SimpleSizeEstimator.java

/*
 * 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.MessageSizeEstimator;

class SimpleSizeEstimator implements MessageSizeEstimator, MessageSizeEstimator.Handle {

  static final MessageSizeEstimator INSTANCE = new SimpleSizeEstimator();

  private SimpleSizeEstimator() {
  }

  @Override
  public Handle newHandle() {
    return this;
  }

  @Override
  public int size(final Object msg) {
    if (msg instanceof ByteBuf) {
      return ((ByteBuf) msg).readableBytes();
    }
    return 0;
  }
}