io.netty.buffer.Unpooled Java Examples

@Test
public void testParseSetKeyTtl() throws Exception {
  EtcdKeysResponse action = EtcdKeysResponse.DECODER.decode(headers, Unpooled.copiedBuffer(("{\n" +
      "    \"action\": \"set\",\n" +
      "    \"node\": {\n" +
      "        \"createdIndex\": 5,\n" +
      "        \"expiration\": \"2013-12-04T12:01:21.874888581-08:00\",\n" +
      "        \"key\": \"/foo\",\n" +
      "        \"modifiedIndex\": 5,\n" +
      "        \"ttl\": 5,\n" +
      "        \"value\": \"bar\"\n" +
      "    }\n" +
      "}").getBytes()));

  assertEquals(EtcdKeyAction.set, action.action);
  assertEquals(5, action.node.createdIndex.intValue());
  assertEquals("/foo", action.node.key);
  assertEquals(5, action.node.modifiedIndex.intValue());
  assertEquals("bar", action.node.value);
  assertEquals(5, action.node.ttl.intValue());
  assertEquals(convertDate("2013-12-04T12:01:21.874888581-08:00"), action.node.expiration);
}
 

@Test
public void testUpgradeDataEnd() throws Exception {
    EmbeddedChannel ch = new EmbeddedChannel(new Http2StreamFrameToHttpObjectCodec(true));
    ByteBuf hello = Unpooled.copiedBuffer("hello world", CharsetUtil.UTF_8);
    LastHttpContent end = new DefaultLastHttpContent(hello, true);
    assertTrue(ch.writeOutbound(end));

    Http2DataFrame dataFrame = ch.readOutbound();
    try {
        assertThat(dataFrame.content().toString(CharsetUtil.UTF_8), is("hello world"));
        assertTrue(dataFrame.isEndStream());
    } finally {
        dataFrame.release();
    }

    assertThat(ch.readOutbound(), is(nullValue()));
    assertFalse(ch.finish());
}
 

@Test
public void testCreateBitArray() {
    Assert.assertArrayEquals(new byte[1], new BitArray(5).array());
    Assert.assertArrayEquals(new byte[3], new BitArray(23).array());
    Assert.assertArrayEquals(new byte[3], new BitArray(24).array());
    Assert.assertArrayEquals(new byte[4], new BitArray(25).array());

    final byte[] a = new byte[] {1, 2, 3, 4};
    Assert.assertArrayEquals(a, BitArray.valueOf(a).array());

    final byte b = 44;
    Assert.assertEquals(b, BitArray.valueOf(b).toByte());

    final ByteBuf buf = Unpooled.wrappedBuffer(a);
    Assert.assertArrayEquals(new byte[] {1, 2}, BitArray.valueOf(buf, 12).array());

    final ByteBuf res = Unpooled.buffer();
    final BitArray i = BitArray.valueOf(a);
    i.toByteBuf(res);
    Assert.assertArrayEquals(new byte[] {1, 2, 3, 4}, ByteArray.readAllBytes(res));
}
 

private void writeBytesToChannel(EmbeddedChannel ch, byte[] bytes, boolean randomlySlice) {
  if (randomlySlice) {
    long bytesWritten = 0;
    List<List<Byte>> slices = NetTestUtils.getRandomByteSlices(bytes);
    for (int s = 0; s<slices.size(); s++) {
      List<Byte> slice = slices.get(s);
      byte[] sliceBytes = Bytes.toArray(slice);
      ch.writeInbound(Unpooled.wrappedBuffer(sliceBytes));
      bytesWritten += sliceBytes.length;
    }

    assertThat(bytesWritten, equalTo((long)bytes.length));
  } else {
    ch.writeInbound(Unpooled.wrappedBuffer(bytes));
  }
}
 

