m-trieu commented on code in PR #30312: URL: https://github.com/apache/beam/pull/30312#discussion_r1508313573
########## runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/windmill/client/commits/StreamingEngineWorkCommitter.java: ########## @@ -0,0 +1,210 @@ +/* + * 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.dataflow.worker.windmill.client.commits; + +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicLong; +import java.util.function.Consumer; +import java.util.function.Supplier; +import javax.annotation.concurrent.ThreadSafe; +import org.apache.beam.runners.dataflow.worker.streaming.WeightedBoundedQueue; +import org.apache.beam.runners.dataflow.worker.streaming.Work; +import org.apache.beam.runners.dataflow.worker.windmill.client.CloseableStream; +import org.apache.beam.runners.dataflow.worker.windmill.client.WindmillStream.CommitWorkStream; +import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions; +import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.util.concurrent.ThreadFactoryBuilder; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Streaming engine implementation of {@link WorkCommitter}. Commits work back to Streaming Engine + * backend. + */ +@ThreadSafe +final class StreamingEngineWorkCommitter implements WorkCommitter { + private static final Logger LOG = LoggerFactory.getLogger(StreamingEngineWorkCommitter.class); + private static final int COMMIT_BATCH_SIZE = 5; + + private final Supplier<CloseableStream<CommitWorkStream>> commitWorkStreamFactory; + private final WeightedBoundedQueue<Commit> commitQueue; + private final ExecutorService commitSenders; + private final AtomicLong activeCommitBytes; + private final Supplier<Boolean> shouldCommitWork; + private final Consumer<Commit> onFailedCommit; + private final Consumer<CompleteCommit> onCommitComplete; + private final int numCommitSenders; + + private StreamingEngineWorkCommitter( + Supplier<CloseableStream<CommitWorkStream>> commitWorkStreamFactory, + int numCommitSenders, + Supplier<Boolean> shouldCommitWork, + Consumer<Commit> onFailedCommit, + Consumer<CompleteCommit> onCommitComplete) { + this.commitWorkStreamFactory = commitWorkStreamFactory; + this.commitQueue = + WeightedBoundedQueue.create( + MAX_COMMIT_QUEUE_BYTES, commit -> Math.min(MAX_COMMIT_QUEUE_BYTES, commit.getSize())); + this.commitSenders = + Executors.newFixedThreadPool( + numCommitSenders, + new ThreadFactoryBuilder() + .setDaemon(true) + .setPriority(Thread.MAX_PRIORITY) + .setNameFormat("CommitThread-%d") + .build()); + this.activeCommitBytes = new AtomicLong(); + this.shouldCommitWork = shouldCommitWork; + this.onFailedCommit = onFailedCommit; + this.onCommitComplete = onCommitComplete; + this.numCommitSenders = numCommitSenders; + } + + static StreamingEngineWorkCommitter create( + Supplier<CloseableStream<CommitWorkStream>> commitWorkStreamFactory, + int numCommitSenders, + Supplier<Boolean> shouldCommitWork, + Consumer<Commit> onFailedCommit, + Consumer<CompleteCommit> onCommitComplete, + CountDownLatch ready) { + StreamingEngineWorkCommitter workCommitter = + new StreamingEngineWorkCommitter( + commitWorkStreamFactory, + numCommitSenders, + shouldCommitWork, + onFailedCommit, + onCommitComplete); + workCommitter.startCommitSenders(ready); + return workCommitter; + } + + @Override + public void commit(Commit commit) { + commitQueue.put(commit); + } + + @Override + public long currentActiveCommitBytes() { + return activeCommitBytes.get(); + } + + @Override + public void stop() { + commitSenders.shutdownNow(); + } + + @Override + public int parallelism() { + return numCommitSenders; + } + + @SuppressWarnings("FutureReturnValueIgnored") + private void startCommitSenders(CountDownLatch ready) { + for (int i = 0; i < numCommitSenders; i++) { + commitSenders.submit( + () -> { + while (true) { + try { + ready.await(); + break; + } catch (InterruptedException ignore) { + } + } + streamingCommitLoop(); + }); + } + } + + private void streamingCommitLoop() { + Commit initialCommit = null; + while (shouldCommitWork.get()) { + if (initialCommit == null) { + try { + initialCommit = commitQueue.take(); + } catch (InterruptedException e) { + continue; + } + } + + try (CloseableStream<CommitWorkStream> closeableCommitStream = + commitWorkStreamFactory.get()) { + CommitWorkStream commitStream = closeableCommitStream.stream().get(); + if (!tryAddToCommitStream(initialCommit, commitStream)) { + throw new AssertionError("Initial commit on flushed stream should always be accepted."); + } + // Batch additional commits to the stream and possibly make an un-batched commit the next + // initial commit. + initialCommit = batchCommitsToStream(commitStream); + commitStream.flush(); + } catch (Exception e) { + LOG.error("Error occurred fetching a CommitWorkStream.", e); + } + } + } + + /** Adds the commit to the commitStream if it fits, returning true if it is consumed. */ + private boolean tryAddToCommitStream(Commit commit, CommitWorkStream commitStream) { + Preconditions.checkNotNull(commit); + // Drop commits for failed work. Such commits will be dropped by Windmill anyway. + if (commit.work().isFailed()) { Review Comment: done -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
