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feat: PSL Connector Writer support (#121)
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97 changes: 97 additions & 0 deletions
97
src/main/java/com/google/cloud/pubsublite/spark/PslDataWriter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| /* | ||
| * Copyright 2020 Google LLC | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| package com.google.cloud.pubsublite.spark; | ||
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| import com.google.api.core.ApiFuture; | ||
| import com.google.api.core.ApiService; | ||
| import com.google.cloud.pubsublite.MessageMetadata; | ||
| import com.google.cloud.pubsublite.internal.Publisher; | ||
| import com.google.cloud.pubsublite.spark.internal.PublisherFactory; | ||
| import com.google.common.flogger.GoogleLogger; | ||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.ExecutionException; | ||
| import javax.annotation.concurrent.GuardedBy; | ||
| import org.apache.spark.sql.catalyst.InternalRow; | ||
| import org.apache.spark.sql.sources.v2.writer.DataWriter; | ||
| import org.apache.spark.sql.sources.v2.writer.WriterCommitMessage; | ||
| import org.apache.spark.sql.types.StructType; | ||
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| public class PslDataWriter implements DataWriter<InternalRow> { | ||
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| private static final GoogleLogger log = GoogleLogger.forEnclosingClass(); | ||
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| private final long partitionId, taskId, epochId; | ||
| private final StructType inputSchema; | ||
| private final PublisherFactory publisherFactory; | ||
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| @GuardedBy("this") | ||
| private Optional<Publisher<MessageMetadata>> publisher = Optional.empty(); | ||
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| @GuardedBy("this") | ||
| private final List<ApiFuture<MessageMetadata>> futures = new ArrayList<>(); | ||
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| public PslDataWriter( | ||
| long partitionId, | ||
| long taskId, | ||
| long epochId, | ||
| StructType schema, | ||
| PublisherFactory publisherFactory) { | ||
| this.partitionId = partitionId; | ||
| this.taskId = taskId; | ||
| this.epochId = epochId; | ||
| this.inputSchema = schema; | ||
| this.publisherFactory = publisherFactory; | ||
| } | ||
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| @Override | ||
| public synchronized void write(InternalRow record) { | ||
| if (!publisher.isPresent() || publisher.get().state() != ApiService.State.RUNNING) { | ||
| publisher = Optional.of(publisherFactory.newPublisher()); | ||
| } | ||
| futures.add( | ||
| publisher | ||
| .get() | ||
| .publish(Objects.requireNonNull(PslSparkUtils.toPubSubMessage(inputSchema, record)))); | ||
| } | ||
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| @Override | ||
| public synchronized WriterCommitMessage commit() throws IOException { | ||
| for (ApiFuture<MessageMetadata> f : futures) { | ||
| try { | ||
| f.get(); | ||
| } catch (InterruptedException | ExecutionException e) { | ||
| publisher = Optional.empty(); | ||
| throw new IOException(e); | ||
| } | ||
| } | ||
| log.atInfo().log( | ||
| "All writes for partitionId:%d, taskId:%d, epochId:%d succeeded, committing...", | ||
| partitionId, taskId, epochId); | ||
| return PslWriterCommitMessage.create(futures.size()); | ||
| } | ||
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| @Override | ||
| public synchronized void abort() { | ||
| log.atWarning().log( | ||
| "One or more writes for partitionId:%d, taskId:%d, epochId:%d failed, aborted.", | ||
| partitionId, taskId, epochId); | ||
| } | ||
| } |
45 changes: 45 additions & 0 deletions
45
src/main/java/com/google/cloud/pubsublite/spark/PslDataWriterFactory.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| /* | ||
| * Copyright 2020 Google LLC | ||
| * | ||
| * 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. | ||
| */ | ||
|
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| package com.google.cloud.pubsublite.spark; | ||
|
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| import com.google.cloud.pubsublite.spark.internal.CachedPublishers; | ||
| import com.google.cloud.pubsublite.spark.internal.PublisherFactory; | ||
| import java.io.Serializable; | ||
| import org.apache.spark.sql.catalyst.InternalRow; | ||
| import org.apache.spark.sql.sources.v2.writer.DataWriter; | ||
| import org.apache.spark.sql.sources.v2.writer.DataWriterFactory; | ||
| import org.apache.spark.sql.types.StructType; | ||
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| public class PslDataWriterFactory implements Serializable, DataWriterFactory<InternalRow> { | ||
| private static final long serialVersionUID = -6904546364310978844L; | ||
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| private static final CachedPublishers CACHED_PUBLISHERS = new CachedPublishers(); | ||
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| private final StructType inputSchema; | ||
| private final PslWriteDataSourceOptions writeOptions; | ||
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| public PslDataWriterFactory(StructType inputSchema, PslWriteDataSourceOptions writeOptions) { | ||
| this.inputSchema = inputSchema; | ||
| this.writeOptions = writeOptions; | ||
| } | ||
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| @Override | ||
| public DataWriter<InternalRow> createDataWriter(int partitionId, long taskId, long epochId) { | ||
| PublisherFactory pf = () -> CACHED_PUBLISHERS.getOrCreate(writeOptions); | ||
| return new PslDataWriter(partitionId, taskId, epochId, inputSchema, pf); | ||
| } | ||
| } |
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