org.apache.hudi.common.util.queue.BoundedInMemoryExecutor Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.hudi.common.util.queue;
import org.apache.hudi.common.util.DefaultSizeEstimator;
import org.apache.hudi.common.util.Option;
import org.apache.hudi.common.util.SizeEstimator;
import org.apache.hudi.exception.HoodieException;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.function.Function;
/**
* Executor which orchestrates concurrent producers and consumers communicating through 'BoundedInMemoryQueue'. This
* class takes as input the size limit, queue producer(s), consumer and transformer and exposes API to orchestrate
* concurrent execution of these actors communicating through a central bounded queue
*/
public class BoundedInMemoryExecutor extends BaseHoodieQueueBasedExecutor {
private static final Logger LOG = LogManager.getLogger(BoundedInMemoryExecutor.class);
public BoundedInMemoryExecutor(final long bufferLimitInBytes, final Iterator inputItr,
HoodieConsumer consumer, Function transformFunction, Runnable preExecuteRunnable) {
this(bufferLimitInBytes, Collections.singletonList(new IteratorBasedQueueProducer<>(inputItr)),
Option.of(consumer), transformFunction, new DefaultSizeEstimator<>(), preExecuteRunnable);
}
public BoundedInMemoryExecutor(final long bufferLimitInBytes, List> producers,
Option> consumer, final Function transformFunction,
final SizeEstimator sizeEstimator, Runnable preExecuteRunnable) {
super(producers, consumer, new BoundedInMemoryQueue<>(bufferLimitInBytes, transformFunction, sizeEstimator), preExecuteRunnable);
}
@Override
protected void doConsume(HoodieMessageQueue queue, HoodieConsumer consumer) {
LOG.info("Starting consumer, consuming records from the queue");
try {
Iterator it = ((BoundedInMemoryQueue) queue).iterator();
while (it.hasNext()) {
consumer.consume(it.next());
}
LOG.info("All records from the queue have been consumed");
} catch (Exception e) {
LOG.error("Failed consuming records", e);
queue.markAsFailed(e);
throw new HoodieException(e);
}
}
public Iterator getRecordIterator() {
return ((BoundedInMemoryQueue) queue).iterator();
}
}