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BitTorrent Client Library (Core)

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/*
 * Copyright (c) 2016—2017 Andrei Tomashpolskiy and individual contributors.
 *
 * Licensed 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 bt.net.pipeline;

import bt.net.Peer;
import bt.net.buffer.BorrowedBuffer;
import bt.net.buffer.BufferMutator;
import bt.net.buffer.IBufferManager;
import bt.protocol.Message;
import bt.protocol.handler.MessageHandler;
import com.google.inject.Inject;

import java.nio.ByteBuffer;
import java.nio.channels.ByteChannel;
import java.util.List;
import java.util.Optional;

public class ChannelPipelineFactory implements IChannelPipelineFactory {

    private final IBufferManager bufferManager;

    @Inject
    public ChannelPipelineFactory(IBufferManager bufferManager) {
        this.bufferManager = bufferManager;
    }

    @Override
    public ChannelPipelineBuilder buildPipeline(Peer peer) {
        return new ChannelPipelineBuilder(peer) {
            @Override
            protected ChannelPipeline doBuild(
                    Peer peer,
                    ByteChannel channel,
                    MessageHandler protocol,
                    Optional> inboundBuffer,
                    Optional> outboundBuffer,
                    List decoders,
                    List encoders) {

                BorrowedBuffer _inboundBuffer = inboundBuffer.orElseGet(bufferManager::borrowByteBuffer);
                BorrowedBuffer _outboundBuffer = outboundBuffer.orElseGet(bufferManager::borrowByteBuffer);

                return new DefaultChannelPipeline(peer, protocol, _inboundBuffer, _outboundBuffer, decoders, encoders);
            }
        };
    }
}