2015-06-03 05:15:59 +02:00
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/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License, version 2.0 (the
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* "License"); you may not use this file except in compliance with the License. You may obtain a
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* copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations under
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* the License.
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*/
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package io.netty.handler.codec.http2;
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2015-06-23 00:38:53 +02:00
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import static io.netty.buffer.Unpooled.EMPTY_BUFFER;
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import static io.netty.handler.codec.http2.Http2CodecUtil.DEFAULT_MAX_FRAME_SIZE;
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import static io.netty.handler.codec.http2.Http2CodecUtil.DEFAULT_PRIORITY_WEIGHT;
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import static io.netty.handler.codec.http2.Http2CodecUtil.SMALLEST_MAX_CONCURRENT_STREAMS;
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import static io.netty.handler.codec.http2.Http2Error.CANCEL;
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import static io.netty.handler.codec.http2.Http2Stream.State.HALF_CLOSED_LOCAL;
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import static org.junit.Assert.assertEquals;
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import static org.mockito.Matchers.any;
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import static org.mockito.Matchers.anyBoolean;
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import static org.mockito.Matchers.anyInt;
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import static org.mockito.Matchers.anyLong;
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import static org.mockito.Matchers.eq;
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import static org.mockito.Mockito.mock;
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import static org.mockito.Mockito.never;
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import static org.mockito.Mockito.times;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.when;
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2015-06-03 05:15:59 +02:00
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.Unpooled;
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import io.netty.buffer.UnpooledByteBufAllocator;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelPromise;
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import io.netty.channel.DefaultChannelPromise;
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import io.netty.handler.codec.http2.StreamBufferingEncoder.GoAwayException;
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2015-06-23 00:38:53 +02:00
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import io.netty.util.ReferenceCountUtil;
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import io.netty.util.ReferenceCounted;
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2015-06-03 05:15:59 +02:00
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import io.netty.util.concurrent.ImmediateEventExecutor;
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2015-06-23 00:38:53 +02:00
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import org.junit.After;
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2015-06-03 05:15:59 +02:00
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import org.junit.Before;
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import org.junit.Test;
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2015-06-04 20:55:18 +02:00
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import org.mockito.ArgumentCaptor;
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2015-06-03 05:15:59 +02:00
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import org.mockito.Mock;
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import org.mockito.MockitoAnnotations;
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import org.mockito.invocation.InvocationOnMock;
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import org.mockito.stubbing.Answer;
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import org.mockito.verification.VerificationMode;
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/**
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* Tests for {@link StreamBufferingEncoder}.
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*/
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public class StreamBufferingEncoderTest {
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private StreamBufferingEncoder encoder;
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private Http2Connection connection;
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@Mock
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private Http2FrameWriter writer;
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@Mock
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private ChannelHandlerContext ctx;
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@Mock
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private Channel channel;
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@Mock
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private ChannelPromise promise;
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/**
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* Init fields and do mocking.
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*/
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@Before
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public void setup() throws Exception {
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MockitoAnnotations.initMocks(this);
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Http2FrameWriter.Configuration configuration = mock(Http2FrameWriter.Configuration.class);
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Http2FrameSizePolicy frameSizePolicy = mock(Http2FrameSizePolicy.class);
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when(writer.configuration()).thenReturn(configuration);
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when(configuration.frameSizePolicy()).thenReturn(frameSizePolicy);
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when(frameSizePolicy.maxFrameSize()).thenReturn(DEFAULT_MAX_FRAME_SIZE);
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when(writer.writeData(eq(ctx), anyInt(), any(ByteBuf.class), anyInt(), anyBoolean(),
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eq(promise))).thenAnswer(successAnswer());
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2015-06-03 05:15:59 +02:00
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when(writer.writeRstStream(eq(ctx), anyInt(), anyLong(), eq(promise))).thenAnswer(
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successAnswer());
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when(writer.writeGoAway(eq(ctx), anyInt(), anyLong(), any(ByteBuf.class),
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any(ChannelPromise.class)))
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.thenAnswer(successAnswer());
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connection = new DefaultHttp2Connection(false);
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DefaultHttp2ConnectionEncoder defaultEncoder =
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new DefaultHttp2ConnectionEncoder(connection, writer);
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encoder = new StreamBufferingEncoder(defaultEncoder);
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DefaultHttp2ConnectionDecoder decoder =
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new DefaultHttp2ConnectionDecoder(connection, encoder,
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mock(Http2FrameReader.class), mock(Http2FrameListener.class));
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Http2ConnectionHandler handler = new Http2ConnectionHandler(decoder, encoder);
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// Set LifeCycleManager on encoder and decoder
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when(ctx.channel()).thenReturn(channel);
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when(ctx.alloc()).thenReturn(UnpooledByteBufAllocator.DEFAULT);
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when(ctx.newPromise()).thenReturn(promise);
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when(channel.isActive()).thenReturn(false);
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handler.handlerAdded(ctx);
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}
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2015-06-23 00:38:53 +02:00
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@After
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public void teardown() {
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// Close and release any buffered frames.
