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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS 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).

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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:
 *
 *   https://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.local;

import io.netty.channel.AbstractServerChannel;
import io.netty.channel.ChannelConfig;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.DefaultChannelConfig;
import io.netty.channel.EventLoop;
import io.netty.channel.PreferHeapByteBufAllocator;
import io.netty.channel.RecvByteBufAllocator;
import io.netty.channel.ServerChannel;
import io.netty.channel.ServerChannelRecvByteBufAllocator;
import io.netty.channel.SingleThreadEventLoop;
import io.netty.util.concurrent.SingleThreadEventExecutor;

import java.net.SocketAddress;
import java.util.ArrayDeque;
import java.util.Queue;

/**
 * A {@link ServerChannel} for the local transport which allows in VM communication.
 */
public class LocalServerChannel extends AbstractServerChannel {

    private final ChannelConfig config =
            new DefaultChannelConfig(this, new ServerChannelRecvByteBufAllocator()) { };
    private final Queue inboundBuffer = new ArrayDeque();
    private final Runnable shutdownHook = new Runnable() {
        @Override
        public void run() {
            unsafe().close(unsafe().voidPromise());
        }
    };

    private volatile int state; // 0 - open, 1 - active, 2 - closed
    private volatile LocalAddress localAddress;
    private volatile boolean acceptInProgress;

    public LocalServerChannel() {
        config().setAllocator(new PreferHeapByteBufAllocator(config.getAllocator()));
    }

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

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

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

    @Override
    public boolean isOpen() {
        return state < 2;
    }

    @Override
    public boolean isActive() {
        return state == 1;
    }

    @Override
    protected boolean isCompatible(EventLoop loop) {
        return loop instanceof SingleThreadEventLoop;
    }

    @Override
    protected SocketAddress localAddress0() {
        return localAddress;
    }

    @Override
    protected void doRegister() throws Exception {
        ((SingleThreadEventExecutor) eventLoop()).addShutdownHook(shutdownHook);
    }

    @Override
    protected void doBind(SocketAddress localAddress) throws Exception {
        this.localAddress = LocalChannelRegistry.register(this, this.localAddress, localAddress);
        state = 1;
    }

    @Override
    protected void doClose() throws Exception {
        if (state <= 1) {
            // Update all internal state before the closeFuture is notified.
            if (localAddress != null) {
                LocalChannelRegistry.unregister(localAddress);
                localAddress = null;
            }
            state = 2;
        }
    }

    @Override
    protected void doDeregister() throws Exception {
        ((SingleThreadEventExecutor) eventLoop()).removeShutdownHook(shutdownHook);
    }

    @Override
    protected void doBeginRead() throws Exception {
        if (acceptInProgress) {
            return;
        }

        Queue inboundBuffer = this.inboundBuffer;
        if (inboundBuffer.isEmpty()) {
            acceptInProgress = true;
            return;
        }

        readInbound();
    }

    LocalChannel serve(final LocalChannel peer) {
        final LocalChannel child = newLocalChannel(peer);
        if (eventLoop().inEventLoop()) {
            serve0(child);
        } else {
            eventLoop().execute(new Runnable() {
                @Override
                public void run() {
                    serve0(child);
                }
            });
        }
        return child;
    }

    private void readInbound() {
        RecvByteBufAllocator.Handle handle = unsafe().recvBufAllocHandle();
        handle.reset(config());
        ChannelPipeline pipeline = pipeline();
        do {
            Object m = inboundBuffer.poll();
            if (m == null) {
                break;
            }
            pipeline.fireChannelRead(m);
        } while (handle.continueReading());
        handle.readComplete();
        pipeline.fireChannelReadComplete();
    }

    /**
     * A factory method for {@link LocalChannel}s. Users may override it
     * to create custom instances of {@link LocalChannel}s.
     */
    protected LocalChannel newLocalChannel(LocalChannel peer) {
        return new LocalChannel(this, peer);
    }

    private void serve0(final LocalChannel child) {
        inboundBuffer.add(child);
        if (acceptInProgress) {
            acceptInProgress = false;

            readInbound();
        }
    }
}
    

    

    

            

    

            



    
    






    
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