@Override
public void channelRead0(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
    byte[] actual = new byte[in.readableBytes()];
    in.readBytes(actual);

    int lastIdx = counter;
    for (int i = 0; i < actual.length; i ++) {
        assertEquals(data[i + lastIdx], actual[i]);
    }

    if (channel.parent() != null) {
        channel.write(Unpooled.wrappedBuffer(actual));
    }

    counter += actual.length;
}
 

@Override
public ByteBuf readChunk(ByteBufAllocator allocator) throws Exception {
  ByteBuf buf = null;
  if (streamed == 0) {
    startTime = System.currentTimeMillis();
  }
  if (!isEndOfInput()) {
    long currentChunkSendTime = System.currentTimeMillis();
    int remaining = (totalSize - streamed) > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int) (totalSize - streamed);
    int toWrite = Math.min(chunk.length, remaining);
    buf = Unpooled.wrappedBuffer(chunk, 0, toWrite);
    streamed += toWrite;
    if (lastChunkSendTime > 0) {
      perfClientMetrics.delayBetweenChunkSendInMs.update(currentChunkSendTime - lastChunkSendTime);
    }
    lastChunkSendTime = currentChunkSendTime;
  }
  return buf;
}
 

@Override
protected void encode(ChannelHandlerContext ctx, ASMessage msg, List<Object> out) throws Exception
{
	ByteBuf buffer = Unpooled.buffer();
	Class<? extends ASMessage> clazz = msg.getClass();
	if (!packets.contains(msg.getClass()))
	{
		throw new NullPointerException("No Packet Registered for: " + msg.getClass().getCanonicalName());
	}
	
	byte discriminator = (byte) packets.indexOf(clazz);
	buffer.writeByte(discriminator);
	try
	{
		msg.encodeInto(ctx, buffer);
	} catch (IOException e)
	{
		e.printStackTrace();
		throw e;
	}
	FMLProxyPacket proxyPacket = new FMLProxyPacket(buffer, ctx.channel().attr(NetworkRegistry.FML_CHANNEL).get());
	out.add(proxyPacket);
}
 

@Test
public void testValidRequestWith100ContinueAndDecoder() {
    EmbeddedChannel embedder = new EmbeddedChannel(new HttpRequestDecoder(), new HttpObjectAggregator(100));
    embedder.writeInbound(Unpooled.copiedBuffer(
        "GET /upload HTTP/1.1\r\n" +
            "Expect: 100-continue\r\n" +
            "Content-Length: 0\r\n\r\n", CharsetUtil.US_ASCII));

    FullHttpResponse response = embedder.readOutbound();
    assertEquals(HttpResponseStatus.CONTINUE, response.status());
    FullHttpRequest request = embedder.readInbound();
    assertFalse(request.headers().contains(HttpHeaderNames.EXPECT));
    request.release();
    response.release();
    assertFalse(embedder.finish());
}
 

@Test
public void testUnrecognizedAttributes() throws BGPDocumentedException, BGPParsingException {
    final byte[] attributeBytes = { (byte)0xe0, 0x00, 0x05, 0x01, 0x02, 0x03, 0x04, 0x05 };
    final Map<UnrecognizedAttributesKey, UnrecognizedAttributes> unrecogAttribs = SIMPLE_ATTR_REG.parseAttributes(
        Unpooled.wrappedBuffer(attributeBytes), null).getAttributes().getUnrecognizedAttributes();
    assertEquals(UNRECOGNIZED_ATTRIBUTE_COUNT, unrecogAttribs.size());
    final UnrecognizedAttributes unrecogAttrib = unrecogAttribs.values().iterator().next();
    final UnrecognizedAttributesKey expectedAttribKey =
        new UnrecognizedAttributesKey(unrecogAttrib.getType());

    assertTrue(unrecogAttrib.isPartial());
    assertTrue(unrecogAttrib.isTransitive());
    assertArrayEquals(ByteArray.cutBytes(attributeBytes, NON_VALUE_BYTES), unrecogAttrib.getValue());
    assertEquals(NON_EXISTENT_TYPE, unrecogAttrib.getType().shortValue());
    assertEquals(expectedAttribKey, unrecogAttrib.key());
}
 

@Test
public void testMultipleNames() throws Exception {
    ByteBuf headerBlock = ReferenceCountUtil.releaseLater(Unpooled.buffer(38));
    headerBlock.writeInt(2);
    headerBlock.writeInt(4);
    headerBlock.writeBytes(nameBytes);
    headerBlock.writeInt(5);
    headerBlock.writeBytes(valueBytes);
    headerBlock.writeInt(4);
    headerBlock.writeBytes(nameBytes);
    headerBlock.writeInt(5);
    headerBlock.writeBytes(valueBytes);
    decoder.decode(ByteBufAllocator.DEFAULT, headerBlock, frame);

