org.xnio.channels.StreamSourceChannel Java Examples

@Override
public void handleEvent(final StreamSourceChannel channel) {
    PooledByteBuffer resource = bufferPool.allocate();
    ByteBuffer buffer = resource.getBuffer();
    try {
        int r = 0;
        do {
            r = channel.read(buffer);
            if (r == 0) {
                return;
            } else if (r == -1) {
                stringDone(string.extract());
                IoUtils.safeClose(channel);
            } else {
                buffer.flip();
                string.write(buffer);
            }
        } while (r > 0);
    } catch (IOException e) {
        error(e);
    } finally {
        resource.close();
    }
}
 

/**
 * Get the inbound request.  If there is no request body, calling this method
 * may cause the next request to immediately be processed.  The {@link StreamSourceChannel#close()} or {@link StreamSourceChannel#shutdownReads()}
 * method must be called at some point after the request is processed to prevent resource leakage and to allow
 * the next request to proceed.  Any unread content will be discarded.
 *
 * @return the channel for the inbound request, or {@code null} if another party already acquired the channel
 */
public StreamSourceChannel getRequestChannel() {
    if (requestChannel != null) {
        if(anyAreSet(state, FLAG_REQUEST_RESET)) {
            state &= ~FLAG_REQUEST_RESET;
            return requestChannel;
        }
        return null;
    }
    if (anyAreSet(state, FLAG_REQUEST_TERMINATED)) {
        return requestChannel = new ReadDispatchChannel(new ConduitStreamSourceChannel(Configurable.EMPTY, new EmptyStreamSourceConduit(getIoThread())));
    }
    final ConduitWrapper<StreamSourceConduit>[] wrappers = this.requestWrappers;
    final ConduitStreamSourceChannel sourceChannel = connection.getSourceChannel();
    if (wrappers != null) {
        this.requestWrappers = null;
        final WrapperConduitFactory<StreamSourceConduit> factory = new WrapperConduitFactory<>(wrappers, requestWrapperCount, sourceChannel.getConduit(), this);
        sourceChannel.setConduit(factory.create());
    }
    return requestChannel = new ReadDispatchChannel(sourceChannel);
}
 

public void read(StreamSourceChannel channel) {
    WritableByteChannel out = Channels.newChannel(body);
    try (PooledByteBuffer poolItem = exchange.getConnection().getByteBufferPool().allocate()) {
        ByteBuffer buffer = poolItem.getBuffer();
        int bytesRead;
        while (true) {
            buffer.clear();
            bytesRead = channel.read(buffer);
            if (bytesRead <= 0) break;
            buffer.flip();
            out.write(buffer);
        }
        if (bytesRead == -1) {
            complete = true;
            exchange.putAttachment(REQUEST_BODY, new RequestBody(body.toByteArray(), null));
        }
    } catch (IOException e) {
        IoUtils.safeClose(channel);
        complete = true;
        exchange.putAttachment(REQUEST_BODY, new RequestBody(null, e));
    }
}
 

@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
    if (exchange.isInIoThread()) {
        exchange.dispatch(this);
        return;
    }
    try {
        if (hasBody(exchange)) {
            RequestBodyParser reader = new RequestBodyParser(exchange, next);
            StreamSourceChannel channel = exchange.getRequestChannel();
            reader.read(channel);
            if (!reader.complete()) {
                channel.getReadSetter().set(reader);
                channel.resumeReads();
                return;
            }
        }
        exchange.dispatch(next);
    } catch (Throwable e) {
        if (exchange.isResponseChannelAvailable()) {
            exchange.setStatusCode(500);
            exchange.getResponseHeaders().add(new HttpString("Content-Type"), "text/plain");
            exchange.getResponseSender().send(Exceptions.stackTrace(e));
        }
    }
}
 

public long transferFrom(final StreamSourceChannel source, final long count, final ByteBuffer throughBuffer) throws IOException {
    if (count == 0L) return 0L;
    long val = state;
    if (allAreSet(val, FLAG_CLOSE_REQUESTED)) {
        throw new ClosedChannelException();
    }
    if (allAreClear(val, MASK_COUNT)) {
        throw new FixedLengthOverflowException();
    }
    long res = 0L;
    try {
        return res = next.transferFrom(source, min(count, (val & MASK_COUNT)), throughBuffer);
    } catch (IOException | RuntimeException | Error e) {
        broken = true;
        throw e;
    } finally {
        exitWrite(val, res);
    }
}
 

