mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-11-27 20:59:42 +08:00
WIP: adding SeaweedOutputStream for write
This commit is contained in:
Chris Lu
parent
6ecefad692
commit
f970abf14a
@ -7,9 +7,21 @@
|
||||
<groupId>seaweedfs</groupId>
|
||||
<artifactId>hadoop-client</artifactId>
|
||||
<version>1.0-SNAPSHOT</version>
|
||||
<build>
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-compiler-plugin</artifactId>
|
||||
<configuration>
|
||||
<source>7</source>
|
||||
<target>7</target>
|
||||
</configuration>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
|
||||
<properties>
|
||||
<hadoop.version>2.2.0</hadoop.version>
|
||||
<hadoop.version>3.1.1</hadoop.version>
|
||||
</properties>
|
||||
|
||||
<dependencies>
|
||||
@ -23,6 +35,11 @@
|
||||
<artifactId>client</artifactId>
|
||||
<version>1.0-SNAPSHOT</version>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.apache.hadoop</groupId>
|
||||
<artifactId>hadoop-common</artifactId>
|
||||
<version>${hadoop.version}</version>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
|
||||
</project>
|
||||
|
||||
@ -0,0 +1,323 @@
|
||||
package seaweed.hdfs;
|
||||
|
||||
// adapted from org.apache.hadoop.fs.azurebfs.services.AbfsOutputStream
|
||||
|
||||
import com.google.common.base.Preconditions;
|
||||
import org.apache.hadoop.fs.FSExceptionMessages;
|
||||
import org.apache.hadoop.fs.StreamCapabilities;
|
||||
import org.apache.hadoop.fs.Syncable;
|
||||
import seaweedfs.client.FilerGrpcClient;
|
||||
import seaweedfs.client.FilerProto;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.io.InterruptedIOException;
|
||||
import java.io.OutputStream;
|
||||
import java.util.ArrayList;
|
||||
import java.util.List;
|
||||
import java.util.Locale;
|
||||
import java.util.concurrent.Callable;
|
||||
import java.util.concurrent.ConcurrentLinkedDeque;
|
||||
import java.util.concurrent.ExecutorCompletionService;
|
||||
import java.util.concurrent.Future;
|
||||
import java.util.concurrent.LinkedBlockingQueue;
|
||||
import java.util.concurrent.ThreadPoolExecutor;
|
||||
import java.util.concurrent.TimeUnit;
|
||||
|
||||
public class SeaweedOutputStream extends OutputStream implements Syncable, StreamCapabilities {
|
||||
|
||||
private final FilerGrpcClient filerGrpcClient;
|
||||
private final List<FilerProto.Entry> entries = new ArrayList<>();
|
||||
private final String path;
|
||||
private final int bufferSize;
|
||||
private final int maxConcurrentRequestCount;
|
||||
private final ThreadPoolExecutor threadExecutor;
|
||||
private final ExecutorCompletionService<Void> completionService;
|
||||
private long position;
|
||||
private boolean closed;
|
||||
private boolean supportFlush = true;
|
||||
private volatile IOException lastError;
|
||||
private long lastFlushOffset;
|
||||
private long lastTotalAppendOffset = 0;
|
||||
private byte[] buffer;
|
||||
private int bufferIndex;
|
||||
private ConcurrentLinkedDeque<WriteOperation> writeOperations;
|
||||
|
||||
public SeaweedOutputStream(FilerGrpcClient filerGrpcClient,
|
||||
final String path,
|
||||
final long position,
|
||||
final int bufferSize) {
|
||||
this.filerGrpcClient = filerGrpcClient;
|
||||
this.path = path;
|
||||
this.position = position;
|
||||
this.closed = false;
|
||||
this.lastError = null;
|
||||
this.lastFlushOffset = 0;
|
||||
this.bufferSize = bufferSize;
|
||||
this.buffer = new byte[bufferSize];
|
||||
this.bufferIndex = 0;
|
||||
this.writeOperations = new ConcurrentLinkedDeque<>();
|
||||
|
||||
this.maxConcurrentRequestCount = 4 * Runtime.getRuntime().availableProcessors();
|
||||
|
||||
this.threadExecutor
|
||||
= new ThreadPoolExecutor(maxConcurrentRequestCount,
|
||||
maxConcurrentRequestCount,
|
||||
10L,
|
||||
TimeUnit.SECONDS,
|
||||
