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• ChannelState.java

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org.jboss.netty.channel.ChannelState Maven / Gradle / Ivy

/*
 * 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 org.jboss.netty.channel;

import java.net.SocketAddress;

/**
 * The current or future state of a {@link Channel}.
 * 

 * The state of a {@link Channel} is interpreted differently depending on the
 * {@linkplain ChannelStateEvent#getValue() value} of a {@link ChannelStateEvent}
 * and the direction of the event in a {@link ChannelPipeline}:
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Direction
State
Value
Meaning
Upstream
{@link #OPEN}
{@code true}
The channel is open.
Upstream
{@link #OPEN}
{@code false}
The channel is closed.
Upstream
{@link #BOUND}
{@link SocketAddress}
The channel is bound to a local address.
Upstream
{@link #BOUND}
{@code null}
The channel is unbound to a local address.
Upstream
{@link #CONNECTED}
{@link SocketAddress}
The channel is connected to a remote address.
Upstream
{@link #CONNECTED}
{@code null}
The channel is disconnected from a remote address.
Upstream
{@link #INTEREST_OPS}
an integer
The channel interestOps has been changed.
Downstream
{@link #OPEN}
{@code true}
N/A
Downstream
{@link #OPEN}
{@code false}
Close the channel.
Downstream
{@link #BOUND}
{@link SocketAddress}
Bind the channel to the specified local address.
Downstream
{@link #BOUND}
{@code null}
Unbind the channel from the current local address.
Downstream
{@link #CONNECTED}
{@link SocketAddress}
Connect the channel to the specified remote address.
Downstream
{@link #CONNECTED}
{@code null}
Disconnect the channel from the current remote address.
Downstream
{@link #INTEREST_OPS}
an integer
Change the interestOps of the channel.
 * 

 * To see how an event is interpreted further, please refer to {@link ChannelEvent}.
 */
public enum ChannelState {
    /**
     * Represents a {@link Channel}'s {@link Channel#isOpen() open} property
     */
    OPEN,

    /**
     * Represents a {@link Channel}'s {@link Channel#isBound() bound} property
     */
    BOUND,

    /**
     * Represents a {@link Channel}'s {@link Channel#isConnected() connected}
     * property
     */
    CONNECTED,

    /**
     * Represents a {@link Channel}'s {@link Channel#getInterestOps() interestOps}
     * property
     */
    INTEREST_OPS
}