@Override
public void parse(final HttpHandler handler) throws Exception {
    if (exchange.getAttachment(FORM_DATA) != null) {
        handler.handleRequest(exchange);
        return;
    }
    this.handler = handler;
    //we need to delegate to a thread pool
    //as we parse with blocking operations

    StreamSourceChannel requestChannel = exchange.getRequestChannel();
    if (requestChannel == null) {
        throw new IOException(UndertowMessages.MESSAGES.requestChannelAlreadyProvided());
    }
    if (executor == null) {
        exchange.dispatch(new NonBlockingParseTask(exchange.getConnection().getWorker(), requestChannel));
    } else {
        exchange.dispatch(executor, new NonBlockingParseTask(executor, requestChannel));
    }
}
 

public void setup(final StreamSourceChannel channel) {
    PooledByteBuffer resource = bufferPool.allocate();
    ByteBuffer buffer = resource.getBuffer();
    try {
        int r = 0;
        do {
            r = channel.read(buffer);
            if (r == 0) {
                channel.getReadSetter().set(this);
                channel.resumeReads();
            } else if (r == -1) {
                stringDone(string.extract());
                IoUtils.safeClose(channel);
            } else {
                buffer.flip();
                string.write(buffer);
            }
        } while (r > 0);
    } catch (IOException e) {
        error(e);
    } finally {
        resource.close();
    }
}
 

@Override
public FormData parseBlocking() throws IOException {
    final FormData existing = exchange.getAttachment(FORM_DATA);
    if (existing != null) {
        return existing;
    }

    StreamSourceChannel channel = exchange.getRequestChannel();
    if (channel == null) {
        throw new IOException(UndertowMessages.MESSAGES.requestChannelAlreadyProvided());
    } else {
        while (state != 4) {
            doParse(channel);
            if (state != 4) {
                channel.awaitReadable();
            }
        }
    }
    return data;
}
 

@Override
public void parse(HttpHandler handler) throws Exception {
    if (exchange.getAttachment(FORM_DATA) != null) {
        handler.handleRequest(exchange);
        return;
    }
    this.handler = handler;
    StreamSourceChannel channel = exchange.getRequestChannel();
    if (channel == null) {
        throw new IOException(UndertowMessages.MESSAGES.requestChannelAlreadyProvided());
    } else {
        doParse(channel);
        if (state != 4) {
            channel.getReadSetter().set(this);
            channel.resumeReads();
        } else {
            exchange.dispatch(SameThreadExecutor.INSTANCE, handler);
        }
    }
}
 

private static <I extends StreamSourceChannel, O extends StreamSinkChannel> void done(I source, O sink, ChannelListener<? super I> sourceListener, ChannelListener<? super O> sinkListener) {
    Channels.setReadListener(source, sourceListener);
    if (sourceListener == null) {
        source.suspendReads();
    } else {
        source.wakeupReads();
    }

    Channels.setWriteListener(sink, sinkListener);
    if (sinkListener == null) {
        sink.suspendWrites();
    } else {
        sink.wakeupWrites();
    }
}
 

public void handleEvent(StreamSourceChannel channel) {
    PooledByteBuffer resource = this.bufferPool.allocate();
    ByteBuffer buffer = resource.getBuffer();

    try {
        int r;
        do {
            r = channel.read(buffer);
            if (r == 0) {
                return;
            }
            if (r == -1) {
                this.bufferDone(this.result);
                IoUtils.safeClose(channel);
            } else {
                buffer.flip();
                ByteBuffer[] buffs = new ByteBuffer[]{buffer};;
                for(int i = 0; i < buffs.length; ++i) {
                    ByteBuffer buf = buffs[i];
                    while(buf.hasRemaining()) {
                        result.add(buf.get());
                    }
                }
            }
        } while(r > 0);
    } catch (IOException var8) {
        this.error(var8);
    } finally {
        resource.close();
    }

