testWrapMemoryMapped() — netty Function Reference

Architecture documentation for the testWrapMemoryMapped() function in ReadOnlyDirectByteBufferBufTest.java from the netty codebase.

Function java Buffer Allocators

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Buffer→ Allocators→ testWrapMemoryMapped() — netty Function Reference

Dependency Diagram

graph TD
  88213226_3fde_e35e_060c_2c7ce6b5c7f8["testWrapMemoryMapped()"]
  2436e747_1306_235e_86df_d12765b22d51["ReadOnlyDirectByteBufferBufTest"]
  88213226_3fde_e35e_060c_2c7ce6b5c7f8 -->|defined in| 2436e747_1306_235e_86df_d12765b22d51
  style 88213226_3fde_e35e_060c_2c7ce6b5c7f8 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

buffer/src/test/java/io/netty/buffer/ReadOnlyDirectByteBufferBufTest.java lines 383–424

    @Test
    public void testWrapMemoryMapped() throws Exception {
        File file = PlatformDependent.createTempFile("netty-test", "tmp", null);
        FileChannel output = null;
        FileChannel input = null;
        ByteBuf b1 = null;
        ByteBuf b2 = null;

        try {
            output = new RandomAccessFile(file, "rw").getChannel();
            byte[] bytes = new byte[1024];
            ThreadLocalRandom.current().nextBytes(bytes);
            output.write(ByteBuffer.wrap(bytes));

            input = new RandomAccessFile(file, "r").getChannel();
            ByteBuffer m = input.map(FileChannel.MapMode.READ_ONLY, 0, input.size());

            b1 = buffer(m);

            ByteBuffer dup = m.duplicate();
            dup.position(2);
            dup.limit(4);

            b2 = buffer(dup);

            assertEquals(b2, b1.slice(2, 2));
        } finally {
            if (b1 != null) {
                b1.release();
            }
            if (b2 != null) {
                b2.release();
            }
            if (output != null) {
                output.close();
            }
            if (input != null) {
                input.close();
            }
            file.delete();
        }
    }