Example usage for io.netty.buffer ByteBuf isReadable

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf isReadable.

Prototype

public abstract boolean isReadable();

Source Link

Document

Returns true if and only if (this.writerIndex - this.readerIndex) is greater than 0 .

Usage

From source file:io.vertx.core.http.impl.Http2ConnectionBase.java

License:Open Source License

/**
 * Return a buffer from HTTP/2 codec that Vert.x can use:
 *
 * - if it's a direct buffer (coming likely from OpenSSL) : we get a heap buffer version
 * - if it's a composite buffer we do the same
 * - otherwise we increase the ref count
 *///from   w  w w  .j  a  v a  2  s.c  om
static ByteBuf safeBuffer(ByteBuf buf, ByteBufAllocator allocator) {
    if (buf == Unpooled.EMPTY_BUFFER) {
        return buf;
    }
    if (buf.isDirect() || buf instanceof CompositeByteBuf) {
        if (buf.isReadable()) {
            ByteBuf buffer = allocator.heapBuffer(buf.readableBytes());
            buffer.writeBytes(buf);
            return buffer;
        } else {
            return Unpooled.EMPTY_BUFFER;
        }
    }
    return buf.retain();
}

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From source file:io.vertx.core.http.impl.HttpServerResponseImpl.java

License:Open Source License

private void end0(ByteBuf data) {
    checkWritten();/*from  ww w.j a  va  2 s.c  o m*/
    bytesWritten += data.readableBytes();
    if (!headWritten) {
        // if the head was not written yet we can write out everything in one go
        // which is cheaper.
        prepareHeaders();
        FullHttpResponse resp;
        if (trailing != null) {
            resp = new AssembledFullHttpResponse(response, data, trailing.trailingHeaders(),
                    trailing.getDecoderResult());
        } else {
            resp = new AssembledFullHttpResponse(response, data);
        }
        channelFuture = conn.writeToChannel(resp);
    } else {
        if (!data.isReadable()) {
            if (trailing == null) {
                channelFuture = conn.writeToChannel(LastHttpContent.EMPTY_LAST_CONTENT);
            } else {
                channelFuture = conn.writeToChannel(trailing);
            }
        } else {
            LastHttpContent content;
            if (trailing != null) {
                content = new AssembledLastHttpContent(data, trailing.trailingHeaders(),
                        trailing.getDecoderResult());
            } else {
                content = new DefaultLastHttpContent(data, false);
            }
            channelFuture = conn.writeToChannel(content);
        }
    }

    if (!keepAlive) {
        closeConnAfterWrite();
        closed = true;
    }
    written = true;
    conn.responseComplete();
    if (bodyEndHandler != null) {
        bodyEndHandler.handle(null);
    }
    if (endHandler != null) {
        endHandler.handle(null);
    }
}

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From source file:io.vertx.core.net.impl.VertxHandler.java

License:Open Source License

public static ByteBuf safeBuffer(ByteBuf buf, ByteBufAllocator allocator) {
    if (buf == Unpooled.EMPTY_BUFFER) {
        return buf;
    }//from   ww  w  .  jav a 2  s  .  co  m
    if (buf.isDirect() || buf instanceof CompositeByteBuf) {
        try {
            if (buf.isReadable()) {
                ByteBuf buffer = allocator.heapBuffer(buf.readableBytes());
                buffer.writeBytes(buf);
                return buffer;
            } else {
                return Unpooled.EMPTY_BUFFER;
            }
        } finally {
            buf.release();
        }
    }
    return buf;
}

---

From source file:io.vertx.proton.impl.ProtonTransport.java

License:Apache License

private void pumpInbound(Buffer buffer) {
    if (failed) {
        LOG.trace("Skipping processing of data following transport error: {0}", buffer);
        return;//from  ww w  .  ja  v  a2s  .  c  om
    }

    // Lets push bytes from vert.x to proton engine.
    try {
        ByteBuf data = buffer.getByteBuf();
        do {
            ByteBuffer transportBuffer = transport.tail();

            int amount = Math.min(transportBuffer.remaining(), data.readableBytes());
            transportBuffer.limit(transportBuffer.position() + amount);
            data.readBytes(transportBuffer);

            transport.process();
        } while (data.isReadable());
    } catch (Exception te) {
        failed = true;
        LOG.trace("Exception while processing transport input", te);
    }
}

