com.couchbase.client.deps.io.netty.handler.codec.memcache.binary.AbstractBinaryMemcacheDecoder Maven / Gradle / Ivy
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The official Couchbase JVM Core IO Library
/*
* Copyright 2013 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 com.couchbase.client.deps.io.netty.handler.codec.memcache.binary;
import com.couchbase.client.deps.io.netty.buffer.ByteBuf;
import com.couchbase.client.deps.io.netty.buffer.Unpooled;
import com.couchbase.client.deps.io.netty.channel.ChannelHandlerContext;
import com.couchbase.client.deps.io.netty.handler.codec.DecoderResult;
import com.couchbase.client.deps.io.netty.handler.codec.memcache.AbstractMemcacheObjectDecoder;
import com.couchbase.client.deps.io.netty.handler.codec.memcache.DefaultLastMemcacheContent;
import com.couchbase.client.deps.io.netty.handler.codec.memcache.DefaultMemcacheContent;
import com.couchbase.client.deps.io.netty.handler.codec.memcache.LastMemcacheContent;
import com.couchbase.client.deps.io.netty.handler.codec.memcache.MemcacheContent;
import com.couchbase.client.deps.io.netty.util.CharsetUtil;
import java.util.List;
import static com.couchbase.client.deps.io.netty.buffer.ByteBufUtil.readBytes;
/**
* Decoder for both {@link BinaryMemcacheRequest} and {@link BinaryMemcacheResponse}.
*
* The difference in the protocols (header) is implemented by the subclasses.
*/
public abstract class AbstractBinaryMemcacheDecoder
extends AbstractMemcacheObjectDecoder {
public static final int DEFAULT_MAX_CHUNK_SIZE = 8192;
private final int chunkSize;
private M currentMessage;
private int alreadyReadChunkSize;
private State state = State.READ_HEADER;
/**
* Create a new {@link AbstractBinaryMemcacheDecoder} with default settings.
*/
protected AbstractBinaryMemcacheDecoder() {
this(DEFAULT_MAX_CHUNK_SIZE);
}
/**
* Create a new {@link AbstractBinaryMemcacheDecoder} with custom settings.
*
* @param chunkSize the maximum chunk size of the payload.
*/
protected AbstractBinaryMemcacheDecoder(int chunkSize) {
if (chunkSize < 0) {
throw new IllegalArgumentException("chunkSize must be a positive integer: " + chunkSize);
}
this.chunkSize = chunkSize;
}
@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List