113 lines
3.7 KiB
Java
113 lines
3.7 KiB
Java
package org.warp.commonutils.batch;
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import java.util.concurrent.CompletionException;
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import java.util.concurrent.RejectedExecutionException;
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import java.util.concurrent.TimeUnit;
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import java.util.function.BiConsumer;
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import java.util.function.Consumer;
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import org.warp.commonutils.concurrency.executor.BoundedExecutorService;
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import org.warp.commonutils.functional.TriConsumer;
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import org.warp.commonutils.type.IntWrapper;
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import org.warp.commonutils.type.ShortNamedThreadFactory;
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import org.warp.commonutils.type.VariableWrapper;
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public class ParallelUtils {
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public static <K, V> void parallelize(Consumer<BiConsumer<K, V>> iterator,
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int maxQueueSize,
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int parallelism,
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int groupSize, BiConsumer<K, V> consumer) {
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var parallelExecutor = BoundedExecutorService.create(maxQueueSize,
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parallelism,
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parallelism,
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0,
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TimeUnit.MILLISECONDS,
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new ShortNamedThreadFactory("ForEachParallel"),
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(a, b) -> {}
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);
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final int CHUNK_SIZE = groupSize;
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IntWrapper count = new IntWrapper(CHUNK_SIZE);
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VariableWrapper<Object[]> keys = new VariableWrapper<>(new Object[CHUNK_SIZE]);
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VariableWrapper<Object[]> values = new VariableWrapper<>(new Object[CHUNK_SIZE]);
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iterator.accept((key, value) -> {
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keys.var[CHUNK_SIZE - count.var] = key;
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values.var[CHUNK_SIZE - count.var] = value;
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count.var--;
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if (count.var == 0) {
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count.var = CHUNK_SIZE;
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Object[] keysCopy = keys.var;
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Object[] valuesCopy = values.var;
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keys.var = new Object[CHUNK_SIZE];
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values.var = new Object[CHUNK_SIZE];
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try {
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parallelExecutor.execute(() -> {
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for (int i = 0; i < CHUNK_SIZE; i++) {
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//noinspection unchecked
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consumer.accept((K) keysCopy[i], (V) valuesCopy[i]);
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}
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});
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} catch (RejectedExecutionException e) {
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throw new CompletionException(e);
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}
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}
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});
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parallelExecutor.shutdown();
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try {
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parallelExecutor.awaitTermination(Integer.MAX_VALUE, TimeUnit.DAYS);
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} catch (InterruptedException e) {
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throw new RuntimeException("Parallel forEach interrupted", e);
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}
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}
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public static <K1, K2, V> void parallelize(Consumer<TriConsumer<K1, K2, V>> iterator,
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int maxQueueSize,
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int parallelism,
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int groupSize,
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TriConsumer<K1, K2, V> consumer) {
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var parallelExecutor = BoundedExecutorService.create(maxQueueSize,
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parallelism,
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parallelism,
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0,
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TimeUnit.MILLISECONDS,
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new ShortNamedThreadFactory("ForEachParallel"),
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(a, b) -> {}
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);
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final int CHUNK_SIZE = groupSize;
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IntWrapper count = new IntWrapper(CHUNK_SIZE);
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VariableWrapper<Object[]> keys1 = new VariableWrapper<>(new Object[CHUNK_SIZE]);
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VariableWrapper<Object[]> keys2 = new VariableWrapper<>(new Object[CHUNK_SIZE]);
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VariableWrapper<Object[]> values = new VariableWrapper<>(new Object[CHUNK_SIZE]);
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iterator.accept((key1, key2, value) -> {
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keys1.var[CHUNK_SIZE - count.var] = key1;
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keys2.var[CHUNK_SIZE - count.var] = key2;
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values.var[CHUNK_SIZE - count.var] = value;
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count.var--;
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if (count.var == 0) {
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count.var = CHUNK_SIZE;
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Object[] keys1Copy = keys1.var;
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Object[] keys2Copy = keys2.var;
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Object[] valuesCopy = values.var;
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keys1.var = new Object[CHUNK_SIZE];
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keys2.var = new Object[CHUNK_SIZE];
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values.var = new Object[CHUNK_SIZE];
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try {
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parallelExecutor.execute(() -> {
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for (int i = 0; i < CHUNK_SIZE; i++) {
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//noinspection unchecked
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consumer.accept((K1) keys1Copy[i], (K2) keys2Copy[i], (V) valuesCopy[i]);
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}
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});
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} catch (RejectedExecutionException e) {
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throw new CompletionException(e);
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}
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}
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});
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parallelExecutor.shutdown();
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try {
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parallelExecutor.awaitTermination(Integer.MAX_VALUE, TimeUnit.DAYS);
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} catch (InterruptedException e) {
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throw new RuntimeException("Parallel forEach interrupted", e);
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}
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}
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}
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