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encoder.close();
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}
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2015-06-03 05:15:59 +02:00
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@Test
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public void multipleWritesToActiveStream() {
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encoder.writeSettingsAck(ctx, promise);
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encoderWriteHeaders(3, promise);
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assertEquals(0, encoder.numBufferedStreams());
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encoder.writeData(ctx, 3, data(), 0, false, promise);
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encoder.writeData(ctx, 3, data(), 0, false, promise);
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encoder.writeData(ctx, 3, data(), 0, false, promise);
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encoderWriteHeaders(3, promise);
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writeVerifyWriteHeaders(times(2), 3, promise);
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2015-06-04 20:55:18 +02:00
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// Contiguous data writes are coalesced
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ArgumentCaptor<ByteBuf> bufCaptor = ArgumentCaptor.forClass(ByteBuf.class);
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verify(writer, times(1))
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.writeData(eq(ctx), eq(3), bufCaptor.capture(), eq(0), eq(false), eq(promise));
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assertEquals(data().readableBytes() * 3, bufCaptor.getValue().readableBytes());
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2015-06-03 05:15:59 +02:00
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}
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@Test
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public void ensureCanCreateNextStreamWhenStreamCloses() {
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encoder.writeSettingsAck(ctx, promise);
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setMaxConcurrentStreams(1);
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encoderWriteHeaders(3, promise);
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assertEquals(0, encoder.numBufferedStreams());
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// This one gets buffered.
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encoderWriteHeaders(5, promise);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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// Now prevent us from creating another stream.
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setMaxConcurrentStreams(0);
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// Close the previous stream.
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connection.stream(3).close();
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// Ensure that no streams are currently active and that only the HEADERS from the first
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// stream were written.
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writeVerifyWriteHeaders(times(1), 3, promise);
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writeVerifyWriteHeaders(never(), 5, promise);
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assertEquals(0, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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}
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@Test
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public void alternatingWritesToActiveAndBufferedStreams() {
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encoder.writeSettingsAck(ctx, promise);
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setMaxConcurrentStreams(1);
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encoderWriteHeaders(3, promise);
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assertEquals(0, encoder.numBufferedStreams());
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encoderWriteHeaders(5, promise);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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2015-06-23 00:38:53 +02:00
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encoder.writeData(ctx, 3, EMPTY_BUFFER, 0, false, promise);
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writeVerifyWriteHeaders(times(1), 3, promise);
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encoder.writeData(ctx, 5, EMPTY_BUFFER, 0, false, promise);
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verify(writer, never())
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.writeData(eq(ctx), eq(5), any(ByteBuf.class), eq(0), eq(false), eq(promise));
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}
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@Test
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public void bufferingNewStreamFailsAfterGoAwayReceived() {
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encoder.writeSettingsAck(ctx, promise);
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setMaxConcurrentStreams(0);
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connection.goAwayReceived(1, 8, null);
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promise = mock(ChannelPromise.class);
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encoderWriteHeaders(3, promise);
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assertEquals(0, encoder.numBufferedStreams());
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verify(promise).setFailure(any(Throwable.class));
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}
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@Test
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public void receivingGoAwayFailsBufferedStreams() {
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encoder.writeSettingsAck(ctx, promise);
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setMaxConcurrentStreams(5);
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int streamId = 3;
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for (int i = 0; i < 9; i++) {
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encoderWriteHeaders(streamId, promise);
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streamId += 2;
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}
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assertEquals(4, encoder.numBufferedStreams());
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connection.goAwayReceived(11, 8, null);
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assertEquals(5, connection.numActiveStreams());
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// The 4 buffered streams must have been failed.
