Examples of org.jruby.util.io.ChannelDescriptor

org.jruby.util.io.ChannelDescriptor

ChannelDescriptor provides an abstraction similar to the concept of a "file descriptor" on any POSIX system. In our case, it's a numbered object (fileno) enclosing a Channel (@see java.nio.channels.Channel), FileDescriptor (@see java.io.FileDescriptor), and flags under which the original open occured (@see org.jruby.util.io.ModeFlags). Several operations you would normally expect to use with a POSIX file descriptor are implemented here and used by higher-level classes to implement higher-level IO behavior. Note that the channel specified when constructing a ChannelDescriptor will be reference-counted; that is, until all known references to it through this class have gone away, it will be left open. This is to support operations like "dup" which must produce two independent ChannelDescriptor instances that can be closed separately without affecting the other. At present there's no way to simulate the behavior on some platforms where POSIX dup also allows independent positioning information.


            }


            ModeFlags modeFlags = newModeFlags(runtime, ModeFlags.RDWR);


            return new ChannelDescriptor(channel, modeFlags);


        } catch(IOException e) {
            throw SocketUtils.sockerr(runtime, "initialize: " + e.toString());


        }

    @JRubyMethod(name = "ready?")
    public static IRubyObject ready(ThreadContext context, IRubyObject obj) {
        RubyIO io = (RubyIO)obj;
        try {
            OpenFile openFile = io.getOpenFile();
            ChannelDescriptor descriptor = openFile.getMainStreamSafe().getDescriptor();
            if (!descriptor.isOpen() || !openFile.getMainStreamSafe().getModes().isReadable() || openFile.getMainStreamSafe().feof()) {
                return context.runtime.getFalse();
            }


            int avail = openFile.getMainStreamSafe().ready();
            if (avail > 0) {

Examples of org.jruby.util.io.ChannelDescriptor

Related Classes of org.jruby.util.io.ChannelDescriptor