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new a0c98f84e [WIP][core] Introduce AsyncPositionOutputStream
a0c98f84e is described below
commit a0c98f84edb7412e5ef684c836afb4718a7fab17
Author: Jingsong Lee <[email protected]>
AuthorDate: Fri Aug 2 13:22:29 2024 +0800
[WIP][core] Introduce AsyncPositionOutputStream
---
.../paimon/fs/AsyncPositionOutputStream.java | 168 +++++++++++++++++++++
.../org/apache/paimon/io/SingleFileWriter.java | 3 +-
2 files changed, 170 insertions(+), 1 deletion(-)
diff --git
a/paimon-common/src/main/java/org/apache/paimon/fs/AsyncPositionOutputStream.java
b/paimon-common/src/main/java/org/apache/paimon/fs/AsyncPositionOutputStream.java
new file mode 100644
index 000000000..b03f7d14d
--- /dev/null
+++
b/paimon-common/src/main/java/org/apache/paimon/fs/AsyncPositionOutputStream.java
@@ -0,0 +1,168 @@
+/*
+ * 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.paimon.fs;
+
+import java.io.IOException;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.apache.paimon.utils.ThreadUtils.newDaemonThreadFactory;
+
+/** A {@link PositionOutputStream} which uses a async thread to write data. */
+public class AsyncPositionOutputStream extends PositionOutputStream {
+
+ public static final ExecutorService EXECUTOR_SERVICE =
+
Executors.newCachedThreadPool(newDaemonThreadFactory("AsyncOutputStream"));
+
+ private final PositionOutputStream out;
+ private final LinkedBlockingQueue<AsyncEvent> eventQueue;
+ private final AtomicReference<Throwable> exception;
+ private final Future<?> future;
+
+ private volatile boolean isClosed;
+ private long position;
+
+ public AsyncPositionOutputStream(PositionOutputStream out) {
+ this.out = out;
+ this.eventQueue = new LinkedBlockingQueue<>();
+ this.exception = new AtomicReference<>();
+ this.isClosed = false;
+ this.position = 0;
+ this.future = EXECUTOR_SERVICE.submit(this::execute);
+ }
+
+ private void execute() {
+ try {
+ doWork();
+ } catch (Throwable e) {
+ exception.set(e);
+ throw new RuntimeException(e);
+ }
+ }
+
+ private void doWork() throws InterruptedException, IOException {
+ try {
+ while (!isClosed) {
+ AsyncEvent event = eventQueue.poll(1, TimeUnit.SECONDS);
+ if (event == null) {
+ continue;
+ }
+ if (event instanceof EndEvent) {
+ return;
+ }
+ if (event instanceof DataEvent) {
+ DataEvent dataEvent = (DataEvent) event;
+ out.write(dataEvent.data);
+ }
+ if (event instanceof FlushEvent) {
+ out.flush();
+ }
+ }
+ } finally {
+ out.close();
+ }
+ }
+
+ @Override
+ public long getPos() throws IOException {
+ checkException();
+ return position;
+ }
+
+ @Override
+ public void write(int b) throws IOException {
+ checkException();
+ position++;
+ putEvent(new DataEvent(new byte[] {(byte) b}, 0, 1));
+ }
+
+ @Override
+ public void write(byte[] b) throws IOException {
+ checkException();
+ position += b.length;
+ putEvent(new DataEvent(b, 0, b.length));
+ }
+
+ @Override
+ public void write(byte[] b, int off, int len) throws IOException {
+ checkException();
+ position += len;
+ putEvent(new DataEvent(b, off, len));
+ }
+
+ @Override
+ public void flush() throws IOException {
+ checkException();
+ putEvent(new FlushEvent());
+ }
+
+ @Override
+ public void close() throws IOException {
+ checkException();
+ putEvent(new EndEvent());
+ try {
+ this.future.get();
+ } catch (InterruptedException e) {
+ Thread.currentThread().interrupt();
+ throw new RuntimeException(e);
+ } catch (ExecutionException e) {
+ throw new RuntimeException(e);
+ } finally {
+ isClosed = true;
+ }
+ }
+
+ private void putEvent(AsyncEvent event) {
+ try {
+ eventQueue.put(event);
+ } catch (InterruptedException e) {
+ Thread.currentThread().interrupt();
+ throw new RuntimeException(e);
+ }
+ }
+
+ private void checkException() throws IOException {
+ Throwable throwable = exception.get();
+ if (throwable != null) {
+ throw new IOException(throwable);
+ }
+ }
+
+ private interface AsyncEvent {}
+
+ private static class DataEvent implements AsyncEvent {
+
+ private final byte[] data;
+
+ public DataEvent(byte[] input, int offset, int length) {
+ byte[] data = new byte[length];
+ System.arraycopy(input, offset, data, 0, length);
+ this.data = data;
+ }
+ }
+
+ private static class FlushEvent implements AsyncEvent {}
+
+ private static class EndEvent implements AsyncEvent {}
+}
diff --git
a/paimon-core/src/main/java/org/apache/paimon/io/SingleFileWriter.java
b/paimon-core/src/main/java/org/apache/paimon/io/SingleFileWriter.java
index 6d72106d6..759fdb689 100644
--- a/paimon-core/src/main/java/org/apache/paimon/io/SingleFileWriter.java
+++ b/paimon-core/src/main/java/org/apache/paimon/io/SingleFileWriter.java
@@ -21,6 +21,7 @@ package org.apache.paimon.io;
import org.apache.paimon.data.InternalRow;
import org.apache.paimon.format.FormatWriter;
import org.apache.paimon.format.FormatWriterFactory;
+import org.apache.paimon.fs.AsyncPositionOutputStream;
import org.apache.paimon.fs.FileIO;
import org.apache.paimon.fs.Path;
import org.apache.paimon.fs.PositionOutputStream;
@@ -64,7 +65,7 @@ public abstract class SingleFileWriter<T, R> implements
FileWriter<T, R> {
this.converter = converter;
try {
- out = fileIO.newOutputStream(path, false);
+ out = new AsyncPositionOutputStream(fileIO.newOutputStream(path,
false));
writer = factory.create(out, compression);
} catch (IOException e) {
LOG.warn(