}
 

public long transferFrom(final StreamSourceChannel source, final long count, final ByteBuffer throughBuffer) throws IOException {
    try {
        if (state != 0) {
            return IoUtils.transfer(source, count, throughBuffer, new ConduitWritableByteChannel(this));
        } else {
            return next.transferFrom(source, count, throughBuffer);
        }
    } catch (IOException| RuntimeException | Error e) {
        IoUtils.safeClose(connection);
        throw e;
    }
}
 

private void waitForEndOfStream(final StreamSourceChannel channel) {
    // So we have to supply a buffer to detect EOF.
    // This is a corner case, and some alternatives are inappropriate:
    //  - A singleton 1-byte buffer will lead to contention if multiple clients are in this state.
    //  - A zero-byte buffer can't be used because the semantics for reading from it aren't properly
    //    defined.
    final ByteBuffer tinyBuffer = ByteBuffer.allocate(1);
    try {
        final int numRead = channel.read(tinyBuffer);
        switch (numRead) {
            case -1:
                // End-of-stream. Phew.
                endOfFile(channel);
                break;
            case 0:
                // Not yet sure; keep waiting.
                channel.resumeReads();
                break;
            default:
                // Overflow. Doh.
                channel.getReadSetter().set(null);
                completionHandler.overflow();
        }
    } catch (final IOException e) {
        onFailure(channel, e);
    }
}
 

@Override
public long transferFrom(final StreamSourceChannel source, final long count, final ByteBuffer throughBuffer) throws IOException {
    if (anyAreSet(state, FLAG_WRITES_SHUTDOWN)) {
        throw new ClosedChannelException();
    }
    return IoUtils.transfer(source, count, throughBuffer, new ConduitWritableByteChannel(this));
}
 

@Override
public void handleEvent(StreamSourceChannel channel) {
    read(channel);
    if (complete) {
        exchange.dispatch(handler);
    }
}
 

@Override
public long transferFrom(final StreamSourceChannel source, final long count, final ByteBuffer throughBuffer) throws IOException {
    if (anyAreSet(state, SHUTDOWN | CLOSED)) {
        throw new ClosedChannelException();
    }
    if (!performFlushIfRequired()) {
        return 0;
    }
    return IoUtils.transfer(source, count, throughBuffer, new ConduitWritableByteChannel(this));
}
 

public static void fill(final StreamSourceChannel channel,
                        final int initialChunkCount,
                        final int maxChunkCount,
                        final CompletionHandler completionHandler) {
    final ChunkyByteBuffer buffer = new ChunkyByteBuffer(initialChunkCount, maxChunkCount, completionHandler);
    buffer.fillBuffers(channel, c -> {
        c.getReadSetter().set(d -> buffer.fillBuffers(d, null));
        c.resumeReads();
    });
}
 

@Override
public long transferFrom(StreamSourceChannel source, long count, ByteBuffer throughBuffer) throws IOException {
    if(anyAreSet(state, FLAG_WRITE_SHUTDOWN)) {
        throw new ClosedChannelException();
    }
    return IoUtils.transfer(source, count, throughBuffer, new ConduitWritableByteChannel(this));
}
 

@Override
public long transferFrom(final StreamSourceChannel source, final long count, final ByteBuffer throughBuffer) throws IOException {
    if (anyAreSet(state, FLAG_CLOSE_COMPLETE)) {
        throw new ClosedChannelException();
    }
    return IoUtils.transfer(source, count, throughBuffer, new ConduitWritableByteChannel(this));
}
 

@Override
public void handleEvent(StreamSourceChannel channel) {
    read(channel);
    if (complete) {
        exchange.dispatch(handler);
    }
}
 

@Override
public long transferFrom(final StreamSourceChannel source, final long count, final ByteBuffer throughBuffer) throws IOException {
    if (anyAreSet(state, FLAG_WRITES_SHUTDOWN)) {
        throw new ClosedChannelException();
    }
    return IoUtils.transfer(source, count, throughBuffer, new ConduitWritableByteChannel(this));
}
 

@SuppressWarnings({"unchecked", "rawtypes"})
@Override
public void handleEvent(final StreamSourceChannel channel) {
    //clear the task queue before reading
    while (!taskRunQueue.isEmpty()) {
        taskRunQueue.poll().run();
    }

    final R receiver = AbstractFramedChannel.this.receiver;
    if ((readChannelDone || receivesSuspended) && receiver == null) {
        channel.suspendReads();
        return;
    } else {
        ChannelListener listener = receiveSetter.get();
        if(listener == null) {
            listener = DRAIN_LISTENER;
        }
        UndertowLogger.REQUEST_IO_LOGGER.tracef("Invoking receive listener", receiver);
        ChannelListeners.invokeChannelListener(AbstractFramedChannel.this, listener);
    }
    if (readData != null  && !readData.isFreed() && channel.isOpen()) {
        try {
            runInIoThread(new Runnable() {
                @Override
                public void run() {
                    ChannelListeners.invokeChannelListener(channel, FrameReadListener.this);
                }
            });
        } catch (RejectedExecutionException e) {
            IoUtils.safeClose(AbstractFramedChannel.this);
        }
    }
}
 

