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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;

import io.netty.buffer.ByteBufAllocator;
import io.netty.util.UniqueName;
import io.netty.util.internal.PlatformDependent;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.concurrent.ConcurrentMap;

import static io.netty.util.internal.ObjectUtil.checkNotNull;

/**
 * A {@link ChannelOption} allows to configure a {@link ChannelConfig} in a type-safe
 * way. Which {@link ChannelOption} is supported depends on the actual implementation
 * of {@link ChannelConfig} and may depend on the nature of the transport it belongs
 * to.
 *
 * @param    the type of the value which is valid for the {@link ChannelOption}
 */
@SuppressWarnings("deprecation")
public class ChannelOption extends UniqueName {

    @SuppressWarnings("rawtypes")
    private static final ConcurrentMap names = PlatformDependent.newConcurrentHashMap();

    public static final ChannelOption ALLOCATOR = valueOf("ALLOCATOR");
    public static final ChannelOption RCVBUF_ALLOCATOR = valueOf("RCVBUF_ALLOCATOR");
    public static final ChannelOption MESSAGE_SIZE_ESTIMATOR = valueOf("MESSAGE_SIZE_ESTIMATOR");

    public static final ChannelOption CONNECT_TIMEOUT_MILLIS = valueOf("CONNECT_TIMEOUT_MILLIS");
    public static final ChannelOption MAX_MESSAGES_PER_READ = valueOf("MAX_MESSAGES_PER_READ");
    public static final ChannelOption WRITE_SPIN_COUNT = valueOf("WRITE_SPIN_COUNT");
    public static final ChannelOption WRITE_BUFFER_HIGH_WATER_MARK = valueOf("WRITE_BUFFER_HIGH_WATER_MARK");
    public static final ChannelOption WRITE_BUFFER_LOW_WATER_MARK = valueOf("WRITE_BUFFER_LOW_WATER_MARK");

    public static final ChannelOption ALLOW_HALF_CLOSURE = valueOf("ALLOW_HALF_CLOSURE");
    public static final ChannelOption AUTO_READ = valueOf("AUTO_READ");

    /**
     * @deprecated From version 5.0, {@link Channel} will not be closed on write failure.
     *
     * {@code true} if and only if the {@link Channel} is closed automatically and immediately on write failure.
     * The default is {@code false}.
     */
    @Deprecated
    public static final ChannelOption AUTO_CLOSE = valueOf("AUTO_CLOSE");

    public static final ChannelOption SO_BROADCAST = valueOf("SO_BROADCAST");
    public static final ChannelOption SO_KEEPALIVE = valueOf("SO_KEEPALIVE");
    public static final ChannelOption SO_SNDBUF = valueOf("SO_SNDBUF");
    public static final ChannelOption SO_RCVBUF = valueOf("SO_RCVBUF");
    public static final ChannelOption SO_REUSEADDR = valueOf("SO_REUSEADDR");
    public static final ChannelOption SO_LINGER = valueOf("SO_LINGER");
    public static final ChannelOption SO_BACKLOG = valueOf("SO_BACKLOG");
    public static final ChannelOption SO_TIMEOUT = valueOf("SO_TIMEOUT");

    public static final ChannelOption IP_TOS = valueOf("IP_TOS");
    public static final ChannelOption IP_MULTICAST_ADDR = valueOf("IP_MULTICAST_ADDR");
    public static final ChannelOption IP_MULTICAST_IF = valueOf("IP_MULTICAST_IF");
    public static final ChannelOption IP_MULTICAST_TTL = valueOf("IP_MULTICAST_TTL");
    public static final ChannelOption IP_MULTICAST_LOOP_DISABLED = valueOf("IP_MULTICAST_LOOP_DISABLED");

    public static final ChannelOption TCP_NODELAY = valueOf("TCP_NODELAY");

    @Deprecated
    public static final ChannelOption AIO_READ_TIMEOUT = valueOf("AIO_READ_TIMEOUT");
    @Deprecated
    public static final ChannelOption AIO_WRITE_TIMEOUT = valueOf("AIO_WRITE_TIMEOUT");

    @Deprecated
    public static final ChannelOption DATAGRAM_CHANNEL_ACTIVE_ON_REGISTRATION =
            valueOf("DATAGRAM_CHANNEL_ACTIVE_ON_REGISTRATION");

    /**
     * Creates a new {@link ChannelOption} with the specified {@param name} or return the already existing
     * {@link ChannelOption} for the given name.
     */
    @SuppressWarnings("unchecked")
    public static  ChannelOption valueOf(String name) {
        checkNotNull(name, "name");
        ChannelOption option = names.get(name);
        if (option == null) {
            option = new ChannelOption(name);
            ChannelOption old = names.putIfAbsent(name, option);
            if (old != null) {
                option = old;
            }
        }
        return option;
    }

    /**
     * Returns {@code true} if a {@link ChannelOption} exists for the given {@code name}.
     */
    public static boolean exists(String name) {
        checkNotNull(name, "name");
        return names.containsKey(name);
    }

    /**
     * Creates a new {@link ChannelOption} for the given {@param name} or fail with an
     * {@link IllegalArgumentException} if a {@link ChannelOption} for the given {@param name} exists.
     */
    @SuppressWarnings("unchecked")
    public static  ChannelOption newInstance(String name) {
        checkNotNull(name, "name");
        ChannelOption option = new ChannelOption(name);
        ChannelOption old = names.putIfAbsent(name, option);
        if (old != null) {
            throw new IllegalArgumentException(String.format("'%s' is already in use", name));
        }
        return option;
    }

    /**
     * @deprecated Use {@link #valueOf(String)} instead.
     */
    @Deprecated
    protected ChannelOption(String name) {
        super(name);
    }

    /**
     * Validate the value which is set for the {@link ChannelOption}. Sub-classes
     * may override this for special checks.
     */
    public void validate(T value) {
        if (value == null) {
            throw new NullPointerException("value");
        }
    }
}