    assertFalse(headerBlock.isReadable());
    assertTrue(frame.isInvalid());
    assertEquals(1, frame.headers().names().size());
    assertTrue(frame.headers().contains(name));
    assertEquals(1, frame.headers().getAll(name).size());
    assertEquals(value, frame.headers().get(name));
}
 

public byte[] encrypt(byte[] data, int len)
{
	ByteBuf buf = Unpooled.wrappedBuffer(data, 0, len);
	ByteBuf out = Unpooled.buffer(len);
	int numBlocks = len / 8;
	for (int block = 0; block < numBlocks; ++block)
	{
		int v0 = buf.readInt();
		int v1 = buf.readInt();
		int sum = 0;
		for (int i = 0; i < ROUNDS; ++i)
		{
			v0 += (((v1 << 4) ^ (v1 >>> 5)) + v1) ^ (sum + key[sum & 3]);
			sum += GOLDEN_RATIO;
			v1 += (((v0 << 4) ^ (v0 >>> 5)) + v0) ^ (sum + key[(sum >>> 11) & 3]);
		}
		out.writeInt(v0);
		out.writeInt(v1);
	}
	out.writeBytes(buf);
	return out.array();
}
 

/**
 * Write to channel.
 *
 * @param channel the channel
 * @param magicBytes the magic bytes
 * @param pathOrCommand the path or command
 * @param attachment the attachment
 * @throws ConnectException the connect exception
 */
private void writeToChannel(Channel channel, String[] magicBytes, Object pathOrCommand, Object attachment) throws ConnectException {
	long firstAttempt = System.currentTimeMillis();
	long timeOut = RemotingConstants.TEN * RemotingConstants.THOUSAND;
	while (!channel.isOpen() || !channel.isActive()) {
		if (System.currentTimeMillis() - firstAttempt >= timeOut) {
			try {
				throw new TimeoutException();
			} catch (TimeoutException e) {
				logger.error("Waited for 10 sec for connection reattempt to JumbuneAgent, but failed to connect", e);
			}
			break;
		}
	}
	if (!channel.isActive()) {
		logger.warn("Channel #" + channel.hashCode() + " still disconnected, about to write on disconnected Channel");
	}
	if (attachment != null && attachment instanceof CyclicBarrier) {
		channel.attr(RemotingConstants.barrierKey).set((CyclicBarrier)attachment);
	}else if (attachment != null) {
		channel.attr(RemotingConstants.handlerKey).set((ChannelInboundHandler)attachment);
	}
	channel.write(Unpooled.wrappedBuffer(magicBytes[0].getBytes(), magicBytes[1].getBytes(), magicBytes[2].getBytes()));
	channel.write(pathOrCommand);
	channel.flush();
}
 

@Test
public void testMultipleValuesEndsWithNull() throws Exception {
    ByteBuf headerBlock = Unpooled.buffer(28);
    headerBlock.writeInt(1);
    headerBlock.writeInt(4);
    headerBlock.writeBytes(nameBytes);
    headerBlock.writeInt(12);
    headerBlock.writeBytes(valueBytes);
    headerBlock.writeByte(0);
    headerBlock.writeBytes(valueBytes);
    headerBlock.writeByte(0);
    decoder.decode(ByteBufAllocator.DEFAULT, headerBlock, frame);

    assertFalse(headerBlock.isReadable());
    assertTrue(frame.isInvalid());
    assertEquals(1, frame.headers().names().size());
    assertTrue(frame.headers().contains(name));
    assertEquals(1, frame.headers().getAll(name).size());
    assertEquals(value, frame.headers().get(name));
    headerBlock.release();
}
 

private static ByteBuf encode(List<LookupCommand> commands) {
    CompositeByteBuf compositeBuf = Unpooled.compositeBuffer(commands.size()); //FIXME pooled allocator?
    for (LookupCommand command : commands) {
        byte[] pathBytes = command.path().getBytes(CharsetUtil.UTF_8);
        short pathLength = (short) pathBytes.length;

        ByteBuf commandBuf = Unpooled.buffer(4 + pathLength); //FIXME a way of using the pooled allocator?
        commandBuf.writeByte(command.opCode());
        //flags
        if (command.xattr()) {
            commandBuf.writeByte(SUBDOC_FLAG_XATTR_PATH);
        } else {
            commandBuf.writeByte(0);
        }
        commandBuf.writeShort(pathLength);
        //no value length
        commandBuf.writeBytes(pathBytes);

        compositeBuf.addComponent(commandBuf);
        compositeBuf.writerIndex(compositeBuf.writerIndex() + commandBuf.readableBytes());
    }
    return compositeBuf;
}
 

