42 lines
1.6 KiB
Java
42 lines
1.6 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.channel.nio;
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import java.nio.channels.SelectableChannel;
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import java.nio.channels.SelectionKey;
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import java.nio.channels.Selector;
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/**
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* An arbitrary task that can be executed by {@link NioEventLoop} when a {@link SelectableChannel} becomes ready.
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*
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* @see NioEventLoop#register(SelectableChannel, int, NioTask)
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*/
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public interface NioTask<C extends SelectableChannel> {
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/**
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* Invoked when the {@link SelectableChannel} has been selected by the {@link Selector}.
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*/
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void channelReady(C ch, SelectionKey key) throws Exception;
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/**
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* Invoked when the {@link SelectionKey} of the specified {@link SelectableChannel} has been cancelled and thus
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* this {@link NioTask} will not be notified anymore.
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*
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* @param cause the cause of the unregistration. {@code null} if a user called {@link SelectionKey#cancel()} or
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* the event loop has been shut down.
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*/
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void channelUnregistered(C ch, Throwable cause) throws Exception;
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}
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