com.spotify.folsom.client.MemcacheEncoder.java Source code

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Here is the source code for com.spotify.folsom.client.MemcacheEncoder.java

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/*
 * Copyright (c) 2014-2015 Spotify AB
 *
 * 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 com.spotify.folsom.client;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageEncoder;

import java.nio.ByteBuffer;
import java.util.List;

public class MemcacheEncoder extends MessageToMessageEncoder<Request<?>> {

    public static final int MAX_ASCII_REQUEST = 100 + 50 * 256;
    public static final int MAX_BINARY_REQUEST = 50 * (256 + 32);
    public static final int MAX_REQUEST = Math.max(MAX_ASCII_REQUEST, MAX_BINARY_REQUEST);

    // Big enough to encode the largest possible request
    private final ByteBuffer workingBuffer = ByteBuffer.allocate(MAX_REQUEST);

    @Override
    public void encode(final ChannelHandlerContext ctx, final Request<?> request, final List<Object> out)
            throws Exception {
        workingBuffer.clear();
        final ByteBuf message = request.writeRequest(ctx.alloc(), workingBuffer);
        out.add(message);
    }

}