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/*
* Copyright 2015 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.glowroot.shaded.netty.channel.pool;
import org.glowroot.shaded.netty.channel.Channel;
import org.glowroot.shaded.netty.util.concurrent.Future;
import org.glowroot.shaded.netty.util.concurrent.Promise;
import java.io.Closeable;
import java.io.IOException;
/**
* Allows to acquire and release {@link Channel} and so act as a pool of these.
*/
public interface ChannelPool extends Closeable {
/**
* Acquire a {@link Channel} from this {@link ChannelPool}. The returned {@link Future} is notified once
* the acquire is successful and failed otherwise.
*/
Future acquire();
/**
* Acquire a {@link Channel} from this {@link ChannelPool}. The given {@link Promise} is notified once
* the acquire is successful and failed otherwise.
*/
Future acquire(Promise promise);
/**
* Release a {@link Channel} back to this {@link ChannelPool}. The returned {@link Future} is notified once
* the release is successful and failed otherwise. When failed the {@link Channel} will automatically closed.
*/
Future release(Channel channel);
/**
* Release a {@link Channel} back to this {@link ChannelPool}. The given {@link Promise} is notified once
* the release is successful and failed otherwise. When failed the {@link Channel} will automatically closed.
*/
Future release(Channel channel, Promise promise);
@Override
void close();
}