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    • io.netty.channel.udt.nio.NioUdtMessageConnectorChannel Maven / Gradle / Ivy

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    This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

    There is a newer version: 35.0.0.Beta1
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    /*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.channel.udt.nio;

import com.barchart.udt.TypeUDT;
import com.barchart.udt.nio.SocketChannelUDT;
import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import io.netty.channel.ChannelException;
import io.netty.channel.ChannelMetadata;
import io.netty.channel.ChannelOutboundBuffer;
import io.netty.util.internal.SocketUtils;
import io.netty.channel.nio.AbstractNioMessageChannel;
import io.netty.channel.udt.DefaultUdtChannelConfig;
import io.netty.channel.udt.UdtChannel;
import io.netty.channel.udt.UdtChannelConfig;
import io.netty.channel.udt.UdtMessage;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.List;

import static java.nio.channels.SelectionKey.*;

/**
 * Message Connector for UDT Datagrams.
 * 
    
 * Note: send/receive must use {@link UdtMessage} in the pipeline
 *
 * @deprecated The UDT transport is no longer maintained and will be removed.
 */
@Deprecated
public class NioUdtMessageConnectorChannel extends AbstractNioMessageChannel implements UdtChannel {

    private static final InternalLogger logger =
            InternalLoggerFactory.getInstance(NioUdtMessageConnectorChannel.class);

    private static final ChannelMetadata METADATA = new ChannelMetadata(false);

    private final UdtChannelConfig config;

    public NioUdtMessageConnectorChannel() {
        this(TypeUDT.DATAGRAM);
    }

    public NioUdtMessageConnectorChannel(final Channel parent, final SocketChannelUDT channelUDT) {
        super(parent, channelUDT, OP_READ);
        try {
            channelUDT.configureBlocking(false);
            switch (channelUDT.socketUDT().status()) {
            case INIT:
            case OPENED:
                config = new DefaultUdtChannelConfig(this, channelUDT, true);
                break;
            default:
                config = new DefaultUdtChannelConfig(this, channelUDT, false);
                break;
            }
        } catch (final Exception e) {
            try {
                channelUDT.close();
            } catch (final Exception e2) {
                logger.warn("Failed to close channel.", e2);
            }
            throw new ChannelException("Failed to configure channel.", e);
        }
    }

    public NioUdtMessageConnectorChannel(final SocketChannelUDT channelUDT) {
        this(null, channelUDT);
    }

    public NioUdtMessageConnectorChannel(final TypeUDT type) {
        this(NioUdtProvider.newConnectorChannelUDT(type));
    }

    @Override
    public UdtChannelConfig config() {
        return config;
    }

    @Override
    protected void doBind(final SocketAddress localAddress) throws Exception {
        privilegedBind(javaChannel(), localAddress);
    }

    @Override
    protected void doClose() throws Exception {
        javaChannel().close();
    }

    @Override
    protected boolean doConnect(final SocketAddress remoteAddress,
            final SocketAddress localAddress) throws Exception {
        doBind(localAddress != null? localAddress : new InetSocketAddress(0));
        boolean success = false;
        try {
            final boolean connected = SocketUtils.connect(javaChannel(), remoteAddress);
            if (!connected) {
                selectionKey().interestOps(
                        selectionKey().interestOps() | OP_CONNECT);
            }
            success = true;
            return connected;
        } finally {
            if (!success) {
                doClose();
            }
        }
    }

    @Override
    protected void doDisconnect() throws Exception {
        doClose();
    }

    @Override
    protected void doFinishConnect() throws Exception {
        if (javaChannel().finishConnect()) {
            selectionKey().interestOps(
                    selectionKey().interestOps() & ~OP_CONNECT);
        } else {
            throw new Error(
                    "Provider error: failed to finish connect. Provider library should be upgraded.");
        }
    }

    @Override
    protected int doReadMessages(List buf) throws Exception {

        final int maximumMessageSize = config.getReceiveBufferSize();

        final ByteBuf byteBuf = config.getAllocator().directBuffer(
                maximumMessageSize);

        final int receivedMessageSize = byteBuf.writeBytes(javaChannel(),
                maximumMessageSize);

        if (receivedMessageSize <= 0) {
            byteBuf.release();
            return 0;
        }

        if (receivedMessageSize >= maximumMessageSize) {
            javaChannel().close();
            throw new ChannelException(
                    "Invalid config : increase receive buffer size to avoid message truncation");
        }

        // delivers a message
        buf.add(new UdtMessage(byteBuf));

        return 1;
    }

    @Override
    protected boolean doWriteMessage(Object msg, ChannelOutboundBuffer in) throws Exception {
        // expects a message
        final UdtMessage message = (UdtMessage) msg;

        final ByteBuf byteBuf = message.content();

        final int messageSize = byteBuf.readableBytes();
        if (messageSize == 0) {
            return true;
        }

        final long writtenBytes;
        if (byteBuf.nioBufferCount() == 1) {
            writtenBytes = javaChannel().write(byteBuf.nioBuffer());
        } else {
            writtenBytes = javaChannel().write(byteBuf.nioBuffers());
        }

        // wrote message completely
        if (writtenBytes > 0 && writtenBytes != messageSize) {
            throw new Error(
                    "Provider error: failed to write message. Provider library should be upgraded.");
        }

        return writtenBytes > 0;
    }

    @Override
    public boolean isActive() {
        final SocketChannelUDT channelUDT = javaChannel();
        return channelUDT.isOpen() && channelUDT.isConnectFinished();
    }

    @Override
    protected SocketChannelUDT javaChannel() {
        return (SocketChannelUDT) super.javaChannel();
    }

    @Override
    protected SocketAddress localAddress0() {
        return javaChannel().socket().getLocalSocketAddress();
    }

    @Override
    public ChannelMetadata metadata() {
        return METADATA;
    }

    @Override
    protected SocketAddress remoteAddress0() {
        return javaChannel().socket().getRemoteSocketAddress();
    }

    @Override
    public InetSocketAddress localAddress() {
        return (InetSocketAddress) super.localAddress();
    }

    @Override
    public InetSocketAddress remoteAddress() {
        return (InetSocketAddress) super.remoteAddress();
    }

    private static void privilegedBind(final SocketChannelUDT socketChannel, final SocketAddress localAddress)
            throws IOException {
        try {
            AccessController.doPrivileged(new PrivilegedExceptionAction() {
                @Override
                public Void run() throws IOException {
                    socketChannel.bind(localAddress);
                    return null;
                }
            });
        } catch (PrivilegedActionException e) {
            throw (IOException) e.getCause();
        }
    }
}
    
    
    
    

    




    
    
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