---

From source file:itlab.teleport.HttpServerHandler.java

License:Apache License

@Override
public void channelRead0(ChannelHandlerContext ctx, Object msg) throws SQLException, IOException {
    if (msg instanceof FullHttpRequest) {
        HttpRequest req = (HttpRequest) msg;
        final HttpPostRequestDecoder decoder = new HttpPostRequestDecoder(new DefaultHttpDataFactory(false),
                req);/* w  w w  .j  a v  a  2s  . co  m*/

        List<InterfaceHttpData> data = decoder.getBodyHttpDatas();
        for (InterfaceHttpData entry : data) {
            Attribute attr = (Attribute) entry;
            try {
                System.out.println(String.format("name: %s value: %s", attr.getName(), attr.getValue()));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    if (msg instanceof HttpContent) {
        String json_input = "";

        HttpContent httpContent = (HttpContent) msg;

        ByteBuf content = httpContent.content();
        if (content.isReadable()) {
            json_input = content.toString(CharsetUtil.UTF_8);
            buf.append("CONTENT: ");
            buf.append(content.toString(CharsetUtil.UTF_8));
            buf.append("\r\n");
        }

        if (msg instanceof LastHttpContent) {
            buf.append("END OF CONTENT\r\n");

            LastHttpContent trailer = (LastHttpContent) msg;
            if (!trailer.trailingHeaders().isEmpty()) {
                buf.append("\r\n");
                for (CharSequence name : trailer.trailingHeaders().names()) {
                    for (CharSequence value : trailer.trailingHeaders().getAll(name)) {
                        buf.append("TRAILING HEADER: ");
                        buf.append(name).append(" = ").append(value).append("\r\n");
                    }
                }
                buf.append("\r\n");
            }
            System.out.println(buf);

            try {
                Statement st = BD_Connect.c.createStatement();// ?
                ResultSet rs = st.executeQuery("Select 1");
            } catch (Exception e) {
                new BD_Connect().BD_Connection_open(); //   
            }

            String json_output = new JSON_Handler().Parse_JSON(json_input); //   JSON ?

            ByteBuf response_content = Unpooled.wrappedBuffer(json_output.getBytes(CharsetUtil.UTF_8));
            HttpResponse resp = new DefaultFullHttpResponse(HTTP_1_1, OK, response_content);

            ctx.writeAndFlush(resp);
            ctx.close();
            new BD_Connect().BD_Connection_close(); //  ?? ? 

        }
    }
}

---

From source file:jmeter.plugins.http2.sampler.HttpResponseHandler.java

License:Apache License

@Override
protected void messageReceived(ChannelHandlerContext ctx, FullHttpResponse msg) throws Exception {
    Integer streamId = msg.headers().getInt(HttpUtil.ExtensionHeaderNames.STREAM_ID.text());
    if (streamId == null) {
        System.err.println("HttpResponseHandler unexpected message received: " + msg);
        return;/*from   www  .j  ava  2  s.c  o  m*/
    }

    ChannelPromise promise = streamidPromiseMap.get(streamId);
    if (promise == null) {
        System.err.println("Message received for unknown stream id " + streamId);
    } else {
        // Do stuff with the message (for now just print it)
        ByteBuf content = msg.content();
        if (content.isReadable()) {
            int contentLength = content.readableBytes();
            byte[] arr = new byte[contentLength];
            content.readBytes(arr);
            System.out.println(new String(arr, 0, contentLength, CharsetUtil.UTF_8));
        }

        promise.setSuccess();

        // Set result
        streamidResponseMap.put(streamId, msg);
    }
}

---

From source file:lesson.discard.DiscardServerHandler.java

License:Apache License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf in = (ByteBuf) msg;
    try {//from w  w w .  jav a2s . c o  m
        while (in.isReadable()) { // (1)
            System.out.print((char) in.readByte());
            System.out.flush();
        }
    } finally {
        ReferenceCountUtil.release(msg); // (2)
    }