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verify(promise, times(4)).setFailure(any(Throwable.class));
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assertEquals(0, encoder.numBufferedStreams());
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}
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@Test
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public void sendingGoAwayShouldNotFailStreams() {
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encoder.writeSettingsAck(ctx, promise);
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setMaxConcurrentStreams(1);
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encoderWriteHeaders(3, promise);
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assertEquals(0, encoder.numBufferedStreams());
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encoderWriteHeaders(5, promise);
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assertEquals(1, encoder.numBufferedStreams());
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encoderWriteHeaders(7, promise);
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assertEquals(2, encoder.numBufferedStreams());
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ByteBuf empty = Unpooled.buffer(0);
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encoder.writeGoAway(ctx, 3, CANCEL.code(), empty, promise);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(2, encoder.numBufferedStreams());
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verify(promise, never()).setFailure(any(GoAwayException.class));
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}
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@Test
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public void endStreamDoesNotFailBufferedStream() {
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encoder.writeSettingsAck(ctx, promise);
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setMaxConcurrentStreams(0);
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encoderWriteHeaders(3, promise);
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assertEquals(1, encoder.numBufferedStreams());
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2015-06-23 00:38:53 +02:00
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encoder.writeData(ctx, 3, EMPTY_BUFFER, 0, true, promise);
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2015-06-03 05:15:59 +02:00
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assertEquals(0, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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// Simulate that we received a SETTINGS frame which
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// increased MAX_CONCURRENT_STREAMS to 1.
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setMaxConcurrentStreams(1);
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encoder.writeSettingsAck(ctx, promise);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(0, encoder.numBufferedStreams());
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assertEquals(HALF_CLOSED_LOCAL, connection.stream(3).state());
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}
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@Test
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public void rstStreamClosesBufferedStream() {
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encoder.writeSettingsAck(ctx, promise);
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setMaxConcurrentStreams(0);
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encoderWriteHeaders(3, promise);
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assertEquals(1, encoder.numBufferedStreams());
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verify(promise, never()).setSuccess();
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ChannelPromise rstStreamPromise = mock(ChannelPromise.class);
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encoder.writeRstStream(ctx, 3, CANCEL.code(), rstStreamPromise);
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verify(promise).setSuccess();
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verify(rstStreamPromise).setSuccess();
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assertEquals(0, encoder.numBufferedStreams());
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}
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@Test
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public void bufferUntilActiveStreamsAreReset() {
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encoder.writeSettingsAck(ctx, promise);
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setMaxConcurrentStreams(1);
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encoderWriteHeaders(3, promise);
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assertEquals(0, encoder.numBufferedStreams());
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encoderWriteHeaders(5, promise);
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assertEquals(1, encoder.numBufferedStreams());
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encoderWriteHeaders(7, promise);
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assertEquals(2, encoder.numBufferedStreams());
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writeVerifyWriteHeaders(times(1), 3, promise);
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writeVerifyWriteHeaders(never(), 5, promise);
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writeVerifyWriteHeaders(never(), 7, promise);
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encoder.writeRstStream(ctx, 3, CANCEL.code(), promise);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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encoder.writeRstStream(ctx, 5, CANCEL.code(), promise);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(0, encoder.numBufferedStreams());
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encoder.writeRstStream(ctx, 7, CANCEL.code(), promise);
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assertEquals(0, connection.numActiveStreams());
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assertEquals(0, encoder.numBufferedStreams());
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}
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@Test
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public void bufferUntilMaxStreamsIncreased() {
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encoder.writeSettingsAck(ctx, promise);
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setMaxConcurrentStreams(2);
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encoderWriteHeaders(3, promise);
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encoderWriteHeaders(5, promise);
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encoderWriteHeaders(7, promise);
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encoderWriteHeaders(9, promise);
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assertEquals(2, encoder.numBufferedStreams());
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writeVerifyWriteHeaders(times(1), 3, promise);
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writeVerifyWriteHeaders(times(1), 5, promise);
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writeVerifyWriteHeaders(never(), 7, promise);
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writeVerifyWriteHeaders(never(), 9, promise);
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// Simulate that we received a SETTINGS frame which
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// increased MAX_CONCURRENT_STREAMS to 5.
