| /* |
| * 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.sdk.io.gcp.pubsublite; |
| |
| import static com.google.cloud.pubsublite.internal.wire.ApiServiceUtils.blockingShutdown; |
| |
| import com.google.api.core.ApiService.Listener; |
| import com.google.api.core.ApiService.State; |
| import com.google.cloud.pubsublite.Offset; |
| import com.google.cloud.pubsublite.cloudpubsub.FlowControlSettings; |
| import com.google.cloud.pubsublite.internal.CheckedApiException; |
| import com.google.cloud.pubsublite.internal.ExtractStatus; |
| import com.google.cloud.pubsublite.internal.wire.Subscriber; |
| import com.google.cloud.pubsublite.internal.wire.SystemExecutors; |
| import com.google.cloud.pubsublite.proto.FlowControlRequest; |
| import com.google.cloud.pubsublite.proto.SequencedMessage; |
| import com.google.protobuf.util.Timestamps; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import java.util.function.Consumer; |
| import java.util.function.Function; |
| import org.apache.beam.sdk.transforms.DoFn.OutputReceiver; |
| import org.apache.beam.sdk.transforms.DoFn.ProcessContinuation; |
| import org.apache.beam.sdk.transforms.splittabledofn.RestrictionTracker; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.Iterables; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.util.concurrent.SettableFuture; |
| import org.joda.time.Duration; |
| import org.joda.time.Instant; |
| |
| class SubscriptionPartitionProcessorImpl extends Listener |
| implements SubscriptionPartitionProcessor { |
| private final RestrictionTracker<OffsetByteRange, OffsetByteProgress> tracker; |
| private final OutputReceiver<SequencedMessage> receiver; |
| private final Subscriber subscriber; |
| private final SettableFuture<Void> completionFuture = SettableFuture.create(); |
| private final FlowControlSettings flowControlSettings; |
| private Optional<Offset> lastClaimedOffset = Optional.empty(); |
| |
| @SuppressWarnings("methodref.receiver.bound.invalid") |
| SubscriptionPartitionProcessorImpl( |
| RestrictionTracker<OffsetByteRange, OffsetByteProgress> tracker, |
| OutputReceiver<SequencedMessage> receiver, |
| Function<Consumer<List<SequencedMessage>>, Subscriber> subscriberFactory, |
| FlowControlSettings flowControlSettings) { |
| this.tracker = tracker; |
| this.receiver = receiver; |
| this.subscriber = subscriberFactory.apply(this::onMessages); |
| this.flowControlSettings = flowControlSettings; |
| } |
| |
| @Override |
| @SuppressWarnings("argument.type.incompatible") |
| public void start() throws CheckedApiException { |
| this.subscriber.addListener(this, SystemExecutors.getFuturesExecutor()); |
| this.subscriber.startAsync(); |
| this.subscriber.awaitRunning(); |
| try { |
| this.subscriber.allowFlow( |
| FlowControlRequest.newBuilder() |
| .setAllowedBytes(flowControlSettings.bytesOutstanding()) |
| .setAllowedMessages(flowControlSettings.messagesOutstanding()) |
| .build()); |
| } catch (Throwable t) { |
| throw ExtractStatus.toCanonical(t); |
| } |
| } |
| |
| private void onMessages(List<SequencedMessage> messages) { |
| if (completionFuture.isDone()) { |
| return; |
| } |
| Offset lastOffset = Offset.of(Iterables.getLast(messages).getCursor().getOffset()); |
| long byteSize = messages.stream().mapToLong(SequencedMessage::getSizeBytes).sum(); |
| if (tracker.tryClaim(OffsetByteProgress.of(lastOffset, byteSize))) { |
| lastClaimedOffset = Optional.of(lastOffset); |
| messages.forEach( |
| message -> |
| receiver.outputWithTimestamp( |
| message, new Instant(Timestamps.toMillis(message.getPublishTime())))); |
| try { |
| subscriber.allowFlow( |
| FlowControlRequest.newBuilder() |
| .setAllowedBytes(byteSize) |
| .setAllowedMessages(messages.size()) |
| .build()); |
| } catch (CheckedApiException e) { |
| completionFuture.setException(e); |
| } |
| } else { |
| completionFuture.set(null); |
| } |
| } |
| |
| @Override |
| public void failed(State from, Throwable failure) { |
| completionFuture.setException(ExtractStatus.toCanonical(failure)); |
| } |
| |
| @Override |
| public void close() { |
| blockingShutdown(subscriber); |
| } |
| |
| @Override |
| @SuppressWarnings("argument.type.incompatible") |
| public ProcessContinuation waitForCompletion(Duration duration) { |
| try { |
| completionFuture.get(duration.getMillis(), TimeUnit.MILLISECONDS); |
| // CompletionFuture set with null when tryClaim returned false. |
| return ProcessContinuation.stop(); |
| } catch (TimeoutException ignored) { |
| // Timed out waiting, yield to the runtime. |
| return ProcessContinuation.resume(); |
| } catch (ExecutionException e) { |
| throw ExtractStatus.toCanonical(e.getCause()).underlying; |
| } catch (Throwable t) { |
| throw ExtractStatus.toCanonical(t).underlying; |
| } |
| } |
| |
| @Override |
| public Optional<Offset> lastClaimed() { |
| return lastClaimedOffset; |
| } |
| } |