@Test
public void testDecodeLastEmptyBuffer() {
    EmbeddedChannel channel = new EmbeddedChannel(new ByteToMessageDecoder() {
        @Override
        protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
            int readable = in.readableBytes();
            assertTrue(readable > 0);
            out.add(in.readBytes(readable));
        }
    });
    byte[] bytes = new byte[1024];
    PlatformDependent.threadLocalRandom().nextBytes(bytes);

    assertTrue(channel.writeInbound(Unpooled.wrappedBuffer(bytes)));
    assertBuffer(Unpooled.wrappedBuffer(bytes), (ByteBuf) channel.readInbound());
    assertNull(channel.readInbound());
    assertFalse(channel.finish());
    assertNull(channel.readInbound());
}
 

@Test
public void testOriginatorParser() {
    final OriginatorSrgbTlvParser parser = new OriginatorSrgbTlvParser();
    final List<SrgbValue> list = new ArrayList<>();

    final Srgb srgb1 = new Srgb(Uint32.ONE);
    final Srgb srgb2 = new Srgb(Uint32.TWO);
    list.add(new SrgbValueBuilder().setBase(srgb1).setRange(srgb2).build());
    list.add(new SrgbValueBuilder().setBase(srgb2).setRange(srgb1).build());

    final LuOriginatorSrgbTlv tlv = new LuOriginatorSrgbTlvBuilder().setSrgbValue(list).build();
    final ByteBuf serialized = Unpooled.buffer(14);
    parser.serializeBgpPrefixSidTlv(tlv, serialized);
    final byte[] expected = new byte[] {0, 0, 0, 0, 1, 0, 0, 2, 0, 0, 2, 0, 0, 1};
    assertArrayEquals(expected, serialized.array());

    final LuOriginatorSrgbTlv parsed = parser.parseBgpPrefixSidTlv(serialized);
    assertEquals(tlv.getSrgbValue().size(), parsed.getSrgbValue().size());
    assertEquals(tlv.getSrgbValue().get(0).getBase(), srgb1);
    assertEquals(tlv.getSrgbValue().get(0).getRange(), srgb2);
    assertEquals(tlv.getSrgbValue().get(1).getBase(), srgb2);
    assertEquals(tlv.getSrgbValue().get(1).getRange(), srgb1);

    assertEquals(3, parser.getType());
}
 

@Override
public void execute(UnitRequest msg, Handler<UnitResponse> handler) throws Exception {
    JSONObject json = new JSONObject() {{
        put("scope", msg.getString("scope"));
        put("description", msg.getString("description"));
        put("cc_expires_in", msg.get("cc_expires_in", Integer.class));
        put("pass_expires_in", msg.get("pass_expires_in", Integer.class));
        if (null != msg.get("refresh_expires_in")) {
            put("refresh_expires_in", msg.get("refresh_expires_in", Integer.class));
        }
    }};
    String body = json.toJSONString(), uri = msg.getContext().getUri();
    ByteBuf byteBuffer = Unpooled.wrappedBuffer(body.getBytes());
    FullHttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.POST, uri, byteBuffer);
    request.headers().add(HttpHeaderNames.CONTENT_TYPE, HttpHeaderValues.APPLICATION_JSON);

    // TODO DBManagerFactory.getInstance().storeScope(scope) 有bug，数据没存进去，导致 返回更新成功，数据没替换掉
    Single.just(OAuthService.getScopeService().updateScope(request, msg.getString("scope"))).subscribe(
            message -> handler.handle(UnitResponse.createSuccess(message)),
            exception -> handler.handle(UnitResponse.createException(exception))
    );
}
 

public void giveItem(ItemStack stack) {
    ByteBuf buf = Unpooled.buffer(0);
    buf.writeByte(10);

    ItemStack mail = new ItemStack(Items.stick);
    NBTTagList tagList = new NBTTagList();

    for (int i = 0; i < 6; i++) {
        NBTTagCompound item = new NBTTagCompound();
        item.setByte("Slot", (byte) i);
        stack.writeToNBT(item);
        tagList.appendTag(item);
    }

