
| import org.apache.beam.vendor.grpc.v1p13p1.io.grpc.StatusRuntimeException; |
| import org.apache.beam.vendor.grpc.v1p13p1.io.grpc.stub.StreamObserver; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.annotations.VisibleForTesting; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.base.Throwables; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * An {@code ArtifactStagingService} which stages files to a local temp directory. TODO: refactor to |
| * use staging session tokens |
| */ |
| public class LocalFileSystemArtifactStagerService |
| extends ArtifactStagingServiceGrpc.ArtifactStagingServiceImplBase implements FnService { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(LocalFileSystemArtifactStagerService.class); |
| |
| public static LocalFileSystemArtifactStagerService forRootDirectory(File base) { |
| return new LocalFileSystemArtifactStagerService(base); |
| } |
| |
| private final LocalArtifactStagingLocation location; |
| |
| private LocalFileSystemArtifactStagerService(File stagingBase) { |
| this.location = LocalArtifactStagingLocation.createAt(stagingBase); |
| } |
| |
| @Override |
| public StreamObserver<ArtifactApi.PutArtifactRequest> putArtifact( |
| final StreamObserver<ArtifactApi.PutArtifactResponse> responseObserver) { |
| return new CreateAndWriteFileObserver(responseObserver); |
| } |
| |
| @Override |
| public void commitManifest( |
| ArtifactApi.CommitManifestRequest request, |
| StreamObserver<ArtifactApi.CommitManifestResponse> responseObserver) { |
| try { |
| commitManifestOrThrow(request, responseObserver); |
| } catch (StatusRuntimeException e) { |
| responseObserver.onError(e); |
| LOG.error("Failed to commit Manifest {}", request.getManifest(), e); |
| } catch (Exception e) { |
| responseObserver.onError( |
| Status.INTERNAL |
| .withCause(e) |
| .withDescription(Throwables.getStackTraceAsString(e)) |
| .asRuntimeException()); |
| LOG.error("Failed to commit Manifest {}", request.getManifest(), e); |
| } |
| } |
| |
| private void commitManifestOrThrow( |
| ArtifactApi.CommitManifestRequest request, |
| StreamObserver<ArtifactApi.CommitManifestResponse> responseObserver) |
| throws IOException { |
| Collection<ArtifactApi.ArtifactMetadata> missing = new ArrayList<>(); |
| for (ArtifactApi.ArtifactMetadata artifact : request.getManifest().getArtifactList()) { |
| // TODO: Validate the checksums on the server side, to fail more aggressively if require |
| if (!location.getArtifactFile(artifact.getName()).exists()) { |
| missing.add(artifact); |
| } |
| } |
| if (!missing.isEmpty()) { |
| throw Status.INVALID_ARGUMENT |
| .withDescription( |
| String.format("Attempted to commit manifest with missing Artifacts: [%s]", missing)) |
| .asRuntimeException(); |
| } |
| File mf = location.getManifestFile(); |
| checkState(mf.createNewFile(), "Could not create file to store manifest"); |
| try (OutputStream mfOut = new FileOutputStream(mf)) { |
| request.getManifest().writeTo(mfOut); |
| } |
| responseObserver.onNext( |
| ArtifactApi.CommitManifestResponse.newBuilder() |
| .setRetrievalToken(location.getRootPath()) |
| .build()); |
| responseObserver.onCompleted(); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| // TODO: Close all active staging calls, signalling errors to the caller. |
| } |
| |
| @VisibleForTesting |
| LocalArtifactStagingLocation getLocation() { |
| return location; |
| } |
| |
| private class CreateAndWriteFileObserver |
| implements StreamObserver<ArtifactApi.PutArtifactRequest> { |
| private final StreamObserver<ArtifactApi.PutArtifactResponse> responseObserver; |
| private FileWritingObserver writer; |
| |
| private CreateAndWriteFileObserver( |
| StreamObserver<ArtifactApi.PutArtifactResponse> responseObserver) { |
| this.responseObserver = responseObserver; |
| } |
| |
| @Override |
| public void onNext(ArtifactApi.PutArtifactRequest value) { |
| try { |
| if (writer == null) { |
| if (!value.getContentCase().equals(ArtifactApi.PutArtifactRequest.ContentCase.METADATA)) { |
