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Fix a bug where ChunkedWriteHandler stalls

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- Other encoders in the pipeline were swallowing the flush request.
- Do not allocate a new buffer unnecessarily in ChunkedNioFile
This commit is contained in:
Trustin Lee 2012-06-11 11:23:09 +09:00
parent 9dce123938
commit 89444ef4ec
5 changed files with 44 additions and 29 deletions
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3
codec/src/main/java/io/netty/handler/codec/ByteToByteEncoder.java
View File

@ -46,8 +46,9 @@ public abstract class ByteToByteEncoder extends ChannelOutboundByteHandlerAdapte
if (out.readableBytes() > oldOutSize) {
in.discardReadBytes();
ctx.flush(future);
}
ctx.flush(future);
}
public abstract void encode(ChannelHandlerContext ctx, ByteBuf in, ByteBuf out) throws Exception;

7
codec/src/main/java/io/netty/handler/codec/MessageToByteEncoder.java
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@ -29,8 +29,6 @@ public abstract class MessageToByteEncoder<I> extends ChannelOutboundMessageHand
Queue<I> in = ctx.outboundMessageBuffer();
ByteBuf out = ctx.nextOutboundByteBuffer();
boolean notify = false;
int oldOutSize = out.readableBytes();
for (;;) {
Object msg = in.poll();
if (msg == null) {
@ -39,7 +37,6 @@ public abstract class MessageToByteEncoder<I> extends ChannelOutboundMessageHand
if (!isEncodable(msg)) {
ctx.nextOutboundMessageBuffer().add(msg);
notify = true;
continue;
}
@ -56,9 +53,7 @@ public abstract class MessageToByteEncoder<I> extends ChannelOutboundMessageHand
}
}
if (out.readableBytes() > oldOutSize || notify) {
ctx.flush(future);
}
ctx.flush(future);
}
/**

10
codec/src/main/java/io/netty/handler/codec/MessageToMessageEncoder.java
View File

@ -26,7 +26,6 @@ public abstract class MessageToMessageEncoder<I, O> extends ChannelOutboundMessa
@Override
public void flush(ChannelHandlerContext ctx, ChannelFuture future) throws Exception {
Queue<I> in = ctx.outboundMessageBuffer();
boolean notify = false;
for (;;) {
try {
Object msg = in.poll();
@ -36,7 +35,6 @@ public abstract class MessageToMessageEncoder<I, O> extends ChannelOutboundMessa
if (!isEncodable(msg)) {
ctx.nextOutboundMessageBuffer().add(msg);
notify = true;
continue;
}
@ -49,9 +47,7 @@ public abstract class MessageToMessageEncoder<I, O> extends ChannelOutboundMessa
continue;
}
if (CodecUtil.unfoldAndAdd(ctx, omsg, false)) {
notify = true;
}
CodecUtil.unfoldAndAdd(ctx, omsg, false);
} catch (Throwable t) {
if (t instanceof CodecException) {
ctx.fireExceptionCaught(t);
@ -61,9 +57,7 @@ public abstract class MessageToMessageEncoder<I, O> extends ChannelOutboundMessa
}
}
if (notify) {
ctx.flush(future);
}
ctx.flush(future);
}
/**

7
handler/src/main/java/io/netty/handler/stream/ChunkedNioFile.java
View File

@ -20,7 +20,6 @@ import io.netty.buffer.ByteBuf;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
/**
@ -148,11 +147,9 @@ public class ChunkedNioFile implements ChunkedByteInput {
}
int chunkSize = (int) Math.min(this.chunkSize, endOffset - offset);
byte[] chunkArray = new byte[chunkSize];
ByteBuffer chunk = ByteBuffer.wrap(chunkArray);
int readBytes = 0;
for (;;) {
int localReadBytes = in.read(chunk);
int localReadBytes = buffer.writeBytes(in, chunkSize - readBytes);
if (localReadBytes < 0) {
break;
}
@ -161,8 +158,6 @@ public class ChunkedNioFile implements ChunkedByteInput {
break;
}
}
chunk.flip();
buffer.writeBytes(chunk);
this.offset += readBytes;
return true;

46
handler/src/main/java/io/netty/handler/stream/ChunkedWriteHandler.java
View File

@ -71,21 +71,33 @@ public class ChunkedWriteHandler
private static final InternalLogger logger =
InternalLoggerFactory.getInstance(ChunkedWriteHandler.class);
private static final int MAX_PENDING_WRITES = 4;
private final MessageBuf<Object> queue = MessageBufs.buffer();
private final int maxPendingWrites;
private volatile ChannelHandlerContext ctx;
private final AtomicInteger pendingWrites = new AtomicInteger();
private Object currentEvent;
public ChunkedWriteHandler() {
this(4);
}
public ChunkedWriteHandler(int maxPendingWrites) {
if (maxPendingWrites <= 0) {
throw new IllegalArgumentException(
"maxPendingWrites: " + maxPendingWrites + " (expected: > 0)");
}
this.maxPendingWrites = maxPendingWrites;
}
@Override
public MessageBuf<Object> newOutboundBuffer(ChannelHandlerContext ctx) throws Exception {
this.ctx = ctx;
return queue;
}
private boolean isWritable() {
return pendingWrites.get() < MAX_PENDING_WRITES;
return pendingWrites.get() < maxPendingWrites;
}
/**
@ -136,9 +148,10 @@ public class ChunkedWriteHandler
super.channelInactive(ctx);
}
private void discard(final ChannelHandlerContext ctx, final Throwable cause) {
private void discard(final ChannelHandlerContext ctx, Throwable cause) {
boolean fireExceptionCaught = false;
boolean success = true;
for (;;) {
Object currentEvent = this.currentEvent;
@ -153,10 +166,27 @@ public class ChunkedWriteHandler
}
if (currentEvent instanceof ChunkedInput) {
closeInput((ChunkedInput<?>) currentEvent);
ChunkedInput<?> in = (ChunkedInput<?>) currentEvent;
try {
if (!in.isEndOfInput()) {
success = false;
}
} catch (Exception e) {
success = false;
logger.warn(ChunkedInput.class.getSimpleName() + ".isEndOfInput() failed", e);
}
closeInput(in);
} else if (currentEvent instanceof ChannelFuture) {
fireExceptionCaught = true;
((ChannelFuture) currentEvent).setFailure(cause);
ChannelFuture f = (ChannelFuture) currentEvent;
if (!success) {
fireExceptionCaught = true;
if (cause == null) {
cause = new ClosedChannelException();
}
f.setFailure(cause);
} else {
f.setSuccess();
}
}
}
@ -168,7 +198,7 @@ public class ChunkedWriteHandler
private void doFlush(final ChannelHandlerContext ctx) throws Exception {
Channel channel = ctx.channel();
if (!channel.isActive()) {
discard(ctx, new ClosedChannelException());
discard(ctx, null);
return;
}
while (isWritable()) {