Example usage for io.netty.channel FileRegion position

Introduction

In this page you can find the example usage for io.netty.channel FileRegion position.

Prototype

long position();

Source Link

Document

Returns the offset in the file where the transfer began.

Usage

From source file:reactor.ipc.netty.NettyOutboundTest.java

License:Open Source License

@Test
public void sendFileWithoutTlsUsesFileRegion() throws URISyntaxException, IOException {
    List<Class<?>> messageClasses = new ArrayList<>(2);

    EmbeddedChannel channel = new EmbeddedChannel(new MessageToMessageEncoder<FileRegion>() {

        @Override/* w w w. ja v  a  2  s  .c om*/
        protected void encode(ChannelHandlerContext ctx, FileRegion msg, List<Object> out) throws Exception {
            ByteArrayOutputStream bais = new ByteArrayOutputStream();
            WritableByteChannel wbc = Channels.newChannel(bais);

            msg.transferTo(wbc, msg.position());
            out.add(new String(bais.toByteArray()));
        }
    }, new MessageToMessageEncoder<Object>() {
        @Override
        protected void encode(ChannelHandlerContext ctx, Object msg, List<Object> out) throws Exception {
            messageClasses.add(msg.getClass());
            ReferenceCountUtil.retain(msg);
            out.add(msg);
        }
    });
    NettyContext mockContext = () -> channel;
    NettyOutbound outbound = new NettyOutbound() {
        @Override
        public NettyContext context() {
            return mockContext;
        }

        @Override
        public FileChunkedStrategy getFileChunkedStrategy() {
            return FILE_CHUNKED_STRATEGY_1024_NOPIPELINE;
        }
    };
    channel.writeOneOutbound(1);

    outbound.sendFile(Paths.get(getClass().getResource("/largeFile.txt").toURI())).then().block();

    assertThat(channel.inboundMessages()).isEmpty();
    assertThat(channel.outboundMessages()).hasSize(2);
    assertThat(messageClasses).containsExactly(Integer.class, DefaultFileRegion.class);

    assertThat(channel.outboundMessages()).element(1).asString().startsWith(
            "This is an UTF-8 file that is larger than 1024 bytes.\nIt contains accents like .\nGARBAGE")
            .endsWith("GARBAGE\nEnd of File");
}

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