| throw Status.INVALID_ARGUMENT |
| .withDescription( |
| String.format( |
| "Expected the first %s to contain the Artifact Name, got %s", |
| ArtifactApi.PutArtifactRequest.class.getSimpleName(), |
| value.getContentCase())) |
| .asRuntimeException(); |
| } |
| writer = createFile(value.getMetadata().getMetadata()); |
| } else { |
| writer.onNext(value); |
| } |
| } catch (StatusRuntimeException e) { |
| responseObserver.onError(e); |
| } catch (Exception e) { |
| responseObserver.onError( |
| Status.INTERNAL |
| .withCause(e) |
| .withDescription(Throwables.getStackTraceAsString(e)) |
| .asRuntimeException()); |
| } |
| } |
| |
| private FileWritingObserver createFile(ArtifactApi.ArtifactMetadata metadata) |
| throws IOException { |
| File destination = location.getArtifactFile(metadata.getName()); |
| if (!destination.createNewFile()) { |
| throw Status.ALREADY_EXISTS |
| .withDescription(String.format("Artifact with name %s already exists", metadata)) |
| .asRuntimeException(); |
| } |
| return new FileWritingObserver( |
| destination, new FileOutputStream(destination), responseObserver); |
| } |
| |
| @Override |
| public void onError(Throwable t) { |
| if (writer != null) { |
| writer.onError(t); |
| } else { |
| responseObserver.onCompleted(); |
| } |
| } |
| |
| @Override |
| public void onCompleted() { |
| if (writer != null) { |
| writer.onCompleted(); |
| } else { |
| responseObserver.onCompleted(); |
| } |
| } |
| } |
| |
| private static class FileWritingObserver |
| implements StreamObserver<ArtifactApi.PutArtifactRequest> { |
| private final File destination; |
| private final OutputStream target; |
| private final StreamObserver<ArtifactApi.PutArtifactResponse> responseObserver; |
| |
| private FileWritingObserver( |
| File destination, |
| OutputStream target, |
| StreamObserver<ArtifactApi.PutArtifactResponse> responseObserver) { |
| this.destination = destination; |
| this.target = target; |
| this.responseObserver = responseObserver; |
| } |
| |
| @Override |
| public void onNext(ArtifactApi.PutArtifactRequest value) { |
| try { |
| if (value.getData() == null) { |
| StatusRuntimeException e = |
| Status.INVALID_ARGUMENT |
| .withDescription( |
| String.format( |
| "Expected all chunks in the current stream state to contain data, got %s", |
| value.getContentCase())) |
| .asRuntimeException(); |
| throw e; |
| } |
| value.getData().getData().writeTo(target); |
| } catch (Exception e) { |
| cleanedUp(e); |
| } |
| } |
| |
| @Override |
| public void onError(Throwable t) { |
| if (cleanedUp(null)) { |
| responseObserver.onCompleted(); |
| } |
| } |
| |
| @Override |
| public void onCompleted() { |
| try { |
| target.close(); |
| } catch (IOException e) { |
| LOG.error("Failed to complete writing file {}", destination, e); |
| cleanedUp(e); |
| return; |
| } |
| responseObserver.onNext(ArtifactApi.PutArtifactResponse.getDefaultInstance()); |
| responseObserver.onCompleted(); |
| } |
| |
| /** |
| * Cleans up after the file writing failed exceptionally, due to an error either in the service |
| * or sent from the client. |
| * |
| * @return false if an error was reported, true otherwise |
| */ |
| private boolean cleanedUp(@Nullable Throwable whyFailed) { |
| Throwable actual = whyFailed; |
| try { |
| target.close(); |
| if (!destination.delete()) { |
| LOG.debug("Couldn't delete failed write at {}", destination); |
| } |
| } catch (IOException e) { |
| if (whyFailed == null) { |
| actual = e; |
| } else { |
| actual.addSuppressed(e); |
| } |
| LOG.error("Failed to clean up after writing file {}", destination, e); |
| } |
| if (actual != null) { |
| if (actual instanceof StatusException || actual instanceof StatusRuntimeException) { |
| responseObserver.onError(actual); |
| } else { |
| Status status = |
| Status.INTERNAL |
| .withCause(actual) |
| .withDescription(Throwables.getStackTraceAsString(actual)); |
| responseObserver.onError(status.asException()); |
| } |
| } |
| return actual == null; |
| } |
| } |
| } |