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setMaxConcurrentStreams(5);
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encoder.writeSettingsAck(ctx, promise);
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assertEquals(0, encoder.numBufferedStreams());
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writeVerifyWriteHeaders(times(1), 7, promise);
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writeVerifyWriteHeaders(times(1), 9, promise);
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encoderWriteHeaders(11, promise);
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writeVerifyWriteHeaders(times(1), 11, promise);
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assertEquals(5, connection.local().numActiveStreams());
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}
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@Test
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public void bufferUntilSettingsReceived() throws Http2Exception {
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int initialLimit = SMALLEST_MAX_CONCURRENT_STREAMS;
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int numStreams = initialLimit * 2;
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for (int ix = 0, nextStreamId = 3; ix < numStreams; ++ix, nextStreamId += 2) {
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encoderWriteHeaders(nextStreamId, promise);
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if (ix < initialLimit) {
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writeVerifyWriteHeaders(times(1), nextStreamId, promise);
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} else {
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writeVerifyWriteHeaders(never(), nextStreamId, promise);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
assertEquals(numStreams / 2, encoder.numBufferedStreams());
|
|
|
|
|
|
|
|
// Simulate that we received a SETTINGS frame.
|
|
|
|
setMaxConcurrentStreams(initialLimit * 2);
|
|
|
|
|
|
|
|
assertEquals(0, encoder.numBufferedStreams());
|
|
|
|
assertEquals(numStreams, connection.local().numActiveStreams());
|
|
|
|
}
|
|
|
|
|
|
|
|
@Test
|
|
|
|
public void bufferUntilSettingsReceivedWithNoMaxConcurrentStreamValue() throws Http2Exception {
|
|
|
|
int initialLimit = SMALLEST_MAX_CONCURRENT_STREAMS;
|
|
|
|
int numStreams = initialLimit * 2;
|
|
|
|
for (int ix = 0, nextStreamId = 3; ix < numStreams; ++ix, nextStreamId += 2) {
|
|
|
|
encoderWriteHeaders(nextStreamId, promise);
|
|
|
|
if (ix < initialLimit) {
|
|
|
|
writeVerifyWriteHeaders(times(1), nextStreamId, promise);
|
|
|
|
} else {
|
|
|
|
writeVerifyWriteHeaders(never(), nextStreamId, promise);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
assertEquals(numStreams / 2, encoder.numBufferedStreams());
|
|
|
|
|
|
|
|
// Simulate that we received an empty SETTINGS frame.
|
|
|
|
encoder.remoteSettings(new Http2Settings());
|
|
|
|
|
|
|
|
assertEquals(0, encoder.numBufferedStreams());
|
|
|
|
assertEquals(numStreams, connection.local().numActiveStreams());
|
|
|
|
}
|
|
|
|
|
|
|
|
@Test
|
|
|
|
public void exhaustedStreamsDoNotBuffer() throws Http2Exception {
|
|
|
|
// Write the highest possible stream ID for the client.
|
|
|
|
// This will cause the next stream ID to be negative.
|
|
|
|
encoderWriteHeaders(Integer.MAX_VALUE, promise);
|
|
|
|
|
|
|
|
// Disallow any further streams.
|
|
|
|
setMaxConcurrentStreams(0);
|
|
|
|
|
|
|
|
// Simulate numeric overflow for the next stream ID.