}

---

From source file:lesson.echo.DiscardServerHandler.java

License:Apache License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf in = (ByteBuf) msg;
    try {//from www . j  a  va2  s.com
        while (in.isReadable()) {
            System.out.print((char) in.readByte());
            System.out.flush();
        }

        ctx.write(msg);
        //ctx.flush();

    } finally {
        ReferenceCountUtil.release(msg);
    }

}

---

From source file:net.epsilony.utils.codec.modbus.handler.ModbusSlaveResponseEncoderTest.java

License:Open Source License

@Test
public void test() {
    ModbusSlaveResponseEncoder encoder = new ModbusSlaveResponseEncoder();
    EmbeddedChannel channel = new EmbeddedChannel(encoder);

    ModbusResponse response = new ModbusResponse() {
        {//from   ww  w .j  a  va2  s.  c o  m
            transectionId = 0xabcd;
            unitId = 0x83;
        }

        @Override
        public void writePduCore(ByteBuf out) {
            out.writeShort(0xabcd);
            out.writeShort(0xcdef);
            transectionId++;

        }

        @Override
        public int getPduCoreLength() {
            return 4;
        }

        @Override
        public int getFunctionCode() {
            // TODO Auto-generated method stub
            return 6;
        }
    };

    ByteBuf buf = null;
    for (int i = 0; i < 3; i++) {
        channel.writeOutbound(response);
        buf = (ByteBuf) channel.readOutbound();
        int[] buffer = new int[] { 0xab, 0xcd + i, 0x00, 0x00, 0x00, 0x06, 0x83, 0x06, 0xab, 0xcd, 0xcd, 0xef };
        assertEquals(buffer.length, buf.readableBytes());
        for (int b : buffer) {
            assertEquals(b, buf.readUnsignedByte());
        }
        assertTrue(!buf.isReadable());
        ReferenceCountUtil.release(buf);
    }

    for (int i = 0; i < 3; i++) {
        channel.writeOutbound(response);
    }

    for (int i = 0; i < 3; i++) {
        buf = (ByteBuf) channel.readOutbound();
        int[] buffer = new int[] { 0xab, 0xcd + i + 3, 0x00, 0x00, 0x00, 0x06, 0x83, 0x06, 0xab, 0xcd, 0xcd,
                0xef };
        assertEquals(buffer.length, buf.readableBytes());
        for (int b : buffer) {
            assertEquals(b, buf.readUnsignedByte());
        }
        assertTrue(!buf.isReadable());
        ReferenceCountUtil.release(buf);
    }

    encoder.setWithCheckSum(true);
    for (int i = 0; i < 3; i++) {
        channel.writeOutbound(response);
    }
    for (int i = 0; i < 3; i++) {
        buf = (ByteBuf) channel.readOutbound();
        int[] buffer = new int[] { 0xab, 0xcd + i + 6, 0x00, 0x00, 0x00, 0x06, 0x83, 0x06, 0xab, 0xcd, 0xcd,
                0xef };
        assertEquals(buffer.length, buf.readableBytes() - 2);
        for (int b : buffer) {
            assertEquals(b, buf.readUnsignedByte());
        }
        int calcCrc = Utils.crc(buf, buf.readerIndex() - buffer.length, buffer.length);
        assertEquals(calcCrc, buf.readUnsignedShort());
        assertTrue(!buf.isReadable());
        ReferenceCountUtil.release(buf);
    }
}

---

From source file:net.tomp2p.synchronization.SyncUtils.java

License:Apache License

public static List<Instruction> decodeInstructions(ByteBuf buf) {
    List<Instruction> result = new ArrayList<Instruction>();
    while (buf.isReadable()) {
        final int header = buf.readInt();
        if ((header & 0x80000000) != 0) {
            //first bit set, we have a reference
            final int reference = header & 0x7FFFFFFF;
            result.add(new Instruction(reference));
        } else {/*  w w  w.jav  a 2 s . c o m*/
            //otherwise the header is the length
            final int length = header;
            final int remaining = Math.min(length, buf.readableBytes());
            DataBuffer literal = new DataBuffer(buf.slice(buf.readerIndex(), remaining));
            buf.skipBytes(remaining);
            result.add(new Instruction(literal));
        }
    }
    return result;
}

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