Examples of java.nio.ByteBuffer.asReadOnlyBuffer()

java.nio.ByteBuffer.asReadOnlyBuffer()
Returns a readonly buffer that shares content with this buffer.
The returned buffer is guaranteed to be a new instance, even this buffer is readonly itself. The new buffer's position, limit, capacity and mark are the same as this buffer.

The new buffer shares content with this buffer, which means this buffer's change of content will be visible to the new buffer. The two buffer's position, limit and mark are independent.
@return A readonly version of this buffer.

            MyJapi.f313bb(MyJapi.f213bb());
            assert (nf213bb + 1 == f213bb.asReadOnlyBuffer().get());


            out.println("\ncalling f314bb(f214bb())");
            final ByteBuffer f214bb = MyJapi.f214bb().order(ByteOrder.nativeOrder());
            final byte nf214bb = f214bb.asReadOnlyBuffer().get();
            MyJapi.f314bb(f214bb);
            assert (nf214bb == f214bb.asReadOnlyBuffer().get());
            MyJapi.f314bb(MyJapi.f214bb());
            assert (nf214bb + 1 == f214bb.asReadOnlyBuffer().get());

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            out.println("\ncalling f314bb(f214bb())");
            final ByteBuffer f214bb = MyJapi.f214bb().order(ByteOrder.nativeOrder());
            final byte nf214bb = f214bb.asReadOnlyBuffer().get();
            MyJapi.f314bb(f214bb);
            assert (nf214bb == f214bb.asReadOnlyBuffer().get());
            MyJapi.f314bb(MyJapi.f214bb());
            assert (nf214bb + 1 == f214bb.asReadOnlyBuffer().get());


            out.println("\ncalling f315bb(f215bb())");
            final ByteBuffer f215bb = MyJapi.f215bb().order(ByteOrder.nativeOrder());

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            final ByteBuffer f214bb = MyJapi.f214bb().order(ByteOrder.nativeOrder());
            final byte nf214bb = f214bb.asReadOnlyBuffer().get();
            MyJapi.f314bb(f214bb);
            assert (nf214bb == f214bb.asReadOnlyBuffer().get());
            MyJapi.f314bb(MyJapi.f214bb());
            assert (nf214bb + 1 == f214bb.asReadOnlyBuffer().get());


            out.println("\ncalling f315bb(f215bb())");
            final ByteBuffer f215bb = MyJapi.f215bb().order(ByteOrder.nativeOrder());
            final short nf215bb = f215bb.asShortBuffer().get();
            MyJapi.f315bb(f215bb);

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                        ByteBuffer out = _out.duplicate();
                        BufferUtil.clear(_out);
                        for (int i = 0; i < _writeCount; i++)
                        {
                            FutureCallback blockingWrite = new FutureCallback();
                            _endp.write(blockingWrite, out.asReadOnlyBuffer());
                            blockingWrite.get();
                        }
                        progress = true;
                    }

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                        raf.length());
            }


            // Assuming the file buffer might be shared cached version, so lets
            // take our own view of it
            buffer = buffer.asReadOnlyBuffer();


            // send the content as a buffer with a callback to complete the
            // async request need to caste to Jetty output stream for best API
            ((HttpOutput) response.getOutputStream()).sendContent(buffer,
                    completionCB);

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            long start = System.nanoTime();
            for (int j = 0; j < iterations; j++)
            {
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                long startRun = System.nanoTime();
                BufferUtil.writeTo(buffer.asReadOnlyBuffer(), out);
                long elapsedRun = System.nanoTime() - startRun;
//                LOG.warn("run elapsed={}ms", elapsedRun / 1000);
                assertThat("Bytes in out equal bytes in buffer", Arrays.equals(bytes, out.toByteArray()), is(true));
            }
            long elapsed = System.nanoTime() - start;

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        ByteArrayOutputStream out = new ByteArrayOutputStream();
        byte[] bytes = new byte[capacity];
        ThreadLocalRandom.current().nextBytes(bytes);
        ByteBuffer buffer = BufferUtil.allocate(capacity);
        BufferUtil.append(buffer, bytes, 0, capacity);
        BufferUtil.writeTo(buffer.asReadOnlyBuffer(), out);
        assertThat("Bytes in out equal bytes in buffer", Arrays.equals(bytes, out.toByteArray()), is(true));
    }
}

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        } else {
            try {
                ByteBuffer msg = 
                    ByteBuffer.wrap(
                        new byte[] { SimpleSgsProtocol.LOGOUT_REQUEST });
                sendRaw(msg.asReadOnlyBuffer());
            } catch (IOException e) {
                logger.logThrow(Level.FINE, e, "During graceful logout:");
                try {
                    loggedIn = false;
                    disconnectClientConnection();

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      buf.put(SimpleSgsProtocol.RELOCATE_REQUEST).
    put(SimpleSgsProtocol.VERSION).
    put(relocateKey).
    flip();
      try {
    sendRaw(buf.asReadOnlyBuffer());
      } catch (IOException e) {
    logger.logThrow(Level.FINE, e, "During relocate request:");
    logout(true);
      }
  }

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            logger.log(Level.FINEST, "Direct receive");
            checkLoggedIn();
            byte[] msgBytes = msg.getBytes(msg.limit() - msg.position());
            ByteBuffer buf = ByteBuffer.wrap(msgBytes);
            try {
                clientListener.receivedMessage(buf.asReadOnlyBuffer());
            } catch (RuntimeException e) {
                if (logger.isLoggable(Level.WARNING)) {
                    logger.logThrow(
                            Level.WARNING, e,
                            "SimpleClientListener.receivedMessage callback " +

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