new LinkedBlockingQueue<Runnable>());
|
||||
this.completionService = new ExecutorCompletionService<>(this.threadExecutor);
|
||||
|
||||
}
|
||||
|
||||
private synchronized void flushWrittenBytesToServiceInternal(final long offset) throws IOException {
|
||||
try {
|
||||
SeaweedWrite.writeMeta(filerGrpcClient, path, entries);
|
||||
} catch (Exception ex) {
|
||||
throw new IOException(ex);
|
||||
}
|
||||
this.lastFlushOffset = offset;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void write(final int byteVal) throws IOException {
|
||||
write(new byte[]{(byte) (byteVal & 0xFF)});
|
||||
}
|
||||
|
||||
@Override
|
||||
public synchronized void write(final byte[] data, final int off, final int length)
|
||||
throws IOException {
|
||||
maybeThrowLastError();
|
||||
|
||||
Preconditions.checkArgument(data != null, "null data");
|
||||
|
||||
if (off < 0 || length < 0 || length > data.length - off) {
|
||||
throw new IndexOutOfBoundsException();
|
||||
}
|
||||
|
||||
int currentOffset = off;
|
||||
int writableBytes = bufferSize - bufferIndex;
|
||||
int numberOfBytesToWrite = length;
|
||||
|
||||
while (numberOfBytesToWrite > 0) {
|
||||
if (writableBytes <= numberOfBytesToWrite) {
|
||||
System.arraycopy(data, currentOffset, buffer, bufferIndex, writableBytes);
|
||||
bufferIndex += writableBytes;
|
||||
writeCurrentBufferToService();
|
||||
currentOffset += writableBytes;
|
||||
numberOfBytesToWrite = numberOfBytesToWrite - writableBytes;
|
||||
} else {
|
||||
System.arraycopy(data, currentOffset, buffer, bufferIndex, numberOfBytesToWrite);
|
||||
bufferIndex += numberOfBytesToWrite;
|
||||
numberOfBytesToWrite = 0;
|
||||
}
|
||||
|
||||
writableBytes = bufferSize - bufferIndex;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Flushes this output stream and forces any buffered output bytes to be
|
||||
* written out. If any data remains in the payload it is committed to the
|
||||
* service. Data is queued for writing and forced out to the service
|
||||
* before the call returns.
|
||||
*/
|
||||
@Override
|
||||
public void flush() throws IOException {
|
||||
if (supportFlush) {
|
||||
flushInternalAsync();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Similar to posix fsync, flush out the data in client's user buffer
|
||||
* all the way to the disk device (but the disk may have it in its cache).
|
||||
*
|
||||
* @throws IOException if error occurs
|
||||
*/
|
||||
@Override
|
||||
public void hsync() throws IOException {
|
||||
if (supportFlush) {
|
||||
flushInternal();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Flush out the data in client's user buffer. After the return of
|
||||
* this call, new readers will see the data.
|
||||
*
|
||||
* @throws IOException if any error occurs
|
||||
*/
|
||||
@Override
|
||||
public void hflush() throws IOException {
|
||||
if (supportFlush) {
|
||||
flushInternal();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Query the stream for a specific capability.
|
||||
*
|
||||
* @param capability string to query the stream support for.
|
||||
* @return true for hsync and hflush.
|
||||
*/
|
||||
@Override
|
||||
public boolean hasCapability(String capability) {
|
||||
switch (capability.toLowerCase(Locale.ENGLISH)) {
|
||||
case StreamCapabilities.HSYNC:
|
||||
case StreamCapabilities.HFLUSH:
|
||||
return supportFlush;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Force all data in the output stream to be written to Azure storage.
|
||||
* Wait to return until this is complete. Close the access to the stream and
|
||||
* shutdown the upload thread pool.
|
||||
* If the blob was created, its lease will be released.
|
||||
* Any error encountered caught in threads and stored will be rethrown here
|
||||
* after cleanup.
