Examples of java.nio.channels.SelectableChannel.configureBlocking()

Class java.nio.channels.SelectableChannel

Examples of java.nio.channels.SelectableChannel.configureBlocking()

java.nio.channels.SelectableChannel.configureBlocking()
Adjusts this channel's blocking mode.
If this channel is registered with one or more selectors then an attempt to place it into blocking mode will cause an {@link IllegalBlockingModeException} to be thrown.
This method may be invoked at any time. The new blocking mode will only affect I/O operations that are initiated after this method returns. For some implementations this may require blocking until all pending I/O operations are complete.
If this method is invoked while another invocation of this method or of the {@link #register(Selector,int) register} method is in progressthen it will first block until the other operation is complete.
@param block If true then this channel will be placed inblocking mode; if false then it will be placed non-blocking mode @return This selectable channel @throws ClosedChannelException If this channel is closed @throws IllegalBlockingModeException If block is true and this channel is registered with one or more selectors @throws IOException If an I/O error occurs

            synchronized (selectable.blockingLock()) {
                boolean oldBlocking = selectable.isBlocking();


                SelectionKey key = null;
                try {
                    selectable.configureBlocking(false);
                    
                    if (io != null) io.addBlockingThread(this);
                    currentSelector = getRuntime().getSelectorPool().get(selectable.provider());


                    key = selectable.register(currentSelector, ops);

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                    // remove this thread as a blocker against the given IO
                    if (io != null) io.removeBlockingThread(this);


                    // go back to previous blocking state on the selectable
                    try {
                        selectable.configureBlocking(oldBlocking);
                    } catch (Exception e) {
                        // ignore
                    }


                    // clear thread state from blocking call

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            SelectableChannel selectableChannel = (SelectableChannel)descriptor.getChannel();
            synchronized (selectableChannel.blockingLock()) {
                boolean oldBlocking = selectableChannel.isBlocking();
                try {
                    if (oldBlocking != block) {
                        selectableChannel.configureBlocking(block);
                    }
                    nWritten = descriptor.write(buffer);
                } finally {
                    if (oldBlocking != block) {
                        selectableChannel.configureBlocking(oldBlocking);

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                        selectableChannel.configureBlocking(block);
                    }
                    nWritten = descriptor.write(buffer);
                } finally {
                    if (oldBlocking != block) {
                        selectableChannel.configureBlocking(oldBlocking);
                    }
                }
            }
        } else {
            nWritten = descriptor.write(buffer);

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            java.nio.channels.Selector sel = SelectorFactory.openWithRetryFrom(null, ((SelectableChannel) descriptor.getChannel()).provider());
            SelectableChannel selchan = (SelectableChannel)descriptor.getChannel();
            synchronized (selchan.blockingLock()) {
                boolean is_block = selchan.isBlocking();
                try {
                    selchan.configureBlocking(false);
                    selchan.register(sel, java.nio.channels.SelectionKey.OP_READ);
                    ready_stat = sel.selectNow();
                    sel.close();
                } catch (Throwable ex) {
                } finally {

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                        try {
                            sel.close();
                        } catch (Exception e) {
                        }
                    }
                    selchan.configureBlocking(is_block);
                }
            }
            return ready_stat;
        } else {
            return newInputStream().available();

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            SelectableChannel selectableChannel = (SelectableChannel)descriptor.getChannel();
            synchronized (selectableChannel.blockingLock()) {
                boolean oldBlocking = selectableChannel.isBlocking();
                try {
                    if (oldBlocking) {
                        selectableChannel.configureBlocking(false);
                    }
                    return descriptor.write(ByteBuffer.wrap(buf.getUnsafeBytes(), buf.begin(), buf.length()));
                } finally {
                    if (oldBlocking) {
                        selectableChannel.configureBlocking(oldBlocking);

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                        selectableChannel.configureBlocking(false);
                    }
                    return descriptor.write(ByteBuffer.wrap(buf.getUnsafeBytes(), buf.begin(), buf.length()));
                } finally {
                    if (oldBlocking) {
                        selectableChannel.configureBlocking(oldBlocking);
                    }
                }
            }
        } else {
            // can't set nonblocking, so go ahead with it...not much else we can do

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        if (descriptor.getChannel() instanceof SelectableChannel) {
            SelectableChannel selectableChannel = (SelectableChannel)descriptor.getChannel();
            synchronized (selectableChannel.blockingLock()) {
                boolean oldBlocking = selectableChannel.isBlocking();
                try {
                    selectableChannel.configureBlocking(false);
                    return readpartial(number);
                } finally {
                    selectableChannel.configureBlocking(oldBlocking);
                }
            }

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                boolean oldBlocking = selectableChannel.isBlocking();
                try {
                    selectableChannel.configureBlocking(false);
                    return readpartial(number);
                } finally {
                    selectableChannel.configureBlocking(oldBlocking);
                }
            }
        } else if (descriptor.getChannel() instanceof FileChannel) {
            return fread(number);
        } else {

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