    NBTTagCompound inv = new NBTTagCompound();
    inv.setTag("Items", tagList);
    inv.setString("UniqueID", UUID.randomUUID().toString());
    mail.stackTagCompound = new NBTTagCompound();
    mail.stackTagCompound.setTag("Package", inv);
    ByteBufUtils.writeItemStack(buf, mail);
    C17PacketCustomPayload packet = new C17PacketCustomPayload("cfm", buf);
    Wrapper.INSTANCE.player().sendQueue.addToSendQueue(packet);
}
 

@Test
public void testPathBindingTlvMplsLabelEntry() {
    final byte[] pathBindingBytes = {
        0x00, 0x1f, 0x00, 0x06, 0x00, 0x01, (byte) 0xA8, (byte) 0x0F, (byte) 0x6D, (byte)0xAD, 0x00, 0x00
    };
    final PathBindingTlvParser parser = new PathBindingTlvParser();
    final PathBindingBuilder builder = new PathBindingBuilder();
    builder.setBindingTypeValue(new MplsLabelEntryBuilder()
        .setTrafficClass(Uint8.valueOf(6))
        .setTimeToLive(Uint8.valueOf(173))
        .setBottomOfStack(true)
        .setLabel(new MplsLabel(Uint32.valueOf(688374))).build());
    final PathBinding tlv = builder.build();
    final ByteBuf buff = Unpooled.buffer();
    parser.serializeTlv(tlv, buff);
    assertArrayEquals(pathBindingBytes, ByteArray.readAllBytes(buff));
}
 

@Test
public void testHandler() {
    final VrfRouteImportExtendedCommunityCase expected = new VrfRouteImportExtendedCommunityCaseBuilder()
            .setVrfRouteImportExtendedCommunity(new VrfRouteImportExtendedCommunityBuilder()
                    .setInet4SpecificExtendedCommunityCommon(new Inet4SpecificExtendedCommunityCommonBuilder()
                            .setGlobalAdministrator(new Ipv4AddressNoZone("12.51.2.5"))
                            .setLocalAdministrator(new byte[]{21, 45}).build())
                    .build())
            .build();

    final ExtendedCommunity exComm = this.handler.parseExtendedCommunity(Unpooled.copiedBuffer(INPUT));
    assertEquals(expected, exComm);

    final ByteBuf output = Unpooled.buffer(INPUT.length);
    this.handler.serializeExtendedCommunity(expected, output);
    Assert.assertArrayEquals(INPUT, output.array());

    assertEquals(11, this.handler.getSubType());
}
 

public Object send(String mobileNumber, String hexMessage) {

        if (!hexMessage.startsWith("7e"))
            hexMessage = "7e" + hexMessage + "7e";
        ByteBuf msg = Unpooled.wrappedBuffer(ByteBufUtil.decodeHexDump(hexMessage));
        Session session = SessionManager.getInstance().getByMobileNumber(mobileNumber);


        session.getChannel().writeAndFlush(msg);

        String key = mobileNumber;
        SyncFuture receive = messageManager.receive(key);
        try {
            return receive.get(5, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            messageManager.remove(key);
            e.printStackTrace();
        }
        return null;
    }
 

@Test
public void testHandler() throws BGPDocumentedException, BGPParsingException {
    final AsTwoOctetSpecificEcHandler handler = new AsTwoOctetSpecificEcHandler();
    final AsSpecificExtendedCommunityCase expected = new AsSpecificExtendedCommunityCaseBuilder()
            .setAsSpecificExtendedCommunity(new AsSpecificExtendedCommunityBuilder()
                .setGlobalAdministrator(new ShortAsNumber(Uint32.valueOf(54)))
                .setLocalAdministrator(new byte[] { 0, 0, 1, 76 }).build())
            .build();

    final ExtendedCommunity exComm = handler.parseExtendedCommunity(Unpooled.copiedBuffer(INPUT));
    Assert.assertEquals(expected, exComm);

    final ByteBuf output = Unpooled.buffer(INPUT.length);
    handler.serializeExtendedCommunity(expected, output);
    Assert.assertArrayEquals(INPUT, output.array());
}
 

