[
https://issues.apache.org/jira/browse/BEAM-4290?focusedWorklogId=110837&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-110837
]
ASF GitHub Bot logged work on BEAM-4290:
----------------------------------------
Author: ASF GitHub Bot
Created on: 11/Jun/18 21:04
Start Date: 11/Jun/18 21:04
Worklog Time Spent: 10m
Work Description: angoenka commented on a change in pull request #5591:
[BEAM-4290] Beam File System based ArtifactStagingService
URL: https://github.com/apache/beam/pull/5591#discussion_r194534830
##########
File path:
runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/artifact/BeamFileSystemArtifactStagingService.java
##########
@@ -0,0 +1,292 @@
+/*
+ * 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.fnexecution.artifact;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.hash.Hashing;
+import com.google.protobuf.util.JsonFormat;
+import io.grpc.stub.StreamObserver;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.Serializable;
+import java.nio.channels.WritableByteChannel;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.util.Collections;
+import org.apache.beam.model.jobmanagement.v1.ArtifactApi.ArtifactMetadata;
+import
org.apache.beam.model.jobmanagement.v1.ArtifactApi.CommitManifestRequest;
+import
org.apache.beam.model.jobmanagement.v1.ArtifactApi.CommitManifestResponse;
+import org.apache.beam.model.jobmanagement.v1.ArtifactApi.ProxyManifest;
+import
org.apache.beam.model.jobmanagement.v1.ArtifactApi.ProxyManifest.Location;
+import org.apache.beam.model.jobmanagement.v1.ArtifactApi.PutArtifactMetadata;
+import org.apache.beam.model.jobmanagement.v1.ArtifactApi.PutArtifactRequest;
+import org.apache.beam.model.jobmanagement.v1.ArtifactApi.PutArtifactResponse;
+import
org.apache.beam.model.jobmanagement.v1.ArtifactStagingServiceGrpc.ArtifactStagingServiceImplBase;
+import org.apache.beam.runners.fnexecution.FnService;
+import org.apache.beam.sdk.io.FileSystems;
+import org.apache.beam.sdk.io.fs.MoveOptions.StandardMoveOptions;
+import org.apache.beam.sdk.io.fs.ResolveOptions.StandardResolveOptions;
+import org.apache.beam.sdk.io.fs.ResourceId;
+import org.apache.beam.sdk.util.MimeTypes;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * {@link ArtifactStagingServiceImplBase} based on beam file system.
+ */
+public class BeamFileSystemArtifactStagingService extends
ArtifactStagingServiceImplBase implements
+ FnService {
+
+ private static final Logger LOG =
+ LoggerFactory.getLogger(BeamFileSystemArtifactStagingService.class);
+ private static final ObjectMapper MAPPER = new ObjectMapper();
+ // Use UTF8 for all text encoding.
+ private static final Charset CHARSET = StandardCharsets.UTF_8;
+ public static final String MANIFEST = "MANIFEST";
+
+ @Override
+ public StreamObserver<PutArtifactRequest> putArtifact(
+ StreamObserver<PutArtifactResponse> responseObserver) {
+ return new PutArtifactStreamObserver(responseObserver);
+ }
+
+ @Override
+ public void commitManifest(
+ CommitManifestRequest request, StreamObserver<CommitManifestResponse>
responseObserver) {
+ try {
+ ResourceId manifestResourceId =
getManifestFileResourceId(request.getStagingSessionToken());
+ ResourceId artifactDirResourceId =
getArtifactDirResourceId(request.getStagingSessionToken());
+ ProxyManifest.Builder proxyManifestBuilder = ProxyManifest.newBuilder()
+ .setManifest(request.getManifest());
+ for (ArtifactMetadata artifactMetadata :
request.getManifest().getArtifactList()) {
+ proxyManifestBuilder.addLocation(Location.newBuilder()
+ .setName(artifactMetadata.getName())
+ .setUri(artifactDirResourceId
+ .resolve(encodedFileName(artifactMetadata),
StandardResolveOptions.RESOLVE_FILE)
+ .toString()).build());
+ }
+ try (WritableByteChannel manifestWritableByteChannel = FileSystems
+ .create(manifestResourceId, MimeTypes.TEXT)) {
+ manifestWritableByteChannel
+
.write(CHARSET.encode(JsonFormat.printer().print(proxyManifestBuilder.build())));
+ }
+ // TODO: Validate integrity of staged files.