@Override
public long transferFrom(StreamSourceChannel source, long count, ByteBuffer throughBuffer) throws IOException {
    if (!canSend()) {
        return 0;
    }
    int bytes = this.bytes - this.byteCount;
    long written = super.transferFrom(source, Math.min(count, bytes), throughBuffer);
    handleWritten(written);
    return written;
}
 

@Override
public void handleEvent(final StreamSourceChannel channel) {
    try {
        doParse(channel);
        if (state == 4) {
            exchange.dispatch(SameThreadExecutor.INSTANCE, handler);
        }
    } catch (IOException e) {
        IoUtils.safeClose(channel);
        UndertowLogger.REQUEST_IO_LOGGER.ioExceptionReadingFromChannel(e);
        exchange.endExchange();

    }
}
 

public void setup(StreamSourceChannel channel) {
    PooledByteBuffer resource = this.bufferPool.allocate();
    ByteBuffer buffer = resource.getBuffer();

    try {
        int r;
        do {
            r = channel.read(buffer);
            if (r == 0) {
                channel.getReadSetter().set(this);
                channel.resumeReads();
            } else if (r == -1) {
                this.bufferDone(this.result);
                IoUtils.safeClose(channel);
            } else {
                buffer.flip();
                ByteBuffer[] buffs = new ByteBuffer[]{buffer};
                for(int i = 0; i < buffs.length; ++i) {
                    ByteBuffer buf = buffs[i];
                    while(buf.hasRemaining()) {
                        result.add(buf.get());
                    }
                }
            }
        } while(r > 0);
    } catch (IOException var8) {
        this.error(var8);
    } finally {
        resource.close();
    }

}
 

public void handleEvent(final StreamSourceChannel channel) {
    ChannelListener<? super StreamSourceChannel> channelListener = setter.get();
    if(channelListener != null) {
        ChannelListeners.invokeChannelListener(this.channel, channelListener);
    } else {
        UndertowLogger.REQUEST_LOGGER.debugf("suspending reads on %s to prevent listener runaway", channel);
        channel.suspendReads();
    }
}
 

@Override
public long transferFrom(final StreamSourceChannel source, final long count, final ByteBuffer throughBuffer) throws IOException {
    if (isFinished()) {
        throw UndertowMessages.MESSAGES.channelIsClosed();
    }
    return delegate.transferFrom(source, count, throughBuffer);
}
 

@Override
public long transferFrom(StreamSourceChannel source, long count, ByteBuffer throughBuffer) throws IOException {
    long l = super.transferFrom(source, count, throughBuffer);
    if(l > 0) {
        responseBytesSent += l;
    }
    return l;
}
 

public ChannelListener.Setter<? extends StreamSourceChannel> getCloseSetter() {
    if (closeSetter == null) {
        closeSetter = new ChannelListener.SimpleSetter<>();
        if (!isFinished()) {
            if(delegate instanceof ConduitStreamSourceChannel) {
                ((ConduitStreamSourceChannel)delegate).setCloseListener(ChannelListeners.delegatingChannelListener(this, closeSetter));
            } else {
                delegate.getCloseSetter().set(ChannelListeners.delegatingChannelListener(this, closeSetter));
            }
        }
    }
    return closeSetter;
}
 

public ChannelListener.Setter<? extends StreamSourceChannel> getReadSetter() {
    if (readSetter == null) {
        readSetter = new ChannelListener.SimpleSetter<>();
        if (!isFinished()) {
            if(delegate instanceof ConduitStreamSourceChannel) {
                ((ConduitStreamSourceChannel)delegate).setReadListener(new SetterDelegatingListener((ChannelListener.SimpleSetter)readSetter, this));
            } else {
                delegate.getReadSetter().set(new SetterDelegatingListener((ChannelListener.SimpleSetter)readSetter, this));
            }
        }
    }
    return readSetter;
}