@Override
public void serializeAttribute(final Attributes attributes, final ByteBuf byteAggregator) {
    final Map<UnrecognizedAttributesKey, UnrecognizedAttributes> unrecognizedAttrs =
            attributes.getUnrecognizedAttributes();
    if (unrecognizedAttrs == null) {
        return;
    }
    for (final UnrecognizedAttributes unrecognizedAttr : unrecognizedAttrs.values()) {
        LOG.trace("Serializing unrecognized attribute of type {}", unrecognizedAttr.getType());
        int flags = AttributeUtil.OPTIONAL;
        if (unrecognizedAttr.isPartial()) {
            flags |= AttributeUtil.PARTIAL;
        }
        if (unrecognizedAttr.isTransitive()) {
            flags |= AttributeUtil.TRANSITIVE;
        }
        AttributeUtil.formatAttribute(flags, unrecognizedAttr.getType().toJava(),
                Unpooled.wrappedBuffer(unrecognizedAttr.getValue()), byteAggregator);
    }
}
 

private static ByteBuf decode(byte[] source, int off, int limit, boolean url) throws IOException {
    int len = limit - off;
    int remainder = len % 4;
    int size = ((len / 4) + (remainder == 0 ? 0 : 4 - remainder)) * 3;
    byte[] buffer = new byte[size];
    int actual = new Decoder(url).decode(source, off, limit, buffer, 0, size);
    return Unpooled.wrappedBuffer(buffer, 0, actual);
}
 

@Test
public void testIncompleteHeaderFieldRepresentation() throws Http2Exception {
    // Incomplete Literal Header Field with Incremental Indexing
    byte[] input = {(byte) 0x40};
    ByteBuf in = Unpooled.wrappedBuffer(input);
    try {
        expectedException.expect(Http2Exception.class);
        hpackDecoder.decode(0, in, mockHeaders, true);
    } finally {
        in.release();
    }
}
 

@Test
public void testImplicitIntegerConversion() throws Exception {
    final byte[] payload = "12".getBytes();
    final CompletableFuture latch = new CompletableFuture();

    WebSocketTestClient client = new WebSocketTestClient(new URI("ws://" + DefaultServer.getHostAddress("default") + ":" + DefaultServer.getHostPort("default") + "/ws/increment/2"));
    client.connect();
    client.send(new TextWebSocketFrame(Unpooled.wrappedBuffer(payload)), new FrameChecker(TextWebSocketFrame.class, "14".getBytes(), latch));
    latch.get();
    client.destroy();
}
 

@Test
public void testCancelWrite() throws Exception {
    ChannelPipeline pipeline = new LocalChannel().pipeline();
    group.register(pipeline.channel());

    ChannelPromise promise = pipeline.channel().newPromise();
    assertTrue(promise.cancel(false));
    ByteBuf buffer = Unpooled.buffer();
    assertEquals(1, buffer.refCnt());
    ChannelFuture future = pipeline.write(buffer, promise);
    assertTrue(future.isCancelled());
    assertEquals(0, buffer.refCnt());
}
 

@Test
public void testBadBlockHeader() throws Exception {
    expected.expect(DecompressionException.class);
    expected.expectMessage("bad block header");

    ByteBuf in = Unpooled.buffer();
    in.writeMedium(MAGIC_NUMBER);
    in.writeByte('1');  //block size
    in.writeMedium(11); //incorrect block header
    in.writeMedium(11); //incorrect block header
    in.writeInt(11111); //block CRC

    channel.writeInbound(in);
}
 

protected Object toObject(Decoder<?> decoder, byte[] value) throws IOException, ClassNotFoundException {
   	if (value == null) {
   		return null;
   	}
   	
   	ByteBuf buf = Unpooled.wrappedBuffer(value);
   	try {
   	    return decoder.decode(buf, null);
       } finally {
           buf.release();
       }
}
 

@Override
public void serializeObject(final Object object, final ByteBuf buffer) {
    checkArgument(object instanceof Metric, "Wrong instance of PCEPObject. Passed %s. Needed MetricObject.",
        object.getClass());
    final Metric mObj = (Metric) object;
    final ByteBuf body = Unpooled.buffer(SIZE);
    body.writeZero(RESERVED);
    final BitArray flags = new BitArray(FLAGS_SIZE);
    flags.set(C_FLAG_OFFSET, mObj.isComputed());
    flags.set(B_FLAG_OFFSET, mObj.isBound());
    flags.toByteBuf(body);
    ByteBufUtils.writeMandatory(body, mObj.getMetricType(), "MetricType");
    writeFloat32(mObj.getValue(), body);
    ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), body, buffer);
}