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EchoHandler Class — netty Architecture

Architecture documentation for the EchoHandler class in SocketObjectEchoTest.java from the netty codebase.

Class java

Entity Profile

Dependency Diagram

graph TD
  b75c2f1e_0706_3806_16e3_edbe61b769bc["EchoHandler"]
  e6441b19_4ea7_cefa_16d5_cc332a23b8ae["SocketObjectEchoTest.java"]
  b75c2f1e_0706_3806_16e3_edbe61b769bc -->|defined in| e6441b19_4ea7_cefa_16d5_cc332a23b8ae
  8400ecb9_6ce0_eb65_95e7_42fb3dd1f7ef["EchoHandler()"]
  b75c2f1e_0706_3806_16e3_edbe61b769bc -->|method| 8400ecb9_6ce0_eb65_95e7_42fb3dd1f7ef
  37fa9198_947f_7921_a13a_e3199647eb16["channelActive()"]
  b75c2f1e_0706_3806_16e3_edbe61b769bc -->|method| 37fa9198_947f_7921_a13a_e3199647eb16
  22f9ebb4_e2a3_369b_1cdb_ad5bde0062eb["channelRead()"]
  b75c2f1e_0706_3806_16e3_edbe61b769bc -->|method| 22f9ebb4_e2a3_369b_1cdb_ad5bde0062eb
  40ba7df0_7564_c222_ca3b_107f8e2bd54d["channelReadComplete()"]
  b75c2f1e_0706_3806_16e3_edbe61b769bc -->|method| 40ba7df0_7564_c222_ca3b_107f8e2bd54d
  ad5baa45_f9f0_16f8_2b8f_b554eb5abc5b["exceptionCaught()"]
  b75c2f1e_0706_3806_16e3_edbe61b769bc -->|method| ad5baa45_f9f0_16f8_2b8f_b554eb5abc5b

Relationship Graph

Source Code

testsuite/src/main/java/io/netty/testsuite/transport/socket/SocketObjectEchoTest.java lines 155–203

    private static class EchoHandler extends ChannelInboundHandlerAdapter {
        private final boolean autoRead;
        volatile Channel channel;
        final AtomicReference<Throwable> exception = new AtomicReference<Throwable>();
        volatile int counter;

        EchoHandler(boolean autoRead) {
            this.autoRead = autoRead;
        }

        @Override
        public void channelActive(ChannelHandlerContext ctx)
                throws Exception {
            channel = ctx.channel();
            if (!autoRead) {
                ctx.read();
            }
        }

        @Override
        public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
            assertEquals(data[counter], msg);

            if (channel.parent() != null) {
                channel.write(msg);
            }

            counter ++;
        }

        @Override
        public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
            try {
                ctx.flush();
            } finally {
                if (!autoRead) {
                    ctx.read();
                }
            }
        }

        @Override
        public void exceptionCaught(ChannelHandlerContext ctx,
                Throwable cause) throws Exception {
            if (exception.compareAndSet(null, cause)) {
                ctx.close();
            }
        }
    }

Defined In

Source

Frequently Asked Questions

What is the EchoHandler class?
EchoHandler is a class in the netty codebase, defined in testsuite/src/main/java/io/netty/testsuite/transport/socket/SocketObjectEchoTest.java.
Where is EchoHandler defined?
EchoHandler is defined in testsuite/src/main/java/io/netty/testsuite/transport/socket/SocketObjectEchoTest.java at line 155.

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