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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).

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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.oio;

import io.netty.channel.AbstractChannel;
import io.netty.channel.Channel;
import io.netty.channel.ChannelPromise;
import io.netty.channel.EventLoop;
import io.netty.channel.ThreadPerChannelEventLoop;

import java.net.SocketAddress;

/**
 * Abstract base class for {@link Channel} implementations that use Old-Blocking-IO
 */
public abstract class AbstractOioChannel extends AbstractChannel {

    protected static final int SO_TIMEOUT = 1000;

    private volatile boolean readPending;

    private final Runnable readTask = new Runnable() {
        @Override
        public void run() {
            if (!isReadPending() && !config().isAutoRead()) {
                // ChannelConfig.setAutoRead(false) was called in the meantime so just return
                return;
            }

            setReadPending(false);
            doRead();
        }
    };

    /**
     * @see AbstractChannel#AbstractChannel(Channel)
     */
    protected AbstractOioChannel(Channel parent) {
        super(parent);
    }

    @Override
    protected AbstractUnsafe newUnsafe() {
        return new DefaultOioUnsafe();
    }

    private final class DefaultOioUnsafe extends AbstractUnsafe {
        @Override
        public void connect(
                final SocketAddress remoteAddress,
                final SocketAddress localAddress, final ChannelPromise promise) {
            if (!promise.setUncancellable() || !ensureOpen(promise)) {
                return;
            }

            try {
                boolean wasActive = isActive();
                doConnect(remoteAddress, localAddress);
                safeSetSuccess(promise);
                if (!wasActive && isActive()) {
                    pipeline().fireChannelActive();
                }
            } catch (Throwable t) {
                safeSetFailure(promise, annotateConnectException(t, remoteAddress));
                closeIfClosed();
            }
        }
    }

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

    /**
     * Connect to the remote peer using the given localAddress if one is specified or {@code null} otherwise.
     */
    protected abstract void doConnect(
            SocketAddress remoteAddress, SocketAddress localAddress) throws Exception;

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

        setReadPending(true);
        eventLoop().execute(readTask);
    }

    protected abstract void doRead();

    protected boolean isReadPending() {
        return readPending;
    }

    protected void setReadPending(boolean readPending) {
        this.readPending = readPending;
    }
}