m-trieu commented on code in PR #31883: URL: https://github.com/apache/beam/pull/31883#discussion_r1700646154
########## runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/windmill/work/provider/SingleSourceWorkProvider.java: ########## @@ -0,0 +1,178 @@ +/* + * 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.work.provider; + +import com.google.auto.value.AutoValue; +import java.util.Optional; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.function.Function; +import org.apache.beam.runners.dataflow.worker.streaming.ComputationState; +import org.apache.beam.runners.dataflow.worker.windmill.Windmill; +import org.apache.beam.runners.dataflow.worker.windmill.client.WindmillStream; +import org.apache.beam.runners.dataflow.worker.windmill.client.commits.WorkCommitter; +import org.apache.beam.runners.dataflow.worker.windmill.client.getdata.GetDataClient; +import org.apache.beam.runners.dataflow.worker.windmill.work.WorkItemReceiver; +import org.apache.beam.runners.dataflow.worker.windmill.work.processing.StreamingWorkScheduler; +import org.apache.beam.runners.dataflow.worker.windmill.work.refresh.HeartbeatSender; +import org.apache.beam.sdk.annotations.Internal; +import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Supplier; +import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.util.concurrent.ThreadFactoryBuilder; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * {@link WorkProvider} implementations that fetch {@link + * org.apache.beam.runners.dataflow.worker.windmill.Windmill.WorkItem}(s) from a single source. + */ +@Internal +public abstract class SingleSourceWorkProvider implements WorkProvider { + private static final Logger LOG = LoggerFactory.getLogger(SingleSourceWorkProvider.class); + protected final AtomicBoolean isRunning; + protected final WorkCommitter workCommitter; + protected final GetDataClient getDataClient; + protected final HeartbeatSender heartbeatSender; + protected final StreamingWorkScheduler streamingWorkScheduler; + protected final Runnable waitForResources; + protected final Function<String, Optional<ComputationState>> computationStateFetcher; + private final ExecutorService workProviderExecutor; + + protected SingleSourceWorkProvider( + WorkCommitter workCommitter, + GetDataClient getDataClient, + HeartbeatSender heartbeatSender, + StreamingWorkScheduler streamingWorkScheduler, + Runnable waitForResources, + Function<String, Optional<ComputationState>> computationStateFetcher) { + this.workCommitter = workCommitter; + this.getDataClient = getDataClient; + this.heartbeatSender = heartbeatSender; + this.streamingWorkScheduler = streamingWorkScheduler; + this.waitForResources = waitForResources; + this.computationStateFetcher = computationStateFetcher; + this.workProviderExecutor = + Executors.newSingleThreadScheduledExecutor( + new ThreadFactoryBuilder() + .setDaemon(true) + .setPriority(Thread.MIN_PRIORITY) + .setNameFormat(debugName() + "DispatchThread") + .build()); + this.isRunning = new AtomicBoolean(false); + } + + public static SingleSourceWorkProviderBuilder.Builder builder() { + return new AutoValue_SingleSourceWorkProvider_SingleSourceWorkProviderBuilder.Builder(); + } + + @SuppressWarnings("FutureReturnValueIgnored") + @Override + public final void start() { + if (isRunning.compareAndSet(false, true) && !workProviderExecutor.isShutdown()) { + workProviderExecutor.submit( + () -> { + LOG.info("Dispatch starting"); + dispatchLoop(); + LOG.info("Dispatch done"); + }); + workCommitter.start(); + } + } + + @Override + public final void shutdown() { + if (isRunning.get() && !workProviderExecutor.isShutdown()) { + workProviderExecutor.shutdown(); + boolean isTerminated = false; + try { + isTerminated = workProviderExecutor.awaitTermination(10, TimeUnit.SECONDS); + } catch (InterruptedException e) { + LOG.warn("Unable to shutdown WorkProvider"); + } + + if (!isTerminated) { + workProviderExecutor.shutdownNow(); + } + workCommitter.stop(); + isRunning.set(false); + } + } + + protected abstract void dispatchLoop(); + + protected abstract String debugName(); + + @AutoValue + public abstract static class SingleSourceWorkProviderBuilder { + public abstract WorkCommitter workCommitter(); + + public abstract GetDataClient getDataClient(); + + public abstract HeartbeatSender heartbeatSender(); + + public abstract StreamingWorkScheduler streamingWorkScheduler(); + + public abstract Runnable waitForResources(); + + public abstract Function<String, Optional<ComputationState>> computationStateFetcher(); + + @AutoValue.Builder + public abstract static class Builder { + public abstract Builder setWorkCommitter(WorkCommitter value); + + public abstract Builder setGetDataClient(GetDataClient value); + + public abstract Builder setHeartbeatSender(HeartbeatSender value); + + public abstract Builder setStreamingWorkScheduler(StreamingWorkScheduler value); + + public abstract Builder setWaitForResources(Runnable value); + + public abstract Builder setComputationStateFetcher( + Function<String, Optional<ComputationState>> value); + + abstract SingleSourceWorkProviderBuilder autoBuild(); + + public final WorkProvider build(Supplier<Windmill.GetWorkResponse> getWorkFn) { + SingleSourceWorkProviderBuilder params = autoBuild(); + return new ApplianceWorkProvider( Review Comment: done -- This is an automated message from the Apache Git Service. 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