|
||||
*/
|
||||
@Override
|
||||
public synchronized void close() throws IOException {
|
||||
if (closed) {
|
||||
return;
|
||||
}
|
||||
|
||||
try {
|
||||
flushInternal();
|
||||
threadExecutor.shutdown();
|
||||
} finally {
|
||||
lastError = new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
|
||||
buffer = null;
|
||||
bufferIndex = 0;
|
||||
closed = true;
|
||||
writeOperations.clear();
|
||||
if (!threadExecutor.isShutdown()) {
|
||||
threadExecutor.shutdownNow();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private synchronized void writeCurrentBufferToService() throws IOException {
|
||||
if (bufferIndex == 0) {
|
||||
return;
|
||||
}
|
||||
|
||||
final byte[] bytes = buffer;
|
||||
final int bytesLength = bufferIndex;
|
||||
|
||||
buffer = new byte[bufferSize];
|
||||
bufferIndex = 0;
|
||||
final long offset = position;
|
||||
position += bytesLength;
|
||||
|
||||
if (threadExecutor.getQueue().size() >= maxConcurrentRequestCount * 2) {
|
||||
waitForTaskToComplete();
|
||||
}
|
||||
|
||||
final Future<Void> job = completionService.submit(new Callable<Void>() {
|
||||
@Override
|
||||
public Void call() throws Exception {
|
||||
// originally: client.append(path, offset, bytes, 0, bytesLength);
|
||||
FilerProto.Entry entry = SeaweedWrite.writeData(filerGrpcClient, offset, bytes, 0, bytesLength);
|
||||
entries.add(entry);
|
||||
return null;
|
||||
}
|
||||
});
|
||||
|
||||
writeOperations.add(new WriteOperation(job, offset, bytesLength));
|
||||
|
||||
// Try to shrink the queue
|
||||
shrinkWriteOperationQueue();
|
||||
}
|
||||
|
||||
private void waitForTaskToComplete() throws IOException {
|
||||
boolean completed;
|
||||
for (completed = false; completionService.poll() != null; completed = true) {
|
||||
// keep polling until there is no data
|
||||
}
|
||||
|
||||
if (!completed) {
|
||||
try {
|
||||
completionService.take();
|
||||
} catch (InterruptedException e) {
|
||||
lastError = (IOException) new InterruptedIOException(e.toString()).initCause(e);
|
||||
throw lastError;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private void maybeThrowLastError() throws IOException {
|
||||
if (lastError != null) {
|
||||
throw lastError;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Try to remove the completed write operations from the beginning of write
|
||||
* operation FIFO queue.
|
||||
*/
|
||||
private synchronized void shrinkWriteOperationQueue() throws IOException {
|
||||
try {
|
||||
while (writeOperations.peek() != null && writeOperations.peek().task.isDone()) {
|
||||
writeOperations.peek().task.get();
|
||||
lastTotalAppendOffset += writeOperations.peek().length;
|
||||
writeOperations.remove();
|
||||
}
|
||||
} catch (Exception e) {
|
||||
lastError = new IOException(e);
|
||||
throw lastError;
|
||||
}
|
||||
}
|
||||
|
||||
private synchronized void flushInternal() throws IOException {
|
||||
maybeThrowLastError();
|
||||
writeCurrentBufferToService();
|
||||
flushWrittenBytesToService();
|
||||
}
|
||||
|
||||
private synchronized void flushInternalAsync() throws IOException {
|
||||
maybeThrowLastError();
|
||||
writeCurrentBufferToService();
|
||||
flushWrittenBytesToServiceAsync();
|
||||
}
|
||||
|
||||
private synchronized void flushWrittenBytesToService() throws IOException {
|
||||
for (WriteOperation writeOperation : writeOperations) {
|
||||
try {
|
||||
writeOperation.task.get();
|
||||
} catch (Exception ex) {
|
||||
lastError = new IOException(ex);
|
||||
throw lastError;
|
||||
}
|
||||
}
|
||||
flushWrittenBytesToServiceInternal(position);
|
||||
}
|
||||
|
||||
private synchronized void flushWrittenBytesToServiceAsync() throws IOException {
|
||||
shrinkWriteOperationQueue();
|
||||
|
||||
if (this.lastTotalAppendOffset > this.lastFlushOffset) {
|
||||
this.flushWrittenBytesToServiceInternal(this.lastTotalAppendOffset);
|
||||
}
|
||||
}
|
||||
|
||||
private static class WriteOperation {
|
||||
private final Future<Void> task;
|
||||
private final long startOffset;
|
||||
private final long length;
|
||||
|
||||
WriteOperation(final Future<Void> task, final long startOffset, final long length) {
|
||||
Preconditions.checkNotNull(task, "task");
|
||||
Preconditions.checkArgument(startOffset >= 0, "startOffset");
|
||||
Preconditions.checkArgument(length >= 0, "length");
|
||||
|
||||
this.task = task;
|
||||
this.startOffset = startOffset;
|
||||
this.length = length;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
18
other/java/hdfs/src/main/java/seaweed/hdfs/SeaweedWrite.java
Normal file
18
other/java/hdfs/src/main/java/seaweed/hdfs/SeaweedWrite.java
Normal file
@ -0,0 +1,18 @@
|
||||
package seaweed.hdfs;
|
||||
|
||||
import seaweedfs.client.FilerGrpcClient;
|
||||
import seaweedfs.client.FilerProto;
|
||||
|
||||
import java.util.List;
|
||||
|
||||
public class SeaweedWrite {
|
||||
public static FilerProto.Entry writeData(final FilerGrpcClient filerGrpcClient, final long offset,
|
||||
final byte[] bytes, final long bytesOffset, final long bytesLength) {
|
||||
return null;
|
||||
}
|
||||
|
||||
public static void writeMeta(final FilerGrpcClient filerGrpcClient,
|
||||
final String path, final List<FilerProto.Entry> entries) {
|
||||
return;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user