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BEGIN LICENSE BLOCK ***** Version: EPL 1.0/GPL 2.0/LGPL 2.1 The contents of this file are subject to the Eclipse Public License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Copyright (C) 2008 Ola Bini <> Alternatively, the contents of this file may be used under the terms of either of the GNU General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the LGPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of either the GPL or the LGPL, and not to allow others to use your version of this file under the terms of the EPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL or the LGPL. If you do not delete the provisions above, a recipient may use your version of this file under the terms of any one of the EPL, the GPL or the LGPL. END LICENSE BLOCK ***
 import org.jruby.Ruby;

Ola Bini
 public class NetProtocolBufferedIO { 
     public static void create(Ruby runtime) {
         RubyModule mNet = runtime.getModule("Net");
         RubyClass cBufferedIO = (RubyClass)mNet.getConstant("BufferedIO");
         RubyModule mNativeImpl = cBufferedIO.defineModuleUnder("NativeImplementation");
     @JRubyMethod(required = 1)
     public static IRubyObject initialize(IRubyObject recvIRubyObject io) {
         try {
             if (io instanceof RubyIO) {
                 RubyIO rubyIO = (RubyIO)io;
                 OpenFile of = rubyIO.getOpenFile();
                 Stream stream = of.getMainStreamSafe();
                 if (stream instanceof ChannelStream) {
                     ChannelStream cStream = (ChannelStream)stream;
                     if (cStream.getDescriptor().getChannel() instanceof SelectableChannel)  {
                         SelectableChannel selChannel = (SelectableChannel)cStream.getDescriptor().getChannel();
                                 new IRubyObject[]{((RubyModule)recv.getRuntime().getModule("Net").getConstant("BufferedIO")).getConstant("NativeImplementation")});
                         SelectableChannel sc = (SelectableChannel)(selChannel);
                         recv.dataWrapStruct(new NativeImpl(sc));
             recv.getInstanceVariables().setInstanceVariable("@rbuf", RubyString.newEmptyString(recv.getRuntime()));
             return recv;
        } catch (BadDescriptorException e) {
            throw recv.getRuntime().newErrnoEBADFError();
    public static class NativeImpl {
        private SelectableChannel channel;
        public NativeImpl(SelectableChannel channel) {
            this. = channel;
        public static IRubyObject rbuf_fill(IRubyObject recv) {
            RubyString buf = (RubyString)recv.getInstanceVariables().getInstanceVariable("@rbuf");
            RubyIO io = (RubyIO)recv.getInstanceVariables().getInstanceVariable("@io");
            int timeout = RubyNumeric.fix2int(recv.getInstanceVariables().getInstanceVariable("@read_timeout")) * 1000;
            NativeImpl nim = (NativeImpl)recv.dataGetStruct();
            Selector selector = null;
            synchronized ( {
                boolean oldBlocking =;
                try {
                    selector = SelectorFactory.openWithRetryFrom(recv.getRuntime(), SelectorProvider.provider());
                    SelectionKey key =;
                    int n =;
                    if(n > 0) {
                        IRubyObject readItems = IRubyObject[]{recv.getRuntime().newFixnum(1024*16)});
                        return buf.concat(readItems);
                    } else {
                        RubyClass exc = (RubyClass)(recv.getRuntime().getModule("Timeout").getConstant("Error"));
                        throw new RaiseException(RubyException.newException(recv.getRuntime(), exc"execution expired"),false);
                } catch(IOException exception) {
                    throw recv.getRuntime().newIOErrorFromException(exception);
                } finally {
                    if (selector != null) {
                        try {
                        } catch (Exception e) {
                    try {;} catch (IOException ioe) {}
}// NetProtocolBufferedIO
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