+ responseObserver.onNext(CommitManifestResponse.newBuilder()
+ .setStagingToken(manifestResourceId.toString())
+ .build());
+ responseObserver.onCompleted();
+ } catch (IOException e) {
+ // TODO: Cleanup all the artifacts.
+ LOG.error("Unable to commit manifest.", e);
+ responseObserver.onError(e);
+ }
+ }
+
+ @Override
+ public void close() throws Exception {
+ // Nothing to close here.
+ }
+
+ /**
+ * Generate a stagingSessionToken compatible with {@link
BeamFileSystemArtifactStagingService}.
+ *
+ * @param sessionId Unique sessionId for artifact staging.
+ * @param basePath Base path to upload artifacts.
+ * @return Encoded stagingSessionToken.
+ */
+ public static String generateStagingSessionToken(String sessionId, String
basePath)
+ throws Exception {
+ StagingSessionToken stagingSessionToken = new StagingSessionToken();
+ stagingSessionToken.setSessionId(sessionId);
+ stagingSessionToken.setBasePath(basePath);
+ return encodeStagingSessionToken(stagingSessionToken);
+ }
+
+ private String encodedFileName(ArtifactMetadata artifactMetadata) {
+ return "artifact_" +
Hashing.sha256().hashString(artifactMetadata.getName(), CHARSET)
+ .toString();
+ }
+
+ private StagingSessionToken decodeStagingSessionToken(String
stagingSessionToken)
+ throws IOException {
+ try {
+ return MAPPER.readValue(stagingSessionToken, StagingSessionToken.class);
+ } catch (IOException e) {
+ try {
+ LOG.error(
+ "Unable to deserialize staging token {}. Expected format {}. Error
{}",
+ stagingSessionToken, MAPPER.writeValueAsString(new
StagingSessionToken()),
+ e.getMessage());
+ } catch (JsonProcessingException e1) {
+ LOG.error("Error {} occurred while serializing {}.", e.getMessage(),
+ StagingSessionToken.class);
+ }
+ throw e;
+ }
+ }
+
+ private static String encodeStagingSessionToken(StagingSessionToken
stagingSessionToken)
+ throws Exception {
+ try {
+ return MAPPER.writeValueAsString(stagingSessionToken);
+ } catch (JsonProcessingException e) {
+ LOG.error("Error {} occurred while serializing {}.", e.getMessage(),
+ StagingSessionToken.class);
+ throw e;
+ }
+ }
+
+ private ResourceId getJobDirResourceId(String stagingSessionToken) throws
IOException {
+ ResourceId baseResourceId;
+ StagingSessionToken parsedToken =
decodeStagingSessionToken(stagingSessionToken);
+ try {
+ baseResourceId =
FileSystems.matchSingleFileSpec(parsedToken.getBasePath())
Review comment:
Makes sense.
I was under the impression that matchNewResource will throw exception for
already existing resource.
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Issue Time Tracking
-------------------
Worklog Id: (was: 110837)
> ArtifactStagingService that stages to a distributed filesystem
> --------------------------------------------------------------
>
> Key: BEAM-4290
> URL: https://issues.apache.org/jira/browse/BEAM-4290
> Project: Beam
> Issue Type: Sub-task
> Components: runner-core
> Reporter: Eugene Kirpichov
> Assignee: Ankur Goenka
> Priority: Major
> Time Spent: 14h
> Remaining Estimate: 0h
>
> Using the job's staging directory from PipelineOptions.
> Physical layout on the distributed filesystem is TBD but it should allow for
> arbitrary filenames and ideally for eventually avoiding uploading artifacts
> that are already there.
> Handling credentials is TBD.
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