|
|
|
|
encoderWriteHeaders(-1, promise);
|
|
|
|
|
|
|
|
// Verify that the write fails.
|
|
|
|
verify(promise).setFailure(any(Http2Exception.class));
|
|
|
|
}
|
|
|
|
|
|
|
|
@Test
|
|
|
|
public void closedBufferedStreamReleasesByteBuf() {
|
|
|
|
encoder.writeSettingsAck(ctx, promise);
|
|
|
|
setMaxConcurrentStreams(0);
|
|
|
|
ByteBuf data = mock(ByteBuf.class);
|
|
|
|
encoderWriteHeaders(3, promise);
|
|
|
|
assertEquals(1, encoder.numBufferedStreams());
|
|
|
|
encoder.writeData(ctx, 3, data, 0, false, promise);
|
|
|
|
|
|
|
|
ChannelPromise rstPromise = mock(ChannelPromise.class);
|
|
|
|
encoder.writeRstStream(ctx, 3, CANCEL.code(), rstPromise);
|
|
|
|
|
|
|
|
assertEquals(0, encoder.numBufferedStreams());
|
|
|
|
verify(rstPromise).setSuccess();
|
|
|
|
verify(promise, times(2)).setSuccess();
|
|
|
|
verify(data).release();
|
|
|
|
}
|
|
|
|
|
|
|
|
private void setMaxConcurrentStreams(int newValue) {
|
|
|
|
try {
|
|
|
|
encoder.remoteSettings(new Http2Settings().maxConcurrentStreams(newValue));
|
2015-06-04 20:55:18 +02:00
|
|
|
// Flush the remote flow controller to write data
|
|
|
|
encoder.flowController().writePendingBytes();
|
2015-06-03 05:15:59 +02:00
|
|
|
} catch (Http2Exception e) {
|
|
|
|
throw new RuntimeException(e);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private void encoderWriteHeaders(int streamId, ChannelPromise promise) {
|
|
|
|
encoder.writeHeaders(ctx, streamId, new DefaultHttp2Headers(), 0, DEFAULT_PRIORITY_WEIGHT,
|
|
|
|
false, 0, false, promise);
|
2015-06-04 20:55:18 +02:00
|
|
|
try {
|
|
|
|
encoder.flowController().writePendingBytes();
|
|
|
|
} catch (Http2Exception e) {
|
|
|
|
throw new RuntimeException(e);
|
|
|
|
}
|
2015-06-03 05:15:59 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
private void writeVerifyWriteHeaders(VerificationMode mode, int streamId,
|
|
|
|
ChannelPromise promise) {
|
|
|
|
verify(writer, mode).writeHeaders(eq(ctx), eq(streamId), any(Http2Headers.class), eq(0),
|
|
|
|
eq(DEFAULT_PRIORITY_WEIGHT), eq(false), eq(0),
|
|
|
|
eq(false), eq(promise));
|
|
|
|
}
|
|
|
|
|
|
|
|
private Answer<ChannelFuture> successAnswer() {
|
|
|
|
return new Answer<ChannelFuture>() {
|
|
|
|
@Override
|
|
|
|
public ChannelFuture answer(InvocationOnMock invocation) throws Throwable {
|
2015-06-23 00:38:53 +02:00
|
|
|
for (Object a : invocation.getArguments()) {
|
|
|
|
ReferenceCountUtil.safeRelease(a);
|
2015-06-09 07:24:32 +02:00
|
|
|
}
|
|
|
|
|
2015-06-03 05:15:59 +02:00
|
|
|
ChannelPromise future =
|
|
|
|
new DefaultChannelPromise(channel, ImmediateEventExecutor.INSTANCE);
|
|
|
|
future.setSuccess();
|
|
|
|
return future;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
private static ByteBuf data() {
|
|
|
|
ByteBuf buf = Unpooled.buffer(10);
|
|
|
|
for (int i = 0; i < buf.writableBytes(); i++) {
|
|
|
|
buf.writeByte(i);
|
|
|
|
}
|
|
|
|
return buf;
|
|
|
|
}
|
|
|
|
}
|