org.apache.pulsar.common.api.PulsarLengthFieldFrameDecoder.java Source code

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Here is the source code for org.apache.pulsar.common.api.PulsarLengthFieldFrameDecoder.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.pulsar.common.api;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.RecyclableSlicedByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;

/**
 * Decode the incoming msg without copying the buffer
 */
public class PulsarLengthFieldFrameDecoder extends LengthFieldBasedFrameDecoder {
    public PulsarLengthFieldFrameDecoder(int maxFrameLength, int lengthFieldOffset, int lengthFieldLength,
            int lengthAdjustment, int initialBytesToStrip) {
        super(maxFrameLength, lengthFieldOffset, lengthFieldLength, lengthAdjustment, initialBytesToStrip);
    }

    @Override

    protected ByteBuf extractFrame(ChannelHandlerContext ctx, ByteBuf buffer, int index, int length) {
        return RecyclableSlicedByteBuf.create(buffer, index, length);
    }
}