Examples of java.nio.ByteBuffer.compact()

java.nio.ByteBuffer.compact()
Compacts this byte buffer.
The remaining bytes will be moved to the head of the buffer, staring from position zero. Then the position is set to remaining(); the limit is set to capacity; the mark is cleared.
@return This buffer @exception ReadOnlyBufferException If no changes may be made to the contents of this buffer

                    ByteBuffer outbuf = connState.getOutbuf();
                    transferred = channel.read(outbuf);
                    if (transferred != -1) {
                        outbuf.flip();
                        encoder.write(outbuf);
                        outbuf.compact();
                    }
                }
                if (transferred == -1) {
                    encoder.complete();
                }

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            ByteBuffer buf = eb.getResource();
            final ByteBuffer ugBuffer = unget.getResource();


            if (ugBuffer.limit() - ugBuffer.remaining() > buf.remaining()) {
                //stuff the existing data after the data we are ungetting
                ugBuffer.compact();
                ugBuffer.put(buf);
                ugBuffer.flip();
                eb.free();
                connection.setExtraBytes(unget);
            } else {

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              throw new SSLException("unexpected status after wrap: "
                                     + result.getStatus());
            srv = result.getHandshakeStatus();
            snetBuffer.flip();
            result = clientEngine.unwrap(snetBuffer, empty);
            snetBuffer.compact();
            if (result.getStatus() != Status.OK)
              throw new SSLException("unexpected status after unwrap: "
                                     + result.getStatus());
            cli = result.getHandshakeStatus();

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            ByteBuffer buf = eb.getResource();
            final ByteBuffer ugBuffer = unget.getResource();


            if (ugBuffer.limit() - ugBuffer.remaining() > buf.remaining()) {
                //stuff the existing data after the data we are ungetting
                ugBuffer.compact();
                ugBuffer.put(buf);
                ugBuffer.flip();
                eb.free();
                connection.setExtraBytes(unget);
            } else {

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                } finally {
                    outputBuffer.clear();
                }
            }
        } finally {
            inputBuffer.compact();
        }
    }


    public void flush() throws IOException {
        synchronized (decoder) {

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                }
                checkMaxSize(channel, res);
                if (!buffer.hasRemaining()) {
                    buffer.flip();
                    data.write(buffer);
                    buffer.compact();
                    if (!bufferFullMessage) {
                        //if we are not reading the full message we return
                        return;
                    }
                }

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        try {
            final ByteBuffer buffer = ByteBuffer.allocate(8 * 1024);
            while (src.read(buffer) != -1) {
                buffer.flip();
                dest.write(buffer);
                buffer.compact();
            }
            buffer.flip();


            while (buffer.hasRemaining()) {
                dest.write(buffer);

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            ByteBuffer buf = eb.getResource();
            final ByteBuffer ugBuffer = unget.getResource();


            if (ugBuffer.limit() - ugBuffer.remaining() > buf.remaining()) {
                //stuff the existing data after the data we are ungetting
                ugBuffer.compact();
                ugBuffer.put(buf);
                ugBuffer.flip();
                eb.free();
                setExtraBytes(unget);
            } else {

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                    //in which case we notify the conduit and reset the state
                    if (state.isComplete()) {
                        if (state.prefix == 6) {
                            currentRequest.getAjpClientRequestConduit().setBodyChunkRequested(state.currentIntegerPart);
                            state.reset();
                            buffer.compact();
                        } else if (buffer.hasRemaining()) {
                            free = false;
                            pushBackStreamSourceConduit.pushBack(pooled);
                        }
                    } else {

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                    //in which case we notify the conduit and reset the state
                    if (state.isComplete()) {
                        if (state.prefix == 6) {
                            currentRequest.getAjpClientRequestConduit().setBodyChunkRequested(state.currentIntegerPart);
                            state.reset();
                            buffer.compact();
                        } else {
                            //todo: ping?
                            UndertowLogger.CLIENT_LOGGER.debugf("Received invalid AJP response code %s with no request active, closing connection", state.prefix);
                            //invalid, at this point read body chunk is all the server should be sending
                            IoUtils.safeClose(connection);

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